[Shotimes] fuel pressure regulator and 255lph pump issue

Carl Prochilo gr8sho@prochilo.myserver.org
Sun, 11 Sep 2005 12:09:34 -0400 (Eastern Daylight Time)


What are the symptoms when the overrun does occur?
-- 
Cheers,
Carl Prochilo
92 Ultra Red Crimson

On Sun, September 11, 2005 10:42, Bruce Malachuk said:
> I've found that the 190lph won't always over run the stock FPR as a
> friend
> has one in his car and his fuel pressures are where they are supposed
> to be.
> FWIW I think the MTX SHO's got a 110lph, and a 155 is the next larger
> step
> that one can go to without running the possible risk of overrunning
> the
> stock FPR. I have read enough accounts of the 190 overrunning, but it
> seems
> it doesn't happen to everyone.
>
>
> Bruce J Malachuk
>
> *	94 Opal Frost MTX
> *	93 Emerald Green MTX - SOLD
> *	93 Black ATX - New Parts CAR
> *	95 Silver Frost ATX SE - SLO -Buyer waiting
> *	96 TR - Cam Failed parts car :-(
>
>
> -----Original Message-----
> From: shotimes-admin@autox.team.net
> [mailto:shotimes-admin@autox.team.net]
> On Behalf Of Carl Prochilo
> Sent: Saturday, September 10, 2005 9:23 PM
> To: shotimes@autox.team.net
> Subject: Re: [Shotimes] fuel pressure regulator and 255lph pump issue
>
> The stocker is not 155lph.  If you were to buy that size pump from say
> apeusa.com, it would be considered an upgrade.  This should be fine
> for a
> BOS upgraded SHO.  Even the 190lph pump will overrun the FPR.
> --
> Cheers,
> Carl Prochilo
> 92 Ultra Red Crimson
>
> On Sat, September 10, 2005 21:08, Michael Tulloch said:
>> Hello All:
>>
>>   I have been reading more and more of what I should have done
>> before
>> replacing my fuel pump.  I installed a 255lph walbro pump under the
>> suggestion I thought from here that the stock pump (155lph) wasn't
>> enough for WOT fuel rate.  Now I'm reading more and more articles
>> stating the stock fuel pressure regulator can't handle the increased
>> pressure and will cause a lean-out at WOT through the ECU pulling
>> injector pulse width.  The exact opposite of what I wanted.  I've
>> read
>> up on the SHONut fuel pressure regulator kit but not excited on
>> buying
>> a $250 kit to fix a mis-directed replacement pump.  Has anyone tried
>> a
>> Holley
>> (HLY-512-503-5) or Accel ( ACC-74560) regs from Summitracing.com?
>>
>> Michael.
>>
>>
>>
>>
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