Louie928

Harvey,
It only seems like that. Mostly I'm so slow, inept, and paranoid, I have to think things through 6 times, do it wrong 4 times, and then be dissatisfied and do it over again twice. Thanks for your illusion anyway.

Louie928

Dave,
On the dyno chart I showed, I discreetly left out the torque hole at 1900 rpm. Looks very similar to the flappy hole. Good torque at 1700 and 2000, but a sharp dip between. Bugger tuning fuel and timing during the hole period. I'm thinking that maybe an exhaust flappy to give some back pressure and disturb whatever pressure waves are causing the reversion, or whatever it is, may help. The torque dip is evident at about half throttle, but worse at full throttle. Guess it's reversion flow because I have to reduce injector pulse length a lot right there or it goes really rich. Might not be in issue when driving because its so narrow. Who goes WOT at 1900 RPM?

Shane

Yes Louie, that is a monster indeed. Are you going to take it to the next Spokane track day? Or wait till next spring? Be interesting to hear what kind of speeds you reach on the front staight now!! I was hitting 150 till I chickened out due to small "S" brakes that were fading, with only a measely 403rwhp.

Congrats I look forward to hearing it roar...

bd0nalds0n

Score one for DEVEK, they've been catching some heat lately. Never used 'em, but from what I've been able to glean from the board, if Louis is impressed, I'm impressed.

H2

Shane and Louie,
I'm curious. The only way I could get any speed on the straightaway (drag strip part at Spokane Raceway) was to hit the corner going into the straight as fast as I could, dang near breaking traction. That way I already had a pretty good head of speed up while searching for top end of 4th gear before hitting the twisty at the end. There was more than one car that zipped around me fast, even at that. Including Shane. Louie's new setup is going to take some humongous brakes it looks like....and maybe a parachute!

Harvey

dr bob

Harvey--

I've had a few lessons on this problem. The issue is how you set up two corners ahead, so that your exit speeed onto the straightaway is max. It's OK to sacrifice a little cornering speed before you get to the last turn, and get a better launch onto the straight. The payback is much higher, a function of the length of the straightaway and the improvement in speed coming out of the corner.

A few years ago, I had the pleasure of watching an in-car camera view of Kim Crumb driving a borrowed street 928 in a club DE session. KJC was present to narrate the video. Very impressive watching the 928 push a 930 around a few turns, then cruise by at the exit of a turn thanks to a better line and better exit speed. No increase in heartrate, just drove right on around. The 930 is a four-second 0-60 car right out of the box, has impressive brakes for a road car, and therefore should have a serious advantage exiting corners. It was all about when to go fast. Very Impressive!

I need a refresher course before I do any more track days. Lots of bad habits to unlearn.

Louie928

Hi Shane,
It's still a long way from roadable with no air box or filter. I won't make Spokane this fall. I should have it by spring. Hopefully, it won't be so cold that tires won't grip. It'll probably cook down the straight pretty good. Top of 4th (140) is all I can do in my S4 and that's pretty fast for me as that little kink is spooky at speed. This will be faster, but I'll have to begin braking sooner. Front straight speed is all decided back in the previous turn entry. Kieth Martin knows how to do it. If he's there, get him to show you.

Louie928

Harvey,
It's just like Dr Bob says. The straight speed is determined pretty far back. Things like how you go across the little wobble where the entrance road crosses before the last turn can make a big difference. That is determined by your exit line from the left turn before that, etc. I do have big Reds for front brakes, but my ace in the hole is that I'm chicken to go too close to the edge. The trick is to recognize just where that edge is. Sometimes the edge moves.
I think significantly more power won't really get me around the track very much faster. I'm just not a good enough driver to take full advantage of it. It will make getting around a busier time and a bit more exciting I'm sure. Kim Crumb drove my GT at Portland, PIR, a few years ago as I rode with him. What an amazing demonstartion of skill. Very smooth and never an out of control feel. No sawing at the wheel. Then I drove and he rode. He had me doing things I never would have expected I could do. Just talked me through it. Mostly the conversation was something like, "Why are you slowing for this corner? Just drive on through it. Let the tires scrub the speed". Hard to do when you know you are going to die. Get Kieth Martin to go with you if he's at Spokane. Kieth does the same thing as Kim.

stuartph

Louie


Thats an awsome engine you have


Did you sort out the problems with the dual disc clutch


Stuart

Nicole

I am now expecting more shark owners to move closer to Mosier, Oregon...

H2

I know that Louie has 3 lifetimes of projects in his head but it would be great if a 928 repair/build shop could locate in the Pacific Northwest (I think Louie once said that he's too busy having fun to go into big business). We don't have as many 928s here as in Dr. Bob's neck of the woods but may be growing. With a few cars like the Professor's on the road, I think interest will pick up even more. Even the new 'vettes will shrink away. The proof will be in how the overall drivetrain will hold up to the considerable power addition. Louie will be careful to not abuse the car with this newfound power...but it won't be easy to drive with reasonable moderation. No use getting hurt.

I decided that I'll never have the quick reflexes of the younger drivers although I sometimes attempt to make up for it with "dumb." My first run on the Spokane Track Attack scared more than a few...me among them. I overestimated my brake's capability as I went into the right turn just after the straight...at 118mph. I almost cleaned my undercarriage off with the bushes and the doors off with the trees on that turn. Later, I figured 98mph was about right for someone of my lack of skill although there were the knowledgeable who were able to hit the curve quite a bit faster than that. As Dr. Bob and Prof. Ott say, there are masters out there who have it worked out. Once I get the arm signals figured out for encouraging people to pass me, I'll give it another try.

Harvey
"Only fast and agile cars are interesting....Porsche 928"

IcemanG17

Louie
Sweet engine!!!!!!!!!!!! Looks like you have the ITB intake dialed nicely!! 572rwhp.....I think thats a record for a stroker (outside of the insane Devore strokers of old).....with more to come too.....very nice......Marc T has been coming up with some impressive strokers lately....both are over 500whp!

Do you have any pics?????????????????????????????????

Louie928

Hi Stuart,
Yes, the DD clutch works fine. The pedal pressure isn't quite as much as with the single disk, but it modulates and holds very well. It did have some roughness upon engaging right at first, but that's gone away now. The pressure plate and disks are from Marc Thomas and were "high performance" type. The discs do not have regular looking friction material. The friction surface is segmented in sections about 25mm wide and the material looks like thin cardboard. I was sceptical, but so far working good at about 100 miles all on the dyno.

atb

dr. bob wrote:


We may know eventually, I've got a similar build going for an A/T car. If I could only get some EFFIN' PISTONS. (You know who you are)

Congrats on the numbers Louie! I think you have vindicated the "old-school/all motor" school of thought.

Is The Great White Hope (Louie's GT) the most powerful (porsche blocked) road-going 928? I don't recall seeing another dynograph with these kinds of numbers. Awesome, awesome, awesome.

Louie928

No, no, no, Nicole. Mosier is an awful place to live. I would not recommend that people come anywhere close to here to live.