stevema10631

well im trying to finish up my nitrious install i just need one peice of information that i can not find

what is the fitting size for the fuel rail nipple on the LT1 thats where im tapping for fuel but i can not seem to find any fittings that fit

porksoda

iTrader: (39)

The fuel line from the noid to the fuel rail screwed right on for me.

stevema10631

what size AN fiting is on you line?

porksoda

iTrader: (39)

I guess that would have been helpful info for me to post! LOL But the lines are 4AN.

stevema10631

ok thanks i appriciate it ima go finishit it up right now

DAVE00

iTrader: (10)

Do you mean the schrader valve on the back of the rail?

stevema10631

yea that valve

DAVE00

iTrader: (10)

yup, it's a 4an size and you have to remove the valve first. Go to walmart or your local autoparts strore and get a $2 valve stem removal tool and it comes right out. Here is an illustration, courtesy of Shbox:

stevema10631

ok just making sure i have the stem remover and everything its just small odds and ends im am finihing up and of corse i have to go get a 4an hose as well as a 4an to 1/8th npt adapter now lol

DAVE00

iTrader: (10)

Yup, weird size I know, but at least you have it there to tap into. FWIW - Be real careful when tightening down the hose on the valve as the base of the valve at the rail is weak and can crack easily. I have a FP guage mounted on mine and recently over tightened it and didn't realize I cracked the base. Needless to say I drove it for 10-15 miles and kept smelling gas, and parked it to find fuel puddled under the car. It's a miracle I didn't set it on fire.