Carl Fausett

For Sale – Extrude-honed 32v 928 intake with custom intake shoe. This manifold will fit all 1987-1995 Porsche 928.

On the dyno, this intake manifold produced a 55.4 HP increase on a 6.5 Liter engine with no other changes. In addition, it moved the peak
power spike from around 5400 rpm to about 6000 rpm as the dyno charts attached show. The throttle body mounting plate is designed to
accept any LS-type throttle bodies, so you have a great number of choices to choose from.

The cost of making this intake manifold and shoe was $1605.00* If you are interested, please PM me or Catorce with your offer.

This intake manifold was dyno tested and discussed on page 43, posts 634 and 636 of this thread:
https://rennlist.com/forums/928-foru...e-dead-43.html

Imo000

Hey Kibort!!!

Catorce

Let's make a deal, people! Veteran's day sale is now on!

Tony

I'm more impressed on how you swapped out the manifold in 1hr 06 min on a hot motor!

BauerR

What is required to run an LS TB, other than the correct flange?

Catorce

Paging Carl

ptuomov

Can this be made to run with the stock MAF in stock location, and thus with the reprogrammed stock computers? If it can, it should sell in no time.

The Forgotten On

Looks like it. You just need to bolt on a stock throttle body housing from another intake.

Everything else looks the same.

merchauser

is this a one off or something that will be made available from the shelf?

ptuomov

What I mean is that can the lower manifold part be used with an aftermarket throttle body and the stock MAF in the stock location? I think a lot (but not all) of the gains came from the larger throttle body and better flowing lower manifold.

The Forgotten On

The throttle body on an LS is only 78 MM, similar to the S4's; so I don't think the gains are from there.

ptuomov

I think he means the bolt pattern. The dyno run was done with a 90mm throttle body.

SMTCapeCod

Interesting on the HP, how did the TQ fare?

Seems like you'd want custom cams to take max advantage of it. But i guess if you're running a 6.5L that is a given.

Carl Fausett

Sorry, I was out for the weekend.

Let e see how many of these questions I can answer.

The throttle bodies available for LS motors are many and varied. Often between 90 and 104mm in size. For this dyno, we used a 90mm TB. Yes, that is larger than the stock TB.

What would be required to use this manifold as-is is either: 1) use an LS TB and a after-market engine management (we favor Electromotive but Mega Squirt, Motec, Halltech, etc. would also work), or, 2) modify the throttle body plate to use the stock MAF and then use the stock LH and EZK.

I have no idea why you would go this far and do option (2), but you could.

This was a one-of intake manifold build. I can make more if requested, but the new intake manifold we have just developed is where we are now spending our time, and there will be no further development of this one.

Torque numbers are posted. They are on the dyno charts.

Carl Fausett

That's one of the benefits of an engine dyno to a chassis dyno. Much easier to test different iterations.

In this pic, you can see one intake manifold on the workbench, while the other is on the motor.

To reduce variables, we like to run different iterations in the SAME FEW HOURS, thereby reducing any change in HP that would come from
changes in barometric pressure and humidity if we were to run the second test on a whole different day.