hacker-pschorr

What is your air / fuel now at WOT?

John Speake

You've certainly changed the car enough to require modifications to the fuelling, for example, that modified air intake will work with the MAF rather differently than the stock air filter. The headers and exhaust will also affect fuelling requirements and optimum ignition timing.

Being able to adjust the fuel pressure might address one part of the load/rpm range, but that's all.

123quattro

Not really. Once the intake is all put together you can't really see much. The FPR is sitting on the passenger side of the firewall right by the back of of the cylinder head. I only went this way because I converted to later style fuel injectors and rails. I also got rid of the cold start injector since it didn't really work with my Euro heads.

Once we got it on the dyno I played with fuel pressure under wot so that I the A/F ratio I wanted. I wouldn't try that unless you have a wideband in the exhaust.

Landseer

No, two dampers and one regulator. The configuration of the parts makes one of the dampers look like a regulator, but its not. Check the bosch part numbers to confirm when changing stuff.

Jim eliminated one damper on the 84 when making the change.

Be aware there is a technical service bulletin from early 85 out there, also, perhaps 32V only?? I forget --- anyway, that service bulletin Flip-Flopped the side of the car on which the regulator was located! Early 85 32V had the regulator on the (USA) drivers side originally. http://forums.pelicanparts.com/porsc...-damper-2.html Its possible to get confused by this.

Tampa 928s

It seems the Euro is the only one with two FP regulators!

Landseer

Really?

Ahhh, on the ROW PET..... hmmmmm. So I make yet another ASSumption. Sorry. (Else its an error in PET --- I'm pridefully clinging on to hope)

hacker-pschorr

80-84 L-Jet too

Drewster67

Stock configuration. Dont have any numbers to provide. At least not yet.

Landseer

Absolutely correct.... WSM goes into detail on multiple pages on the M21/22 LH-Jet system and has specified TWO pressure regulators.

Then, for M41/42 LH-Jet (32V USA) explicitly shows one regulator and two dampers.

WOW. Thanks.

Landseer

And, as Hacker stated, same is true, 2 Fuel Regulators for L-Jet cars.

I was way-wrong in thinking on the L-jets and the Euro LH cars.

But it does change to one regulator for 32V...

928mac

Thanks James,
I made another nasty error.
Thanks Hacker.
I will be sticking with the stock as I have enough to contend with, without having to play with a finicky reg that may lean out or have some other issue..