[AWDx4G63]

Hi,

Can anyone estimate the max HP possible on stock 450cc injectors? I personally think it is around 260 hp, maybe?

I think s15 250hp stock engine uses 480cc injector.... 450cc shouldn't be that bad.

Thanks,

Andrew

 

[SeatownGST]

Dunno, depends if you keep your stock pump/reg/rail etc.

You going to max out the stock fuel system? Watch out for fuel cut!

 

[DRW]

it's around 280 on pump gas and about 330 on race gas. You can squeeze more out of them if you get creative, like using water injection, higher fuel pressure.

 

[4SFED4]

If you do the math, @ 43 psi they are good for ~260 flywheel hp, so your guess is very accurate. With ample fuel supply and higher pressure they are capable of more, a max of about 320, I wouldn't suggest running above 65psi of base fuel pressure- 1 most fuel pumps are rated @ 43psi and raising the pressure too high actually lowers the output flow wise.