ok here is my question roughly what size injectors will i need to make around 500whp @9:1 c/r

 

its been done with 720's before. i think mase did it on rondigs car, 530something i think

 

720

 

thanks

 

I would go with 880 or even 1000cc. You'll be maxing those 720's out.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TurboTegB18c &raquo;</TD></TR><TR><TD CLASS="quote">I would go with 880 or even 1000cc. You'll be maxing those 720's out. </TD></TR></TABLE>

 

I'm running dual fuel rails on my GSR turbo. I have 8 720cc MSD injectors for it.

Last thing I want is to run out of fuel.

 

As answered prior, go with an 880cc. You can do so with a 720cc injector by upping your fuel pressure of course. In my opinion always go with a bigger injector than needed because sooner or later you are going to need more power. Besides, the prices for a 720 and 880 are the same. As said before, you don't want to run out of injector because they you'll need to tune your fuel maps again for the new injector sizing.

With a good ems you can't even tell the difference between the idle of a 1000cc injector vs a 550cc injector in my opinion. But then again, that all comes down to the t00ner.