Rally2003's Build Thread

Finally decided on a wheel size for next years autoX Just need to save up a little more moola for them. Enkei RPF1's 17"x9" +22 I just can't decide if I want to run 8" or 9" wide wheels in the rear. I either want 275F/R or 275F w/ 255R. Choices hmmm....
 
Yep and the motor really downs't have any raw power so I'll stick with the lil guy.

I hate SM rules for SCCA. They'll say one thing then in the next paragraph it will contradict what it just said. WTF! No I don't know which one to follow and it determines the limits of the body work for the MSP. I posted something in my SCCA forum so hopefully they'll chime in on the situation and clear things up.

I'm in SM/SMF and the rules there say:

I. Front hoods (engine covers), engine covers, trunk lids and hatches
not containing glass, front fenders, rear fenders not part of chassis
structure (unibody), front & rear facias, and side skirts may be
modified or replaced, and may be attached with removable fasteners.
Associated hardware including latches, hinges, window washer
nozzles, and hood liners may be modified, removed, or replaced.
This does not permit removal of the remainder of the window washer
system. Fenders may be flared as per Street Prepared. Non-metallic
fender liners may be modified, replaced, or removed.

Then when I look up SP flared rules it says:

A. Fenders and bumpers may be modified for tire clearance. This includes
the portion of a hood which serves as a fender/wheel well,
where applicable. This does not permit modifications to the chassis
or bodywork inboard of the vertical plane of the hub/wheel mounting
face (at rest, with front wheels straight ahead). Flares may be added
although tires may extend beyond the bodywork. Replacement of
complete hood, flared fenders, or quarter panels is prohibited. Plastic
and rubber wheel well splash shields may be modified for tire
clearance and for installation of fender flares as allowed herein.

It says two different thing about the fender and they contradict each other. I was looking into wider wheels for the front and rear then found out I can't modify the rear because it is part of the unibody, but can it be flared? Then I was going to replace the front fender and it says it's ok within the SM rules, but not SP rules noted at the end. So I don't know which one to follow?
 
SCCA rules are built off the previous rule. You start with the SP rule and then build on the allowances provided by the SM rules. Does that make sense?
 
So does that mean I can replace the front fenders and have to leave the rear quarters alone? This is my 4th year racing the MSP and in SM they sem really vauge, but can be interpreted different among others. I just don't want to go to a National Event and be DQ'ed for illegal parts or usage.
 
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So after talking with a few SCCA guys, I can do whatever I want in the front, but can't touch the back because it is considered structural and part of the unibody.

Now I need to find out how big of a tire will fit under the rear quarter and offset of wheel so it doesn't poke out. I would like to lower the car more than what it was last year, but my wider tire choices are actually raising the car because of the overall increase in diameter from the aspect ratio.
 
Stance guys will tell you how wide a wheel you can fit. Unfortunately, you'd be limited to 205 series tires... lulz.
 
So after talking with a few SCCA guys, I can do whatever I want in the front, but can't touch the back because it is considered structural and part of the unibody.

Now I need to find out how big of a tire will fit under the rear quarter and offset of wheel so it doesn't poke out. I would like to lower the car more than what it was last year, but my wider tire choices are actually raising the car because of the overall increase in diameter from the aspect ratio.

Stance guys will tell you how wide a wheel you can fit. Unfortunately, you'd be limited to 205 series tires... lulz.

Notice that I said tire before wheel. I have priorities :) If I can remember right Marlon has 235's on a set of his race wheels, but I can't remember the offset of the wheel and how close it was to the rear quarter. Plus my rear end is tweeked just a little from being totaled and is a little closer on one side than the other.

I'm also curious on how the rotation of the car would be affected by having massive 275's in the front and 225's in the rear.
 
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With flares in the front, I'm confident 275s can easily be pulled off. The key is offset. Too far positive and you'll rub frame, too far negative and you can say goodbye to the flares.
 
what's the rules say about haing adjustable rear links? Might give you a little more clearance in the rear. What size rims for the 275?

You can possible do a 245/40/17 with a 55 offset
 
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With flares in the front, I'm confident 275s can easily be pulled off. The key is offset. Too far positive and you'll rub frame, too far negative and you can say goodbye to the flares.

I've been using a wheel and tire caculator to get an idea of what I need, but the problem with going to a 275 tire is that it is almost a inch taller in diameter which bring it to the point that it will touch the frame when turned all the way. I'm not worried about the flared fenders because I'm making thoughs after I know the tires will clear the frame. I'm going to have to make a mock up of the front wheel and see if it fits. If it doesn't fit I might have to back it down to a 245 :( I might just have to buy another MSP just to do all the things I can't do within the SM rules for fun :)

what's the rules say about haing adjustable rear links? Might give you a little more clearance in the rear. What size rims for the 275?

You can possible do a 245/40/17 with a 55 offset

Almost anything goes on suspension in SM as long as you are not welding points together to make them solid. It would bring the tire 20mm closer to the suspension and brakes, but should only stick out 10mm, which should be fine. The problem with that is I can't find a wheel that is 17x9 +22 for the front and 17x8 +55 for the rear. The Enkei RPF1's have the most variety in sizes and they only go to +44 in the rear which would bring it in 9mm toward the suspension and brakes (which should be fine) and push it out 21mm (about 3/4inch and that would be really close and probably rub). I'm going to have to right down all the ways this could go and do some mock ups.
 
Can't wait until the weekend to get some more done with the car. Hopefully I'll be finishing up the little wire tuck and repositioning. Then start mocking up a front tire to see if it will clear the frame.
 
Notice that I said tire before wheel. I have priorities :) If I can remember right Marlon has 235's on a set of his race wheels, but I can't remember the offset of the wheel and how close it was to the rear quarter. Plus my rear end is tweeked just a little from being totaled and is a little closer on one side than the other.

I'm also curious on how the rotation of the car would be affected by having massive 275's in the front and 225's in the rear.

What rear bar are you running? That's a good question
 

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