I have decided to drop my Megasquirt. No one around my area wants to touch it and I am not inclined enough to tune it. Im pulling it off and going to the factory ecu. I am lowering my expectations for the power I wanted to make.Im pulling off my 780cc injectors and slapping on a set of 450cc's I currently have a 4g63t fuel rail with a 1:1 fpr. If I go with a S-FMU do what are my options for timing if I only want to run like 12-13 psi.
BTW I have a built motor top and bottom. I also have a walbro 255 pump as well.
#97955, "RE: Fuel/Timing for turbo setup" In response to Reply # 1
Not like you can actually do anything about it
I would def run an sfmu and play around with discs a bit. I think i used a 3:1 with 450's with 17psi base pressure. Some say you don't need an safc but I totally disagree. I only used the safc at 1000rpm and below trimming 50% fuel and I had perfect fuel trims with the 450's. No black smoke running pig ass rich either.
I eat emo kids for breakfast
1995 Eagle Talon (SOLD) 72' SuperBeetle 72' Standard Beetle 56' Deluxe Beetle
#97956, "RE: Fuel/Timing for turbo setup" In response to Reply # 2
Originally posted by Blizare Not like you can actually do anything about it I would def run an sfmu and play around with discs a bit. I think i used a 3:1 with 450's with 17psi base pressure. Some say you don't need an safc but I totally disagree. I only used the safc at 1000rpm and below trimming 50% fuel and I had perfect fuel trims with the 450's. No black smoke running pig ass rich either.
i agree, deff need an AFC for tuning below 1000rpm to have a nice idle.
#97957, "RE: Fuel/Timing for turbo setup" In response to Reply # 3
Still have one from my previous setup.
Ok so how is this going to work for the fuel I by passed the fpr thats in the rear towards the back and ran a return line to the fpr on the 4g63 fuel rail. With the SFMU does that mean I have to put the 420a rail back on?
#97958, "RE: Fuel/Timing for turbo setup" In response to Reply # 4
Originally posted by peter2.slow Still have one from my previous setup. Ok so how is this going to work for the fuel I by passed the fpr thats in the rear towards the back and ran a return line to the fpr on the 4g63 fuel rail. With the SFMU does that mean I have to put the 420a rail back on?
Run a line from the fuel rail to the side of the SFMU, Then your return at the bottom of the SFMU back to the tank.
#97975, "RE: Fuel/Timing for turbo setup" In response to Reply # 5
Carefull with the afc and trimming to much; cause advance in timing and you'll blow.
Been a long time since i've played with one but man.. there were quite a few motors that went because of this a few years back. Do a search to grab more info on it.
#98162, "RE: Fuel/Timing for turbo setup" In response to Reply # 6
Originally posted by Collente Carefull with the afc and trimming to much; cause advance in timing and you'll blow. Been a long time since i've played with one but man.. there were quite a few motors that went because of this a few years back. Do a search to grab more info on it. Nick 97RS
Got the S-FMU how do I know what disc is what? The 450's are swapped awaiting the S-AFC and Megasquirt is removed.
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