jbrob007

If you had a Porkenized 86.5 you'd be real close to 300 hp! Just installed Ken's latest performance chip set, 4.0, and the car runs like a bat outta hell and its still got all the interior pieces / parts...

Dennis K

Well done Brian. You've become seriously fast. That's a great lap time! An LSD makes a huge difference, doesn't it?

IcemanG17

Joel
The bummer is I can't run a 32V engine....my SDS digital ECU can't control twin dizzy...only singles :>(

Dennis
The car is SO MUCH BETTER.....and there is still more tweaking of the alignment to go....I still have far too much toe in out back....The ride height is a bit tall too...but it did reduce my camber to even out my tire temps (was 40F hotter inside before at 3.5' front) I would like the car to be a little looser (your style!!)

The trans shifts like butter....super smooth & the LSD is TIGHT....plus it works....I can go full throttle at about apex of 14, but the car is accelerating so hard I worry about making the exit of 15.....you can hear it in my videos or watch me slide out towards exit....

After looking at my data...I was hitting near 1.7G in spots.....but I still need to take 1 much faster....I am loosing big time there nearly every lap...I also need to work on getting more G forces in braking since I am only braking at maybe 1 g

Lizard928

If you're lowering the car below stock ride height, then you really need to be installing a bump steer kit or your handeling will be reduced.....

but that really looks like fun!!!

IcemanG17

whats funny is I have ran the car as low as 85mm.....and I have NEVER experienced any problems with bump steer.....even though I bottomed it out many times that low.....

I ran the Estate at 120mm front and 150mm rear and it handles quite well... Casper is much stiffer so it can go lower.... I would guess I'm above 130mm front now and probably 160mm rear....

poc62

great job! less brake more gas! you will go faster.

Joseph Fan

928mac

Awesome videos Brian.

Thank you for the thrill. Ha Ha I was sitting on the couch leaning in the corners as you went around.
LOL I hope I helped

IcemanG17

If it only was that simple Joe

Brad.....you gotta get out there......I hope I can inspire a few of you to give it a try, like others before me did (Dennis was a horrible influence, Kibort-Anderson-Fan) Those few laps I did with Dennis way back in 06-07 really convinced me to buy-build a 928 racer....while it was a learning experience that wasn't cheap at times, nor easy there is no regrets!!!!!

The one thing I have learned in all these years tracking-racing 928's is it can be done on a modest budget & you still end up with a fast car....at least faster than a Spec Miata, Spec E30 or Spec 944

928mac

Thanks Brian;
The problem is that I live 5.5 hours from the closest track.
I would love to be down there with (Sean from Edmonton) testing the limits of me and the car.

Brad

mark kibort

Ive been running 110mm and slightly lower for many years now. usually the handling is not really effected with the settings we use. one of the reasons is that when you are at full g loading in turns, the inside tire is not really touching the pavement and doing much of the work, but if its a long turn, you are right, (Like turn 9 at willows) where you can scrub the inside edge of the tire from a toe differential. otherwise, its a non issue for our cars on smooth tracks. 110mm front is optimal for a race car. ive driven both joes and marks cars with bumpsteer effects taken out, and there was no real difference in handling.

you look lke you are more like 110mm front and 140mm rear.. not far optmal. any more and you will have an issue with scraping down the corkscrew at laguna and certainly the turn 5 hill at thunderhill. lower the better, rubbing is the only downside!

IcemanG17

MK
Actually the car ended up MUCH higher than my avatar (95mm front 140mm rear).......take a look at this pic
http://www.gotbluemilk.com/web120921...s/image30.html

Its 140mm front and 175mm rear....far too high

mark kibort

brian, you say its 3 seconds faster, but we all know that just a LSD wont give you that much. i remember putting mine in the street car at Laguna seca. (going from the early box to the 85 with LSD) and the times went from 1:46s to 1:45s (the 928 street car with 240rwhp)
if you have a side by side video comparison, it would be interesting to see what changed , really with the two laps. was the suspension set up better, along with the new shocks and springs? sounds also like it could be a tire change, as you are using slicks, and that makes a big difference over DOTs, also changes between sets.
driving looks really good by the way. dont you like having your hands in one place now. I love all the excuses a lot of drivers make when they start racing and are asked to plant the hands, but eventualy, all the good ones, change and your driving is showing the extra control and reactivness.
good stuff. cant wait to see you out there in a SCCA race! Im shooting for that laguna NCRC race later in the fall. lets coordinate. maybe i can get scot out there for you to dice with . heck, he might be in trouble !!!

mark kibort

the pic doesnt look too bad. its compressing and lowering nicely and not with a lot of roll, so its working well. im sure it would be even better lower. i think yoiu might have been too low before and could have been slamming the bump stops, this would make the car handle funky too. (loose and push on some of the more dramtic turns)

IcemanG17

MK
The tires are the same as last time, Pirelli slick scrubs 275/645-18....the changes are:

1: The LSD works
2: I can shift gears, before I used ONLY 4th
3: All 4 shocks were rebuilt, fronts were revalved to take 800lb springs (600 before)
4: Ride height before was either 95-105mm front and 140mm rear....now 140mmF 175mmR
5: Front alignment is about right with 1/16" total toe out, rear is wrong with 1/4" IN

Here is another pic of compression at 140F-175mm rear
http://www.gotbluemilk.com/web120921...s/image28.html

My plans are to bring the car down to 120mm-150mm, set front toe to zero to 1/16" OUT, set rear to zero to at most 1/16" IN.....

I might get out on Friday with Trackmasters.....to finally set everything

IcemanG17

Right now the car has a high speed push....it is understeering to about the apex of T8 which is why it takes me SO LONG to get back on the throttle...I hope fixing the rear toe to zero will improve the turn in so I can either take it flat, or close to it.... Its also understeering a bit in T1.....everywhere else I can use throttle to reduce it....