Sunbeam Stiletto with a Kawasaki Engine.

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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by Dogsbody » Wed May 06, 2015 10:29 am

I got sent a link to your car on Ebay the other day by a mate.

Good luck with the sale...

No mine not going to the National, too far.
Its wanted at a show in Salisbury next month, but I'm not keen on driving it the 30 miles or so there. :lol:
So the Racing Puma will be going I expect.

Just sorted out the order for Lexan side windows with air scoops and the Stiletto badges reproductions.

Radiator in and looks really good :)
All other bits are on order for next week.
70 Sunbeam Stiletto (again)125bhp Kawasaki Ninja power.
00 Ford Racing Puma (by Tickford) with 40 bhp of Nitrous Oxide.
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by Dogsbody » Sat May 16, 2015 6:46 am

Image
Fiat radiator all fitted, just missing a jubilee clip which I will fit on Monday.
Rerouted the bottom hose much lower down, which I'm really happy with. :D

Need to modify the fan mount before fitting that.

Lexan windows have also arrived from www.acwmotorsportplastics.co.uk
Look good, the scoops are not as big as I thought, so won't look too obvious :wink:

Going to try and get them fitted by the end of next week, if I can get a free day with "Protint" in Trowbridge.

Then I need to give it a good clean as I have a magazine photographer who wants to take some pictures 8)
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by bazzateer » Sat May 16, 2015 9:12 am

Dogsbody wrote:I got sent a link to your car on Ebay the other day by a mate.

Good luck with the sale...

No mine not going to the National, too far.
Its wanted at a show in Salisbury next month, but I'm not keen on driving it the 30 miles or so there. :lol:
So the Racing Puma will be going I expect.

Just sorted out the order for Lexan side windows with air scoops and the Stiletto badges reproductions.

Radiator in and looks really good :)
All other bits are on order for next week.
Have you built it just as a track day car then? :(
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by Lotus-e-Clan » Sat May 16, 2015 10:32 am

bazzateer wrote: Have you built it just as a track day car then? :(
I think Clark's BMW K-it Clan is the only bike engined conversion I've seen that makes sense for the road cos it keeps the rear engined configuration without 'cut and shut' and there's no chain to worry about.

It would seem mid engined conversions do at least need a proper bulkhead division to make them work as all-round road cars....but who has done that todate?
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by lewisparrot » Sat May 16, 2015 2:37 pm

imp 2.jpg
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This is the bulk head I have fitted to my car which works quite well
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by Dogsbody » Sat May 16, 2015 9:39 pm

bazzateer wrote:
Dogsbody wrote:I got sent a link to your car on Ebay the other day by a mate.

Good luck with the sale...

No mine not going to the National, too far.
Its wanted at a show in Salisbury next month, but I'm not keen on driving it the 30 miles or so there. :lol:
So the Racing Puma will be going I expect.

Just sorted out the order for Lexan side windows with air scoops and the Stiletto badges reproductions.

Radiator in and looks really good :)
All other bits are on order for next week.
Have you built it just as a track day car then? :(
No its a road, car MOT'ed and Taxed, but it's not a car to drive any distance.....
A bit LOUD and hot in there.

The new windows with air scoops will help as will a firewall when I get around to it.

I built it as a FUN car and it is that :D not as anything practical.
Needs to put a smile on my face and I will use it out and about to and from work occasionally.

The gearing is 10 mph per 1000 rpm, so its a bit of a screamer. Top speed is 110 mph
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by bazzateer » Sun May 17, 2015 12:08 am

Just seems a shame to do all that work and not want to drive it just 30 miles! (Let alone up to Darlington).
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by Dogsbody » Sun May 17, 2015 11:43 am

bazzateer wrote:Just seems a shame to do all that work and not want to drive it just 30 miles! (Let alone up to Darlington).
Darlington, Lol in a Imp...My Dad lives at Barnard Castle and I know how far it is. :wink:
Might send him along for a look, he likes his classic cars.

Takes me 5+ hours in a modern Toyota on motorways.
In a 45 year old classic..I think not. Even if it was standard.

I expect I will do the "Wicked Welsh" next year and various other shows in the West Country, Shepton Mallet, Bristol etc.
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00 Ford Racing Puma (by Tickford) with 40 bhp of Nitrous Oxide.
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by bazzateer » Sun May 17, 2015 4:05 pm

Lightweight! :lol:

My Imp has been up to Scotland, Yorkshire and Holland. All part of the adventure!
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by ImpManiac » Sun May 17, 2015 5:37 pm

It would be good to see your Stiletto, Graham. :) Bring it... Go on... :twisted:

IM 8)
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by The Nun » Sun May 17, 2015 6:17 pm

You could hide the trailer round the corner then drive in and make out youve driven all the way, someone might buy you a pint :lol:
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by lewisparrot » Thu May 21, 2015 8:16 pm

I will buy you a pint Graham
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by Dogsbody » Fri May 22, 2015 6:59 am

It will be at the Classic and Kit car action day at Castle Combe next month.
There is always a few Imps etc on a stand there, I have mid morning track time booked :shock:
I'm assured I will be in a group with "Classics" so that should be exciting :lol:

Plenty of other shows in the area.
Besides I'm more a drive and enjoy than polish and show owner. :wink:

Saying that, I have a magazine photo shoot next week, so I need to polish it :lol:
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by pubcrawler » Fri May 22, 2015 7:27 am

Keep us informed of when and what magazine you'll be in please :D
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by Dogsbody » Fri May 22, 2015 8:47 pm

pubcrawler wrote:Keep us informed of when and what magazine you'll be in please :D
Will Do,

I changed the wiring to the Kawasaki CDI unit today, using the original white and green wire to power it.
Rev counter started working :shock:
Quite a bit optimistic, as I know its reading X2.
Hits the stop very easily.
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by Dogsbody » Fri May 29, 2015 5:24 am

Image

Took it over to Castle Combe this morning, for a run out, and drop a club booking form in for Rallyday.
Still running too hot, especially when I drive it hard.
Almost certain it's restrictions getting the air "out" so I'm going to cut the bottom out the spare wheel well and may add some vents in the wheel arches.
Also thinking about just removing the bonnet and giving it a couple of fast runs just to prove before cutting too much away :wink:

There was a Porsche track day on.
Had a few people look and give nice comments :D

Handling has a " Issue" too, if I had a rear beam axle in there, I would have said it was moving...
Back end feels loose, May just be tyre pressures as its poly bushed, so nothing is loose or has play.
Any idea's ?
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by Lotus-e-Clan » Fri May 29, 2015 6:51 am

I'm running powerCool 180 in the Clan and I can see a significant difference in cooling efficiently when the EWP80 is running slow compared to full speed. The pump needs to keep the flow high because Evans will pick up heat quicker than water (and give it up too) but it holds less heat per unit volume. With water as a coolant, slow flow rates are OK as water will take more heat per unit volume and water is slower at picking up the heat and giving it up at the rad too.

I also found it more difficult to remove air from the system than when I had water in the same system. Evans is more viscous and holds air pockets more stubbornly. I ran mine with NO pressure cap at first but soon realised the system needed help to shift the air pockets at the front of the car ( I have additional temp sensors in the front circuit telling me the water isn't getting hot quickly enough). - After several long road runs with a 7lb cap the coolant level dropped in the header (no leaks - this is air). I've now down graded to a 4Lb cap and will try the zero pressure cap once I'm happy all air has shifted.

So there may be a number of things at play . pump flow rates, coolant circuit pathway issues /stubborn airlocks, and radiator air flow. I was never convinced you had a problem with radiator size ... and optimising the whole air flow from entry to exit into a LOW pressure area is key before moving up in capacity (as you don't want to add weight to a race car if nothing else).

Also don't forget that the engine is pushing a heavier load with a massive aero disadvantage at high speed (the Imp is a brick!) than when in a bike.

Handling-wise - the weight of the engine is more forward (mid) rather than hanging out the back, simply put, that must mean the rear suspension has less work to do and the front suspension has more. The original IMP rear geometry is specially designed with a low roll centre to stop rear end steer with the weight way out the back (and the geo stops rear wheel toe-in /tucking-under on compression) - so the aggressive design may be working against you with the mid configuration - who knows?

Obviously spring and damper rates need to be re-calibrated to compensate as the leverage pivot hasn't changed (geo and pick-up points) but the load has moved closer and leverage effect will be less. The overall effect may mean the rear tyres are skitting /skating and loosing contact with the black stuff so it wouldn't be a surprise if a change in pressure (lower) modifies behaviour -but it may kill you once the limit of grip has passed if the rear isn't working harmoniously with the loads you have!

BTW. I can understand the admiration you got - it does look fantastic - especially in that red. 8)
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by colimp66 » Fri May 29, 2015 9:08 am

This may be a silly question but here goes.

What temp gauge are you using with the Kawasaki engine? Is it the Imp one or the original form the Kawasaki clock set?

Ok that's two questions, :) Apologies if you have already mentioned this in the thread.

Col.
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by Dogsbody » Fri May 29, 2015 4:07 pm

Magazine photo shoot today.
Just one of two pictures I was sent.
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by Lotus-e-Clan » Fri May 29, 2015 4:15 pm

Looks great all red and firey!
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by Dogsbody » Fri May 29, 2015 10:30 pm

colimp66 wrote:This may be a silly question but here goes.

What temp gauge are you using with the Kawasaki engine? Is it the Imp one or the original form the Kawasaki clock set?

Ok that's two questions, :) Apologies if you have already mentioned this in the thread.

Col.
I have two temp gauges, the original fed from a original sender in the Kawasaki engine and a after market digital on on a pod beside the 11,000rpm rev counter.
The digital one is all I really look at.

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70 Sunbeam Stiletto (again)125bhp Kawasaki Ninja power.
00 Ford Racing Puma (by Tickford) with 40 bhp of Nitrous Oxide.
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by Dogsbody » Sat May 30, 2015 6:06 am

Like I said above, the bottom of the spare wheel well is going next week.
Will strength be compromised much?
Whats the general view as I know people have cut it out.
Either that or I use a big hole cutter and make big holes in it.

Also I have seen vents put into the front of the wheel arches.
Quite like that idea and picked up some alloy vents yesterday with that in mind.

Need to get it sorted next week as I want to drive it for a couple of weeks before I use it on track.
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by ImpManiac » Sat May 30, 2015 9:37 pm

Cutting the spare wheel well out is alleged to remove some of the strength - yes. So beware. :!:

When I cut mine out, I did some reinforcing of the floor. There are photos somewhere in the ManiacImp thread. Not sure which page. Sorry. :oops: It is possible to put strength back in. I boxed the front swing arm mounts and linked them to the front panel with some 16 swg (or thereabouts) mild steel plate. I added some box section to support the slam panel too. I haven't done it yet but you could also weld in some 1" by 1" box section into the channel in the floor between the chassis rails. I will be doing this to mine, I think. :idea:

I hope this helps. :wink:

EDIT - My floor reinforcement photos are on page 6 of the ManiacImp thread. :idea:

IM 8)
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by colimp66 » Sun May 31, 2015 11:35 am

I've cut out the spare wheel well of my Imp to allow hot air out once I have fitted the front rad I have.
Before doing the spare wheel well I strengthened the front suspension mount area like IM as shown on page 8 of my thread of The Pest.
Using a length of box section to tie both chassis rails and the mount area altlogether.
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by Dogsbody » Mon Jun 01, 2015 12:02 pm

Ok thanks for the advice.
I already have 1" box section across the front of the car top and bottom for the radiator frame, so will just add a couple of bolt in sections bracing off it :wink:
Really can't wait to let rip in anger with no over heating.

Also just been told Evans waterless coolant want to use a picture of the car in their adverts and I can have some stuff for free :D
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by moose » Mon Jun 01, 2015 1:36 pm

one thing that wont be helping with the cooling is pre-heating your petrol by not having the hot air ducted away from the fuel tank and the routing of the rad pipe over the tank. you will be surprised at the heat you will build up in the tank, pre-heated petrol has the same effect as running to much ignition advance which generates more heat i nthe engine. i would say that the size of rad is adequate so long as all the air coming in through the front panel cannot go anywhere (not even a mall 6 mm gap along an edge) but through the radiator you then need to duct air out of the boot area and keep the tank cool. arguments for ducting up are ....

1. UP, heat rises. So when staionary, heat is escaping preventing heat soak, also less resistance to airflow when moving i.e. you are assisting the air to go in the direction it wants to go rather than forcing it to move so helps cooling at lower speeds
2. UP, ducting through bonnet does not remove strength from floor area so requires no re-enforcing to suspension pick up points
3. UP, if the duct outlet is put in correct place low pressure on the bonnet helps suck air out (now you have 3 things helping remove hot air)
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by Dave ' Linwood ' Lane » Mon Jun 01, 2015 3:38 pm

I vented my old Stiletto front rad up , i used a small grill from a Jaguar , this even had fittings for the washer jet , can be seen in these photos ( just )
There was a scoop underneath and a small drain pipe which prevented the boot filling up with rain water .
Not sure exactly how effective it was but it never over heated thats for sure .
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by lewisparrot » Mon Jun 01, 2015 4:14 pm

Hi Graham before cutting your car try a quick run without the bonnet if it still overheats then you need to look elsewhere also on my car I had to drill a 6mm hole in the thermostat which allowed water to flow enough for the thermostat to respond quicker, just a thought. Good luck Lewis
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by Dogsbody » Tue Jun 02, 2015 9:49 pm

lewisparrot wrote:Hi Graham before cutting your car try a quick run without the bonnet if it still overheats then you need to look elsewhere also on my car I had to drill a 6mm hole in the thermostat which allowed water to flow enough for the thermostat to respond quicker, just a thought. Good luck Lewis
I did think about doing a no bonnet run out, but i'm 99% air out is my problem, so disk cutter at the ready tomorrow when I get back from Swindon in the morning :o
Stat was binned at the start Lewis .

I also need to lift the fuel tank as the "one" jubilee clip I can't get to in the car is leaking :lol:

Got a bit of sponsorship too :)
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by Lotus-e-Clan » Wed Jun 03, 2015 7:07 am

Well done - the exposure can only be a good thing for Imp-related perceptions and values! 8) - I guess Evan's doesn't need to know you haven't solved your cooling issue at this point - it's only a matter of time before you do. :wink:

The advert claim re: BHP is interesting. Gave mine a sustained boot-full to 8500rom on Monday during a routine commute and subjectively it felt very strong even though it was against a very strong headwind - hard to tell if that's a real BHP increase but i'd be happy to believe it given the wind strength. :)

During the blast the Evans temp didn't rise as quickly nor as high compared to when on water but then it now has an ally rad and the floor scoop has changed and the (cool) strong headwind adds to ram - so that'stoo many variables to assess. However I suspect the oil temp which rose to 95C - probably did so more quickly - So more thinking to do about that :? ..eg I wonder:
1) because the Evan's consistency /specific heat is closer now to oil than water, the heat exchange between the two at the Laminova is less? - or
2) maybe it's the flow impedance through the narrow Laminova water channels which I guess has been optimised for the less viscous water? - or
3) there is a little more BHP which means more heat in the cylinders and so more is going into the oil?
4) all or none of the above? :?

That said, the weather is so cold for time of year it was only 11-13C on Monday... the real test will be when the air temp goes above 25C :o
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by The Nun » Wed Jun 03, 2015 8:09 am

How much more BHP do you get from just filling it up with Evans coolant then? is it hardly worth mentioning or does it bring a standard up to 998 performance? and do they have proof it does on a IMP engine?
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by Lotus-e-Clan » Wed Jun 03, 2015 8:51 am

The Nun wrote:How much more BHP do you get from just filling it up with Evans coolant then? is it hardly worth mentioning or does it bring a standard up to 998 performance? and do they have proof it does on a IMP engine?
Won't be much, if any, straight out of the tin especially with a std motor.

I believe it's based on Evan's NOT producing steam in the water jacket next to the chamber/liners when you give it the FULL beans -that means combustion temps can be lower, which means you have more margin to play with tuning ...compression ratio's cam timing, fueling and ignition advance etc. OR, if you already have high compression ratio and are working with lean full power fueling (AFR 13.2-13.5 like mine) + advanced ignition, you might get a bit more out (with a bit of wishful thinking :lol: !) Clan004
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by The Nun » Wed Jun 03, 2015 9:02 am

Hmmm a bit of attention grabbing advertising waffle then really, I doubt the normal owner would notice the slightest change?
Bit like those thing they said stick in the fuel lines to turn your paraffin fuel into 5 star then?
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Lotus-e-Clan
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by Lotus-e-Clan » Wed Jun 03, 2015 9:08 am

The Nun wrote:Hmmm a bit of attention grabbing advertising waffle then really, I doubt the normal owner would notice the slightest change?
Bit like those thing they said stick in the fuel lines to turn your paraffin fuel into 5 star then?
Yes only tuners need apply re: BHP potential.

The corrosion side of it is pretty good mind you. Just think ..no more corroded WRs or the surface area of the head between liners, nor the thermostat housing AND nor that pesky head bolt at the far bottom corner of the block!

And pressure-wise I'm running just a 4lb cap atm - it's working well and enough to get the air pockets moved ...not sure I'll bother with the zero rad cap - except it has a pretty natty thermometer built-in. :roll:

A while back I ran a 13lb cap when I was on water for a short while to see if cooling improved on full throttle . Unfortunately the extra water jacket pressure was enough to breach the WRs (water consumption went up and the plugs looked clean) so I went back to the 7lb cap and all was well.

So running Evans with no pressure migh help those Impers with HG issues?
Last edited by Lotus-e-Clan on Wed Jun 03, 2015 9:18 am, edited 1 time in total.
74 Clan Crusader 1040 Red 190 bhp/ton
The Nun
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by The Nun » Wed Jun 03, 2015 9:18 am

It does seem good on that basis and I will try some just for that.
I wasnt expecting any BHP really I just had my fingers crossed a 10 quid bottle of it might save me £3000 getting a 998. :D
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Dogsbody
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by Dogsbody » Wed Jun 03, 2015 9:45 pm

The Nun wrote:It does seem good on that basis and I will try some just for that.
I wasnt expecting any BHP really I just had my fingers crossed a 10 quid bottle of it might save me £3000 getting a 998. :D
Try a £100 a gallon ;)

I'm not interested in BHP, I was interested in a non pressurised cooling system inside the car with me ;)
I already have 125 bhp, which believe me is more than enough for the time being in a light car :lol:
70 Sunbeam Stiletto (again)125bhp Kawasaki Ninja power.
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by gnatman » Thu Jun 04, 2015 9:08 pm

Could the cooling issue be down to the relatively small opening in the front panel ?

When I first fitted the Fiat rad I had the same opening size as you but cooling was marginal. I drilled a series of 32mm holes above and it was fine from then on.
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by Lotus-e-Clan » Thu Jun 04, 2015 10:27 pm

gnatman wrote:Could the cooling issue be down to the relatively small opening in the front panel ?

When I first fitted the Fiat rad I had the same opening size as you but cooling was marginal. I drilled a series of 32mm holes above and it was fine from then on.
Small openings are a good idea if it opens into a large enough plenum -the sudden air expansion drops the air temp (gas laws).

I assessed my own rad scoop opening by comparing temperature difference between ram air (at a range of road speeds) and continuous fan operation (fan has to be man enough). If continuous Fan operation gives significantly lower temps then most likely ram air could be improved (bigger opening or larger plenum volume). Otherwise if both modes of operation give similar temps them problem lies elsewhere (like exit air flow or coolant flow). Clan004
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by gnatman » Fri Jun 05, 2015 10:42 pm

I have my rad boxed in nicely and have no issues with it but wasnt sure If Mr Dogsbody had just the small opening and no plenum as such fitted
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Re: Sunbeam Stiletto with a Kawasaki Engine.

Post by Lotus-e-Clan » Fri Jun 05, 2015 10:46 pm

gnatman wrote:I have my rad boxed in nicely and have no issues with it but wasnt sure If Mr Dogsbody had just the small opening and no plenum as such fitted
tbh I don't know if he has a big enough plenum either - if it's too small, say because there is not enough room in front of the rad, then you would need a bigger opening as you say for sure. :)
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