DougM

I am making some progress pulling stuff off. Had a few hangups. Just had to pick up a 5' piece if iron to get leverage to break the crank bolt free. Now I need to rent a puller to get the balancer off.
Reading through this, I wonder if I did internal damage.
Engine number is: m28/21 82E 00528
Heads are 928.105.251.1R
Messy...

hacker-pschorr

This has been floating around for a while. I started a larger chart that included engines and other specs, no idea where I put it.


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tilac999

So before mid-'84 you're safe. Right?

DougM

That is what I am wondering. If so, I may just get it all cleaned up, put the timing belt back on and run a compression check.

mark kibort

there you go. near .5" of lift, and with euro 85, you have .2mm of contact. not good. but with 82, you have no contact,becuause the pocket is deep enough to handle .5" of lift

993turbo

Provided that the engine is stock (stock pistons / cams) you should have no internal damage.

993turbo

Great info!!! Cheers! Saved me some time on the dial guage.

DougM

So what is the true HP and torque of this motor assuming internals are stock? I guess it is not really like the '83 down, but doesn't have the higher compression of the '84 up?

Also, I guess I will clean it up, put a belt on and run a compression check to verify. I may also get a boroscope and fish it down some plug holes and have a look.

Hilton

It should be at least the factory-rated spec. of 310hp flywheel - Porsche didn't usually lie about their power output (at least on the downside).

Which would explain why some of the stock 85 16V cars I've seen on dyno's put down such large numbers (similar numbers to stock S4's with no knock/hall faults). With their higher compression, they're probably pushing a chunk more hp than the early 84's.

I still want to own a decent '86 16V at some point.. the car with it all - earlier style, S4 brakes, high compression revvy 16V motor etc. Just need to find me a no-sunroof 5-speed one

txhokie4life

you should be able to do a compression or leak down test and know pretty quickly.

m