Adjustable Fuel Pressure Regulator
Thread Starter
Racer
Joined: Apr 2000
Posts: 341
Likes: 0
From: Lexington KY
Adjustable Fuel Pressure Regulator
This will probably be the last "cheap" addition I will be able to do. Have added a HyperTech chip, Air foil, K&N filter with open air box, and done away with the cats and running true duals all the way to the stock mufflers in the back. (Tried FloMasters but it was a little too much rumble ). Everything else is stock. Need to know the correct fuel pressure setting. Also are there any more low budget improvements I can make before stepping up to the next $$$ level. I had thought about the TPS Throttle Performance switch. Has anyone tried it? :confused:
Melting Slicks
Joined: Dec 2000
Posts: 2,719
Likes: 59
From: Fremont Oh
Re: Adjustable Fuel Pressure Regulator (kyvette)
Kyvette,
The fuel pressure for an LT-1 is about 40 -41 psi. There really isnt much improvement with higher fuel pressure as you would find with the older L-98's. You can try bumping the pressure up a few pounds at a time to see if it helps your performance. However if you go too high it will casue your idle to roughen up.
As far asthe TPS performance switch... I'd save your money...
hope this helps...
Mo
The fuel pressure for an LT-1 is about 40 -41 psi. There really isnt much improvement with higher fuel pressure as you would find with the older L-98's. You can try bumping the pressure up a few pounds at a time to see if it helps your performance. However if you go too high it will casue your idle to roughen up.
As far asthe TPS performance switch... I'd save your money...
hope this helps...
Mo
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: Adjustable Fuel Pressure Regulator (kyvette)
Measure stock pressure to use as your baseline setting.
I run about 48psi but have some more air flow mods.
You could take it to the strip and make some back to back runs, bumping it by say 2psi each time, till trap speed drops off. Then back off 4psi.
I run about 48psi but have some more air flow mods.
You could take it to the strip and make some back to back runs, bumping it by say 2psi each time, till trap speed drops off. Then back off 4psi.
Melting Slicks
Joined: Dec 2000
Posts: 2,719
Likes: 59
From: Fremont Oh
Re: Adjustable Fuel Pressure Regulator (joseph p)
Joseph,
The book says anywhere from 41- 46 . My 89 I was running up to 50 and it seemed to wake the car up. However , everyones car is different. You may want to start with your baseline and bumpit aup incrementaly a few pounds at a time..
Mo
The book says anywhere from 41- 46 . My 89 I was running up to 50 and it seemed to wake the car up. However , everyones car is different. You may want to start with your baseline and bumpit aup incrementaly a few pounds at a time..
Mo
Team Owner
Joined: Aug 2000
Posts: 42,934
Likes: 18
From: Sydney, Australia
CI 6-7-8-9-10 Veteran
St. Jude Donor '07-'08-'09-'10-'11-'12-'13-'14-'15-'16-‘17, '22
Re: Adjustable Fuel Pressure Regulator (Mo_Bandy)
I bumped the pressure up a little on my car when I installed my AFPR. I didn't do any diacom readings or dynos runs to finetune things but I can say this, my mileage improved. The AFPR was the only mod I did at the time.
Melting Slicks
Joined: May 2000
Posts: 2,029
Likes: 63
Re: Adjustable Fuel Pressure Regulator (kyvette)
>about the TPS Throttle Performance switch. Has anyone tried it?
Yes, got it free from a friend who tried it and saw no difference in performance. I also tried it and noticed that my fuel consumption went worse. Took it off and everything returned to normal. Tried it again (drove a week with it) with same result - took it off for good. I noticed no change in performance one way or another.
You could remove the "frisbee" from your engine. This mod costs nothing and surely helps more than the TPS.
ToniH
[Modified by ToniH, 9:45 PM 3/5/2002]
Yes, got it free from a friend who tried it and saw no difference in performance. I also tried it and noticed that my fuel consumption went worse. Took it off and everything returned to normal. Tried it again (drove a week with it) with same result - took it off for good. I noticed no change in performance one way or another.
You could remove the "frisbee" from your engine. This mod costs nothing and surely helps more than the TPS.
ToniH
[Modified by ToniH, 9:45 PM 3/5/2002]
