Please help. Fuel pressure drops with rpm
#1
Please help. Fuel pressure drops with rpm
Hi All
First, I did do a search and couldn't find anything.
I am guessing that my setup isn't close to being substantial for my engine. Here it is:
I just installed a LQ4 whipple 2.9L in my 73 Camaro.
I have a Ricks tank that has a tiny opening. I tried squeezing dual pumps in through the opening and they just won't fit.
I have a new Walbro 450 in tank right now with -8 feed, -6 return.
I drove the car a tiny bit last year and it seemed to be going lean while trying to gently accelerate.
I started the car recently and while in the garage I revved the motor up a bit, maybe to 1800-2000 rpm and I watched the fuel pressure drop from 43 to about 38. So I know that I have an issue.
Any recommendations to what I should buy would be appreciated.
Thanks,
Roman
First, I did do a search and couldn't find anything.
I am guessing that my setup isn't close to being substantial for my engine. Here it is:
I just installed a LQ4 whipple 2.9L in my 73 Camaro.
I have a Ricks tank that has a tiny opening. I tried squeezing dual pumps in through the opening and they just won't fit.
I have a new Walbro 450 in tank right now with -8 feed, -6 return.
I drove the car a tiny bit last year and it seemed to be going lean while trying to gently accelerate.
I started the car recently and while in the garage I revved the motor up a bit, maybe to 1800-2000 rpm and I watched the fuel pressure drop from 43 to about 38. So I know that I have an issue.
Any recommendations to what I should buy would be appreciated.
Thanks,
Roman
#6
Restricted User
Most fuel injectors are rated at 43 PSI. A lot of fuel systems have operated on that pressure at some point. Most after 1999-2000 operate on 58 PSI, except direct injection.