96LT1Z

So my car is running and driving but before I get to have fun with it I need to get injectors and a tune. I'm looking at 39lb/hr and 40lb/hr injectors. That's what a couple of injector calculators gave me for an idea. Cam is 235/243, heads flow comparable to le2's, little more. Let me know what you guys think.

96LT1Z

Or would a 36lb/hr be fine?

Shownomercy

iTrader: (1)

Assuming 500fwhp, and 80% DC, you need 40# sticks.

96LT1Z

That's kind of what I had in mind. Just don't want to go to tune it and the guy say I'm way off in my injectors

Shownomercy

iTrader: (1)

Crank fuel pressure if you have to little injector, or just not worry about large injectors. Tuner gets paid to tune, so let him worry about it.

96LT1Z

Haha isn't that the truth. But I'm running stockers right now, so injectors aren't really and option, more of a must

Shownomercy

iTrader: (1)

Right, I'm just saying a decent tuner should be able to dial in "large" injectors to drive like stock. So grab 40# (although I think there are Ford 42#, which may be cheaper/easier to source) and have him toon.

96LT1Z

Cool I agree

96LT1Z

All of the EV1 style work right?

SS RRR

iTrader: (2)

Seems a little optimistic for just heads/cam?

Shownomercy

iTrader: (1)

I am just a optimistic ray of sunshine.

SS RRR

iTrader: (2)

and pixie dust.

96LT1Z

So I'm not predicting power numbers here, but can we agree on injector size?

ahritchie

iTrader: (1)

FWIW, I'm running 42# injectors on my 383 with a smaller cam than yours is.....I would say 42# injectors would be fine, you could get away with 30s or 36s, but they all cost roughly the same and you'll have more wiggle room for future upgrades! I figured maybe one day I might want the option to hit it with a 100-150 shot of nitrous to see what happens and I wouldn't need to upgrade injectors to do so!

You might want to look into the Racetronix fuel pump and hotwire kit too, the stock pump may no be able to keep up with feeding that beast for too long!

96LT1Z

Yeah who knows what the future will bring lol just really want to get this thing running good.

myltwon

iTrader: (1)

30# will do the trick for the average h/c car, but if you're spending the money might as well go bigger (without going overboard atleast). I'd say go with some 39 or 42#'s and have some wiggle room. Stay away from accell injectors, factory Fords are your best bet for low-cost, reliable injectors. 03-04 Cobras and Lightnings will offer quality alternatives at a reasonable price.

96capricemgr

iTrader: (1)

30lbs will feed a pretty nasty solid roller 383 like 500rwhp and nitrous doesn't matter unless spraying it dry which nobody will recommend with a stock computer and worthwhile shot.
30lbs will likely launch better too due to better low rpm atomization.

The injector calculators are about sales and while it is true 30-42 all cost about the same there are legitimate performance arguments to be made for staying on the small end.

RixTrix

Yes! The smallest injector that will provide adequate fueling will provide the best overall performance. A smaller injector will have a better spray pattern providing better atomization. Better atomization will provide a mixture that burns more completely (assuming correct AFRs). A more complete burn will provide increased efficiency (power & mileage).

Larger injectors tend to slobber or dribble at small opening times (reduced efficiency, poor idle and low speed performance, increased emmissions, etc).

This is why there are so many different sizes of injectors, instead of small medium and large.

I buy used injectors from injector shops on Ebay that are flow tested and matched. Due to the way injectors are constructed they will last millions of miles. Never had any problems.

Double Aught

iTrader: (5)

Just ordered these tonight for my Impala restomod. Stock 94 LT1 with headers and no cats.http://fuelinjectorconnection.com/sh...product_id=168

bowtienut

iTrader: (1)

SVO 30's. You're way under their limitations.
Anybody that knows how to extract maximum performance from these cars will agree.