HSR replacement FPR
Thread Starter
Le Mans Master
Joined: Oct 2008
Posts: 9,758
Likes: 49
From: Houston Texas
HSR replacement FPR
I Have a HSR on my 91 At WOT the fuel pressure drops. I believe I need a FPR. Given the bad reviews on the Holley FPR I would like suggestions on a good brand that will bolt right up.
I hear the Buick GN FPR will bolt right up, Is this true?
I hear the Buick GN FPR will bolt right up, Is this true?
Melting Slicks
Joined: Jan 2005
Posts: 2,658
Likes: 4
From: Clifton Park NY
According to the guys over on thirdgen, most have switched to kirban fpr's.
Le Mans Master
Joined: Jul 2007
Posts: 5,043
Likes: 8
From: Tampa Florida
It is very normal to loose between 2 - 10 PSI on the fuel rails with vacuum hose "connected" to the FPR and the engine running. AFPR is a great way to dial in fuel pressure your after with the engine running....I run a BBK AFPR on my TPI setup myself.
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
When mine crapped out I plugged the hole and mounted a Aeromotive #13301 to the end of the rail
Being the slim body type it is a nice fit clearing the wiper mtr
Pic is of MSR's SP intake but same fitment
( Only used return port at bottom ; not balance line to otherside as shown
Last edited by rodj; Nov 4, 2009 at 01:24 AM.
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
Thread Starter
Le Mans Master
Joined: Oct 2008
Posts: 9,758
Likes: 49
From: Houston Texas
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Race Director
Joined: Sep 2003
Posts: 16,839
Likes: 341
From: Database Error Indiana
I bought the Walbro from Racetronix. My car did a similar thing. Was going lean on the wideband at high RPM. Probably at a similar power level. Pump fixed it. Stock pump just did not keep up.
Team Owner
Joined: Jul 2004
Posts: 28,502
Likes: 3,302
From: Hartford WI
Here is how I would proceed if it were my car.
1. Change the fuel filter at the chasis and in the tank.
2. Check the fuel pressure at idle with the hose off
3. Check the fuel pressure at WOT when there is consumption
4. Check the bleed down of the fuel pressure to see if the regulator is good
5. Hook up a DVOM to see what power the pump is getting
If your regulator is leaking fuel off too fast, the pump cannot keep up. See if it is bleeding off too quickly. Next, if the fuel pump is not getting the right power, the pump will not help. If it is the pump get a racetronix pump with all the hardware to make it work right
1. Change the fuel filter at the chasis and in the tank.
2. Check the fuel pressure at idle with the hose off
3. Check the fuel pressure at WOT when there is consumption
4. Check the bleed down of the fuel pressure to see if the regulator is good
5. Hook up a DVOM to see what power the pump is getting
If your regulator is leaking fuel off too fast, the pump cannot keep up. See if it is bleeding off too quickly. Next, if the fuel pump is not getting the right power, the pump will not help. If it is the pump get a racetronix pump with all the hardware to make it work right
