Originally Posted by 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.

Originally Posted by Landseer

Can you post some pictures of the engine bay and the intake tubes?
There are actually 4 different sets of 16V tubes.
(The high-hp cars have the larger diam versions)

Lots of nuances in intakes between the various 16V cars.


Here's my attempt to summarize:
(one other note: never substitute the L-jet barbed injectors into the Euro LH-Jet car. The impedance difference can fry the LH-jet computer)

Originally Posted by Landseer

Can you post some pictures of the engine bay and the intake tubes?
There are actually 4 different sets of 16V tubes.
(The high-hp cars have the larger diam versions)

Lots of nuances in intakes between the various 16V cars.


Here's my attempt to summarize:
(one other note: never substitute the L-jet barbed injectors into the Euro LH-Jet car. The impedance difference can fry the LH-jet computer)

Originally Posted by Landseer

Ahh.

Well, the runners in the pictures match up to the "R".
Plus Hacker has them on a Euro.
And they are the exact intake tubes on Jadz928's 84 Euro which I just confirmed.
And they are totally different than the 84 USA L-jet tubes I'm looking at right now.

So maybe there is no problem!!!

Originally Posted by RFJ

well your info looks good and i thank you for that, it was pictures of larger intake tubes and Mark K talking of t/b's with an id of up to 3.5 inchs that really got me going and i will continue to look until i find out.If and i mean IF my car really makes 310 crank hp then imagine what the larger runners and t/b would do or maybe i am dreaming, i don't think so. thanks, Ray

Originally Posted by soupcan

The Euro S 'with the larger runners' makes 310, there is a number of dyno day in the next month in SW Florida to find out what you have now.

Originally Posted by RFJ

thank you Brian, would you know there size and also the size of the t/b and where to find info on same? AS far as dyno in the next month- back operation on 1-19-11 and i would at least a month before i do anything, nevertheless very interesting i had no idea, thanks, Ray. would still like to know if s-4 t/b's would fit on an s-2. thanks

Originally Posted by soupcan

S4 TB is different, won't interchange. The euro s TB is 3.4 diameter if I remember.
You have the best 4.7 combo.