Fast lsxrt questions
09-25-2017, 12:10 PM
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Fast lsxrt questions
I am planning on installing a fast lsxrt on my 08 silverado 6.0 cathedral port set up, after a lot of research I pretty much got it all down except for the fuel rails. I would like to run fast billet rails but not sure if I need to run a fuel pressure regulator, if so does someone have a pic of it or instructions on how to run one ?
09-25-2017, 10:20 PM
#2
Your better off running a different manifold. Speaking from experience, I had nothing but issues with mine. Trying to get it idle correctly then it leaked. Just get a holley or edelbrock manifold
10-04-2017, 05:27 PM
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10-04-2017, 08:21 PM
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how did your truck feel after the tune? Any noticeable difference up top and down low ? Also did you replace your coolant crossover ?
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10-04-2017, 08:35 PM
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I had to bend the hell out of my crossover to get it to fit but factory one works. Barely. Not much clearance at all.
You don't need a FPR. Just put an adapter from the FAST rails to your factory fuel line. Probably something like -6 AN port adapter that comes in the kit to a straight -6AN fitting. To short piece of line. To a 3/8 male quick disconnect. Something like that. Then run a cross over on the front. The first time around I ran a cross linked synthetic line but I heard stories about it can rot out and then I switched to a PTFE line.
You don't need a FPR. Just put an adapter from the FAST rails to your factory fuel line. Probably something like -6 AN port adapter that comes in the kit to a straight -6AN fitting. To short piece of line. To a 3/8 male quick disconnect. Something like that. Then run a cross over on the front. The first time around I ran a cross linked synthetic line but I heard stories about it can rot out and then I switched to a PTFE line.
10-05-2017, 08:39 AM
#9
Truck feels great after the tune - hard to really say if there was a difference between the TBSS I swapped out since the motor was fresh as well. PCM of NC sells a fuel rail cross-over for the LSXRT that works with the FAST rails if you're using them. I had them do the whole thing since they tune my ride as well. Happy with the whole set-up in the end.
10-06-2017, 05:39 PM
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Truck feels great after the tune - hard to really say if there was a difference between the TBSS I swapped out since the motor was fresh as well. PCM of NC sells a fuel rail cross-over for the LSXRT that works with the FAST rails if you're using them. I had them do the whole thing since they tune my ride as well. Happy with the whole set-up in the end.
does it matter if the crossover is in the rear or the front ?
