720cc injectors too big??

[nolimits]

I have a set of new RC Eng 720cc P&H injectors not being used and have been unable to sell them, so I'm wondering if I can use them in my 91 GSX with the S-AFCII. Could I get a normal idle? Could I lean out enough to get good driveability and mileage? I am mostly stock currently and do have the Walbro 255lph pump. I know they're overkill, but it's what I have and I spent $700 on them so it'd be nice to use them!!

 

[Cirus_93TSI]

is it still stock turbo? if it is i dont think ur going to be able to adjust it enough to get it to run normal, those are damn big injectors for a near stock car
how much are u looking to sell them for(are they new?)? my friend was looking to buy some soon, he found a deal on some slightly used 660s for around 160 from a friend of ours but he wants bigger injectors then that, so depending on how much u want for them he might want to buy them since u cant really put them to use on ur car

 

[nolimits]

I actually bought them for my civic and used them for 2 mos. The motor is gone now and I'm building a new one for the car that won't require nearly as big of injectors. I threw them on ebay for $450 and then reduced it to $400...they're there now.

 

[marksae]

You can run with 720s and the SAFCII.

Adjustment = 450 / 720 - 1 = .625 - 1 = -37.5%.

I ran w/ 720s my 1g and it was fine. I had a re-wired supra pump and a charged air FPR. Base fuel pressure was set to stock, 38 psi w/ the vacuum line off. I didn't have any driveability issues.