whats the max hp 50# injectors will support?

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Jan 18, 2004 | 05:45 PM

#16

rskrause

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Joined: Dec 1969

Posts: 10,745

From: Buffalo, New York

Quote:

Originally posted by mehoffz24
so all you guys are saying that if i make 550rwhp or so that the walbro 340 and 83# injectors will be over kill , and will be fine if i ever wanted to upgrade anything to run more boost. when you using the stock regulator how do you adjust the fuel pressure, throught the pcm? thanks for all the GREAT info

The stock FP regulator is not adjustable and is not controlled by the PCM. But it is "vacuum referenced", so the FP vareis directly with manifold pressure. IOW, it is a "1:1 FMU" in a manner of speaking. I am using an adjustable FP regulator at this point, it can be a valuable tuning aid. But you may well not need one in which case just stick with the stocker.

Rich Krause

Jan 18, 2004 | 06:18 PM

#17

mehoffz24

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Joined: Sep 2002

Posts: 550

From: monmouth county NJ

so for the amount of power i want to make the 340 and the 83 s will be just fine right? 550rwhp

Jan 18, 2004 | 07:31 PM

#18

engineermike

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Joined: Mar 2002

Posts: 2,743

From: Baton Rouge, LA, USA

83's will be fine. I just got done tuning mine on the WB O2 with 83's. I had the PE tables at +48% and A/F ratio was pegged rich. After backing off a bit on the PE, the A/F is now ~11.1/1 with the combo in my sig. at 13 psi boost.

The 340 will be marginal, perhaps not enough pump. A volt blaster / Boost a pump would make it work, though.

Mike