TPITuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.
Welcome to ThirdGen.org!
Welcome to ThirdGen.org.
You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join the ThirdGen.org community today!
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.
__________________ 89 T-Top GTA 5.7L T-56
ATI Procharger D1sc, AFR 195 Eliminator heads, ZZ9 cam, AS&M SS runners, Accel base, 58mm TB, 60Ibs injectors, Stainless Works LT 1 3/4 headers, Mufflex 4" catback, McLeod Street twin clutch, Moser Ford 9" with 3.70, 18" Boyd Smoothie II wheels 8"/10", DIY prom with code59. Stock short block
Miniram & Monoblade throttle body soon to be added.
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
__________________ 1985 Monte CarloSSw/89 L98 T.P.I 350
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.
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.
Originally posted by Tony89GTA 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.
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.
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 
