i wunna get a 3inch exhaust and i heard i cant do that on stock fuel delivery.

do i need a bigger fuel pump and a fuel cut defender? and if i do can i make these three mods using the stock injectors?

 

yes. a 255 lph pump, full 3" needs a fcd

 

[quote name='fc3sboy1' date='Apr 13 2005, 11:15 AM']yes. a 255 lph pump, full 3" needs a fcd


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can i use the fp from an fd and are the stock injectors good?

 

even the stock fuel pump would be good if you re-wire it. (search for fuel pump re-wire). but you definitely need an FCD. Stock injectors are good to 255hp i believe.

 

[quote name='piston_killer' date='Apr 13 2005, 11:52 AM']can i use the fp from an fd and are the stock injectors good?


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an fd pump works very well

 

Ya with an fd pump Ive ran 14psi, thats almost maxing out the stock turbo.

 

Just got to add that with the FD pump and a FCD, the ecu will see the 7.5/8 lbs pressure and that's all, even when you're up to 10/11lbs. The FD/Walbro pump isn't going to give you any more fuel, it's just going to make certain you don't run out. I would strongly suggest you to increase the secondary injector size if you're not going to change the electronics to inject more fuel into the chambers.

 

With bolt ons and stock ports you shouldnt max out the stock injectors. Granted theyre in good working order.

 

DAMN!!! i lost my job!!! donations are welcome!!!!

 

[quote name='Dramon_Killer' date='Apr 16 2005, 01:37 AM']With bolt ons and stock ports you shouldnt max out the stock injectors. Granted theyre in good working order.


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That's not the point. A fuel cut defeneder, sends a different signal to the ecu. It tells it that it is under 8.5 lbs of boost, so that you do not hit fuel cut. So the ecu will supplying enough fuel for 8.5 lbs of boost, when you are actually producing 14lbs, which means you have a leaner mix. With higher flowing injectors you can even this out to an extent.



- Hand