87 944 C

Looking for information on it. Some say it's interference some say not, any clarification would be great.

Also where can I find parts and performance parts?

crushingday

I am unsure as to the answer to this question. I am sure someone will be along shorty to provide correct information, However I do not believe you actually " bought a 1980 Euro" as I see no pictures of said car to confirm. If pictures of the alleged car you so boldly claimed you purchased are not posted in a timely manner you will be flogged and asked to sit in a corner until you realize the consequences of you actions.

Wisconsin Joe

An 80 won't be. Even the 4.7. It's the M28/21 motor (the 310 hp high compression 4.7) in the 84-86 Euros that is the only interference 16 valve.

Parts are available from the "usual suspects." Also known as the "Big 4." You can find who I mean and how to get hold of them in the "New Visitor" sticky at the top of the forum. It's got lots and lots of very useful info for you.

Performance mods are a bit different. What do you want to do? Exhaust can use some help, but to get any real increases, you probably need to shove extra air into it (supercharger).
However, you say "euro". If it's an "S", with the 4.7 instead of the 4.5 (M28/11 IIRC, but I could be wrong on that), then you've got 300 hp available.

9two8

I own a 1980 4.7 S 300bhp car, and was reliably informed this is an interferance engine..., now whether that,s classed as a euro car or plain old UK car which it is, then I wonder if there,s a difference between the two.., although i doubt it.?

Wisconsin Joe

No difference. Your "UK' car is a "ROW" (rest of world) or "Euro".

I could certainly be wrong. But I was under the impression that it was only the 310 hp 4.7 in the "S2" that was a "valve bender." This is, of course discussing 16v motors. ALL 32v are interference.

87 944 C

Non S euro so 240hp rating. Which I think we all know porsche underrated their cars across the range.

I will check the aforementioned sticky note.

87 944 C

ROG100

I am one of the school that all ROW 16v 4.7L engines are interference. Early 77 to 79 4.5L is not. However with the higher compression ratio of the ROW 4.5L 80 to 82 - 10.0-1 these cars may also be interference.
Better to play safe than be sorry.

HP should be 229 on this car and not 240 by the book.

davek9

I've see an '85 310hp 16v Euro bend valves when a WP let go from deferred maintenance, the owner was

GlenL

It may or may not be interference. Act like it is and you'll do fine.

Performance parts are getting the bits from a Euro S. Better exhaust is easily doable. In the meantime, tune the spark advance and mixture for power.

I like the body-colored spoiler. Is that an additional part or a mod of the stock spoiler?

87 944 C

I'm not sure on the spoiler. I'm new to 928s. I've dealt with 944 for a while but new with these and trying to find anything to read about them.

I plan to treat it as an interference I was just hoping for a firm answer. Guess I could always call porsche NA.

First thing I'm doing is timing belt and water pump and cam housing seals which are leaking (probably do the seals and gaskets as well as intake gaskets)

ROG100

Call to Porsche NA - I have a 1980 4.5L ROW 928 and want to know if it has a none interference engine?
Answer - Porsche NA - What is a 928!!!!!

Sorry but most Porsche dealers and in particular Porsche NA have not got a clue when it comes to a 928. Stuttgart is getting better but it will take a long time for them to really catch up with the knowledge freely available on this forum.

A very wise conclusion.

mark kibort

Its not an interference engine. the valves contact the vlave reliefs of the 85 euro at .3" of valve moment.. so , the deeper cuts (.175" '85 vs near .350 on the euro 80-3) make it a non interference engine.

who is the reliable sourse. having built a few of these, ive tested it out and unless you have a .5" cam lift, its not going to hit.

valves hit when depressed .3" into the combustion chamber with a .175 valve relief. since the euro pistons are .35" of valve relief depth, there should be no contact. unless the cam lift is greater than .3 plus the extra .175 of valve relief, or 4.75"

ROG100

Which engine are you talking about Mark? You say 85 Euro - which one? High Compression or low compression?

Really what does it matter if it is interference or not. So if it is none interference does that mean maintenance goes out the window no need to change the TB - OK to leave it for 30 years!!!

What about build up of carbon on the pistons - that can change things.

Not convinced at all.

Treat your car correctly and it will reward you in spades.

87 944 C

I pick the car up the Monday after Thanksgiving, it'll then be parked for a couple weeks while I finish up my project in the garage. The 928 then gets the garage and broken down for a tune up. It also has a fuel supply issue which seems to have traced to the cis computer. Tires are needed but those are readily available so not overly concerned there.

It has new brakes(s4 rear ends), ***** joints, and some other work. No electrical gremlins which from my understanding is a big deal.

I'm really looking forward to spring, both my 928 and stealth turbo will be up and running and driving. Cannot wait