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Discussion summary
YOUR RESEARCHAlignment/Ride Height question- C4s/Ohlins/gt2 wheel size
Leading reported evidence
Run lot of autocross's and it really helped my times
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I run a lot of autocross's and it really helped my times.
Leading evidence: 'Run lot of autocross's and it really helped my times' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Run gt2 sized wheels/tires i might want' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Performed · outcome unconfirmed · Original poster
So I took my new Ohlins R/T (with the Elephant racing upper plates) to a shop I've used before for other cars (not a porsche indy, but a motorsports indy) and had them replace the Lower Control Arms (with Elephant adjustable LCAs) and drop links while they were in there (to get rid of some front end noise looseness), and asked them to go ' agressive street ' on the alignment using gt3 specs as a starting point and they totally messed it up.
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Suggestion · Original poster
Also it seems like since I'm running GT2 sized wheels/tires I might want to go with those alignment specs.
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Performed · outcome unconfirmed · Original poster
So I took my new Ohlins R/T (with the Elephant racing upper plates) to a shop I've used before for other cars (not a porsche indy, but a motorsports indy) and had them replace the Lower Control Arms (with Elephant adjustable LCAs) and drop links while they were in there (to get rid of some front end noise looseness), and asked them to go ' agressive street ' on the alignment using gt3 specs as a starting point and they totally messed it up.
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion · Original poster
One question I have for you all is the ride height specs I've seen all use measurments from the axle, which is super hard to do when the car is low, but more importantly they all show a different height front to rear- dumb question but i assume this is because the way the chassis parrs sit in relation to the body means these settings will result in a visually level car, no?
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So I took my new Ohlins R/T (with the Elephant racing upper plates) to a shop I've used before for other cars (not a porsche indy, but a motorsports indy) and had them replace the Lower Control Arms (with Elephant adjustable LCAs) and drop links while they were in there (to get rid of some front end noise looseness), and asked them to go ' agressive street ' on the alignment using gt3 specs as a starting point and they totally messed it up.
I'm doing some more research before taking it back to them to fix it. One question I have for you all is the ride height specs I've seen all use measurments from the axle, which is super hard to do when the car is low, but more importantly they all show a different height front to rear- dumb question but i assume this is because the way the chassis parrs sit in relation to the body means these settings will result in a visually level car, no? Mine looks jacked in the rear, and the wheel -> wheel well gap is 10mm higher in the rear.
Also it seems like since I'm running GT2 sized wheels/tires I might want to go with those alignment specs. If these are correct they seem more like what I've run in the past on agressive street/track cars. I imagine the wider tires are more impactful on what alignment to use compared to the 2WD vs AWD difference..
https://www.6speedonline.com/forums/...-attached.html
I put PSS10's on my 4S and lowered it to GT2 specs, 118mm front and 133mm rear. I then had the alignment shop align it to the stock GT2 numbers. The car handles very well and looks great. I run a lot of autocross's and it really helped my times. I use inside calibers to measure the height. Hope this helps.
These cars really work better with some front to back rake dialed in. The rear wants to be higher than the front. My heights are 105mm front/130mm rear and it's fantastic. That's about 1" higher in the rear.
The height is measured at a specific place on the chassis and they r not on the same plane. The numbers r not relative to each other but the location ueasure from. Tire sidewall height will also effect fender gap.
Stock Ride height and measurement location.
Stock Alignments
Get a Bentley book.
I went with ROW Sport. My take is that unless I know enough to know better (which I don't) and need something custom (which I don't), then the stock options are probably pretty good.
Edit: Noticing that you have adjustable LCAs, so I expect wanting to go lower, and with GT2wheels (what size is that). Maybe you are in the realm of 'knowing better' and 'needing custom'.
With the 4S/Turbo suspensions it's quit common to lower to GT2 height and use those alignment numbers. Many of the guys over on the Turbo forum have gone this route with good success and a lot of track time to back it up. If you plan on doing any performance driving the stock cambers are not enough, even the stock GT2 camber settings are not enough. I went with the stock GT2 settings as I am not yet hitting the track,(think tire wear for the street) but like I said I do a fair amount of autocross where it does help.
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