Adjustable fuel pressure regulator
Thread Starter
Instructor
Joined: May 2002
Posts: 187
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From: Cumming Georgia
Adjustable fuel pressure regulator
I want to replace the stock fuel pressure regulator on my LT4 with an adjustable model. The stock regulator has what appears to be a vacuum line attached to it. I don't think the adjustable reg.s have a home for that line. What do I do with it?
Thread Starter
Instructor
Joined: May 2002
Posts: 187
Likes: 0
From: Cumming Georgia
Re: Adjustable fuel pressure regulator (STL94LT1)
The pic included in the Mid America catalog did not look like it had one. I am not familiar with TPIS. Where did you buy yours?
Race Director
Joined: Jan 2002
Posts: 12,261
Likes: 85
From: O'Fallon Missouri
Re: Adjustable fuel pressure regulator (Ken Jarosz)
I bought the TPIS hat kit, where you cut the top off of your original regulator, and install this kit. It works great and only cost $50.
Thread Starter
Instructor
Joined: May 2002
Posts: 187
Likes: 0
From: Cumming Georgia
Re: Adjustable fuel pressure regulator (STL94LT1)
TPIS does not list the top hat option for the LT4 application. I sent them a note yesterday inquiring if that is a fact or just an omission on their tech data.
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Race Director
Joined: Apr 2000
Posts: 15,344
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From: Texas
Re: Adjustable fuel pressure regulator (Ken Jarosz)
TPIS does not list the top hat option for the LT4 application. I sent them a note yesterday inquiring if that is a fact or just an omission on their tech data.
Unless the factory regulator has failed or you modified or plan to modify the engine, you're wasting your money.
Thread Starter
Instructor
Joined: May 2002
Posts: 187
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From: Cumming Georgia
Re: Adjustable fuel pressure regulator (96GS#007)
Yes, I know that this is a bit of an "Easter Egg" hunt on my part. The whole issue started on the dyno a couple weeks ago with the fuel/air sensor picking up a rich fuel mix during testing. The tech suggested that I might reduce the fuel pressure (ala the regulator) to improve the horsepower.
Race Director
Joined: Apr 2000
Posts: 15,344
Likes: 4,008
From: Texas
Re: Adjustable fuel pressure regulator (Ken Jarosz)
Yes, I know that this is a bit of an "Easter Egg" hunt on my part. The whole issue started on the dyno a couple weeks ago with the fuel/air sensor picking up a rich fuel mix during testing. The tech suggested that I might reduce the fuel pressure (ala the regulator) to improve the horsepower.
Also keep in mind that lowering fuel pressure to lean the AFR can (tho not always) lead to a degradation in idle and part throttle driveability due to poor fuel atomization.
:cheers:
Team Owner
Joined: Dec 2000
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From: I have no tolerence for liberals and fools, but sometimes i repeat myself
CI 3-5-7-8-9 Veteran
St. Jude Donor '08
Re: Adjustable fuel pressure regulator (96GS#007)
if money isn't an issue aeromotive makes a great piece for $149, all billet
