Thread: Anyone tried a Vortech SFMU
12-31-2008, 02:31 PM #1
Anyone tried a Vortech SFMU
Looking at the Vortech SFMU P/N 6X100-001. Looks like an all in one solution for fueling our skis. Comes with different pre-calibrated fuel curve rates and has an adjustable max and min pressure and adjustable rate curve as well. Just wondering if anyone has had any successes with this on their ski.
12-31-2008, 02:35 PM #2
12-31-2008, 02:57 PM #3
The problem with a 1:1 RRFPR is that it will give you a rough idle and will not maintain a proper AFR all the way down to idle. The 1:1 is good for keeping within a 11.7-11.9 AFR on the top end, but as you break away from that towards idle you will become more and more rich causing rough idle. The Vortech SFMU has verying rates of fuel curves which allows you to keep a more consistant AFR all the way down to Idle. This single RRFPR is capable of doing everything the dual regulator high boost setup is available in the store.
12-31-2008, 04:05 PM #4
12-31-2008, 04:09 PM #5
12-31-2008, 04:17 PM #6
Is it not true that a 1:1 rrfpr only rises the fuel pressure at the same rate as the boost? That therefor would not change the lb/hr rate of the injector across the whole band when under boost. The only time it would change is as you said at vacuum which is minimal. If youre using larger injectors this would cause a richer rate than normal at idle and through out the range except at WOT.
12-31-2008, 04:17 PM #7
12-31-2008, 04:22 PM #8
The RIVA ECU is mapped for the 50lb injectors up to 13.5lbs of boost. So the fuel output is controlled by the ecu and not the regulator. I am refering to if you keep the stock ECU intact.
12-31-2008, 04:55 PM #9
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12-31-2008, 05:19 PM #10
How much boost is your ski running. Sounds to me that your fuel pump is running full open. Anything over 11psi when the RRFPR is set at 60psi and your pump is maxed out causing the lower AFR. The fuel pump maxe3s out at 71psi.
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