928newbie

I am looking into ways to make my 928 S go faster and handle better. I’m in California, so that eliminates some of the speed options. Interested in any and all suggestions, experiences, etc. Bang-for-the-buck always a plus.

<img src="graemlins/beerchug.gif" border="0" alt="[cheers]" />

mike

John Veninger

Go fast stuff,
Bang for the buck- NOS
More expensive options:
Headers, high flow CATS and exhaust
Euro intake, heads and cams ($$$)
Stroker crank (big $$$$)
Handle:
New springs and shocks (Eibach and Koni's)
Devek sway bar
Rear sway bar drop links (www.928GT.com)
Wider wheels and sticker tires
S4 brakes
The list all depends on the bank acount

Jim Nowak

The bank account will suffer dearly!



Jim Nowak

Aaron Rouse

I put Eibach/Bilstiens on my car and think it was a pretty good improvement for a street car. I also did the front/rear sway bar drop links at the same time, not sure how much those helped/hurt, but over all the car handles the roads I drive a lot better. If yours is a euro spec, you can easily put a supercharger on it.

Joe R

You guys forgot to include the cheapest go faster mod you can do. Become a better driver through drivers ed classes given at most PCA organizations. Owned my 928 for 11 years I thought I was pretty good. Then I seen what fast really is. Same car better driver.

Aaron Rouse

Joe, wouldn't that also depend on someones definition of what faster is? Only reason I ask that is because when I think faster, I think of how much more acceleration the car would have when doing 80 and you punch it or actually giving half throttle at that same speed. Now if my definition was more of how fast the car could go through a twisty course then I would bet all my money that more than a few drivers ed classes like you suggest would help me out a ton.

Joe R

Aaron I guess you are right everybody wants to go faster. Just figured that Porsches were made to turn. However I see where you are comming from. Does an on ramp with a decreasing radius turn count? I can imagine that you should have no problem in your 80 Euro smoking all them Rice Boys. Most of them guys I leave alone because when I am rolling up out of 2nd they always hit the brakes as the turn gets tight.

I do enjoy a 5 grand blast to counter act that thumpin music <img src="graemlins/burnout.gif" border="0" alt="[burnout]" />

Aaron Rouse

Actually my car dissapoints me in certain speed ranges, one being at 80mph with partial throttle. Something I have noticed is sometimes it is a lot more prone to downshift than others, almost seems related to outside temperature, the colder it is the more prone it might be to downshift without having to floor it. On the street it is very rare that I can go tearing around turns so the only times I really think I want more power is when driving down the freeway and it is not all that often the desire presents itself since I am sitting in traffic more times than not.

I try to avoid racing rice burners, I raced an Integra R-type down the freeway once and we were dead even up to 140 when we then had to slow down. I raced a later model Eclipse and about the same story as the R-type but up to 130 or so.

Jim Nowak

Aaron,

It sounds like you are having problems with your motor if either of the cars can hang with you. Or, they had some major work done to their motors. I drove many Eclipse turbo's, sold a bunch too, and none of them could do more than 140 mph and at that speed they were not very stable. After 100 mph, you should leave them in a virtual standstill.

Jim Nowak

P.S. you may want to take your car to a chassis dyno and see what you're putting to the ground. You may be running on 5 or 6 instead of all 8.

Aaron Rouse

Well, I do not think they were stock in either case, especially when I do not think a R-type will get up to that speed that quickly and same for the Eclipse. Actually I think I was not running on all 8 completely for the Eclipse, found some bad flowing injectors months after that.

Yeah, I need to put it on a chassis dyno just for a baseline pull. Good friend of mine has a chassis dyno at their shop too, of course I would never hear the end of it once they knew an exact rwhp number for my 928 seeing as he drives a Z06 making 480rwhp that you can barely tell it is not stock from the look/sound of it and they build Vettes all the time making 475-575rwhp, he likes to already rub those facts into me, some friend he is but it is all in our twisted form of humor.

Any ideas as to what my car when running right should put down for a rwhp? Would be nice to see a dyno graph for a similar car actually, all I ever see is graphs for 32-valve cars.

Mike Schmidt

There aren't any dyno charts posted, but there'a a pretty good list of dyno numbers for different years and models at <a href="http://members.rennlist.com/jkomiak/" target="_blank">http://members.rennlist.com/jkomiak/</a>

Fletcher

I also have an 84s us version. I wonder if about 210rwhp is about right? I agree all the dyno sheets I see are for 4v motors.

I plan on stage 2 headers with full exhaust for my black shark. Even at 2k for everything they (devek) claim up to 30hp at the rear wheels. That should be real close to 275h.p. at the crank. everything after that gets real expensive for any real h.p. gains. I will probably stop at headers/exhaust/fuel pressure regulator/ignition upgrades. Should have some dyno results this summer.

Weight loss is supposed to be a great idea as well. Ea 10lbs lossed worth approx 1h.p.!?
Seats and exhaust are 2 areas where you could probably shed 50lbs or so.

Fletch 84s

Aaron Rouse

I thought about doing exhaust before, but I honestly like the sound of my car with its current stock exhaust. It has a decent bassey tone to it, has been known to annoy car alarms in parking garages as is. It does not have a cat on it, but does have the "muffler" that came in that location from the factory. I also considered for awhile doing a SC with the FAST kit out there, but I really do not care for Vortechs which is what they use. In my searches for power is where I sit today with most of a twin turbo setup sitting in boxes out in my garage and plans to get back to that whenever our new house gets done and I pick up a "donor" car for finishing it all out.

I know what the factory HP numbers are supposed to be and have seen some graphs for the motor. Just would be nice to see what a similar car put down to the rear wheels, just to compare the power curves and numbers.

Jim Nowak

Aaron,

Your friend builds Vettes that make 575 RWHP? What size is the engine? What kind of blowers/nitrous/turbo's are they using? What chassis dyno are they using? Those RWHP numbers seem very high but then again I don't know the variables.

A stock LT-5 Corvette puts around 255-260 RWHP on a Dyno Jet but I've seen them tweeked to around 290 RWHP without too much work but after that it gets more difficult and much more expensive.

Not to say those numbers can't be achieved, but they are suspiciously high without knowing what they've done to the motor.

I would ask some candid questions before you believe this friend. I once saw an outlaw Camaro put around 600 RWHP on a Dyno Jet but that was a 500+ inch motor with a 300 shot of nitrous. He thought he would have around 700 RWHP and was upset that he didn't.

Jim Nowak

Aaron Rouse

It is a dynojet and the motors are naturally aspirated. I saw a 928 S4 put down something like 285rwhp on the very same dyno. He has yet to lie or decieve me about what a car puts down and really he has no reason to do that to me because he knows I am not going to buy anything from them besides little things and those are always at their cost.

The 575rwhp cars are when they take Z06 Vettes and stroke them out to 7.0L and do a ton of head work and go to a solid roller cam setup, then of course all your little things like exhaust, pulleys, computers reprogrammed and so on. Not many have made that much power, but not many people spend that much money on their cars. The 475rwhp cars are strokers as well, I think 7.0L but I am not sure if all are or are not because I have not asked tons of questions about the slower ones. I am pretty sure they are not solid roller cams in the slower ones. I do believe Don Hanson's 6.5L when it had the custom cams and stock computer made close to 500rwhp and makes somwhere around 455rwhp with stock cams or was that all a lie as well?

Now these are not the type of things I would want to trust to last through a race course, obvisouly they are built with the sole intent of max power not max lifespan or to pass any emissions tests.