720 secondaries and stock pump
#1
I am 2Furious
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720 secondaries and stock pump
I've got 550cc primaries, 720cc secondaries and a SAFC. RB 2.5" turboback exhaust. S4 T2. I still have the stock turbo fuel pump. I assume then that the fuel pump becomes the limiting factor in my tuning, so the question is how much psi of boost should I limit myself to?
#6
Banned. I got OWNED!!!
Originally Posted by NZConvertible
The pump is the first thing that should be upgraded. It should be done when a FCD becomes necessary. I wouldn't run 12psi on the stock pump...
I wouldn't even consider running 8psi or more on the stock fuel pump... At the very minimum you need a stock FD pump to handle 12psi, and you would be better off with a 20B/2JZ pump or a Walbro...
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#10
Sharp Claws
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maybe my pump was upgraded at one point in time but i seriously doubt it. currently i am running 10psi+ on a hybrid turbo with 4 720cc injectors and have no indications that the pump is near maxing out. the wideband is still pegged rich but i will probably upgrade the pump before doing the dyno tuning for 15PSI though.
#11
Banned. I got OWNED!!!
Originally Posted by Karack
maybe my pump was upgraded at one point in time but i seriously doubt it. currently i am running 10psi+ on a hybrid turbo with 4 720cc injectors and have no indications that the pump is near maxing out. the wideband is still pegged rich but i will probably upgrade the pump before doing the dyno tuning for 15PSI though.
At 10psi though, the stock pump is really starting to run out of headroom, and is working alot harder than it should be...
#13
Banned. I got OWNED!!!
Originally Posted by Karack
maybe, but the car was stock when i bought it so i have doubts it has been upgraded prior. difference is i am running it on a 12v constant feed and i have a standalone.
#14
I'm a boost creep...
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Originally Posted by Karack
difference is i am running it on a 12v constant feed and i have a standalone.
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