what should my baseline fuel pressure be?

[tvmango]

what should my baseline fuel pressure be with my new engine?

when I get my combo done, what should I set my fuel pressure to, until I get a tune..

 

[Mustang5L5]

39psi with the vacuum line off and capped

 

[thegabrielles]

Damn that should run great, sorry not good with fuel pressures when it comes to that much motor, thats when I enjoy my Holley. SHould be around low-mid 40s though. Your supercharger setup should boost fuel pressure under fiull acceleration so I dont think I would go to high to start with. Definitely get it on the dyno for a good tune though.

 

[tvmango]

thanks man..
MUSTANG5L5
do you know the name of the place in mass who does all the mustang tunes?? I know of one who a specialist, i can't remember the name....

 

[Mustang5L5]

New England Dyno in Worchester??

All i can think off off the top of my head. Might want to make a post over in the northeast forum.

 

[tvmango]

New England Dyno in Worchester??

All i can think off off the top of my head. Might want to make a post over in the northeast forum.

I think your right!!! Thanks alot....

 

[SmockDoiley]

Um, Im pretty sure that 42 pounders will be a little large for your setup. My friend had the same setup but with a 17 lb Procharger and it was running like 9/1 A/F and JBA couldnt get it to tune. He ended up stepping down to 36's I think or something like that. The recommended the 42's for big strokers or really big boost engines. They pumped so much gas that it was actually getting way richer the higher the RPM's. Maybe JBA is wrong and I have a bum scoop but his car smelled like a lawn mower everytime he got on it.

 

[tvmango]

Um, Im pretty sure that 42 pounders will be a little large for your setup. My friend had the same setup but with a 17 lb Procharger and it was running like 9/1 A/F and JBA couldnt get it to tune. He ended up stepping down to 36's I think or something like that. The recommended the 42's for big strokers or really big boost engines. They pumped so much gas that it was actually getting way richer the higher the RPM's. Maybe JBA is wrong and I have a bum scoop but his car smelled like a lawn mower everytime he got on it.

I was asking about fuel pressure,,,,,,,, actually my injectors may be too small up top, but hey, what does vortech and dss know anyways...lol....Man you are in a bad mood or something? I've seen alot of angry posts from you last night.. Thanks for the tip on the D&D driveshafts though, I will get one from them..

 

[tvmango]

I'll start at 40 psi, thank you guys...

 

[SmockDoiley]

Let me know how it goes with the 42's. I dont have much faith in JBA since they are stupid. I'd love for your combo to rock so I have more ammo against them. That beast should rock though.

 

[D347643]

wait im confused, why would you cap off the vacuum line leading to the fuel press regulator? doesnt the vacuum tube lower the fuel pressure when at lower rpms/idle?

Drew

 

[Fox Saleen 163]

He means to pull the Vac line and plug it (so there are no vac leaks) while adjusting fuel pressure.