95 Berlinetta weight reduction and modifications.

Thanks! It feels awesome.

This is the first time it broke traction on the dyno (in 5th gear). So first dyno run was a burnout and hooked up second run with heat in the tires.

From a roll dropping it into second it breaks traction and throttle response is insane.

I’ll get an in car driving video.

 

I try to post enough details so anyone interested could copy it but if there's anything I can do to help let me know

At first I thought it would end up being a bit of a compromise but where it's at now is pretty much no low end loss and a lot of high rpm gain.

Trying to decide if I should bring it to the dragstrip as it is or put a taller rear tire on it. As it is I might have to shift into 5th in the 1/4 which isn't ideal.

 

Never fun to post results of things that don't work out great but here it is.

Last time at the dragstrip my car ran 12.45 at 116.83 at 3,150lbs with me in it and 340rwhp 250rwtq. 92.34mph at the 1/8th mile.

To achieve this I launched it and slipped the clutch off the line at 7000+rpm.

Now it's 2,980 with me in it and 390rwhp/268rwtq.

First run tonight I heat the tires and think, I'll take it easy and slip the clutch out at 3500rpm. (it's a custom sprung hub disc with organic on one side and miba pucks on the other)

Light drops, I slip it out and I'm trying to figure out if it's tire spin because I'm going nowhere. Grab second and it feels like I'm in neutral pedalling the throttle. Yep, just incinerated the clutch. I put in in 4th and for no good reason floor it and finish the pass. (it didn't slip the clutch in 4th starting at low rpm).

So here's that time slip, embarrassing as hell and made me want to kill myself. Car 812 of course.

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So I drive right back to staging to make another run with the thought I'll try even less rpm.

Even launching at 2000rpm it initially slipped the clutch, I lifted throttle and rolled back into it in 1st and it felt good but shifting fast into 4th, blowing through the clutch again.

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Had one more run after this that sucked so bad I threw out the timeslip. (I was next to a super loud drag car, lost concentration and missed a gear).

At this point it's basically a total fail and I was about to head home but I thought, I'll try one more launching it literally right off idle.

So here is a sad clutch drop at 1200 rpm and trying to be easy on the shifts so it doesn't continue to liquefy the clutch.

1/8mph is down from previous run because of no rpm at launch and no idea if it could have done better mph wise as it was on the rev limiter I would guess for a second before the pass was completed.

Overall sucks balls but I learned that I need to find a better solution for the clutch and it would benefit from better engine management if only for the reason of raising the rev limiter to 9000 or so.

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Thanks. Have to do a standing start at the dragstrip but it's no big deal, I'll be able to get the clutch to work. I'm thinking probably better off with stock organic material on both sides and just a new pressure plate.

 

The et yes but I think CS is less mph

 

This shows CS at 12.4 at 114mph with a 3000rpm launch

https://www.caranddriver.com/reviews/comparison-test/a15133465/2004-ferrari-challenge-stradale-vs-ford-gt-porsche-911-gt3-comparison-tests/

This puts it at 12.53 at 114.14

https://www.motortrend.com/reviews/2004-ferrari-stradale-porsche-gt3-2

 

And still not the easiest to pull off at the track.





(12.5 @ 115)

 

Yeah that's why I was posting dragstrip videos, a bit more tricky when the surface doesn't allow for much tire spin off the line. Very small difference in results I'm sure but 1312ft vs 1320 and no mph.

I was thinking about getting a dragy. Could then test on a similar road.

 

Sure if it actually weighs what the manual says and again no mph.

Already said I basically considered my run a failure and have no doubt a CS could run 12.1 with a good launch and not off idle. Point is the MPH is what shows potential, the ET can change vs launch aggressiveness.

If one car traps 114 and the other almost 120, the latter would be quicker accelerating with the same launch. I'll prove that, just didn't happen this time.

 

Yes that's why I'm mostly looking at dragstrip results vs Ferrari manual or wikicars, just something observable with a timeslip. Not considering the surface but even the differences in measurement.

Dragstrip has two beams at the end of the track 66ft apart recording average speed rather than just measuring actual speed vs distance.

So for instance this shows ET pretty close but Vbox showing higher mph than the track timing system.



I'm not trying to build a drag car of course, just curious what it can do.