is the 5.3 silverado motor have the same block as the ls1?

Post by **motorboater** » Fri Feb 19, 2010 10:17 am

i am thinking about doing the swap and would like to know if the t56 tranny fits on it and the gto oil pan will? any helo be appreciated.

Post by **Eikon** » Fri Feb 19, 2010 1:59 pm

Yes, I believe you can interchange the 5.3, 5.7 and 6.0 Gen 3 SBC motors. So you'll be fine using the T56 and a GTO front sump oil pan. You'll want to pick up a car style intake as well because the tall truck intake will not allow your hood to close very well. Plus you'll need to swap to the ls1 accesories also.. the truck alternator sits too high.

Post by **motorboater** » Fri Feb 19, 2010 10:01 pm

thanks for the post. i planned on the intake. but didnt know about the alternator. ls1 are harder to get out here it seems and the 5.3 are everywhere for cheap. so i think i might just go with that.

Post by **Eikon** » Sat Feb 20, 2010 3:17 am

Yeah, the LM7 is a plentiful and very inexpensive motor.. but can still make pretty big power.

If you can get your hands on a LQ4, that would be better yet. Look for a 2001 and up 6.0L LQ4 out of a 2500 series truck. It's the same iron block as the 5.3, but bored out much more... As long as you are going heavy, might as well get the displacement to match. The 6.0L motor is great because you can bolt on a set of L92 heads and make a TON of power.. I've read articles that put it at 500 hp with those heads and a decent cam. Easy as pie!. Don't get the 99/00 model though because the crank was machined to fit only the 4l80e trans.. so you would need to swap cranks to get the t56 to mate with it.

Good luck with your build.

Post by **CCS200SX** » Sat Feb 27, 2010 11:38 am

iron or aluminium ..5.3 bore 96mm 5.7 ls1 bore 99mm, but 5.3 you can bore to 99...

Post by **slidestyle69** » Tue Mar 02, 2010 6:45 pm

CCS200SX wrote:
iron or aluminium ..5.3 bore 96mm 5.7 ls1 bore 99mm, but 5.3 you can bore to 99...

that would be only personal preference...taking the cylinder walls down that much is putting alot risk on a cracked sleeve if you add abunch of power additives. I would just get a 6.0 block and call it a day.

the bore is really the only difference between the besides some ls1's are 4 bolt main and the 5.3's are 2 bolt mains..correct me if im wrong when i say all 5.3's are 2 bolt mains..but the stroke is same pretty much between the two.

http://en.wakopedia.org/wiki/G...07.29

this link shows some useful info between all gm motors including the 5.3/5.7/6.0

Post by **C2CAHOON** » Thu Mar 18, 2010 1:31 am

any of the gen 3 small blocks are a good starting point, im partial to the 5.3 because of the smaller bore they rev quicker, if you rework a set of heads, cam, and an intake, you can put down 400+ and have more torque than you want

Post by **cnichols** » Mon Mar 22, 2010 8:21 am

C2CAHOON wrote:any of the gen 3 small blocks are a good starting point, im partial to the 5.3 because of the smaller bore they rev quicker, if you rework a set of heads, cam, and an intake, you can put down 400+ and have more torque than you want

The smaller bore won't help it rev much quicker or higher...it's such a small difference, piston weight will still be relatively the same. The 4.8 on the other hand, has the same bore as the 5.3, but a smaller stroke. Putting a 4.8 crank in a 6.0 block would be a nice combo as you would get a big bore and small stroke which would be more ideal for a high revving engine.

Post by **240cp** » Mon Mar 22, 2010 3:27 pm

slidestyle69 wrote:
the bore is really the only difference between the besides some ls1's are 4 bolt main and the 5.3's are 2 bolt mains..correct me if im wrong when i say all 5.3's are 2 bolt mains..but the stroke is same pretty much between the two.

I have never seen a lsx or lqx that is a two bolt or 4 bolt. That is in the older gen small block chevy's. I have been inside quite a few of the gen III motor, aluminum and iron and all that i have come across are 6 bolt. Four on top of the cap and two from the side.

Post by **kyhunter89** » Fri May 07, 2010 9:10 pm

all i've seen are 6 bolt. the l33 is iron 5.3 and lm7 is alum 5.3 btw

Post by **lq4powereds13** » Wed May 26, 2010 5:57 pm

kyhunter89 wrote:all i've seen are 6 bolt. the l33 is iron 5.3 and lm7 is alum 5.3 btw

You have that backwards, lm7 is iron, l33 is the alum version.

Post by **kyhunter89** » Fri May 28, 2010 11:06 pm

Your right... thats what happens when i state things off my head

is the 5.3 silverado motor have the same block as the ls1?

is the 5.3 silverado motor have the same block as the ls1?

Re: is the 5.3 silverado motor have the same block as the ls1? (motorboater)

Re: is the 5.3 silverado motor have the same block as the ls1? (Eikon)

Re: is the 5.3 silverado motor have the same block as the ls1? (motorboater)

Re: is the 5.3 silverado motor have the same block as the ls1? (motorboater)

Re: is the 5.3 silverado motor have the same block as the ls1? (CCS200SX)

Re: (C2CAHOON)

Re: is the 5.3 silverado motor have the same block as the ls1? (slidestyle69)

Re: is the 5.3 silverado motor have the same block as the ls

Re: is the 5.3 silverado motor have the same block as the ls

Re: is the 5.3 silverado motor have the same block as the ls

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