660cc me up

[wrc]

Easy question, fairly broad but just want a simple answer.

Forged Unit
HKS 1.2mm
GT3071R
Z32
Walbro + Direct feed from battery
Front mount
Etc all the usual little upgrades & mods.


660cc Injectors.... Are these going to hold me back come the RR tune? I have a nasty feeling they are...

What is gonna be the (ish) bhp limit at a) 3 bar fuel pressure. b) 4 bar fuel pressure



Danke.

 

[stumo]

Using a fuel pressure of 71psi (roughly 4.8Bar ie 3bar base pressure +1.8bar boost), 80% max duty and a BSFC of .62 and 660's will give you about 420hp which is less than a 3071 setup at 1.8Bar will give.

you'd be better using 800's which using the same setup as above gives about 500HP potential depending on how it's mapped (ie, more than a 3071 will do at that pressure)

 

[skiddusmarkus]

Easiest way I find to remember this is cc / 5 * 4 * duty cycle %(so 0.8 for 80%)= 422.4 more or less in your case.