Need help choosing injectors

[alone_and_insane]

Up to this point, I just planned on using my stock injectors. I emailed the guy I know at Livernois, and he said he was pretty sure I was gonna need injectors for my setup. Not really sure how I missed that before, so now I'm gonna have to get that figured out before a tune happens.

Now, I know nothing about sizing injectors. At all. Obviously I need enough fuel supply to keep up with how much airflow will be going in with the heads and cam, but as far as figuring out how much injector I need, I don't really know where to start. I have flow numbers from Jim for the heads, but I didn't get them flow tested after they were repaired and modified for the oversized valves. Here's the mod list, as it pertains to airflow stuff:

· Lunati Voodoo 60121 cam (Advertised Duration (Int/Exh): 270/278, Duration @ .050 (Int/Exh): 219/227, Gross Valve Lift (Int/Exh): .515/.530, LSA/ICL: 112/106, Valve Lash (Int/Exh): Hyd/Hyd, RPM Range: 1800-6000
· Custom ported aluminum stock heads with oversized valves
· EGR, AIR, and cat delete
· Pacesetter longtubes, custom true duals
· SLP cold air
· Smooth intake elbow, throttle body airfoil, de-screened MAF

I still have totally stock fuel systems, other than the braided stainless fuel lines.

So...anybody got some pointers?

[MP81]

Assuming you will be running gasoline, yes?

[alone_and_insane]

nope, converting to run on vegetable oil.













































of course gasoline

[farmington]

stockers should work for you. wait till they check the duty cycle on the dyno. mine were maxed out with my 224r cam and I went with 36# FAST injectors.

[alone_and_insane]

I was exchanging some emails with my contact at Livernois, and he said he was pretty sure I'd need more injector than that.

[farmington]

some do some don't. wait for your tune

[1BADAIR]

Svo30

[birdie2000]

x2

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[farmington]

Forgot you were LT1.

[alone_and_insane]

Svo30

x2

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Got a part number I could search for? Or brands I should stay away from? The cheap ones are $99 on fleabay from "Ultimate Components," which I'm sure is suuuuuper legit

Livernois keeps saying that I need 42#

[farmington]

ls1 and lt1 use different pressure pumps so the injectors are rated differently, ie. an injector rated as 30# in a lt1 is rated as 36# in a ls1

[DanDalessandro]

Livernois keeps saying that I need 42#

Dafuq are they smoking?

[birdie2000]

There are probably a lot of guys in the LT1 section of LS1tech that could give you good advice based on combos they've built.

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[DanDalessandro]

If you were at 400 crank, math says 32#. I don't know what kind of power you'll make on that cam
https://www.rceng.com/technical.aspx

[alone_and_insane]

I used a calculator here:

http://www.nitrostreet.com/injectors.htm

Says I need 30# or so. Here are a couple of options I've found:

http://www.americanmuscle.com/accel-fi-30lb.html

http://racetronix.biz/itemdesc.asp?ic=D3165BA&eq=&Tp=

http://racetronix.biz/itemdesc.asp?ic=D1720xx&eq=&Tp=