chestnuthillfrog

I Need Some Injectors For My 93 Lt1 Can I Use 24# Or Do I Have To Use 22# And Does Any Body Have Any For Sale?

roguedriver

24's will work but you'll have to change your tune so the computer knows you have 24's in there. You can find 24# SVO injectors all over ebay. New and used and the 24's are pretty reasonable in price.

Ken R.

chestnuthillfrog

how do u change the tune?

Injuneer

You need a new chip burned for the ECM.

chestnuthillfrog

i have a hypertech chip would that work?

Injuneer

Not unless you get Hypertech to burn you a new one for 24# injectors (programmed at 24.896#/HR for stock GM 24's).

n2ceptor

I have Accel #24s in my 93Z auto w/ hypertech thermomaster chip and no probs..... Still getting 22-24MPH highway......

roguedriver

Your probably running on the rich side though. Not really bad rich, but you'd probably make more power if you got retuned for the 24's.

Ken R.

1FstFormulaV8

I put Accell 24 lb. Injectors in about a year and a half ago. No tune. No problem. The ECM constants chop them down. I had nothing to worry about.

Injuneer

The problem is that the ECM long term fuel corrections can only pull 15% maximum fuel. That means you are using most of that capability up with the oversize injectors, and the ECM is going to run into a brick wall when the long terms reach 108. Then it will have to rely on the short terms, which is not a good idea.

All that applies to closed loop, part throttle/part load operation. When you go into power enrichment mode (=~ WTO) since the long terms were cutting fuel in closed loop, the ECM will default to Cell 18, or as a minimum lock the Cell 15 long terms at 128, and you will be running 10-15% rich.

LameRandomName

I love it when you talk dirty.