old lt1 versus new lt1

[Guest n4spd]

i just read on another post that the new lt1 has restriction problems? and that the older set up is much better to gain the hp wanted>? i just got a 97 lt1 with alluminum heads out of a firebird. should i be reconsidering my setup? i want to hit 500hp!

[Guest drfrankenstein]

from my personal experience with my lt1 camaro z28, 95 vette, caprices, impalas and my lt1 volvo that i had all in the past i can tell u that i have never had any restriction issues. i would use a obd1 ecu and harness though. and 500hp isnt a bad goal. one of my old B body buddies is pushin close that to the wheels in a 95 caprice with a 355 LT1 daily driver. i can tell you the LT4 top end kit and tuning is suppose to put u at like 425hp. so hell a lil porting and polishing here and there, and some more compression and meet your goal. check out PCm for less for tuning.

[rejracer]

I have a 94 impala ss which came factory with the iron headed lt1. You wont be restricted in power. There are many many many parts available for them. I strongly suggest going over to the impala SS forum. it's a great community over there and tons of information.

 

There are cheaper ways to attain power than the LT4 kit as well. Are your heads early castings? If they are the 97 castings you are a bit more limited as those castings have thinner walls than the earlier aluminum castings. Anywho.... go to the ss forum and check out the performance section. With 91k posts in that section alone... well lots of excelent info, ohh just don't go into the misc section, and you will respect that forum.. haha!

 

http://impalassforum.com/cgi-bin/ultimatebb.cgi