Evil Patrick

I'm more than happy with mine. It's always a blast to drive. There are very few
cars that can keep up. Very few.

The OBVIOUS reasons for picking a Porsche 928 is that you get:

* the beautiful Porsche 928 body
* ~50/50 balance
* the beautiful Porsche 928 body
* phenominal handling (thanks Weissach!)
* the beautiful Porsche 928 body
* gear ratios that allow a 200 mph excess
* the beautiful Porsche 928 body

and, of course...

* the beautiful Porsche 928 body!

--Patrick
79 (with a 50's designed, pushrod, iron Chebbie - 86 rebuilt posi 5-speed,
90 GT coilovers, S4 on all 4 corners)
82
84 (for sale, cheap! make offer!)

FBIII

That might be the craziest thing I have ever seen! When Tony asked if anyone had a picture of it I thought he was nuts. That engine should be used as the poster child for: "I had a dream," or "where there's a will there's a way." Unbelievable.

Jon B.

Sorry to bring this back from the dead, but I couldn't let this fly. Do you actually think that the 928 heads flow better than anything Chevy or Ford has to offer? If you ever looked at the Projekt 928 page, they had pictures of stock 928 heads and they were basically BARE castings. Not the thing for making power, or having serious flow. I might just be blowing smoke, but I could bet that a stock 928 DOHC head couldn't hold a candle to what a Ford DOHC head is capable of. The stock '03-04 Cobra heads handle about 800hp. I've never seen a 928 CLOSE to that number. EVER!

Jon

john_h.

<The 928 is more "car" than "engine">

The first thing that grabs you is the looks.
Then the handling. At 130 mph!
around curves, very steady.
Engine does fine at high constant speeds
sounds like an airplane turbine or something!
but when slogging through town.... no torque.

Love this car, had started a new thread about turbo or SBC, and then I read the great comments on this thread.
hmmm.
will probably stay with what I have got (87 AT) and look for a SC or Turbo kit rather than do a US engine conversion.
The new Corvette has the torque, and that may be something in the future,
but the S4 turns heads, is an absolute classic (I like the 2005 comment) and just purrs.

SharkSkin

And where were those cobra heads 19 years ago when the S4 was introduced? I'm not trying to say the S4 head is the best head ever. This guy wanted a pissing match and I got a little upwind of him is all.

slate blue

I agree, he doesn't know anything at all, these (928) heads when modified can flow huge air, both the 2 valve and 4 valve, my 2 valve head at 0.600" lift could flow more than 600 hp and the 4 valvers can flow in excess of 700 hp maybe up to 800 hp depending on the lift. He hasn't taken time to research this, come in and shot his mouth off.

As a point of interest my 2 valve heads outflow Airflow Research aftermarket chevy heads. Yes the Nascar stuff is better but that was it intended purpose, you wouldn't want to use those heads on the street, they would be real dogs.

Cheers Greg

Malibu310

I have a Buell S1 Lightning (1987)... When a 12,000 RPM Crotch Rocket pulls up next to me and I race, I can either keep up with them or beat them. I never pull more than 5,500 RPM. They need to be in the upper RPM range to keep in the power band, similar to the 928 engine. To see the Buell race and hear the engine is weird. It sounds like a slow moving farm tractor - thump-thump-thump but accellerates like a rocket (what you hear and what you see is two different things). It's that torque you feel at extremely low RPMs that is like getting hit with a hammer without ever having to push the engine hard. It's also like that on our 355 cu.in. chevy blower motor in our 928. You never have to go over the speed limit, nor come close to pushing the engine to enjoy the sensory surge of power. We will never see more than 6,000 RPM, but then we never have to go that high to obtain performance.

BC

I like that intake. Separate box and runners. Very long runners. Shorter runners would do well I think.

Jon B.

Pretty sure I didn't say anything about a modified head. Sharkskin, I figured you were saying that Ford or Chevy didn't have anything ever, didn't realize you were talking to the guy about using something from that era. 19 years ago is probably not the best time for a SBF or SBC.

Hey Greg, why don't you look and see what a MODIFIED set of DOHC Ford heads can do before YOU shoot your mouth off. I was talking about the regular old off the shelf thing, nothing tampered with. I'm sure the 928 heads can flow a bunch too, but being that the heads i'm talking about were designed in the new millenium, i'm gonna say they are a superior design. I obviously knew something, considering I referenced the Projekt 928 page, which is where I got my information...good job on that one.

Back to the actual thread topic, I don't see why a LS2 wouldn't be a great addition to an older 928. I agree that it would (for obvious reasons) decrease the value of basically any S4/GT/GTS. But, considering that you could have a motor that would make in some cases almost twice the power AND do it reliably, I would absolutely think about it. Plus, since some of the 928 owners have the power bug, a "massaged" LS1 will put well over 400hp out with a simple H/C/I swap. Those AFR heads that the Porsche head can outflow are one of the better heads that the LS1 guys have. I'm pretty sure if you find a car with those heads on it and wanted to play with the guy, you might change your mind on the power those things make, and the lack of it in the 928. I don't see where this reliablilty issue came up on these newer Chevy motors, there are people other than Porsche that know how to make power and do it reliably.

Jon

Jon B.

Agreed, I think that might be why that thing made the torque it did. That motor sounds like a stump puller.

Jon

Jim bailey - 928 International

The BIG BLOCK chevy with 4 valve 928 heads made huge torque BECAUSE it is a big block 450-500 cubic inch , maybe 8 liters ! and it was running STOCK 928 cams. When ever you make an engine bigger the effect is stock cams become more mild and make more torque less potential top end horsepower. I believe he is fitting some aftermarket grind cams in search of more horsepower.

SharkSkin

Look at the context. The owner of that roadster handed me a line of **** and I handed him a line of **** right back. I never intended it to be taken for a "correct" statement, and as for what he said, I can only speculate as to whether he meant it or not. I will tell you though, that we both chuckled about the exchange and that was the end of it. I have the utmost respect for his craftsmanship and told him so.

Imo000

You are trying to compare a N/A head to a forced induction one. How is that fair? A better comparison would be to compare the N/A 32V Ford head to the 32V 928 head.

The newer Cobras came with a SC from the factory, so the entire engine was designed to be boosted. How well does the Cobra head fairs in a N/A application? Do they perform as well as the 928?

Jon B.

Good point, but as far as I know, all of the '03 Ford DOHC heads were the same. The Aviator/Maurader/Mach1 and the mighty Cobra had the same head. The camshafts might have been different, but i'm almost positive the heads are the same. They are vastly different than the earlier DOHC heads though. If you had a '99/01 Cobra and didn't want to port your stock heads and wanted something better, a '03/04 head is the thing for you. It is basically the ultimate DOHC Ford head, besides the Ford GT head, which is the final revision of the '00 Cobra R head. The Cobra was designed for boost, but it was basically the lower half. They put the best flowing head they had on it and went. The bottom end is impressive though, Manley rods, forged pistons/crank and an iron Block. I think it's pretty heavy actually, something the LS series Chevys are not.

Jon

Malibu310

Here is a word of caution... when building up an American V8, the industry is very stable... most of the upgrades are tried and true and you can find many extremely high horespower engines backed by a warranty. Our 600HP chevy had its crankshaft broken due to a defective balancer... the engine was under warranty! My other Chevy motor has not used any oil in the first 3000 miles and I've driven it aggressively... are the Porsche 928 upgrades backed by full warranties? I just bought a professionally built 88 inch Buell S1.... A valve hit a piston and lunched most of the rest of the engine... no warranty! Now I'm replacing the engine with an S & S 91" race engine backed by a warranty. Just something to think about...