Science of Speed return fuel kit REVIEW
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Joined: Nov 2010
Posts: 750
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Science of Speed return fuel kit REVIEW
Science of Speed's new return fuel kit for 06+
Parts
OEM parts are used wherever possible for best fit, finish, and reliability. Everything you need to convert the 06+ returnless to return style. Upgrades for AEM FPR and rail are available, as well as pumps at additional cost depending on power goals. I personally went with the AEM FPR and 320 E85 pump.
Instructions
I should preface that SOS installed this themselves, but the instructions are great (10 pages!). First it provides an introduction for recommendations and a list of all the parts so you can double check everything. The steps are each very detailed with plenty of pictures, diagrams, torque settings for each bolt, and some helpful advice to assist in the installation. It becomes very clear that the use of OEM parts comes together very cleanly in this kit.
Final fit and finish
Everything fits nicely where it should be, owing to the OEM parts. Even OEM terminals for the pump wiring are included. I opted to have an OEM fuel rail cover cut slightly and it came out looking great.
I'm having my idle trimmed up some but I'm hoping to have a new baseline done on 91 soon, and then an E85 tune after that.
Parts
OEM parts are used wherever possible for best fit, finish, and reliability. Everything you need to convert the 06+ returnless to return style. Upgrades for AEM FPR and rail are available, as well as pumps at additional cost depending on power goals. I personally went with the AEM FPR and 320 E85 pump.
Instructions
I should preface that SOS installed this themselves, but the instructions are great (10 pages!). First it provides an introduction for recommendations and a list of all the parts so you can double check everything. The steps are each very detailed with plenty of pictures, diagrams, torque settings for each bolt, and some helpful advice to assist in the installation. It becomes very clear that the use of OEM parts comes together very cleanly in this kit.
Final fit and finish
Everything fits nicely where it should be, owing to the OEM parts. Even OEM terminals for the pump wiring are included. I opted to have an OEM fuel rail cover cut slightly and it came out looking great.
I'm having my idle trimmed up some but I'm hoping to have a new baseline done on 91 soon, and then an E85 tune after that.
Joined: Mar 2010
Posts: 4,742
Likes: 211
Do you have the fpr getting vacuum off of the vacuum line for the OEM pcv valve? That might work but I wouldn't run it like that. I'd want the FPR going directly to the intake manifold vacuum. Should the OEM PCV valve fail/leak it won't read the correct pressure/vaccum. I see it's teed also, not sure where that Tee is going to, hopefully just a sensor.
Long story short, I'd fix that. Consistent fuel pressure is important, and the last thing you'd want is to be wondering why you're running lean because of a leaking/failed PCV valve. I realize they did that because there are likely limited vaccuum ports on the intake manifold, and Teeing it in is the only way to remain emissions compliant w/o changing things around, but I'd either disconnect the vacuum line from the OEM PCV valve or drill and tap another barb fitting in the intake manifold.
Long story short, I'd fix that. Consistent fuel pressure is important, and the last thing you'd want is to be wondering why you're running lean because of a leaking/failed PCV valve. I realize they did that because there are likely limited vaccuum ports on the intake manifold, and Teeing it in is the only way to remain emissions compliant w/o changing things around, but I'd either disconnect the vacuum line from the OEM PCV valve or drill and tap another barb fitting in the intake manifold.
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