Guest 02WRX Posted November 13, 2003 Share Posted November 13, 2003 ok i know this has probablly been asked a 100 times but when i did a search i just couldnt seem to find what i was looking for among all the results. I want to do an LT1/t56 swap in my 71 240z i was reading that 95's were the best doner out of the corvette with the stock ecu. What i was wondering was if anybody knows of a place where i could find the engine with the ecu or seperatlly. i have been looking but i couldnt find much about where to buy the ecu, and any suggestions on where to find a good engine, if anybody knows a place that sells them or any info about this setup would be really appreciated, again i apologize about the newbie question and my poor search skills. thanks again. Quote Link to comment Share on other sites More sharing options...
dmyntti Posted November 13, 2003 Share Posted November 13, 2003 The Corvette engine isn't necessary. The only difference in the Vette engine was that it has four bolt mains. If you can't find a Vette engine you can usually fing one from a Camaro or Firebird on Ebay or the Fbody (Camaro/Firebird) sites. You can also get an iron headed LT1 out of a Caprice or Impala. The iron heads are reported to flow better than the aluminum ones but there is a weight penalty. Also be careful when getting an engine out of a Caprice or unknown doner because there is a smaller version of the LT1 that was found in some of the Caprices. I believe that the 94 and 95 engines are preferable because they are easier to reprogram and have the upgraded Optispark. Other years will still work though. I got a 96 Vette Lt1 that I pulled out of an 83 Camaro. This had already been converted over to a 94 Camaro computer. Check the Camaro sites for you engine they seem to be getting cheap these days. Quote Link to comment Share on other sites More sharing options...
Guest 02WRX Posted November 13, 2003 Share Posted November 13, 2003 hey thanks for all the great information dmyntti i will defenitlly check out those sites. Quote Link to comment Share on other sites More sharing options...
Guest Grenade300 Posted November 13, 2003 Share Posted November 13, 2003 The Corvette engine isn't necessary. The only difference in the Vette engine was that it has four bolt mains. So the camaro, firebird, caprice and impala LT1 has a 2 bolt main? Quote Link to comment Share on other sites More sharing options...
dmyntti Posted November 13, 2003 Share Posted November 13, 2003 Thats correct although I have heard that sometimes the Camaro/Firebird got the four bolt block. If you are going to build up for really high horsepower I believ it is desireable to get a two bolt main block and have it drilled for splayed four bolt main caps. Quote Link to comment Share on other sites More sharing options...
80LS1T Posted November 13, 2003 Share Posted November 13, 2003 Thats correct although I have heard that sometimes the Camaro/Firebird got the four bolt block. If you are going to build up for really high horsepower I believ it is desireable to get a two bolt main block and have it drilled for splayed four bolt main caps. I have also heard the same thing. From what I understand a factory 4 bolt main really isnt all that much better than a factory 2 bolt main when it comes to serious HP. Guy Quote Link to comment Share on other sites More sharing options...
Dan Juday Posted November 14, 2003 Share Posted November 14, 2003 I highly recommend getting everything as a package rather than in pieces. Hit the junk yards and try to find one that's intact that you can hear run and shift through the gears before they pull the motor. See if they will do a swappers special, everything you might need off the car for the swap for one price. That way if you forget something you can go back and get it without getting dinged ($) over and over. '93-'95 are OBDI, prefered ECU. '96 and up are OBDII. '93-'94 unvented optispark. '95 and up vacuum vented optispark. This is what makes '95 the most desireable model year. Quote Link to comment Share on other sites More sharing options...
Guest Your Car is Slow Posted November 14, 2003 Share Posted November 14, 2003 Also be careful when getting an engine out of a Caprice or unknown doner because there is a smaller version of the LT1 that was found in some of the Caprices What I think you meant is that some caprices came with smaller motors than the 350LT1...there is no such thing as a smaller LT1 in a Bbody Quote Link to comment Share on other sites More sharing options...
Guest jmil1974 Posted November 15, 2003 Share Posted November 15, 2003 Actually, some Caprices and Roadmasters came with 4.3 LT1 V8s. Yes, 4.3 V8s. I work in a Chevy dealership and have seen them and have friends who have worked on many of them. Just be careful. I forget how to tell by looking which one is the 4.3 . . . camaroz28.com forum will probably have the info you seek. Quote Link to comment Share on other sites More sharing options...
Guest Bresciano Posted November 16, 2003 Share Posted November 16, 2003 If your looking for an LT1 try this site, it shows you almost any possible engine combo available and where they are located at as well. It is very good in my opinion. http://www.car-part.com/ Francesco Quote Link to comment Share on other sites More sharing options...
Dan Juday Posted November 16, 2003 Share Posted November 16, 2003 Wow Francesco, great site! Thanks, I bookmarked that one. Welcome to Hybrid. Dan Quote Link to comment Share on other sites More sharing options...
Guest Your Car is Slow Posted November 16, 2003 Share Posted November 16, 2003 Actually, some Caprices and Roadmasters came with 4.3 LT1 V8s. Yes, 4.3 V8s. I work in a Chevy dealership and have seen them and have friends who have worked on many of them. Just be careful. I forget how to tell by looking which one is the 4.3 . . . camaroz28.com forum will probably have the info you seek. The 4.3 liter v8 motor is NOT an lt1. Quote Link to comment Share on other sites More sharing options...
Guest 02WRX Posted November 16, 2003 Share Posted November 16, 2003 do you guys know what kind of engine management darius runs, i was reading its a speed pro system but havent been able to find anything, im going to build my engine to handle boost and hope one day it will run boost. Quote Link to comment Share on other sites More sharing options...
Guest Your Car is Slow Posted November 16, 2003 Share Posted November 16, 2003 Lots of LT1 people use the FAST system...I plan on running a Haltec system. Quote Link to comment Share on other sites More sharing options...
Guest 02WRX Posted November 16, 2003 Share Posted November 16, 2003 where could i find informatip about these systems. up until this point i was going to run a stock setup but i heard that its hard to tune, any information about these setups would help alot thanks. Quote Link to comment Share on other sites More sharing options...
Guest Phailure Posted November 16, 2003 Share Posted November 16, 2003 Actually' date=' some Caprices and Roadmasters came with 4.3 LT1 V8s. Yes, 4.3 V8s. I work in a Chevy dealership and have seen them and have friends who have worked on many of them. Just be careful. I forget how to tell by looking which one is the 4.3 . . . camaroz28.com forum will probably have the info you seek.[/quote'] The 4.3 liter v8 motor is NOT an lt1. Hrm... If you read Grumpy's recent thread of links to LT1 info, the sites do mention that the 4.3s are LT1s... *shrug* Quote Link to comment Share on other sites More sharing options...
Guest Your Car is Slow Posted November 17, 2003 Share Posted November 17, 2003 Eh...guess you are right....first ive heard of that....doesnt really make much sense to me :/ Quote Link to comment Share on other sites More sharing options...
80LS1T Posted November 17, 2003 Share Posted November 17, 2003 So do the 4.3L LT1's still look the same on the outside? Like do they still have the same intake? Guy Quote Link to comment Share on other sites More sharing options...
Guest Your Car is Slow Posted November 17, 2003 Share Posted November 17, 2003 No clue..never seen one (or maybe I have)...according to the page the 4.3 and the 5.7 are indistinguishable from each other save some marking on the bellhousing (or somewhere near it). However this motor only came in Bbody platforms...every C4 Corvette and Fbody(93-97) has a 5.7L version of the LT1 Quote Link to comment Share on other sites More sharing options...
Guest BigE Posted November 17, 2003 Share Posted November 17, 2003 The "baby LT1" is engine code L99. It has a smaller bore than the LT1's. I had this discussion with a friend of mine, talking about the differences among the 2 LT1's and the L99. This is what he had to say: "Yeah their is a baby LT1 which is 10168588 casting it had the numbers "4.3" cast on the side of the block too. If the heads are off its real easy to tell since it has a small 3.74" bore. Now if its a standard 350 iron LT1 then you will see different casting #'s on the heads which were 10125320 or 12554290 castings depending on the year, with the 125...etc being I think the 96 version. Also the cam is different "milder" and setup for low end torque, and will have the #'s "600" or "779" stamped on the cam in front of the first lobe." Hope that helps. Quote Link to comment Share on other sites More sharing options...
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