I've seen numerous posts where people advised that stock injectors are good for up to 400 RWHP.
Yesterday, I once again saw a live proof of the fact that they are good and "safe" to use up to about 340 RWHP. My 348 RWHP car had them maxed out before peak power, so you get the idea yourself.

So if you plan to hit 340 RWHP with your setup, do not think twice about upgrading injectors. Go to 30# SVO directly.
I know some will disagree with me, and that is fine. I just thought I should let people know what I found based on repeated experiences.

 

thank you sir. good info. I would not want a maxed out injector while I am at wot/spraying.

Also bigger injectors will give me more headroom for those peak power moments that will eventually happen if I keep adding bolt ons.


Marvin

 

what base fuel pressure? I have made 420rwhp with 24lb/hr injectors.. upped base pressure tho.. 380 np on standard base pressure, with out maxing them....

 

do you have a cam that sits low in the powerband?
meaning you peak at like 4-5 grand or something like that?
wouldn't that be a reason because it would have to give mroe fuel higher up in the rpms right?
not sure if this would matter too much but..
i dont know, just taking a stab in the dark

 

Last time I scanned my car before it got really cold I was getting 91-92% duty cycle. Stock fuel pressure, I guess I'm somewhere between 330-350 rwhp.

 

how much hp are 30lb SVO injectors good for?

 

hmm comp 306 with a nice set of ported heads... guess i need to buy some fuel injectors

 

My stock injectors have been making almost 360 RWHP for over 60,000 miles at the stock fuel pressure. The injectors have over
100,000 total miles on them. Are they close to their maximum? Probably, but they have given me no problems.

 

Mine are still stock and stock FP. Dont know what the duty cycle is on them, but i know its not lean.

 

My car is the third car I've seen on a dyno maxing out at ~340 RWHP. I guess it may depend on the setup, but I had to add unreal numbers to get it in the right range. The injectors are low mileage too.

 

400RWHP and stock injectors.

If you are going to upgrade at least buy good injectors. GO with flow matched factory 'Style" injectors.

Mine max at 350RWHP but the AFR never getts out of hand. I am still under 13.0 at 7,000RPM.

 

Ellis, I thought you had GN injectors?

 

I would like to know this too, anyone know???

Brandon

 

The formula shows that they're good up to about 405 RWHP. (considering they flow 31.6# at 43.5 PSI)
I'm sure there are people out there that make more power than that just like you see in this post with stock injectors.

 

Are there any good 36# ers out there now that bosch discontinued making theirs? I saw lucas offers 38# ers. I'll be at about 410rwhp n/a and I wanted a little breathing room for a 100-150 shot.
Brandon