86 951 Driver

Supposedly these make a big difference on the 3.5 V6. I don't know why but they see quite a bit of a gain. I saw it the other weekend at the dyno day I was at.

eman930

These still for sale?

V2Rocket

Hi,
I am going to be doing some dyno time soon to log my before/after Rogue NA-tune as well as my supercharger, and could make time to do one with the spacer too...

Could finally bring this thread to a close.

Chris@Fabspeed

I have a phenolic spacer kit right here, and a dynojet as well. I also have a Zeitronix ZT-2 so I can datalog air intake temp deltas.

I have a few spare N/A intake manifolds - I will drill & tap one of them to accept Zeitronix's air intake temp sensor and place this as close to the cylinder head flange as I can - this is where we will see the difference from a phenolic manifold spacer kit. I will do this to a spare manifold as it is not ideal to place a sensor right in the inlet runner, but, necessary for this test.

I will post the data logs as well as the dyno data. I hope to accomplish this in the next 2 weeks.

Van

If the results are measurable, I'll buy a set.

V2Rocket

More scientific than I was intending, have at it.
Be interesting to compare how our cars react to the spacer, making this perhaps a more accurate test!

eman930

Sweet! I'd grab a set, can't wait to see the results.... This would probably help more on a 951 then a 944 no?

Reimu

These are for heat mainly, right?

I'd imagine the turbo tucked up under the intake is heating it up more than being bolted to the head on a 951.

Gawernator

Interested if good gains on a dyno

locke

this came back from the dead. Right on though! I've been watching this with some detail and keep hoping for the best. I personally could see this working out well mostly with a retune. I don't think the O.E. D.M.E. would make sufficient use of the benefits. though I'm sure with rouge ant at the D.M.E. helm, I could be proven wrong. Sure, heat soak at the intake manifold is nearly a non issue at higher RPMS at high velocity, however. To keep intake runner temps down through stop and go traffic can only benefit the engine as a whole. Even if it doesn't immediately show benefit on a dyno, who's too say you can't compensate for the additional injector length with changing the injector firing timing, fuel pressure, pulse width, or change out for high impedence? (scary I know). play around with ignition as well. this may seem a bit overkill, but if you have the adjustiblilty, find out what kind of tune it would need and go with it. As we have seen from rouge ant, just changing out to a MAF (that he designed), a different tune, and advancing the O.E. camshaft can make a significant difference. I'm curious what the dyno would say about all this stuff with the addition of a webcams or J.M. camshaft. Myself, I'm not plagued with "oh, it's n/a" or "it's only 150hp?" It's already a Great car, though every bump in tech applied to it doesn't hurt!

ideola

morghen

+1

phlfly

well I buy as well if it can help gain ~ 5 hp or more. Do the dyno.

CO951

Bump! I saw a mention of these phenolic spacers (http://philsautomotiveltd.com/wp/?page_id=2) in another recent thread. The concepts are sound and my manifold gets very hot at the track, but I was curious if there was any proof they are effective. Has anyone ever figured out if they are effective or not?

The best testing I could find was this http://www.autospeed.com/cms/article.html?&A=110474 that was done on a Mazda. Better than most but not as good as was discussed on here.

ideola

My popcorn has gone stale more than once waiting for people to post real data. The problem with all of the data I've seen in articles like the one you cited is that it measures the temp of the intake manifold material itself, and not the air within the manifold. I'm unconvinced these have any merit until someone posts real data showing reduced intake AIR temps.