ROG100

Some interest in our spacers so here is the information.
No claims here for additional HP gains because on the dyno we could not measure anything significant.
Lots of serious 928 drivers use them - either as a pair or a single on the drivers side (left).
Ours look awesome in place and I am sure as part of an overall tune add ponies.
We added the oil seal grooves to save using messy sealants and do the job properly.

Kit includes left and right spacer, install hardware and left & right O ring seal.
$165 per set.

cpayne

Roger,
These look nice.
Can you send me the intake R/R spreadsheet. I may add a set of these once I see what ts going to run me. Thanks
Charles

Randy V

What is the intended benefit?

Alan

Roger - nice that these are milled for the O ring. Do you need to remove the fuel rails to install them?

Alan

Mongo

I just don't get how improving and increasing plenum volume wouldn't yield a gain. On a supercharged car I can understand, but why not these?

SeanR

I can't say if there was an improvement or not. We did same day trials on my wifes '90. In the morning we ran 3 dyno runs and went back to the shop, installed these and went back in the afternoon. The numbers were the same at the ground, BUT, the car had thrown a knock sensor fault #1 after the first run, so technically we could say there was improvment since the numbers didn't change and the timing was pulled back.

I know on my own car the performance was improved but I also put the GTS intake on at the same time I put these on, so it could have been a combination of things. I really need to get my car back to the dyno and see what it's putting down. At EIS testing w/o the intake stuff done, it was 299/308 or so.

I just wanted them 'cause they looked great, if I get some performance improvement, that's a good plus.

RKD in OKC

It's not just improving and increasing plenum volume to yield a gain, it's HOW MUCH you improve/increase the volume to see a noticeable/measurable gain.

When I had my 944 turbo I did a on dyno swap of intakes between the stock and the Lindsay Racing. The LR intake has a slightly larger plenum and much more balanced flow to each cylinder. At the boost and flow to make 340 rwhp on the 2.5 liter, the LR intake made no difference at the rear wheels. On a bored and stroked 3 liter 944 turbo motor flowing enough to make over 400 rwhp the LR intake added 40 rwhp. The conclusion was that the stock intake was flowing well enough at the lower flow rates that the LR intake gave no measurable gains.

Maybe the test to do for these intake spacers is before and after gas mileage to see if it is more efficient?

ROG100

I am not going to blow smoke up anyones back side and say we got additional HP when we could not prove one way or another that they did - sorry just me being honest.
If all the 928 tuners use them then they do so for a reason - so draw your own conclusions.

You do remove the fuel rails to fit them. May need new injector O rings. You also have to modify the injection rail cover.

fraggle

Sean's right they do look bitchin.

mark kibort

Your the best Rog!
hey, i still kind of believe with the stock S4, but with the stroker, it was a loss.
Brians dyno runs seems to be a little bit of again. messing with the heimholz resonator is tough business!

IcemanG17

these are MUCH easier to install......the "make a gasket" goop gets EVERYWHERE & is hard to make seal...I had to do one side twice on my street car....after squirting goop all over the place on the other side.....

Fastest928

Having built the originals spacers back in 04-05, and dyno the heii out of them on stock engines, I found zero gains. Never tried one sided or tuning with Sharktuner.

Stoker gains were achieved, but in the 2% range....

Best of luck,
Marc

ROG100

928 Docs has a customer that needs a pair of intake spacers - I am arranging to make some more and wanted to test interest to judge how many to make. These are the superior spacers with O ring grooves and unlike the "ANother" type with super glue to attach them.

Before you ask Sean did try and buy a pair from the "Racing Car Guy" in WI but he refused to sell them to him. I guess he thinks his are not good enough for a nice car. I also seem to remember he designed and built them as well - total BS. See post #12 and also talk to Sterling Gee - sheesh!!!

Let me know if you would like a pair by email at Roger@928srus.com.

No BS about adding 10HP from us just buy them because they look great on the car - see pictures/read the thread.

SeanR

Thanks Rog for getting these back in production, I've only been bugging you for a few months .

Buddy's car that stopped by yesterday.

ptuomov

You can take it for what it's worth, but here's what I think. The spacers will move the flappy closed first torque peak slightly down in rpm. So you get some more torque at low rpms. There's not much impact on flappy open performance, but logic dictates it can't hurt. The valley between the flappy closed and flappy open torque peaks gets steeper.

In my opinion, the best way to run these spacers is to Sharktune the flappy opening point to something like 50-100 rpm lower level than stock and then set the flappy to stay open until 7000 rpm (past the redline).