Owners with Vortech Super FMU
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Joined: Mar 2001
Posts: 470
Owners with Vortech Super FMU
Almost done with the turbo setup. I should have it out of the shop by Saturday evening.
Just wanted some info on the Vortech Super FMU. I'm planning to run 5psi on stock everything. At 5psi, what fuel pressure should I expect from this system from idle to WOT??? I'm not sure about disc sizes, the thing is adjustable. Numbers would be good so I can gauge myself with the fuel pressure indicator.
Also, should I run the SFMU stand-alone or with the existing FPR???
Just wanted some info on the Vortech Super FMU. I'm planning to run 5psi on stock everything. At 5psi, what fuel pressure should I expect from this system from idle to WOT??? I'm not sure about disc sizes, the thing is adjustable. Numbers would be good so I can gauge myself with the fuel pressure indicator.
Also, should I run the SFMU stand-alone or with the existing FPR???
SFMU should replace your factory FPR. It's supposed to be the FPR and FMU all rolled up into 1 package.
For reference, thebigsadler's car hit 65 psi fuel pressure at full boost (5psi). At first, it was at 80 psi at full boost, but on the dyno this showed it was running way rich. Taking it down to 65 psi brought the A/F to a nice 12:1 which is really where it should be.
But different size turbos flow different amounts of air at the same psi. Do you also have an EGT gauge? That will really let you know if you're rich or lean. The best way to do this is to get it on the dyno, but I know a lot of people aren't near dyno facilities.
For reference, thebigsadler's car hit 65 psi fuel pressure at full boost (5psi). At first, it was at 80 psi at full boost, but on the dyno this showed it was running way rich. Taking it down to 65 psi brought the A/F to a nice 12:1 which is really where it should be.
But different size turbos flow different amounts of air at the same psi. Do you also have an EGT gauge? That will really let you know if you're rich or lean. The best way to do this is to get it on the dyno, but I know a lot of people aren't near dyno facilities.
Thread Starter
Senior Member
Joined: Mar 2001
Posts: 470
So between 60-65psi depending on turbo is the mark... Ok thats good and I do have an EGT gauge. I will watch temp. By the way, whats the ideal temp. If I position the probe right after the junction point where the two banks meet?? Should it be around 800 to 1000 F???
As far as dyno, thats a tuffy... I'm no where close to one.. I would need to rely on what I have at my disposal.
As far as dyno, thats a tuffy... I'm no where close to one.. I would need to rely on what I have at my disposal.
Originally Posted by Shadow
SFMU should replace your factory FPR. It's supposed to be the FPR and FMU all rolled up into 1 package.
For reference, thebigsadler's car hit 65 psi fuel pressure at full boost (5psi). At first, it was at 80 psi at full boost, but on the dyno this showed it was running way rich. Taking it down to 65 psi brought the A/F to a nice 12:1 which is really where it should be.
But different size turbos flow different amounts of air at the same psi. Do you also have an EGT gauge? That will really let you know if you're rich or lean. The best way to do this is to get it on the dyno, but I know a lot of people aren't near dyno facilities.
For reference, thebigsadler's car hit 65 psi fuel pressure at full boost (5psi). At first, it was at 80 psi at full boost, but on the dyno this showed it was running way rich. Taking it down to 65 psi brought the A/F to a nice 12:1 which is really where it should be.
But different size turbos flow different amounts of air at the same psi. Do you also have an EGT gauge? That will really let you know if you're rich or lean. The best way to do this is to get it on the dyno, but I know a lot of people aren't near dyno facilities.
Honestly everycar is slightly different, you cant just say 60-65psi FP on 5psi. Because on my car at 43psi FP I was 12.5:1 a/f flat lined on 5psi boost. Too many variables. You need to take it to a dyno.
Dixit
Dixit
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Senior Member
Joined: Mar 2001
Posts: 470
I see. Its pretty hard to dyno in the NY area. But thanks...
Originally Posted by BigDogJonx
Honestly everycar is slightly different, you cant just say 60-65psi FP on 5psi. Because on my car at 43psi FP I was 12.5:1 a/f flat lined on 5psi boost. Too many variables. You need to take it to a dyno.
Dixit
Dixit
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Senior Member
Joined: Mar 2001
Posts: 470
My Vortech SFMU costs $250. I' still have not yet installed it. I'll let you know the results.
Originally Posted by JDM4LIFE
how do you like your vortech sfmu? an fmu is basically the last piece i'm missing from my turbo setup, so i'm doing some comparison shopping... how much did you pay?
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