injector questian

[darren C]

rite lads im just after buying a set of nismo 740cc injectors for my 180.

setup at moment..
sr20 black top
tomie pon cams
tomie rocker arm stoppers
denzo platinum plugs
trust front mount
s15 bb turbo
stainless manifold
full stainless turbo back
greddy boost controller
upgraded fuel pump
tomie intake hard pipe kit
hks mushroom filter
performance wise think dats it

now my questian is im after gettin a set off 740cc injectors and want to run these wit z32 afm and mapped on nistune.. are these injectors gonna work or are they too big??

[drift student]

they'll work fine once mapped. im sure.

[darren C]

im gettin very mixed answers on these from friends.. any1 else on here wit experiance wit um??

[Newsome]

Who ever is doing the map can set the fueling up for them. Granted they are over kill for an s15 turbo but there wont be a problem.

[darren C]

ya they are a bit much but got um at a very gud price so hoping to use if i can

[will_c]

740s are too big, better off with 550s the theory is that you use an injector that's closer to max duty cycle rather than too far away, because it affects injector spray pattern and therefore fuel atomisation. And if your fuel ain't been atomised properly, it can't burn properly and effeciently!! And s15 turbo basically can't flow enough cfms to support that fueling..

[darren C]

740s are too big, better off with 550s the theory is that you use an injector that's closer to max duty cycle rather than too far away, because it affects injector spray pattern and therefore fuel atomisation. And if your fuel ain't been atomised properly, it can't burn properly and effeciently!! And s15 turbo basically can't flow enough cfms to support that fueling..

dats they kinda answer i was lookin for in a way bt dunmno wat to do now..

any1 hav any other views on this???

[will_c]

My other view is get the injectors and a bigger turbo

You've potential for big power with that setup

[darren C]

i bought the injectors while ago so wat to do ???????????
its my road car so i want usable power.. 300 to 350 ish

[will_c]

S15 turbo will kinda struggle past 320ish tbh..

Sell/swap the 740s for 550s, get a gt2871r and the pick your power figure up to 400bhp!!