Black2001z06

iTrader: (32)

Here is the breakdown:

LME 427ci LSX

Block: LSX cast iron
Crankshaft: Callies Compstar 4.0” stroke
Rods: Lunati billet rods 6.125
Bearings: Clevite H-series rod, main, and cam
Pistons: Wiseco 4.125 9cc
Rings: Childs and Albert Fire Power
Camshaft: most likely around a 253/259 6xx/6xx 112lsa
Heads: MTI Stage 3 ls-6 heads, with head studs, and PRC dual valve springs
Roller Rockers: Jessel 1.7
Intake: FAST 90mm with NW 90mm TB

Injector: 30lb SVO's(not sure if these will suffice)
Fuel System: Racetronix 340 kit(I was told that this should support 650 rwhp).
I am also not 100% sure if the car has a volt blaster too.

I figure the car should be around 550/500 through an auto NA.


Will 30lb SVO’s be enough injector or should I upgrade to 42’s or above?
I know they flow at 36lb's, but should I go ahead and upgrade before the SD tune?
I never did get a chance to view/log the duty cycle of the injectors on my previous MTI 427ci motor.
Any help would be appreciated.
Thanks guys!

1320

iTrader: (6)

I d just put 60 in. No 30's wont cut imo.

slowbrakiller

iTrader: (10)

highly doubtful

ZL1Killa

iTrader: (17)

as long as you have AWESOME idle airflow to take advantage of the 60#ers which at our fuel pressure actually 72#ers, get the 60#ers. to further explain that reasoning, you will have a rich idle due to the injectors just being so durn big compared to the amount of air you are taking in for the motor

OTHERWISE:
stock is 28.8 on our ls1 cars from 01' year ; so i would guess for a 427 there is no way in hell reliably they will work

im currently running 430hp and 440tq roughly and using 42#ers which act as 48.8#ers at 58psi fuel pressure and im hitting 65%duty cycle

I would get 48 or 50's and you would be set

www.racetronix.com to give you an idea

ALSO http://www.rceng.com can make you anything you want and give you flow test numbers and bench them and EVRYTHING

Black2001z06

iTrader: (32)

I have been advised from many to go with the Siemens 60 lb/hr (630cc/min) high impedance injectors.
I just placed my order and they should be here in a few days.


Here are the specs(if anyone cares):
http://www.injector.com/specs/0560M....466bd1578eea06

Frost

iTrader: (45)

don't expect that pump to take you to 650rwhp either...

MeentSS02

iTrader: (11)

Did they also tell you how the spray pattern varies between the two? I'm curious...I run Bosch 30 lb/hr injectors in my bolt-ons car, but I never bothered to see what the spray pattern was like. They definitely behaved differently than the stock injectors when it came to adjusting the fueling though...