[Silver BLT]

I read in a post by Greimann who stated he was able to improve throttle response by upping the pressure from the fuel pump a few lbs. above stock. What is the stock pressure? PSI please. I have a hard enough time with KPH <img src="/forum/images/smilies/968/blink.gif" class="smilie" alt="" /> What is the gpm rating ?(flow) On one of my other cars we (the group) would use higher voltage supply and upped the output that way, it was used in conjunction with larger injectors. (turbo setup though)

Cool idea Greimann, got any others like it?



Silver BLT

(FNG)

Partial Post: Please Login or Register to read the full post.

[Duckman]

Dave, how did you increase the pressure?

Partial Post: Please Login or Register to read the full post.

[flash]

dave and i both have the afpr from paragon - we have both been playing with the pressure, and think we nailed it - works very nicely - seems to be very happy with the racer x chip and other mods i have - nice low end torque bump and throttle response across the board

Partial Post: Please Login or Register to read the full post.

[Silver BLT]

Note to self:

Read website thoroughly prior to posting <img src="/forum/images/smilies/968/dry.gif" class="smilie" alt="" />

I found the static and idle fuel pressures in the Technical specifications pocket book uploaded by Pors968, Thank you.

The static pressure is recommended at 3.8 +/- .2 Bar which = 55.86 PSI +/- 2.94

The no load Idle pressure is recommended at 3.3 +/- Bar which = 48.51 PSI +/- 2.94 .

If the stock fuel pressure regulator is static, not adjustable, it would seem feasible to simply replace it with an appropriately adjustable unit capable of handling the pressure needed. Seems simple enough <img src="/forum/images/smilies/968/wink.gif" class="smilie" alt="" /> Thoughts?



Ron

(FNG)

Partial Post: Please Login or Register to read the full post.

[Silver BLT]

Flash,



LBS #s?

Partial Post: Please Login or Register to read the full post.

[Silver BLT]

[quote name='Silver BLT' date='Mar 1 2005, 09:24 AM']Flash,



LBS #s?

[right][post="1295"]<{POST_SNAPBACK}>[/post][/right][/quote]

@#$%$$#&*

See above note to self.

6 lbs > stock

<img src="/forum/images/smilies/968/wacko.gif" class="smilie" alt="" />

Sorry WOB

Partial Post: Please Login or Register to read the full post.

[Duckman]

Hmmmmmmmmm? I'll check it on the Paragon website. Sounds very interesting.

Partial Post: Please Login or Register to read the full post.

[Greimann]

The adjustable fuel pressure regulator is a good modification. You will, of course, use more fuel. Also, the tricky part is rigging the gauge. You either need a gauge from a dealer, or cobble one together with some fabricated fittings:

http://www.968engineering.com/fuelgauge.html



The gauge tap on the fuel rail is a strange DIN spec internal tapered seat and you cannot find an off the shelf gauge in the US to fit that thing.



Stock pressure is 58 PSI with the vacuum disconnected. 64 PSI is about the upper limit. Also know that it MAY jeopardize a smog test. I will not be taking any chances and dialing mine back before hand.



I think I haven't made too big of a deal about this before because of the complexity of getting the gauge hooked up.

Partial Post: Please Login or Register to read the full post.

[Duckman]

OK, I think this is too complicated for me. I have to think about it a little while.



FYI, I just had my smog and safety checks completed. The technician commented that my car was running exceptionally lean, although very, very clean. More fuel pushed by higher pressure might not be a problem.

Partial Post: Please Login or Register to read the full post.

[Greimann]

Just know that there is a Porsche / VW special gauge tool available that hooks up directly. You just have to track it down and buy it. Probably from a dealer.

Partial Post: Please Login or Register to read the full post.

[Duckman]

Thanks, Dave.

Partial Post: Please Login or Register to read the full post.

[Greimann]

As a follow-up, the Porsche special tool for the fuel pressure gauge is P378, and the VW tool is VW 1318. They are both the same thing. They screw onto the fuel rail bung that is specifically for this gauge.

Partial Post: Please Login or Register to read the full post.