Lizard928

Over the years I have worked on many cars, and have seen a ton of carnage.

But I have always been impressed with the 928 motor, and the quality of parts (coating of the original cam gears an exception).

I have seen a car with a stage III SC kit on it have an inop IC pump leading to stupid high intake temps, along with a bad MAF that was creating more pings within a few seconds than an entire ping pong tournament. It went to two or three track days like this. It did have higher oil ejection because of this, but the only thing that happened was that the head gasket popped out on cyl #8. No other damage could be found. Most cars this WOULD have been a melted pistons or 8.

Then on my own car I had installed cams, and boosted it (low), and after 8 months of boost and hard abuse I started to have a valve that wasnt sealing.
I ended up having to put around another 1k miles on the car with the valve not sealing. It had a rough idle because of this, but that was about all. I then parked the car other than driving it in/out of the shop. I finally got to it and pulled the motor and the offending head (doing both). I looked at the bottom of the valve and couldnt see the hole that a burnt valve/seat would have. So I pulled the spring and found that the inner spring had broken. So it probably had only about 50# of seat pressure. Yet when I pulled the valve out and inspected the valve seat face, there was no damage. In fact, a simple lapping would probably bring the valve back into perfect commission. In a normal vehicle, even if it had been just a broken spring I would have had a burnt valve just from the amount of miles I put on it after having the original problem.

Anyone who says that these motors are not strong has never opened on up, or seen what happens in other motors with lower quality parts in them!

Nuen Werke

I know I love it when I hear these engines are weak or only good for 400 HP.

JohnInTexas

Sure is a good thing the engines are strong because it's a booger trying to do anything under the hood. I never saw so much machinery crammed in such a small place. I had a minor leak from a PWR steering hose connection and like to never got just the right angle to get my hand AND the screwdriver in there to put a little more torque on the clamp.

JohnInTexas

Has anyone put the 928 engine in a lighter vehicle? The 928 S4 curb weight is 3,660 pounds....the weight of the Porsche and the 50/50 distribution is part of why it handles well and I have no complaints but just think of the eyebrows that would go up if you put the engine in a lighter frame.

bronto

I remember a project someone had of putting a 928 engine into a 914.

Lizard928

yes one fellow has a 16V euro in a 914, as well there is a tube frame boxster with twin turbos, as well as a 944 with a NA stroker pushing silly horse by kelly moss.

hacker-pschorr

When I win the lottery I'm going to buy a 1995 ZR-1 and a 1995 GTS and swap the engines.

ptuomov

I am going to blow one up tonight if everything goes according to the plan.

Hilton

Video!!!

Although I suspect you'll be disappointed and it'll resolutely continue to put out insane power.

Doug_B_928

See here:

SeanR

You've been trying for a while now. Are you going to add a bunch of timing tonight?

Amen, video please.

I bet that engine just smiles at him and laughs.

IcemanG17

I agree that the majority of the 928 engine design is VERY good.....however it does have some glaring weak points..........

1: How Porsche de-engineered the oil system over time....the early pan was VERY good, the later ones are horrible
2: Oil pump-flow. It is a bit on the excessive side....do we really need 100+psi and 24+GPM flow rates.....I really think the early oil pump I have on my racer is a BENEFIT....

Rob Edwards

Kevin Johnson notwithstanding, all pans are the same. (Yes, I'm being pedantic...) Doing away with the early screen and petals was likely a step in the wrong direction.

tv

928er

I would love to get my hands on one of those.... I think they were called the worlfburg editions....