85euro928

PM sent.

Jadz928

928 Parts East quoted me $1250 for an '85 shortblock, just to give you an idea.

I think I can help you with the piston valve relief geometry, for your machinist.
I know where there's a set of fly-cut pistons sitting in a box. Could make a good template.

85euro928

That's a good number. Can I just use it as-is or does it need to be gone over (bearings and rings)?
Would the pistons need to be cut differently than the 4.7L's? Maybe the machinist can just use one of them as a template.

tv

Who put on the aftermarket radio antenna? 1985 Euro's had the antenna in the windshield vs. 84 Euro's that had the external antenna where yours is. So if that is not an aftermarket antenna this will be the first 85 that I have seen with such a set-up. Manuals make a big deal of the changes between 84 and 85.

A well running Euro should satisfy anyones desire for any driving that can be done in the US, mine will do 170, 0-60 very quick, spin both rears at will like you mention.

Usually a euro is pretty much bullet proof off the track. Yet this engine has had 2 major hiccups. This engine has bad karma, I would replace it with something, if you are attached to the rest of your car then keep it and pour a ****load of dough and time into it, otherwise sell and start again.

OBehave

Keep it!! Get a 5.0 short block and do the hybrid thing.it is the best bang for your buck and since you have to open up the bottom end of your engine anyway makes the most sense.Save your old block and rebuild it when you are able.Your model of shark is the most desireable of the OB's and would be worth more running than not. Just my .02 cents. Ed

P.S. Nice car!

85euro928

I thought the same thing about the antenna, maybe the PO added it when they changed out the stereo to an Alpine unit. There is an antenna in the windshield which I was thinking of reutilizing but haven't had a chance to fool with it yet. Don't get me wrong about the car, although I've only gotten it to 162 it was uphill, racing a RS8 (he quit around 150), I think it would do 170 but it's not top speed I'm looking for. I have an '09 Maxima Sport which would give the 928 a run for it's money right up to 125 and which has equally good handling abilty (my opinion). Granted I'm not comparing apples to apples, but if I can why not add a little more, right? There are plenty of listers who have added SC'rs because of the additional desire. By the way, the car doesn't have bad karma, I do.

GregBBRD

Throw the crank and rods away. There is plenty of really choice used stuff out there.

Rebuild or sell.

How do you work on a car for 2 years (or 2 days) and not know the rod bearings are going away?

This is for everyone:

The oil filter is like an x-ray picture of the inside of your engine. Taking it off and throwing it away is like going to the doctor, getting a bunch of tests, and then never looking at the results! Buy yourself an oil filter cutter and open up every filter you take off.

85euro928

Good advice. The problem is I spent the first summer and winter getting it running (I only drive it May thru September then it's garaged). I spent the second winter rebuilding the suspension as the new tires peeled away in less than 1k miles. This summer I actually tried to enjoy it and clean it up a bit. This winter was supposed to be the pan gasket and rod bearings (maybe a high output steering pump). Plus, I'm not sure what I would have found in the oil filter anyway. One of the first things I did when I bought the car was to change all the fluids, etc. When I did I drilled the engine and trans oil plugs and installed super magnets. I've been changing the oil before my driving season and have never seen a trace of anything that would have led me to believe this would happen. Also, I just recently read that this is a problem. Who would have thought that there would be such a design flaw in a Porsche.

85euro928

Just another thing, there was no indication that the bearings were going. I'm running solid motor mounts, not solid rubber but solid metal, and can hear every noise the engine makes even at speed. If a bearing had given any indication it was going I would of heard it. And like most other people who drive these cars most of the time I don't turn the radio on as I'd rather listen to the engine

tv

The maxima sport is a great looking car inside and out! I just read the review here to get the facts. As nice as it is it will not keep up with a good euro - its down 30/40 on power and 400lbs heavier.
If you throw in a few curves there is no way its going to be comparable to a supercar design like the 928 especially if you have new wide rubber and fresh suspension.


85 euro engines must be getting scarce, not many 25 years ago - I have 2 of them. A rennlister from the pennsacola area used to have a spare/brains for sale a few years back - try that. Maybe the cheapest route.


Otherwise if you are going to spend big money on an engine, then you would want everything else top notch, I would think. Your pics may be misleading but your paint may need a spray. Not being negative, just helpful as this is the course I personally would follow,(reason I bought the spare years ago). New paint, new engine, then new interior, gets pricey, all in or new path. That's my thoughts.

pcar928fan

I like the thought of a 5.0 EURO hybrid motor... You state that you just read this is a known problem w/ 928's, I have to say, I have never heard of a Euro 4.7L spinning a rod bearing before... not that it has not happened, I just have never heard of it happening! '90 and '91 GT's that have been tracked, yea, I am buying that...hear that story all the time, but not in any of the other 928 motors...

85euro928

TV,
The paint lloks bad on the hood and top of the front fenders, otherwise it's OK. The car was garaged under a car cover for a few years. I took the car to the local paint shop and the guy told me to try a polishing compound first as the cars value doesn't warrant a repaint (I agreed). He said he's heard of this happening before. Whether he's right or not will have to wait until next spring as the engine comes first. Yea, the Maxima is very nice, but it's not the 928. That's why the 928 is my DD during the Summer.
Pcar928fan,
There is a thread with a survey on RL that I found last night where 16 people had responded to rod bearing failure. I believe there were 8 GT's, 5 late 80's, and 3 OB's. I have to see if I can find it again and I'll post the link.

buzzdwyer

ok, being one of the very few "bastard children" here with a Renegade Hybrid kit i thought i would speak up from the dark side. Doing the Renegade Hybrid is a very personal decision. My conversion was part of a fairly extensive restoration of my '78 euro. I was new to the 928 family and wanted a unique car. The '78 euro with the '95 LT1 engine has given me that. I wanted to do all the work myself and i had a few years to complete the project. So, if you want a unique car and are not a complete "purist" the Renegade Hybrid kit may be right for you.

85euro928

pcar928fan,
Check out this thread, the survey is at the top of the thread. As you said no euro's though.
https://rennlist.com/forums/928-foru...e-a-study.html

85euro928

Buzzdwyer,
I may have an angry mob here later tonight but I won't be home anyway, so here it goes: I'm not a purist. I love the car as it is unique but being smoked by "other" Porsche's (numbers and names withheld on purposes) and every other stock American made late model pseudo-muscle car is not what I had in mind when I signed on. Is it wrong to want a couple more HP without having to spend my kids college funds? I've already resigned myself that the resale value is plummeting so fast that whatever I do to the car is for me. That being said I have no issue with the conversion, that's why I suggest it. More importantly, are you happy with yours?