drnick

mark, what about your new engine? will you be running it without scrapers, oil cooler, pneumatic oil resivoir, crank drilling - and just use amzoil? if you do then you really have got big kahunas!

Vilhuer

This black art must have been lost at the factory some years later as factory couldn't build engines for 928 CUP cars which would last more than few races.

IcemanG17

It will be interesting to tear down and inspect the old holbert motor..... When the stock LH-EZK was sent in and inspected it came back pretty much normal......the cams that failed also were basically 85-86 cams, which makes sense since it is an 86 chassis..... I really doubt there is a special oiling system in that motor...it was built for top speed runs.....not track work.....so why would they go to the trouble of making a special oiling system in that one off motor?

Charley B

Boy am I gonna have a big "I told you so" when it is finally proven that the 'E-ram Electric Supercharger' is the only defense against a 2/6 failure.

Mark, we need to talk about a franchise.

mark kibort

Yep, just Amsoil and the crank drilling! (that I have no choice. The Modex crank has been drilled.)

Im probably going to shift at 5000rpms for a while (maybe for the first lap or two!)

MK

drnick

probably you are right and if you do anything extra you will temp the gods of engine failure and 2/6 will go for sure.. what about scrapers or an acusump, they both seem to help.

mark kibort

Thanks Pierre! I do try hard to make the beatings as easy as possible on the ole Holbert car. It took a long time before i really felt comfortable shifting near redline on every shift. now, i dont even think about it. plus, it sounds so good up there in the rpms!

I will say, the 928 is not the easiest car in the world to shift smoothly. I remember, after owning my 84 for 5 years before i felt like i was wearing it.
(in a BMW, this happens much quicker)

Mark

mark kibort

That's what im thinking. Just my luck, the scrapers will limit the lubricating splashing that has been raining on the bearings during race conditions.

accusump seems to be a good idea, but ive seen a few blow with them, and sometimes, it injects some other variables.

I think the only way to fix the problem, from what the experts are saying, is to drill the crank. (done on the new crank) and dry sump it. Anderson sure has not had any issues, nor has Joseph with his non-dry sumped 928 nicasil stroker.

MK

Dennis K

Grandma??

Laguna Seca in race car mode:


Laguna Seca in grandma car mode:


When I run in the wet I disconnect rear anti-roll bar and soften front anti-roll bar but that's the extent of the changes. If I lived somewhere where I knew it was going to be raining every day and could compromise the car to a wet setup for an extended period of time, I'd like to run (in addition to the anti-roll bar changes):

• narrower, full-depth treaded tires
• softer springs
• less lockup on the limited slip diff (nearly zero on decel, maybe 25% on accel)
• less neg. camber

I don't think there's anything wrong w/ 928 handling in the rain compared to other front engine/rwd cars w/ similar power & tires. Tires do make a HUGE difference. All my recent rain track days have been on worn 265/315 R-compound tires w/ only a few mm of tread depth. My entire setup is compromised toward dry since it only rains here a few months out of the year. Plus I am not racing wheel to wheel so if I'm slow, it's ok. I'm just out there trying to learn car control.

And I just wanted to mention that I admire Jerry's bravery running that race in Spa, in the rain, after rebuilding his car. Anyone who knows motorsports will know the words "rain at Spa" will send a chill down any driver's spine.

Velocissimo87

Really cool oboards there Dennis, nice stuff!

JEC_31

That was a really good run in the rain, Dennis - you've gotten even faster!

When I wrote that post I was actually thinking of the one where you were in a downpour and got passed by an enthusiastic red Esprit who then went off. That one was scary slippery.

~~~~~~~~~~~~~

Velocissimo87,
Dennis K is awesome. Watch and learn: smoothness and balance in the art of driving a black 928 S4 around a track quickly.