Well since I was maxing out the fuel system I decided to do this and it made such a big difference, I wanted to share .
I followed this very detailed writeup CLICKY (99-04 GT guys look at page 10 for the wire colours...ours are pink/grey and pink/black) and bought all the parts. (went to Mothers window tint to find that darn relay! Noone else had it...but you can get them online)
So I did the upgrade and these are the results.
BEFORE @ idle and cruize my duty cycle was 46-48%
NOW @ idle and cruize its around 43-44%
BEFORE @ 10PSI in 3rd gear I was seeing 100% duty cycle @ 5400RPMs
NOW @ 10PSI it hit 89% @ around 5400RPMs and then STAYED right there to 6000RPMs where I let out
BEFORE @ 12PSI in 4th it would go 100% @ around 5400 (maybe/probably sooner) and start leaning out @ around 5700-5800RPMs.
NOW @ 12PSI in 3rd and 4th gear its hits 90% @ 5400 or so and stays right there until I let off
This added ALOT of capability to my fuel system and I HIGHLY HIGHLY recommend this mod to anyone who is near their fuel system limits. This will open up ALOT of room...especially on dual pump apps like mine. I would venture to say it added a good 25% capacity to my fuel system...now its working like its supposed to!
Im running dual Ford GT fuel pumps, 42# injectors, stock lines/rails, 03 cobra tank/basket, and gates hose out of the pumps to the PPRV and then stock hose from the PPRV to the outlet.
I could gain even more by removing the PPRV, but since my fual system will now support more than my shortblock....im not even going to worry about it.
I followed this very detailed writeup CLICKY (99-04 GT guys look at page 10 for the wire colours...ours are pink/grey and pink/black) and bought all the parts. (went to Mothers window tint to find that darn relay! Noone else had it...but you can get them online)
So I did the upgrade and these are the results.
BEFORE @ idle and cruize my duty cycle was 46-48%
NOW @ idle and cruize its around 43-44%
BEFORE @ 10PSI in 3rd gear I was seeing 100% duty cycle @ 5400RPMs
NOW @ 10PSI it hit 89% @ around 5400RPMs and then STAYED right there to 6000RPMs where I let out
BEFORE @ 12PSI in 4th it would go 100% @ around 5400 (maybe/probably sooner) and start leaning out @ around 5700-5800RPMs.
NOW @ 12PSI in 3rd and 4th gear its hits 90% @ 5400 or so and stays right there until I let off
This added ALOT of capability to my fuel system and I HIGHLY HIGHLY recommend this mod to anyone who is near their fuel system limits. This will open up ALOT of room...especially on dual pump apps like mine. I would venture to say it added a good 25% capacity to my fuel system...now its working like its supposed to!
Im running dual Ford GT fuel pumps, 42# injectors, stock lines/rails, 03 cobra tank/basket, and gates hose out of the pumps to the PPRV and then stock hose from the PPRV to the outlet.
I could gain even more by removing the PPRV, but since my fual system will now support more than my shortblock....im not even going to worry about it.