eb02z06

iTrader: (18)

Hey guys-I just got an A&A kit for my 02 Z06. Andy recomends 42lb(SVO) injectors, but from what i'm told they are right at there limit. Typically the Z06 with his kit at 9lbs makes around 575-600 rwhp. I was looking at the Mototron( Seimans Deka) 60lbs instead to provide some extra cushion. I was also thinking the Holley 50's too. But after doing some searching I heard the 60's and 42's are easier to tune? What you guys recomend and willl tuning be an issue?

Thanks!

618HAWK

iTrader: (361)

I would go with the Mototron 60,s, easy to tune. I wish I would have installed these before my 42#s. Now I have to change again.....Do it right the 1st time. Have a few friends running as well with no problems.

longrange4u

iTrader: (2)

If 550 Is what your shooting for all you need is 42's. I have that at the rear wheels and my duty cycle for my injectors was 56% I belive.

ddnspider

iTrader: (26)

get 60#ers...that way you have room to grow.
longrange4u...is that at the stock fuel pressure or do you have a fpr?

Ed Blown Vert

iTrader: (2)

Mototron 60#

Slowhawk

iTrader: (12)

LPE pump, BAP, and 60lber's .I've found 42's run out at about 550rwhp on Vette's.

unit213

Get the 60lb'ers.

ddnspider

iTrader: (26)

Hey Don why do you prefer to run a BAP instead of dual intanks?

RedHardSupra

iTrader: (1)

i have a car with 390rwhp and 42s@58psi went over 60% duty cycle. how are you measuring it?

Slowhawk

iTrader: (12)

Because it's a Vette You can do dual pumps but it a pain.We've got 2 Vette's pushing over 700rwhp with the setup listed above so I stay with what works

eb02z06

iTrader: (18)

Thanks guys- the input is appreciated! So who has the best deal on 60lb injectors?

Matt@HSW

iTrader: (14)

Free shipping on injectors. Link. PM me for a coupon code if you are interested. Let me know if you have any questions.

Matt

Black LS1 T/A

That depends on how agressive your setup is.

I don't know what an A&A kit is. If you are N/A, 42's are probably fine and it will be easier to tune an idle. But, it you are going to boost that engine, spray it or increase the displacement, I'd consider the 60's.

eb02z06

iTrader: (18)

This is for a supercharged 346. I did a search over in the pcm and diagnostic section and it seems people are having trouble getting these 60lb'ers to idle? Has anyone figured out for certain if we have to play with the injector offset or what to get these to work-thanks!

Ed Blown Vert

iTrader: (2)

Hmm I guess I got lucky. I didn't change my offset. And mine idles like stock.

Mike @ New Era

iTrader: (10)

We have plenty of the Mototron #60 injectors in stock , they are $419 shipped to you . You can order them here www.neweraperformanceparts.com or call in during business hours at 585-865-1832 .

Thanks ,
Mike
www.neweraperformanceparts.com
sales@neweraperformanceparts.com
585-865-1832

Black LS1 T/A

Would the 60# Mototrons buy me anything over my 55# Siemens, or is that too trivial a change to help. I'm at 85% to 90% IDC at my current target peak RPMs (shift at 6600) and think I'm still a bit lean over 6400 RPMs (The cam is supposed to be good to 7200 with enough boost). I feel my power doesn't start to drop off until about 6800 RPMs.

LeMansBlue04

Well, at the risk of getting flamed I must tell you I think you run the risk of going too large with 60's. A&A has an excellent reputation on this forum as well as the Corvette forum. They have done many of these setups and they know what you need, if it were me I would follow their advice.

Here's something you might find interesting that surprised me:
I just finished building an NA 402 for my C5 with an A4 in it. I used the top end I had been running on my 346. AFR 205 heads, 90mm FAST intake, LG headers and SVO 30# injectors. It shifts at 6800 RPM and produced 470/461 at the wheels (almost 600HP at the flywheel). The max duty cycle for the injectors was only 80%. This was very unexpected since all of the injector calculators said I needed at least 41# injectors at 58 pounds of fuel pressure. In addition everyone on the forum was saying a 402 needs 42# injectors. It would seem that my actual BSFC is about .43, this explains why the calculators were wrong since I used a BSFC of .50 to do the calculations. My tuner had told me the SVO 30's would work and I followed his advise even though I had doubts. It turns out he was right.

I have read that too much injector can cause idle tuning problems. I have also learned that injectors need to be accurately sized to your needs on the bottom of the curve as well as on top of it. Bigger is not always better.

RedHardSupra

iTrader: (1)

402 needs AT LEAST 42s, if it doesn't, that means you got a leak somewhere and it's not getting the air it supposed to. you're correct, bigger is not always better, but 42s are not big at all. supras come stock with something like 53# and idle like a lexus at 650rpm, and are capable of 550rwhp+ on stock fuel system.
I played with a STS car with 60#'s in it and it drove completely like stock. if you have idle issues, that comes from tuners that don't know what they're doing, not the hardware. trust me, i've fixed HORRIBLE tunes from 5 different tuners (all sponsors on ls1tech, big companies that ppl trust completely with their tunes) and i was able to get the cars in much better shape within few hours. they want your money, and want you to think you need to throw more money at more hardware, instead of admiting lack of knowledge, care, and time.

ddnspider

iTrader: (26)

And your missing 1 very important factor....an NA motor and a Turbo motor are 2 totally different setups,you cant compare the 2.Im not trying to flame as you mentioned but your giving bad advice trying to compare his goal of at least 550rwhp and your 600fwhp,what was your A/F on your runs?probably around 13:1?His motor is going to want to be in the low to mid 11:1's, your talking about alot more fuel.He's going to be shooting for at least 80rwhp more than you with a much richer fuel curve,you have to realize that.