Nosey
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| posted on 14/8/10 at 07:12 PM |
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Bonnet Bulge/Engine Height
Right, quick run down: Hillclimb/sprint car, home built book chassis, Aries (STM) bodywork, 2ltr C20XE, 4" deep home made wet sump, mounted
1" below the bottom of chassis.
Only done 2 events (a 3rd in class with lots of problems, then a 1st but with a weak-ish entry, so well happy!) The sump is hitting the ground so
I've upped the front springs from 250lb/in to 375lb/in for the next event and will have to trick around with the ride height (lower wishbones
horizontal when static?).
Question: why did I need to make the ugly bulge pictured? Is the engine mounted too high? Is the Aries bodywork too low-line? It's the one thing
with the car that really bugs me, so all opinions/advice welcome....
[img][/img]
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Humbug
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| posted on 14/8/10 at 07:32 PM |
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I've got a ST Locost and the bodywork (nose, bonnet, scuttle and rear) is lower than most others. I've got a K series with standard sump
and I had to use a bulge even after raising the nose with spacers on the sides
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big-vee-twin
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| posted on 14/8/10 at 07:33 PM |
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Book chassis was desiged to take a small engine such as the cross flow, so when you install a new twin cam engine they tend to be taller and therefore
interfere with the bonnet.
GTS make a nose, bonnet and scuttle desiged for the taller twin cam engines for the Panther which is based on the book chassis
Duratec Engine is fitted, MS2 Extra V3 is assembled and tested, engine running, car now built. IVA passed 26/02/2016
http://www.triangleltd.com
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MikeR
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| posted on 14/8/10 at 08:26 PM |
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NS Dev managed it - he used the caterham sump.
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Nosey
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| posted on 14/8/10 at 08:45 PM |
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quote:
Originally posted by MikeR
NS Dev managed it - he used the caterham sump.
The only thing is I think I read somewhere that the Caterham sump was 100mm deep, same as my own. I even got a QED dry sump pan to measure and
it's not a hell of a lot shallower than the wet one we made up. I think I was just too chicken to go for the type of ground clearance NSDev must
be running, cos no matter what way I looked at it I just couldn't see it fitting under that bonnet!
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Nosey
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| posted on 14/8/10 at 08:54 PM |
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Yep, looked at NSDev's pics and the sump seems lower in the chassis alright. I think the best bet is to go testing with the new springs and see
what the ground clearance is like. I just need a volunteer to lie on the track and stare at the sump as I drive full whack towards him and stand on
the brakes...
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MikeR
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| posted on 14/8/10 at 08:56 PM |
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it fits and he drives on the road.
The engine is fitted so its literally as far forward as touching the nose cone. He ground off the lip under the nose cone and the engine is a mm or
few from underneath the GRP that the bonnet rests upon.
Can't tell you what the ground clearance is, but its probably over 3 inches. Try contacting him on here or via his company RetroPower.
He's likely to be really busy so don't be upset of you don't get a response.
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907
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| posted on 15/8/10 at 08:22 AM |
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Hi Nosey.
You say in your O/P that you find your bulge ugly.
Just my opinion, but the shape of it to me screams "air intake".
Would it be more pleasing to your eye if the front of it was cut out and replaced with fine mesh?
It would break up your stripes and look more functional IMHO.
I hope I haven't offended you by saying this.
Cheers
Paul G
Image deleted by owner
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Nosey
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| posted on 16/8/10 at 07:41 AM |
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No offence at all Paul, it had actually crossed my mind but the engine is dead tight to the bulge so it would have to be a "fake" intake,
maybe fine mesh stuck on with a black background. Another option I was thinking of was making a corresponding bulge in the nosecone to tidy up the
lines, also adding an air outlet in this one to duct the air out from the rad. These cars are never actually "finished", are they?
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procomp
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| posted on 17/8/10 at 09:29 PM |
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Hi
I do happen to know of someone who has all the bodywork that allows the zetec and other taller twin cam engines to fit in the Book type chassis with a
6" wett sump siiting level with the base of the chassis IE flat floored. With no bonnet bulge.
 
Sheriden Bells engine bay
[/img]
Cheers Matt
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phelpsa
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| posted on 17/8/10 at 09:37 PM |
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The Aries bodywork is fairly low line. The sump on mine sits a little over an inch below the bottom of the chassis and I (as of yet) have had no
problems with it scraping on anything. I can't remember what Matt (procomp) set it at but I think it was something around 3" ground
clearance from the bottom of the sump, which looks like this:
Thats running a bike engine (around 230kg front axle weight) and 300lb/inch springs.
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