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Old 07-07-2011, 01:38 PM   #1
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another 5.3 LM7 build

watsup third gen, i figured since alot of people are doing ls swap's into a third gen, i'd go ahead and give it a shot.here is my parts list:

5.3 LM7 [X]
4L60E
spohn k member w/ lsx mounts
warlboro 255 pump
custom ground cam from texas speed
tea ported ls6 heads with beehive springs and tsp hardened rods
fast 90, or 92 whichever i can find
fast 90mm throttle body
fast fuel rails
stainless steel fuel line conversion
full spohn suspension

BODY & INTERIOR
4th gen dash assembly and console
front bumper
hood [X]
fenders

that's about all i'm gunna need to do the complete conversion and be able to get the car on the road... if there is anything i left out tell me and i will edit as i am new to these conversions. this project will hopeully kick off around january but as of right now i'm just rounding up parts

car started it's life as a 305 tbi automatic, sadly after 14,000 original miles the previous owner smacked it into a tree... the car was sitting up three years until i decided to buy it, not bad for 500 dollars, all of the interior is ment, it's all there, and it all WORKS!!!

may have gotten a 4.8 for trade, not a 5.3 but i've heard that the only difference between the 2 is the stroke and pistons... engine comes with ECM but no harness

Last edited by 1SICK90RS; 07-26-2011 at 02:15 AM. Reason: updating parts list
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Old 07-07-2011, 01:48 PM   #2
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Re: another 5.3 LM7 build

car started it's life as a 305 tbi automatic, sadly after 14,000 original miles the previous owner smacked it into a tree... the car was sitting up three years until i decided to buy it, not bad for 500 dollars, all of the interior is ment, it's all there, and it all WORKS!!!
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Old 07-07-2011, 02:26 PM   #3
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Re: another 5.3 LM7 build

may have gotten a 4.8 for trade, not a 5.3 but i've heard that the only difference between the 2 is the stroke and pistons... engine comes with ECM but no harness
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Old 07-07-2011, 02:56 PM   #4
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Quote:
Originally Posted by 1FSTBRD View Post
t56 transmission (4th gen camaro)
Make sure it's a '98-'02.
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Old 07-07-2011, 03:01 PM   #5
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Re: another 5.3 LM7 build

motor is supposedly a 2001
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Old 07-07-2011, 03:06 PM   #6
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Re: another 5.3 LM7 build

Quote:
Originally Posted by 1FSTBRD View Post
may have gotten a 4.8 for trade, not a 5.3 but i've heard that the only difference between the 2 is the stroke and pistons... engine comes with ECM but no harness
Pistons interchange, though LM7 was dished, LR4 was flat-top. LR4 had longer rods to go with the shorter stroke.
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Old 07-07-2011, 03:09 PM   #7
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Re: another 5.3 LM7 build

Quote:
Originally Posted by ronnjonn View Post
Pistons interchange, though LM7 was dished, LR4 was flat-top. LR4 had longer rods to go with the shorter stroke.
so if i change the rotating assembly i will have a 5.3?
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Old 07-07-2011, 03:32 PM   #8
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Re: another 5.3 LM7 build

Yes, but if you're going to do that, may as well get the block bored and make it a 5.7L.
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Old 07-07-2011, 04:26 PM   #9
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Re: another 5.3 LM7 build

Might want to upgrade from that LS7 clutch if you're going to be putting down more than 400rwhp.

Post up some eye candy, we love pictures here
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Old 07-07-2011, 05:55 PM   #10
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Re: another 5.3 LM7 build

idk how to post pics, i can post links?
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Old 07-07-2011, 07:45 PM   #11
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Re: another 5.3 LM7 build

pics can be seen here:
http://s869.photobucket.com/albums/a...birdboi79/1990 camaro rs
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Old 07-07-2011, 07:49 PM   #12
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Re: another 5.3 LM7 build

link above doesn't work, this one should:
http://s869.photobucket.com/albums/a...20camaro%20rs/
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Old 07-07-2011, 11:51 PM   #13
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Quote:
Originally Posted by 1FSTBRD View Post
motor is supposedly a 2001
I was talking about the T56. You said "t56 transmission (4th gen camaro)"; that could mean '93-'02. You don't want a '93-'97 LT1 T56.
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Old 07-08-2011, 12:20 AM   #14
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Re: another 5.3 LM7 build

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I was talking about the T56. You said "t56 transmission (4th gen camaro)"; that could mean '93-'02. You don't want a '93-'97 LT1 T56.
o ok, will look next time i'm at a junk yard...
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Old 07-09-2011, 09:27 PM   #15
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Re: another 5.3 LM7 build

guy hit the tree so hard that it wedged the drive shaft into the transmission
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Old 07-12-2011, 01:59 AM   #16
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Re: another 5.3 LM7 build

could someone provide me with a pin up for the 4.8 ECM? me and a buddy are going to try to tackle all of the wiring ourselves to save funds
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Old 07-12-2011, 03:59 AM   #17
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Re: another 5.3 LM7 build

Quote:
Originally Posted by 1FSTBRD View Post
o ok, will look next time i'm at a junk yard...
If you find a t56 of any sort at a junkyard, well, that's pure luck. T56 trans are hot items, you can realistically expect to pay close to 1,000 for a good one that doesn't need any work.
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Old 07-12-2011, 09:40 AM   #18
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Re: another 5.3 LM7 build

Quote:
Originally Posted by UnstableAviator View Post
If you find a t56 of any sort at a junkyard, well, that's pure luck. T56 trans are hot items, you can realistically expect to pay close to 1,000 for a good one that doesn't need any work.
X 2.... t-56's are not going to be found in a junk yard anywhere around here
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Old 07-13-2011, 06:59 PM   #19
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Re: another 5.3 LM7 build

found my headers today, they are 1 3/4 tubing with a 3 inch collector for $190. it's a kit from speedway motors so welding will be required...
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Old 07-14-2011, 05:11 PM   #20
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Re: another 5.3 LM7 build

Moderator, please delete this thread, it's gunna be a while before i can get around to ls swap
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Old 07-21-2011, 08:37 AM   #21
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Re: another 5.3 LM7 build

ok guys, ordering my 4th gen pedals shortly from hawks, and i was wondering, do i need to include the neutral safety switch, and brake switch, or will those even be necessary?
also getting the 4.8 sometime this weekend, from there i will begin the tear down, and rebuild process. i'll try my best to get some "eye candy"
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Old 07-21-2011, 10:19 AM   #22
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Quote:
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Moderator, please delete this thread, it's gunna be a while before i can get around to ls swap
Why do you think we'd do that?
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Old 07-21-2011, 10:20 PM   #23
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Re: another 5.3 LM7 build

idk, just figured that this thread was taking up valuable space and i was getting discouraged, now about the pedals??? kinda on the need to know basis, waiting to figure out what i need before i order them
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Old 07-24-2011, 03:22 AM   #24
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Re: another 5.3 LM7 build

UPDATE: got the crappy 305 and 700r4 out a few hours ago, getting the 4.8 tomorrow.
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Old 07-24-2011, 09:51 AM   #25
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Re: another 5.3 LM7 build

Quote:
Originally Posted by 1FSTBRD View Post
ok guys, ordering my 4th gen pedals shortly from hawks, and i was wondering, do i need to include the neutral safety switch, and brake switch, or will those even be necessary?
also getting the 4.8 sometime this weekend, from there i will begin the tear down, and rebuild process. i'll try my best to get some "eye candy"
Anybody??? also found a tremec t56 transmission kit, is it suitable for a 5.3?
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Old 07-24-2011, 10:19 AM   #26
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Re: another 5.3 LM7 build

I bought a nss from advance and I used my stock brake switch.
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Old 07-24-2011, 10:21 AM   #27
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Re: another 5.3 LM7 build

Quote:
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Anybody??? also found a tremec t56 transmission kit, is it suitable for a 5.3?
Post up a link to the kit.
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Old 07-24-2011, 10:28 AM   #28
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Re: another 5.3 LM7 build

Quote:
Originally Posted by ronnjonn View Post
Post up a link to the kit.

http://www.americanpowertrain.com/GM...T56-Basic.html
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Old 07-24-2011, 10:29 AM   #29
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Re: another 5.3 LM7 build

Quote:
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I bought a nss from advance and I used my stock brake switch.
so somewhere down the road i will end up needing the nss?
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Old 07-24-2011, 10:35 AM   #30
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Re: another 5.3 LM7 build

Wow!
If you have the funds, that'll get 'er done.
Heck, they probably even give you your choice of gear sets.
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Old 07-24-2011, 10:39 AM   #31
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Re: another 5.3 LM7 build

Quote:
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Wow!
If you have the funds, that'll get 'er done.
Heck, they probably even give you your choice of gear sets.
THEY DO, WHICH BRINGS ME TO THE NEXT QUESTION, WHICH GEARS ARE THE BEST TO GO WITH?
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Old 07-24-2011, 10:51 AM   #32
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Re: another 5.3 LM7 build

You shoulda seen this coming: Best for WHAT?
Surviving your future twin-turbo LS3 408? The 2.66 / 0.50 set. Strongest.
MPG? Same.
Driveability with a pure stock 5.3? depends on your axle ratio.
The 2.66 set has close ratios, good for keeping the revs down for MPG, or up for performance.
With close ratios, you don't have to rev as high before you can make each upshift. But when racing, the closer ratios keep the RPM from dropping below your powerband.
With that 0.50:1, and a 5.3, you'll probably need at least a 3.73:1 axle. Even so, that's about the same highway cruising result as a 700R-4 / 4L60E with a 2.73:1 axle.
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Old 07-24-2011, 10:27 PM   #33
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Re: another 5.3 LM7 build

Quote:
Originally Posted by ronnjonn View Post
You shoulda seen this coming: Best for WHAT?
Surviving your future twin-turbo LS3 408? The 2.66 / 0.50 set. Strongest.
MPG? Same.
Driveability with a pure stock 5.3? depends on your axle ratio.
The 2.66 set has close ratios, good for keeping the revs down for MPG, or up for performance.
With close ratios, you don't have to rev as high before you can make each upshift. But when racing, the closer ratios keep the RPM from dropping below your powerband.
With that 0.50:1, and a 5.3, you'll probably need at least a 3.73:1 axle. Even so, that's about the same highway cruising result as a 700R-4 / 4L60E with a 2.73:1 axle.
speak my language please

on another note, got the 4.8 today, due to weather and no place to work we just set her in the bay for now, pulling back out tomorrow to get measurements for motor mounts..

Last edited by 1SICK90RS; 07-26-2011 at 02:18 AM.
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Old 07-26-2011, 02:24 AM   #34
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Re: another 5.3 LM7 build

here are a few pictures of the car, i will post pics of the motor and hood i got when i get the time to take them
Click the image to open in full size.

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Click the image to open in full size.

Last edited by 1SICK90RS; 08-02-2011 at 09:12 AM.
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Old 07-26-2011, 02:25 AM   #35
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Re: another 5.3 LM7 build

more pics
Attached Images
File Type: jpg 4.jpg (37.1 KB, 8 views)
File Type: jpg 5.jpg (49.3 KB, 7 views)
File Type: jpg 6.jpg (63.8 KB, 9 views)
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Old 07-26-2011, 02:27 AM   #36
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Re: another 5.3 LM7 build

...
Attached Images
File Type: jpg 9.jpg (90.7 KB, 16 views)
File Type: jpg 10.jpg (59.9 KB, 10 views)
File Type: jpg 11.jpg (106.2 KB, 20 views)
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Old 07-26-2011, 08:04 AM   #37
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Re: another 5.3 LM7 build

Was it a theft recovery? All 4 tires flat, one shredded...gotta wonder
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Old 07-26-2011, 08:19 PM   #38
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Re: another 5.3 LM7 build

Quote:
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Was it a theft recovery? All 4 tires flat, one shredded...gotta wonder
na it wasn't a theft recovery, his son hit a tree a few years back and it's been sitting ever since, tires were completely dry rotted, but looked brand new before we put it on the trailer, it took us 5 hours to load it up, we started at 8:30 at night, finished up at 1:30 in the morning
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Old 07-27-2011, 01:26 AM   #39
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Re: another 5.3 LM7 build

ok guys, i need your help loacating a few sensors, such as the MAF, and also i need to know what the coil control plugins look like...
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Old 07-28-2011, 10:53 PM   #40
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Re: another 5.3 LM7 build

doing the wiring saturday, already got the motor back out and on the stand, goin to pertify it while it's out... planning on busting it off on the ground before it goes back in the car. pocket's "ls1 harness start to finish" thread is great help to anyone planning on doing the wiring themselves
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Old 07-29-2011, 07:09 AM   #41
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Re: another 5.3 LM7 build

hey i just wanted to give you this option on the T56, 93-97 LT1 T56's CAN be used in your swap, you have to change the front plate (mid plate, w/e u prefer) the input shaft and bellhousing to LS1 T56 parts. The 93 and 94 T56's are not as in demand due to lesser torque capabilites (93 M28 360 ft/lb, 94 M29 400 tq). Also the 93 M28's had a slightly different gear ratio. so id suggest 95-97 or the usual 98-02. I only tell people about this because you never know, you might find a random rebuilt or low mile T56 from one of those years cheap and when you swap the parts out, they can be sold to recoup the $$$. All parts needed to swap can be found on thegearbox. I couldnt find a reasonable low mileage or rebuilt 98-02 T56 so i bit the bullet and dropped $2K on an low mile MN12 from an 04 GTO. Good luck with whichever you decide.
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Old 07-29-2011, 07:21 AM   #42
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Re: another 5.3 LM7 build

Quote:
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hey i just wanted to give you this option on the T56, 93-97 LT1 T56's CAN be used in your swap, you have to change the front plate (mid plate, w/e u prefer) the input shaft and bellhousing to LS1 T56 parts. The 93 and 94 T56's are not as in demand due to lesser torque capabilites (93 M28 360 ft/lb, 94 M29 400 tq). Also the 93 M28's had a slightly different gear ratio. so id suggest 95-97 or the usual 98-02. I only tell people about this because you never know, you might find a random rebuilt or low mile T56 from one of those years cheap and when you swap the parts out, they can be sold to recoup the $$$. All parts needed to swap can be found on thegearbox. I couldnt find a reasonable low mileage or rebuilt 98-02 T56 so i bit the bullet and dropped $2K on an low mile MN12 from an 04 GTO. Good luck with whichever you decide.
thanks, but i've decided to go 4l60e route for now, but i'll definately keep that in mind..

fun begins now, got all of the harness off of the 4.8 and i'm about to start stripping it down, now would be a great time for pocket to come in...
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Old 07-29-2011, 07:41 AM   #43
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Re: another 5.3 LM7 build

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hey i just wanted to give you this option on the T56, 93-97 LT1 T56's CAN be used in your swap, you have to change the front plate (mid plate, w/e u prefer) the input shaft and bellhousing to LS1 T56 parts. The 93 and 94 T56's are not as in demand due to lesser torque capabilites (93 M28 360 ft/lb, 94 M29 400 tq). Also the 93 M28's had a slightly different gear ratio. so id suggest 95-97 or the usual 98-02. I only tell people about this because you never know, you might find a random rebuilt or low mile T56 from one of those years cheap and when you swap the parts out, they can be sold to recoup the $$$. All parts needed to swap can be found on thegearbox. I couldnt find a reasonable low mileage or rebuilt 98-02 T56 so i bit the bullet and dropped $2K on an low mile MN12 from an 04 GTO. Good luck with whichever you decide.
93 T56's cant be used. You have to change the input shaft which has 1st gear cast into it. 93's have a different 1st gear ratio and the gears wont line use

Whats up fstbrd?
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Old 07-29-2011, 07:50 AM   #44
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Re: another 5.3 LM7 build

right now i'm stripping down the harness unlooming it
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Old 07-29-2011, 09:54 AM   #45
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Re: another 5.3 LM7 build

ok so right now i'm trying to remove the wires from the pcm mounting thingy, but i don't want to F**K anything up, is there a special way you remove the pins???
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Old 07-29-2011, 10:58 AM   #46
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Re: another 5.3 LM7 build

Not really, they're the easiest to get out of any connector on the harness. No special tools are needed
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Old 07-29-2011, 11:11 AM   #47
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Re: another 5.3 LM7 build

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Not really, they're the easiest to get out of any connector on the harness. No special tools are needed
a little late pocket as i have all of the pins out, a thread on ls1tech taught me hownow just gotta untangle everything and repin, i still have the piece that went through the firewall of the truck, that's kinda holding me back right now, do i need to dismantle it as well?

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Old 07-29-2011, 01:23 PM   #48
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Re: another 5.3 LM7 build

Cut it off
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Old 07-29-2011, 07:36 PM   #49
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Re: another 5.3 LM7 build

ok guys, wiring isn't bad at all, all i have left is to splice all of the grounds and IGN wires back together, and repin and then start on the 3rd gen harness
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Old 07-31-2011, 12:17 AM   #50
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Re: another 5.3 LM7 build

not much of an update, but i'm still hung up on the wiring, probably would have been done yesterday but i've misplaced my black tape (gotta have alot of it) got the majority of the harness broke down and bundled up, still gotta break down the third gen harness and pin everything back up
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