RFJ

ignorance is not bliss, was looking at big al's postings about intake runners and thought oh sh-t me too? started checking numbers and found that sn looks good,block looks good, heads look good, but for an 85 euro s has wrong numbers on t/b intake runners, what to do ? man turning into a money pit. so, if anyone has or runs into intake setup and would sell it to me i would be thankful, nothing else to do. best to al ,Ray

RFJ

does anyone think that porsche put smaller intake on some of these if they ran out of parts to assemble?

GlenL

There are many instances of this in our cars especially dribble-over between model years. Surprisingly poor inventory management.

Take the whole 86.5 thing. Do you believe they really wanted to cut in a suspension change mid-year? I'd be curious about the real story on that. Probably found the minimum order for a part was too many and ordered the new stuff instead.

RFJ

Thanks for the reply Glen, guess i would have to agree, bye for now,Ray

BigAl1

RFJ, I'm no expert (yet!) on the variations between years regarding the intake runners, but have seen pics of Euro S 84-85 engines where the runners look like the more "curvy" castings used on the regular S engine. I *think* the larger, shorter runners were only used on the CIS Euro S engines. Somebody correct me if I'm wrong!

RFJ

thanks for the reply, could you tell me what cis stands for? and if that is the case what hp does this euro make for hp? would be less which sort of short changes a lot of us who thought we were getting something we were not,right? also did you get a larger tb and spider for yours? and do you know where i might find another? thanks for any and all, Ray

Landseer

Shortchanged?

BigAl1

RFJ,
I actually don't know what CIS stands for, but it is the mechanical injection system with a fuel distibutor, the same system was used on Mercedes, VW, Ferrari, etc. I believe the TB and plenum on mine are correct '80 Euro S parts, just the runners were changed to the regular style. I have not started on engine rebuild yet, but when I do I'll be watching carefully for previous, non-factory work. Maybe these runners did come on the car originally? Karl and I have a deal for his spare CIS Euro S runners.
For your HP question, I don't know for your year. For 1980 4.7 Euro S engine it is 300HP.

GlenL

"Continuous Injection System"

Formally know as "K-Jetronic" where the "K" stands for kontinuierlich which is "continuous" in German.

Check the part numbers you've found for being on another model or year. Often larger metal parts have "casting numbers" on them and not actual part numbers. Maybe you've got the right runners after all.

karl ruiter

I also think that they used the smaller diameter intake tubes on the last of the euro 16V cars. It this is correct the reason would be that they needed intake tubes that would accept an electronic injector rather than the CIS injector, so they used the intake tubes they had been using for the US L jet cars. They probably felt that the smaller diameter would not have a big enough impact in performance to merit designing new tubes for these last couple of years of 16V production. And based on the published performace numbers, looks like they would have been right. It is possible that there could have been a 'using up stock' factor too, but then that might be the reason why they stuck with 16V motors for these years when the US cars were already 32V. Or perhaps it was just because the US 32V motors were still not making as much HP as the euro 16V cars.

James Bailey

More like they had too much early stuff left over and put it ONLY on the USA early 1986 cars the Euro 86 were all updated......they were dumping surplus on the USA customers who not being real drivers would not know the difference The 914 engined 912E was another example of dumping on the U S market.

hacker-pschorr

The EuroS has a temp sensor on runner #3.

What did they do, add a fitting or start using the 85/86 airbox?

What about the under TB "U" piece?

James Bailey

The Euro runners and throttle bodies are larger both CIS and LH . Porsche prototyped the 5 liter 32 valve in the USA market in 85-86 then made a number of improvements for the 87 S-4 engine which was used worldwide. The 4.7 LH Euro made about 310 hp.

RFJ

ok one last question, mine is a n s2 euro but with the smaller t/b and air tubes , how power would it really make?? surely not 310hp?thank you,Ray

RFJ

Yes, has temp sensor on runner 3 but small t/b & runners? make sense?