Carl Fausett

I know with the right location for the holes, you could probably reasonably center the header over each 16v exhaust port. But I can't come to terms with that large of a transition right at the head. That much turbulence dumping small port into a bigger tube like that will probably (IMO) ruin all the scavenging action that was available...

And BTW: these 16v heads have been massaged a wee bit. Their ports are actually slightly larger than stock!

atb

Any chance of mounting the headers backward (collectors pointing forward) for the purposes of getting a dyno reading?

Carl Fausett

Not reasonably, no.

Carl Fausett

Doing a count of 16v headers in stock - we find there aren't that many... so development has begun today on transferring the merged collector system over to the 16v headers too.

I'd like to do a before-and-after dyno pull for these new headers.

So this is a call out to someone who has MSDS headers currently installed on their 16v 928 and would like a "free" upgrade. Bring us your car and we will do a baseline dyno pull on it. Then we will swap out your Gen 1 headers for the new Gen 2 headers with merged collectors, and dyno it again.

Here are your costs: The headers will be no cost to you. You will not have to pay for the dyno time either. You will be charged 50% shop labor rate to swap the headers.

Let me know!

PS: same deal is available for somebody with a 32v 928 and a set of Gen 1 MSDS headers installed....

hacker-pschorr

If no one jumps at the offer, we can use my track car but I'm not driving my 79 to Horicon. A lot easier to just ship the headers up here.

Here is the before:
https://rennlist.com/forums/928-foru...t-exhaust.html

This is assuming the new headers will bolt up to my exhaust.

vze2jshn

Is there room on the reconfigured 16v headers to allow dropping the clutch out without the detach headers at the heads rigamarole?

MjRocket

Roughly what kind of HP increase could one expect to see with these over stock headers on an 87?

The car is supercharged if that makes a difference.

Thx

mark kibort

i always wondered why the headers on the 2 valvers were designed that way.... replace the clutch, and you have to remove the headers (or header )
is there an other reason why they cant angle around the lower bell housing like the S4 style?

Ducman82

"trying" to keep "equal as possible" lengths maybe?

Carl Fausett

all these things are in the design parameters. equal length primaries or close to; clutch service (at least not worse than present)

I think what makes them angle in so aggressively is the attempt to meet up at the stock exhaust before the catalytic converter.

Carl Fausett

I'll guess 10 HP over stock headers on a SC'd car, depending on the restrictions in the exhaust system downstream. 15 HP over stock headers on an NA car

terry gt

Any thought of the headers having a V band clamp instead of the 3 hole plate ? or at least going up to 3/8 inch material . my MSDS headers always leak .

Carl Fausett

Correct. And that was the impetus for this development.

Carl Fausett

Terry, a good dead-soft aluminum flange gasket will help, and some of us use two of them stacked.

Otherwise, buy the v-band clamps and have your local exhaust guy weld them in!

terry gt

Carl ,I tried the aluminum flange gasket . they got so hot they deformed and leaked