Fuel PSI
Thread Starter
On The Tree
Joined: Mar 2002
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Fuel PSI When you decide to change the fuel pressure psi how do you determine how high or low to make it? Can't it be done on the HPP3? How do you do it manually? Thanks.
<small>[ August 27, 2002, 01:46 AM: Message edited by: Norm ]</small>
<small>[ August 27, 2002, 01:46 AM: Message edited by: Norm ]</small>
TECH Fanatic
Joined: Nov 2001
Posts: 1,975
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From: SW Florida
Re: Fuel PSI Changing Fuel Pressure >
Can't be done with the stock fuel system thats installed in your f-body car.
If you want to change fuel delivery, invest in a MAFT. It is capable of making changes to your fuel injectors pulse width (on-off) time.
You will also need a product called ATAP (monitored with a laptop computer) to varify these changes. ATAP will tell you what voltage your O2 sensors are sending to your car's computer. This voltage will change based on what you have adjusted in the MAFT. In other words, when your at Wide Open Throttle (WOT), you set the MAFT to achieve an optimal O2 sensor voltage as read from your ATAP software on your laptop.
If your car is basically stock, why do you want to start messing with fuel delivery anyway?
Your LS1's computer (PCM) does a very very good job of setting the best air/fuel mixture on a [stock] engine. Don't mess with it until you start modifying with heads, cam, headers, etc.
Ron,
P.S. I see you have over 100 posts. I am suprised you have not read any threads on this subject in the past...
Good Luck. Just keep reading various posts, especially in the "Tuning" section of this board.
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<small>[ August 27, 2002, 05:44 AM: Message edited by: Kimchee and Rice ]</small>
Can't be done with the stock fuel system thats installed in your f-body car.
If you want to change fuel delivery, invest in a MAFT. It is capable of making changes to your fuel injectors pulse width (on-off) time.
You will also need a product called ATAP (monitored with a laptop computer) to varify these changes. ATAP will tell you what voltage your O2 sensors are sending to your car's computer. This voltage will change based on what you have adjusted in the MAFT. In other words, when your at Wide Open Throttle (WOT), you set the MAFT to achieve an optimal O2 sensor voltage as read from your ATAP software on your laptop.
If your car is basically stock, why do you want to start messing with fuel delivery anyway?
Your LS1's computer (PCM) does a very very good job of setting the best air/fuel mixture on a [stock] engine. Don't mess with it until you start modifying with heads, cam, headers, etc.
Ron,
P.S. I see you have over 100 posts. I am suprised you have not read any threads on this subject in the past...
Good Luck. Just keep reading various posts, especially in the "Tuning" section of this board.
________________________________________
<small>[ August 27, 2002, 05:44 AM: Message edited by: Kimchee and Rice ]</small>
Thread Starter
On The Tree
Joined: Mar 2002
Posts: 166
Likes: 0
Re: Fuel PSI I have read little bits and pieces on the subject. But I wasn't aware that I should wait until I get certain modifications done. I am planning on gettings some headers soon, but I don't think I will play around with fuel PSI for a LONG time. Thanks.
