How far will 450cc injectors take a turbo Prelude? I've boosted up to 13 lbs with no retard or detonation, but that with 9:1cr pistons.

 

i wouldnt' try to push further than like 250-275whp with those injectors.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Eddiebx &raquo;</TD></TR><TR><TD CLASS="quote">i wouldnt' try to push further than like 250-275whp with those injectors.</TD></TR></TABLE>

Haha, STOCK injectors will almost hold that much.

I would say they will hold more than you'll ever pump out.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LudeyKrus &raquo;</TD></TR><TR><TD CLASS="quote">

Haha, STOCK injectors will almost hold that much.

I would say they will hold more than you'll ever pump out.</TD></TR></TABLE>

Yeah, with an FMU?? Here are some calculations i did on http://www.smokemup.com

250hp @ 80% duty cycle: 450cc injectors req.
275hp @ 80% duty cycle: 500cc injectors req.

345cc injections (92-96 Prelude VTEC) max out @ 190whp (80%DC) at normal fuel pressure.

or anyone???

 

whoops, didn't see WHP......let me do some more figurin.....

 

well that just threw me off....according to that site, the BIG stock H22 injectors will only handle about 230hp, w/ the USDM H22 and H23 injectors being at 80% duty cycle at the factory HP ratings!

That site also says the 450's should hit 80% at about 305hp.....is there any way that site could be off b/c of the fuel pressure our cars use or something?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LudeyKrus &raquo;</TD></TR><TR><TD CLASS="quote">well that just threw me off....according to that site, the BIG stock H22 injectors will only handle about 230hp, w/ the USDM H22 and H23 injectors being at 80% duty cycle at the factory HP ratings!

That site also says the 450's should hit 80% at about 305hp.....is there any way that site could be off b/c of the fuel pressure our cars use or something?</TD></TR></TABLE>

It really surprises you that Honda will throw in fuel injectors that max out at factory max hp? hehe.. listen to what you sayin' bud.

My guess is that Honda doesn't assume your going to upgrade your engine - the most efficient way to size an injector is to hit 80% at the hp your looking for. That way you don't get short(40%dc for example) high volume 'squirts' at your max hp. The engine would probably run like ****. Is this making any sence to anyone? because it's off the top of my head.

I'm pretty sure that site is accurate also. It would take a month to calculate if you throw in every variable that you can think of. It's a good guidline but will never tell you the whole story.

 

with that being true, the H23 injector 235cc is only good for 165hp?