canaus

I may have this thread in the wrong forum but bear with me a moment. Did the 928 v8 motor die when that car went out of production? Or is the 928 v8 related to any other later model or current motors in Porsche's lineup.
The reason I ask is if they are related would the twin cam Variable cam timing ect fit to a 944 block?

Has anyone looked at this?

V2Rocket

928 motor died with the 928 stopping production in 1995.
The Cayenne/Panamera V8 are in no way related to the 928 engine.

The 944 engine was derived from the original 928 design using the same bore spacing, crank/rod bearings, and cylinder head design. There were several versions of 944 engine ultimately appearing as the 968 engine, a 3.0L 16-valve variable valve timing engine from 1992-1995.

This was the first Porsche car with variable valve timing but it was a fairly primitive setup compared to the stuff available today, where a solenoid activated in an RPM range (1500-5500rpm I think?) and advanced the intake camshaft by 15 degrees relative to the exhaust cam, for better low/mid-range power. After the cutoff RPM (5500??) the intake cam reverted to its "straight-up" position for high-rpm power. They were able to design a cam for high end power and then just advanced it to gain back lower speed driveability/manners.

FRporscheman

If you want something that is bolt-on, the closest you can get is to either use a 968 engine which as V2 says has Variocam, or try to adapt the 968's Variocam parts into a 944S2 or 944S head.

But, what does that have to do with 928 engines? No 928 had variable valve timing.

Jfrahm

There is a 928 that was retrofitted with Variocam. You can find info on the 928 forum here and the owner's website
https://rennlist.com/forums/928-foru...-for-sale.html
http://www.928sg.com/modifications.htm

If you had a 16v 944 it'd be cheaper to buy a 968 engine and related parts than to convert a non Variocam engine (IMO, if your time is worth anything). The 968 intake and MAF are pretty nice upgrades too.

-Joel.