This last summer I found a caprice with a Lt1 motor in it so I took the intake home with me to convert it and now I'am wondering what size injectors it came with. At the time I tried to look for some numbers at the back of the motor to find out if it was a 5.7L but I really didn't know where to look but I do have the part numbers of the injectors here, out of the eight 7 are 17095004 and 1 has pn# 17124187.

 

ttt

 

Hopefully that motor isnt a 4.3 LT1. If it is an 5.7 LT1 i believe its 22lbs

 

I do hope it isn't a 4.3 Lt1...no such thing...is there??? Ummm, do you have a picture of these injectors. Look on the engine block itself at the back by where the ditributor goes in...it should be printed right there if it is a 5.0L or a 5.7L. HTH

Keiran

 

Well its to late for me to look at the block since I took it out of a car in toronto when I was visiting there this summer but I can tell you what they look like, black with dark grey on the bottom.

 

Sound like the Multechs. Most likely 22 lbs then

 

There is a 4.3L 265CID LT1. aka "baby LT1" It probably uses 19lbs injectors. While a 5.7L 350CID LT1 uses 24lbs injectors.


BLOCKS

350 - There are two blocks, one with two-bolt mains and one with four-bolt mains. They both have the same 10125327 casting number, so there’s no sure way to know which one you have until you get the pan off. However, if it came out of a Corvette, it should be a four-bolt block, and if it came out of anything else, it was supposed to be a two-bolt. GM used the two-bolt block for everything but the Corvette because it had plenty of strength and it weighed a little bit less.

265 - There was only one block used for the 265 cid version of the LT1. It’s a 10168588 casting that had the numbers "4.3" cast on the side, too. It’s real easy to spot if the heads are off because of the small 3.74" bore.

 

Very interesting! Never heard of that 4.3l V8 Then agian I don't go around playing with Caprices either. Thanks for the info.

Keiran

 

Actually, the L99 "baby LT1" 4.3/265ci uses 16pph injectors.

 

search for both those part #'s on these two pages..

http://www.tecnomotor.com.br/princip...azao-TM503.htm
http://www.powerpage.dk/produkter/pic/injectors.pdf


they are definatley corvette injectors.. but thats all i know

 

Those are 5.7l LT1 injectors. The 17095004's are original and the '4187 is a replacement. They are ~25#/hr @ 44psig. High impedence saturated.

RBob.

 

ahh didnt they use 4 bolt main blocks in trucks there bud???

 

The Vettes got the 4 bolt along with the trucks.

 

Thanks RBob

 

Yeah but those weren't LT1s since they never used LT1's in trucks.........