hmmm, i wished someone was selling a used vortech...

 

maybe private classifield?

 

looked, one's pending, no others... there was one that would have been perfect, but moved too late. there was another set up (HKS), but the install / tune was actually much more than the kit itself...

it's ok. i can wait. maybe

 

sorry if this has been asked before, can't remember seeing it.

what is a good A/F for vortech (or any SC) set up. I'm assuming no more than 14 (at WOT), and prob high 12's, mid-low 13's. What do you think

 

14.5~15 sounds good at idle. At open throttle 11.5 or little richer is fine.

 

Your wish has been granted. I'm considering letting my setup go. PM me if you're interested.

 

hi, didn't you just it on late last year? i'll send a pm tx

 

Guys what do you think is the best set up to go with. Vortech v3 tuner kit with 3.12 pully and 440cc dw injectors running high duty cycle or a bigger 600cc dw running less on he duty cycle?

The 440 will idle better but the 600cc will only need to run 60-80% duty clycle compared to the 80+% the 440 would need.

 

Either way is fine. I installed 600, just to be easy in future.

 

how do u guys calculate the duty cycle and whp for 650cc injectors? What is the whp for these injectors and still run around 85% duty cycle?

 

you dont calc it, its logged.

for me,
85% would be ~400 hp on a DD with 46psi base fuel pressure on a return system.
98% is 450 hp on the same setup

but there are lot of other people that are running that much HP on much smaller injectors, so who knows.

 

There's no way to calculate that based on IDC. You need to consider, intake air temp, air volume, fuel pressure, flow rates on the injectors at a given IDC point, et all.

 

Ya I know but after reading how u didnt have enough injectors on 600cc made me a little worried. I'm flying in a VPRO tuner from TX to tune my EMS and now my shop also thinks 650cc might not be enough injectors. I see GTM and others were able to make 500-550whp with 650cc so I don't know what's up. It would really suck to pay the tuners' expenses and not be able to get a good tune.

 

Did I say I didn't have enough injector? Honestly, I'd have to look .. but I'm certain that's not the case.

 

i would go with 1000 cc injectors if i had any other EMS.
these are inexpensive
http://www.350zmod.com/Precision-Inj...20injector.htm

 

Naw, I was referring to str8dum1 but what size of injectors are u running and wat's your duty cycle at?

I'm thinking about getting some 750cc just to be on the safe side before my tune. My question is will I have any doubts about hitting 550whp with 750cc injectors? And does our car take saturated or peak n hold? I cant remember

 

just go look at your dyno and correlate the rpms with your IDC. I have a few hundred logs of data to compare with so i'm know what "my" setup is doin.

 

if you have a UTEC, you have saturation, hi imp (me).
but if you have a Haltech/FCON, its best to use low imp peak and hold. Plus EMS can scale big injectors without hot start problems. I'm goin to overbuy my injectors with my next build. Probably 1200s with a dual walbro pump setup on a Haltech.

 

Actually I would still stick with the high impedance injectors. Traditionally low impedance has been the way to go due to response time. However, high impedance injectors have gotten much better and are now at the point that the response time is almost a wash between the two assuming it is a good brand.

There are a significant amount of EMS companies out there that now recommend high impedance over low impedance because the response times are the same but a high impedance injector can handle a higher duty cycle and still operate.

 

so our cars can handle either sat/low impedance injectors. I'm going with RC injectors since I alredy have the clips installed...what size should I go for 1000cc or 750cc and sat or low impedance?