Conversions & Swaps LSX Engines in Non-LSX Vehicles
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lm7 or 5.3

Old 10-24-2011, 12:41 PM
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Default lm7 or 5.3

sup guys idk if this is the right area but here it goes..

so this weekend i picked up a 5.3 with all acessories from a friend for pretty damn cheap like 200 bucks cheap. it came out of an o6 something idk i think tahoe. but as far as the motor goes its really clean inside out like near new it has 706 heads


now after some research ive learned tht lq9 is better but ima work with wat i got being tht it was cheap *** hell . my goal is to hit at least 400 hp and this motor is not intended for drag racing or goin in a truck its goin in a bare *** 96 nissan 240sx with acage im using it for drifting thts it . so my ? is wht would it take to reach tht 400 hp (machining , porting heads, bigger injectors ,better intake, flat top pistons,cam, ect) .. any info will be appreciated im still doin more research on here .
Old 10-24-2011, 01:00 PM
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Originally Posted by driftboy10
sup guys idk if this is the right area but here it goes..

so this weekend i picked up a 5.3 with all acessories from a friend for pretty damn cheap like 200 bucks cheap. it came out of an o6 something idk i think tahoe. but as far as the motor goes its really clean inside out like near new it has 706 heads


now after some research ive learned tht lq9 is better but ima work with wat i got being tht it was cheap *** hell . my goal is to hit at least 400 hp and this motor is not intended for drag racing or goin in a truck its goin in a bare *** 96 nissan 240sx with acage im using it for drifting thts it . so my ? is wht would it take to reach tht 400 hp (machining , porting heads, bigger injectors ,better intake, flat top pistons,cam, ect) .. any info will be appreciated im still doin more research on here .
Your LM7/5.3 will give you the 400HP you want with a good cam and Valve spring swap. Thats all you really need to do. obviously running headers good exhaust and a Cold air intake will help your numbers.
Old 10-24-2011, 02:48 PM
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the lm7/5.3l is actually a pretty good motor. I can't remember the magazine but they did a article on building hp in one. If you google "450 hp junkyard 5.3L" it should pull it up. Like 74novacustom said, you can get close to it with a good cam, and springs. good luck man.
Old 10-25-2011, 12:46 PM
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kkooo
Old 10-25-2011, 02:37 PM
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Default Here is that link - 450 hp junkyard 5.3L

Originally Posted by Black98s10
the lm7/5.3l is actually a pretty good motor. I can't remember the magazine but they did a article on building hp in one. If you google "450 hp junkyard 5.3L" it should pull it up. Like 74novacustom said, you can get close to it with a good cam, and springs. good luck man.
Figured I would post it since I was looking at it.
http://www.carcraft.com/techarticles...e/viewall.html


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