| [ Total Views: 1321 | Total Replies: 14 | Thread Id: 85786 ] |
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 Aussie Dubbin
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| posted on September 3rd, 2010 at 02:35 PM |
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Weight in the Front...?
Hi guys,
I have put a few posts up about building a racer... but i was interesed to know what you racers were doing about weight in the front??? Do you simply
rely on the car being setup well or do you still add weight in the front???
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1303Steve
A.k.a.: Steve Carter
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| posted on September 3rd, 2010 at 03:09 PM |
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Hi
Its better to set the car up properly, weight can be added to the car for racing class restrictions.
You need to follow the old racers tip, want more horsepower; add more light weight.
Steve
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Aussie Dubbin
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| posted on September 3rd, 2010 at 03:49 PM |
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That's what i was wandering...
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HappyDaze
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| posted on September 3rd, 2010 at 04:07 PM |
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Colin Chapman (LOTUS) used to say "If you want to add anything (to a race car), add lightness"
I'd rather wear a Beetle out by racing it than by polishing it!
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PAZZAN
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| posted on September 3rd, 2010 at 04:20 PM |
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lighter the better
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mactaylor
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| posted on September 4th, 2010 at 04:40 AM |
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instead of adding weight try to redistibute weight, like moving the battery, moving motor and gearbox forward. anything infront or behind the axles
should go on a diet like your bumpers and brackets.
EVERLAST CONCRETE TANKS
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Aussie Dubbin
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| posted on September 4th, 2010 at 10:01 AM |
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I agree, I agree, do you have to compensate though... you can check my other threads to see what i am planning, but basically, lowered front and rear,
camber -2*, 2 castor shims each side, adjustable swaybars F and R, refurb all joints and shocks, aiming for KONI adjustable, rear kafer bar, rear
engne support bar, ???
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sander288
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| posted on September 4th, 2010 at 11:27 AM |
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Weight at the end of the day is weight, and the less the better, what you've proposed to put on should make the car handle well. What Mactaylor said
is the best thing if you are really worried about weight distribution.
The point is though that until you've really felt how the car handles at the "limit" you won't know what to do, so add your bits a pieces and go
from there, you might even find that you'll remove some things.
I've been told under good authority though that Konis don't need to be wound up to much on the front other wise your front won't stick.
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1303Steve
A.k.a.: Steve Carter
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| posted on September 4th, 2010 at 05:04 PM |
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Hi
I don't know if you need a rear engine support bar, I Kafer Cup brace does a good job on my sons 1303 to stop wheel hop.
Steve
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fullnoise
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| posted on September 5th, 2010 at 10:17 PM |
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You can put more weight on the front wheels by lowering the front and softening the front and allowing the car to transfer weight to the front when
you brake and turn-in. Stiffer rear springs should resist the weight distributing back to the rear under acceleration. Or something like that.
My 2 Yen
esratrams
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modulus
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| posted on September 5th, 2010 at 11:32 PM |
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| Quote: | Originally
posted by mactaylor
instead of adding weight try to redistibute weight, like [...] moving motor and gearbox forward.
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Does this result in extra angulation through the CVs and more stress? How far can you practically move the engine/transaxle without excessive CV wear
for a race car?
Just curious,
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mactaylor
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| posted on September 6th, 2010 at 07:22 AM |
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just think of a standard height bus and the angles they run. they stil get great life out of cv's. it might be a compromise but any time you move
weight to the centre of the vehicle the less reactive it swings on its CoG
EVERLAST CONCRETE TANKS
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HappyDaze
A.k.a.: Greg Mackie
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| posted on September 6th, 2010 at 07:52 AM |
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Have a look at some of the off-road racers. They modify the CVs to give incredible angles.
I'd rather wear a Beetle out by racing it than by polishing it!
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 matberry
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| posted on September 6th, 2010 at 01:07 PM |
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Moving the trans foward doesn't increase any cv angles, unless the trans goes more than 3" or so, as the trailing arms make an arc foward, max angle
is at suspension travel limits, moving trans foward will introduce some angle at the point where the cv's are horizontal where normally there is
none. It actually improves the angle when massive 5' and bigger arms are used in some cases.
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE
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colin
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| posted on September 13th, 2010 at 04:09 PM |
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| Quote: | Originally
posted by fullnoise
You can put more weight on the front wheels by lowering the front and softening the front and allowing the car to transfer weight to the front when
you brake and turn-in. Stiffer rear springs should resist the weight distributing back to the rear under acceleration. Or something like that.
My 2 Yen
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Yes you can redistribute weight to the front of the car ie battery.
But CT nailed it, tune the car to your driving style, remember it,s a whole package your chasing not just front end grip.
Cheers Col
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