Race springs

Information / Questions and Discussion -
Imps and Imp based Motorsport stuff from the olden days and current
Post Reply
User avatar
knutspeed
Posts: 88
Joined: Sun Oct 25, 2009 7:01 am
Club Member: No
Car Model: Sunbeam Imp Sport

Race springs

Post by knutspeed » Tue Aug 21, 2012 8:02 pm

Hey all,
We've got Doc's car running quite nicely now running fat ACB10 Avons (FIA 1971 Imp). I tried it in the dry for the first time last sunday - lovely balance, grips like a Scalextric car compared to the Yokohamas. And it was so much more fun to drive than the Bevan replica I'm racing...must be those tires. I just couldn't believe how slow everybody were going around the bends :)

Just wondering - our imps are fitted with the stiffest off-the-shelf Imp race springs at the rear, and proflex single-adjustable shocks set to about 60%. However, I'd like to try to set the rear even stiffer. Anyone have any spring recommendations for this?
Matthew Birger Patrick (Knutsen)
Sarpsborg, Norway
FIA App K Historic Racing Imp - Bevan Tribute - www.shag.no
roperdev
Posts: 14
Joined: Fri Feb 24, 2012 8:51 pm
Club Member: Yes
Car Model: hillman imp 1971 rally car
Location: saffron walden essex
Contact:

Re: Race springs

Post by roperdev » Tue Aug 21, 2012 8:42 pm

Hi just looking at your post.
We are in the process of buiding a race imp ourseves for my son to race.
Just wondering what are the stiffest rear springs available?
You also mention proflex dampers?
Can these be easily purchased.
Best regards
Neil
SimonBenoy
Posts: 948
Joined: Mon Dec 01, 2003 8:27 pm
Club Member: Yes
Car Model: 68 Stiletto, 72 G15, 67 race Imp, 3 projects
Location: Stevenage, Herts

Re: Race springs

Post by SimonBenoy » Tue Aug 21, 2012 9:22 pm

Neil

We use 800lb rears on the HSCC cars in general. Various shocks are used.

Cheers - Simon
User avatar
knutspeed
Posts: 88
Joined: Sun Oct 25, 2009 7:01 am
Club Member: No
Car Model: Sunbeam Imp Sport

Re: Race springs

Post by knutspeed » Wed Aug 22, 2012 6:48 am

Neil, both the springs and shocks are available from UK motorsport outlets as Simon points out. Our other car runs Spax at the rear, and they also work well.
Our challenge compared to the UK racers are the wide tires allowed in the FIA Period G (71-spec). They have got so much grip I might want to try an even stiffer setup just for kicks. I'm not sure what the special saloon racers ran way back when, the difference is our Imps need to be heavier than they were in period.
Matthew Birger Patrick (Knutsen)
Sarpsborg, Norway
FIA App K Historic Racing Imp - Bevan Tribute - www.shag.no
roperdev
Posts: 14
Joined: Fri Feb 24, 2012 8:51 pm
Club Member: Yes
Car Model: hillman imp 1971 rally car
Location: saffron walden essex
Contact:

Re: Race springs

Post by roperdev » Wed Aug 22, 2012 7:57 am

Hi Simon,
Are you racing at the gold cup oulton park?
Regards
Neil
Teddie2003
Posts: 310
Joined: Sun Feb 20, 2005 10:06 am
Club Member: Yes
Car Model: Clan Crusader & Davrian Mk6
Location: Gosport, Hants

Re: Race springs

Post by Teddie2003 » Wed Aug 22, 2012 10:54 am

roperdev wrote:Hi Simon,
Are you racing at the gold cup oulton park?
Regards
Neil
Yes Simon is there along with 10 other Imps, according to the entry list on http://www.hscc.org.uk/calendar.
There are 40 cars entered inc reserves, 11 Imp/Chamois, 9 Lotus Cortina's, 7 Mini's, 5 Mustangs, some Falcons, Galaxies, Anglias,
Alfas and a Fiat as well.

Practice is 08.55 to 09:10, Race is 12.05 on Monday 27th
Post Reply