Z93

What size are the stock injectors on a 93 LT-1? I was thinking about installing bigger injectors but I don't know what size would be the best.My engine has a CC305 cam headers 52MM thottle body , mild port work on the heads SLP cold air intake and a custom chip by Ed Wright. Would bigger injectors help on a stock displacment engine?

roadhog_113

you can find calculators on-line to figure out what size injector to run. I think you should put in a Walbro 255 lbs/hr fuel pump and retune it after. You should see your numbers go up.

I wanna see some more opinions on this, don't take my word for it.

kinglt-1

iTrader: (26)

I would prolly put in 36# injectors. I think your stockers are 24#. you will need more injector with those mods for sure!

kinglt-1

iTrader: (26)

Fuel pump would not be a bad idea also. you could get by with out but it would be cheap insurance.

buffman

iTrader: (9)

I think the SD cars had 19# injectors?

Z93

I already have a Granatelli Motor Sports 255 fuel pump.

96capricemgr

iTrader: (1)

By buying a Granatelli you just gave a crappy company a cut because Walbro makes pretty much all the in tank pump available us.

The 93 came with 22lbs injectors, L99s and I think some TPI got 19lbs.

Bigger injectors only gain power if the old ones are failing or too small, can you scan it to check injector duty cycle at WOT?

96lt1m6

iTrader: (31)

TPI 305=19lb inj.

TPI 350=22lb inj.

LT1 350=22lb inj.(92-93)

L99 4.3 v8=22lb inj.

LT1 350=24lb inj.(94-97)
you would definately benefit from a fuel system overhaul,new inj.size will depend on your needs,255 lph
upgrade to 94-97intake w/fuel rail or modify the existing 92/93 to get optimal fuel distribution.

96capricemgr

iTrader: (1)

I had a L99, trust me 19lbs.

buffman

iTrader: (9)

Thanks for the clarification Dwayne