Lm7 & lt1 engines opinion
Thread Starter
Teching In
Joined: Mar 2009
Posts: 8
Likes: 0
Lm7 & lt1 engines opinion Hi guys, i have on my backyard an LT1 5.7 1999 and LM7 5.3 2003, which will you choose to make an offroad swap (NISSAN 1980 6SPEED MANUAL TRANS 4X4)
i am planning on using the original ecu
what do you think about those engines?
whats the best for you?
Thanks for your responses
i am planning on using the original ecu
what do you think about those engines?
whats the best for you?
Thanks for your responses
Teching In
Joined: Aug 2009
Posts: 9
Likes: 0
From: NW Houston-TX
I've run several LT1's and right now I have a 94 camaro setup in my wife's 70 camaro and a 5.3 in my 68 firebird and the LT1 camaro runs off and leaves my firebird. It's just a lot torqueier motor, and for off road, that's what you want. Just keep water off that opti-spark.
ive had 2 lt1 cars and as much torque as they provide 'off the shelf' i prefer to not deal with the opti/etc if i dont have to. Since theyre both iron it levels the playing field, but i think since the lm7 is part of the ls family youll have a much better time modding it, which i assume youd do (i would if i was doing a nissan swap 
... especially on an off road truck )
also, adjusting valves blows
... especially on an off road truck )also, adjusting valves blows
Go with the LM7, it's a much better platform to build up
BTW, thats not a LT1, or even a LTx engine. Its a vortec headed SBC. Notice the conventional location of the distributor. LTx engines moved it forward behind the balancer. Those CPI vortecs were not known for major power
BTW, thats not a LT1, or even a LTx engine. Its a vortec headed SBC. Notice the conventional location of the distributor. LTx engines moved it forward behind the balancer. Those CPI vortecs were not known for major power
BTW, thats not a LT1, or even a LTx engine. Its a vortec headed SBC. Notice the conventional location of the distributor. LTx engines moved it forward behind the balancer. Those CPI vortecs were not known for major power
the spider injection has it's issues.
That engine looks like ones found in late 90's trucks.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo Thread Starter
Teching In
Joined: Mar 2009
Posts: 8
Likes: 0
finally took out the 6 cyl engine, by now we are fixing some parts and modifing trans and clutch, got some trouble on geting flywheel but finally bougth one of 4.8 engine thats the same for 5.3 and 6.0.
i think will have some new trouble adapting throtlle to a mechanical one and waiting for start it, do you think engine will start with original ECU???? or will have to buy some open ecu like haltech or motech , etc
i think will have some new trouble adapting throtlle to a mechanical one and waiting for start it, do you think engine will start with original ECU???? or will have to buy some open ecu like haltech or motech , etc
Thread Starter
Teching In
Joined: Mar 2009
Posts: 8
Likes: 0
Hi guys, finally we modified all fitment and transmission stuff, so LM7 is on the way. we had to cut a little bit of firewall to make transmission stay in original position. by now our homework is make it run with original ecu, hope to have not much trouble on this, we have sensors and pedal with tac module , take a look, any comment is welcome
Thread Starter
Teching In
Joined: Mar 2009
Posts: 8
Likes: 0
Problem w ecu Hi guys, im having some problems when starting LM7 with original ecu on my 4x4 swap, it seems to be a problem with anti theft system , we are using maf, o2s, and other frequently used sensors, we have injection pulse, spark pulse and when we start it, it runs like 10 sec and then shut down, what do you think is going on? and what should i do? buy an open ecu is not an option right now.
thanks
thanks
