Vortech Super FMU help
#1
Moderator running more PSI than all the boosted Maximas... combined
Thread Starter
iTrader: (5)
Join Date: Aug 2000
Posts: 6,345
Vortech Super FMU help
I need help to figure out what's the right calibration disk/washer dia. to use.
V2 SC with 3.33" pulley. Most people suggest a rising rate 6:1.
http://www.vortechsuperchargers.com/...superfmuim.pdf
From looking at the fuel pressure chart, my best bet looks like the 3.62 disk/washer that's included in my Vortech Super FMU
Here's my math. It sounds about right.
For 3.62 disk @ 10psi of boost. The fuel pressure is at 100 psi. 100psi-35psi(static) = fuel pressure of 65psi. 65psi @ 10 psi boost = 6.5:1 of raising rate?
The same math for the next disk/washer down 2.72 would yield 4.5:1 of raising rate?
Am I right?
V2 SC with 3.33" pulley. Most people suggest a rising rate 6:1.
http://www.vortechsuperchargers.com/...superfmuim.pdf
From looking at the fuel pressure chart, my best bet looks like the 3.62 disk/washer that's included in my Vortech Super FMU
Here's my math. It sounds about right.
For 3.62 disk @ 10psi of boost. The fuel pressure is at 100 psi. 100psi-35psi(static) = fuel pressure of 65psi. 65psi @ 10 psi boost = 6.5:1 of raising rate?
The same math for the next disk/washer down 2.72 would yield 4.5:1 of raising rate?
Am I right?
#6
i thought the way it worked out is that if you get a 4:1 disk, for instance, for ever pound of boost you increase the fuel pressure 4 pounds.
so, with the 4:1 disk, at 10 psi that'd be an additional 40 psi of fuel. if you keep the stock fpr on there the total amount of fuel pressure would then be 83 psi (if the stock fpr had the fuel pressure at 43 psi with no vacuum).
i'm pretty sure this is how it goes and if it is that's why i totally avoid the fmu. they take the fuel pressure increase a bit too overboard in my opinion.
so, with the 4:1 disk, at 10 psi that'd be an additional 40 psi of fuel. if you keep the stock fpr on there the total amount of fuel pressure would then be 83 psi (if the stock fpr had the fuel pressure at 43 psi with no vacuum).
i'm pretty sure this is how it goes and if it is that's why i totally avoid the fmu. they take the fuel pressure increase a bit too overboard in my opinion.
Thread
Thread Starter
Forum
Replies
Last Post
KabirUTA13
5th Generation Classifieds (2000-2003)
19
10-17-2015 02:15 AM
pears
5th Generation Maxima (2000-2003)
15
09-18-2015 05:25 AM
Stagnet04
4th Generation Classifieds (1995-1999)
1
09-14-2015 11:28 PM