stock sr injectors

[lunchboxx]

can you make 300hp with stock sr injectors.... thanks in advanced

[vocationalzero]

I think that that is maxing out the injectors and you would be better off buying bigger injectors, maybe 555's or somethin. But with getting bigger injectors you would have to get your ecu remapped for the bigger injectors I believe.

[lunchboxx]

someone is trying to tell me that me made over 300hp with stock sr injectors on a 70 trim just wondering if it was true......

[david200095367]

its possible if you raise fuel pressure. i know a guy made 275 whp on 370cc on stock fuel pressure.

[240life]

its possible if you raise fuel pressure. i know a guy made 275 whp on 370cc on stock fuel pressure.

I just read this on sr20forums so I thought I would share it you can increase hp ratings by increasing f/p, for example, on a stock 370cc fuel injector @ 3bar=44psi=260whp/. 4 bar would increase pressure and allow better atomization, 4bar=56psi=290whp. Why would this actually be good though? Wouldn't the increased f/p cause the injectors to fail faster, by raising the duty cycle?

[supreamS14]

I just read this on sr20forums so I thought I would share it you can increase hp ratings by increasing f/p, for example, on a stock 370cc fuel injector @ 3bar=44psi=260whp/. 4 bar would increase pressure and allow better atomization, 4bar=56psi=290whp. Why would this actually be good though? Wouldn't the increased f/p cause the injectors to fail faster, by raising the duty cycle?

YES! Anything over 240-270whp and your asking for your injectors to fail. If you raise fuel psi they are more likely to get stuck open or fail. I make 270whp @10-12psi w/ a gt28r. I backed it down to 8 psi. I guess you could run race gas and maby hit 300whp but It's not worth the extra hp to take the chance of melting a piston/ braking your injectors.

[district_drftr]

we had my roomies car on the dyno with his s14 sr at the school yesterday and he has BC 264 cams BC valve springs and titanium retainers, the head is ported and polished and gasket matched, and has a megan manifold 02 housing down pipe and exhaust. the car has a fuel pressure regulator and the pressure was uped a little.

the car has no tune at all stock rpms and everything dynoed it to get a base for what its doing, and on stock boost it made 250wph and 248trq and it was starting to lean high in the rpms i then the air fuels went to 12.2 at one point which is pushing it to me.

im sure if he took in to 8,500 rpms it would have leaned bad and thats on stock boost, so i wouldnt stay on stock injectors trying to make 300. im sure its possible to do it but i wouldnt try it lol.