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Old 04-25-2019, 01:41 AM   #46
alistairolsen
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Originally Posted by iansane View Post
You talk in circles. YOU were the one that came up with an 1100kg criteria. Drivetrain layout is most definitely going to affect tire sizes. A modern base Carrera uses a 235 up front and a 295 in the back. Hell, on the atrocious front wheel drive Pontiac Grand Prix from the early 2000s GM used a 255 in front and a 225 in the rear. Concessions have to be made on some cars.

I don't think you're going to find a lot of "proven data" other than hearsay and lap times with regards to the e30 chassis and max tire size choices. Up until recently this was a cheap chassis to race. Cheap racers go race and see what works and what doesn't.
No I didnt, I pointed out that an E30 weighs 1100kg, nothing more. Someone else said there were a lack of similar car for comparison, which I agreed with, but looking at a range to either side of that weight still provides a general trend.

I'd firmly doubt a Pontiac Grand Prix has a weight distribution anywhere near 50:50 and the driven wheels are at the other end. Most front drive hatchbacks run a square layout. The question raised was the comparison between front, mid and rear engined and in small cars, thats a question of whether the driver, seat, pedalbox etc sits in front or behind the engine, the outcome is still generally very close to 50:50.

Indeed, hence asking what people have found to work. The answer to my original question need only have been "I ran 215s last season and they overheated" or "I back to backed the same brand of tyre in two widths and the 245 was faster" - but no one seems to have that.
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Old 06-15-2019, 01:33 PM   #47
330icrazy
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Here is the front with 99 m3 front control arms new e30 ball joints pressed in. Z3m strut assembly with is stage 3 race springs and lower drop hats. No spacers. All new sway bar bushings and hardware.

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Old 06-16-2019, 07:45 PM   #48
BlastedBilly
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Originally Posted by 330icrazy View Post
Here is the front with 99 m3 front control arms new e30 ball joints pressed in. Z3m strut assembly with is stage 3 race springs and lower drop hats. No spacers. All new sway bar bushings and hardware.

Sent from my Moto G (5S) Plus using Tapatalk
Are those the et21 style 32s?

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Old 06-16-2019, 08:27 PM   #49
330icrazy
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Style 32 from a 540i 17x8 front 17x9 rear

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Old 06-16-2019, 11:23 PM   #50
LowR3V'in
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Does the front hit anything with that setup?
stock cabs and 225s the wheel is very very close to hitting the valance on mine.
i want to go to 235 later but looks like it might touch bringing it more forward.


Alittle close by jet jones, on Flickr
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Old 06-17-2019, 02:42 AM   #51
BlastedBilly
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Style 32 from a 540i 17x8 front 17x9 rear

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Yeah so I think that's et20 front and et26 rear.
Can you post more pics please?

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Old 06-17-2019, 03:39 AM   #52
330icrazy
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235/40r17 with offset cab.

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Old 06-17-2019, 03:51 AM   #53
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Looks like I will rub the inner plastic some.

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Old 06-17-2019, 01:43 PM   #54
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nice doesn't like it moves it up that much.
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