how much hp can u get out of some 450's? And would a walbro 255 help getting to 300whp? Or is it not needed for 300whp?

 

YOU need to more specific there buddy...you boosted or n/a its pretty much useless unless boosted. All you going to do is over kill unless you have a strong built N/A. I put mine 450s in just to get a good idea how to run um and do a decent tune.Get what im coming from pimping

 

300whp is pushin it on 450's even with a walbro there almost maxed out at that point depending on your setup

 

It's a boosted z6 with big 16g turbo, and zex 59300 cam. Where can i get some injectors from on the cheap? How much whp would 750's support?

 

just check the forsale section.

 

Is your motor built, stock ,headwork other than the cam, front mount, what?, what kinda boost you runnin, and 750's will net you around a 450whp level on that pump

 

I run the 450cc at 53 psi tuned for excompany raceline and they run 78percent duty cycle making 238whp and 247 wtq on a f22bdohc with a ported 16g.

 

check the duty cycle value on your ROM editor

 

450's for 300 whp is plenty. My brother made 313hp with a t3 with his gsr and stock fuel pump. Then again, that was on a t3 and duty cycle was at 85-90%. As for a big 16g, i don't know. That's really pushing it for a small snail like that. I made 322hp on my 18g setup but that was with 750cc's ,a pump, and 14psi. Guess you won't know until you try.

 

Depends on what duty cycle you feel comfortable with. They can do over 300, but that's at 90-100%DC. You can get 550cc's from an EVO for cheap, and RX-7 injectors too. Also depends on how hard you push the 16g. 400+hp can be had from the big 16g, which would probably max out 550's, but that won't be happening at less than 25psi.