boost/ vaccum referrance on aeromotive regulator ?
03-16-2016, 03:34 PM
#1
boost/ vaccum referrance on aeromotive regulator ? Ok so getting ready to install new fuel system in my nova, I have a aeromotive 13105 regulator which has a boost/vaccum ref port, is there any advantage In hooking this up to a vaccum port? I am not boosting the engine at this time , if I don't use it should I plug the port or leave it open??
thx!
thx!
03-16-2016, 09:54 PM
#2
Hook it up. It'll bring the fuel pressure down when the engine sees vacuum. Really no need for the fuel pressure to be way up at idle. When vacuum drops, fuel pressure will come up just like it should. Set the base fuel pressure at whatever psi your injectors are rated at (I'm guessing 43 psi) with the line disconnected, preferably with the engine running then hook the line up once set. You'll see the pressure drop which is totally normal.
03-17-2016, 06:40 AM
#4
Thanks 3 window I'll try that...but isn't base fuel pressure on these engines supposed to be 58psi?
Spade....the motor is a 6.0/lq4 with ls3 heads ,tsp intake,Texas speed cam
Spade....the motor is a 6.0/lq4 with ls3 heads ,tsp intake,Texas speed cam
03-17-2016, 11:18 AM
#5
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Nice looking car brother. I am doing a very similar build, 6.0l LQ9 procharged. I believe my stock motor hovered around 60psi fuel pressure. That was on a returnless system though.
03-21-2016, 07:02 PM
#6
9 Second Club
Ok so getting ready to install new fuel system in my nova, I have a aeromotive 13105 regulator which has a boost/vaccum ref port, is there any advantage In hooking this up to a vaccum port? I am not boosting the engine at this time , if I don't use it should I plug the port or leave it open??
thx!
thx!
03-21-2016, 07:36 PM
#7
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03-22-2016, 06:50 AM
#8
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And once again it depends what you're doing.
For years OEM's always referenced fuel pressure to manifold pressure.
More modern systems mainly for cost reasons...run dead end rails with regulator in tank, as per LS1 etc. They just run a fixed pressure.
So really for a n/a build, doesnt really make a damned bit of difference ( you'll of course be tuning to suit regardless ). For a boosted build it is always best to reference, but still not essential.
For years OEM's always referenced fuel pressure to manifold pressure.
More modern systems mainly for cost reasons...run dead end rails with regulator in tank, as per LS1 etc. They just run a fixed pressure.
So really for a n/a build, doesnt really make a damned bit of difference ( you'll of course be tuning to suit regardless ). For a boosted build it is always best to reference, but still not essential.