Info on 410 lift cams

mtnbikepoacher · Post by **mtnbikepoacher** » Tue Nov 16, 2004 3:32 pm

Hi all you race fans,
I'm looking into what is involved in the use of a 410 race cam. It looks like one needs to use a special cam carrier. Is the carrier positioned higher off the head? Are the valves the same size?

Thanks
Alan

benwick3 · Post by **benwick3** » Tue Nov 16, 2004 5:04 pm

Not used one myself but have competed against people using them and my conclusion is that they are not worth the additional cost. As you rightly say a special cam carrier is needed - Ian Carter's best money spinner. Valves are the same although different valve springs are needed and these use to be susceptible to breakage. Also, the head requires machining to fit the carrier.

No doubt others will disagree.

Pete Richards

mtnbikepoacher · Post by **mtnbikepoacher** » Tue Nov 16, 2004 6:25 pm

My friend is fitting his Beech GT racer with a 998 and he has been told by a fellow in Florida that races the same setup that the .410 is the way to develope the best maxx output. He has a engine that has a mystery cam in it now, and once he gets some rings for the head he'll be able to see what the power output is like.
The guy in florida said they are gfetting 135 MPH out of his car on the straights (I think the car weighs in at around 500lbs). I hear the Bevan Imp was getting clocked at that, and it's quite a bit more heavy. What was the Bevan car runnig for a cam? I could find the info but I left my Beven book at a friends house, and now it's making the rounds to all my other friends that have Imps! I haven't had a chance to read it

it does sound like alot of trouble to fit though.

Thanks
Al

Gerry Richards · Post by **Gerry Richards** » Wed Nov 17, 2004 3:55 pm

mtnbikepoacher wrote: The guy in florida said they are gfetting 135 MPH out of his car on the straights (I think the car weighs in at around 500lbs). I hear the Bevan Imp was getting clocked at that, and it's quite a bit more heavy. What was the Bevan car runnig for a cam?

I'm sure I've heard it ran an R23 - don't forget that top speed is a relationship between power and drag, not power and the mass of the vehicle. Two cars with similar power and similar cD will have similar top speeds irrespective of their mass, allowing for gearing and other friction losses - wonder what the cD and the gearing of the Bevan Imp was!!

impmann · Post by **impmann** » Wed Nov 17, 2004 4:05 pm

Ah... you should buy a copy of Martyn Morgan-Jones' brilliant book on the Bevan Imp and all will be revealed. Well, quite a lot anyway

Cheers
Tim

mtnbikepoacher · Post by **mtnbikepoacher** » Thu Nov 18, 2004 3:52 pm

Ah... you should buy a copy of Martyn Morgan-Jones' brilliant book on the Bevan Imp and all will be revealed. Well, quite a lot anyway

I Did! I can't get the book back from my friends! It's as if I brought it over for everyone else but me to read!
I left it at the guys house that has the beach so he could copy a pic, next thing I know he's finished reading it and wants a real Imp (so I guess I may have left it there on purpose

), then I get a call from another friend who now has it and he's raving about it!
I only made it through te first chapter when I lent it. I may never see it again

But if it gets someone to buy an Imp and get it back on the road, it has be a worthy sacrafice.

cheers
Al

johnh875 · Post by **johnh875** » Wed May 04, 2005 7:50 am

I’ve only just seen this topic, but a few years ago I was speaking to a bloke who raced the Eagle Imp here in Australia, it is a tiny open wheeler and he said the 410 cam put the power so far up the rev range that getting of the line was a real struggle. Now if it’s like that in an open wheeler I can only assume it would be hard work in an Imp. Only for very high rev/high speed stuff with an envelope-stretching engine I would say.

617sqn · Post by **617sqn** » Wed May 04, 2005 8:53 pm

"Disremember" !! What agreat word

Nearly as good as Martin Brundles "Dischuffed"

Andy

rootes · Post by **rootes** » Wed May 04, 2005 9:05 pm

article on Beach Mk4 in this months impressions

Si

johnh875 · Post by **johnh875** » Thu May 05, 2005 6:36 am

Not a bad tip Bill, it is not very often you have the problem of too much traction, eh? I’m not sure of the Eagle Imp period race history, but in recent historic racing I have seen it start handicap races on scratch nearly half a lap behind the second-last-away car which gives you some idea of its performance. PS when I say tiny the length of the car couldn’t be more than 7 feet.

onomatopoeia · Post by **onomatopoeia** » Wed Feb 06, 2008 3:01 pm

Bumping this from beyond the dawn of time (who says no-one uses the search facility).

Does anyone know the valve timings and inlet opening at TDC for the 410 camshaft?

HARRY · Post by **HARRY** » Wed Feb 06, 2008 4:50 pm

175 at tdc.

johnh875 · Post by **johnh875** » Thu Feb 07, 2008 4:52 am

Mark give me a day or three and I think I will be able to come up with something