Mark Anderson

Maybe those larger rear brakes will work for you but it didn't for me, even with my F50 14" brakes up front. It gave me way to much rear bias

Catorce

Really? Did you use an adjustable bias controller?

I wish I had talked to you about this before I bought them, although I can use them for another build.

So as far as I know the car has S4s in the front.....would you use S4 rears as well, or???

Also, the car has a Tilton cockpit adjustable valve if that helps. Thanks Mark

Catorce

Update:

Spoke to Mark, who advised against the larger rear brakes, so ordered some S4 cores for the rear.

Oh well, interestingly, the Turbo Targa came with no rear brakes (seems to be a pattern on projects I buy), so they are not a total waste.....

THANK YOU MARK!

Chris Lockhart

Nice write-up on re-sealing. Glad they won't go to waste.

Catorce

^ yeah and shameless plug for Mark who is having a half off all used parts sale until Xmas.....the new S4 cores were cheaper than the brake pads!

Catorce

While I wait for parts, I wanted to revisit the sway bar / handling characteristics thing we were talking about.

For those that don't want to go back a few pages, I opined that a full hard sway bar in front and a full soft (or no) sway bar in rear was a cure for oversteer as far as I know.

Opinions? Comments? Why does the car have so much oversteer in its modified state?

James Bailey

really more questions than answers but most gutted "race" 928s are nose heavy , most run wider rear tires and wider rear track, all have various spring rates ( perhaps too stiff) , Anderson's last car had modified front spring shock location. Note that his prior car was fitted with your same wide body front....he ldismantled that one but sold the chassis. . Your wider front track (than most) changes so many things too.
. Anderson in my opinion tended to drive around any handling shortcomings. So your car now is unique and totally untested the only way to really sort it out is at a track .
. Obviously your Autocross set up will be different than that for the big tracks. You may like using some over steer either power induced or by lifting to rotate the car in slower tight corners.
​​​​​​​. If you want to be inundated with comments go over to the race forum where Kibort is still allowed to post.

Catorce

Jim,

Great insight here. You just brought up the untested part, which I had only half been paying attention to. That is a MAJOR factor in this build. I am sure Devore knew what he was doing to some extent, but he never got to actually TEST his theories.

As Mark said to me the other day, there will be a ton of things to fix and adjust even after the first drive, which confirms to me that AX is the best place to start even just to make the car a runner.

For sure it will behave different on the track; any car can be a champ at under 60mph......

dcocci

I think the stiff front/ stock or no rear swaybar combo will work well. I also think the car will put a lot of load on the rear tires because of the weight transfer from side to side, but then again alot of horsepower will do that too so whatever haha. If its anything like my z, it will be a little more dependent on good tires than other cars.

Cheburator

Because you have pinned the Weissach. My car is the same and it feels like an old BMW E30 - it turns using the throttle rather than the steering wheel. Not necessarily a good thing, but not a bad thing either.

Catorce

Very interesting.....but it my understanding that a functioning Weissach isn't compatible with ultra wide tires????

I don't mind the throttle steer. The Camaro has that characteristic; Could controllably drift around a complete autocross course in that car like Ken Block, LOL.

Mark Anderson

Joseph never pinned his and I think his car was always easier to drive than mine.

Catorce

I think he had OEM rubber bushings throughout, correct? As far as feeling easier to drive, that's cool, but do you recall if you were as fast lap time wise in the yellow car as in the white car?

Mark Anderson

Joes car was always a bit slower but there were many factors. Mine did weigh about 100 lbs less

still I'm only talking a second a lap or so.

James Bailey

Joe also tended to buy more sticker tires as I recall rather than buying other teams Used tires.There are lots of urban myths when it comes to 928s "race" cars...

The Bud Hart / Devore project was I believe designed for open road high speed rallies and thus the huge fuel cell, less emphasis on weight reduction or ride heights. The 90 mile Silver state Classic for example has three turns.....the infamous Narrows. .I drove it in a dually with trsiler and GTR inside the last two years

.I always wondered if the much bigger frontal area made sense ??? Or a big rear wing . But still a fun project, Even if race cars are NEVER done !