ANOTHER boosted 5.3 build with summit bottom end
#1
ANOTHER boosted 5.3 build with summit bottom end
Hello fellas. This will be my first LS engine build. My 5.7 in my GTO decided to give up on me after a track outing this past weekend, my fault i'm sure. I think I leaned it out too much. O well. Happens.
I've been having a spare gen 3 aluminum 5.3 on the stand for almost a year. My Plan was to build it and have it ready for when I have an issue, but I always procrastinate. Now after hurting the motor, I'm forced to do something. So after much contemplation and changing my mind and going back and forth on what I want to do, I decided I'm going to do a built bottom end vs a stock gen 4. One of my wise buddies (hes much better with money than me and seems to have better luck with stuff because he believes in do it right the first time) made a good point to me. I told him I was gonna stick the 5.3 in and build my 5.7, then swap them. He asked if I really like swapping motors or if I'd rather do it once and be done. Well I dont like pulling motors, so one and done sounds better to me. Plus its less money because if I do a dirty rebuild on the 5.3 then build the 5.7...thats two engine builds I'd have to pay for. So thats my reasoning for it, and I feel like it might be a little more forgiving if I rattle it (which how i'm building, you'll see I'm thinking about fuel choice and detonation).
So heres my plans. And I welcome any constructive criticism, if you are wanting to just be an ***, just think twice before you do it....because there no need for it. I'm always ears to ideas that have good reasoning or experience. I dont mind spending money (actually yes I do lol) for things that make my life easier or make things better. I'm hoping to make 800+ whp eventually, this engine should give me room to grow and not worry about it.
2004ish gen 3 5.3 aluminum block
Summit PRO LS Pistons and H beam rods 2000 arp rod bolts
-7cc Dish, 9:3:1 compression, 6.125 rod, longer than stock
ported 243 heads, probably going to do 6000 ferrea valves in them and get rid of the stock valves
JP racing single billet roller timing chan set
Summit Ghost cam
Clevite P series main and rod bearings
Durabond coated cam bearings
Stock oil pump, ported
factory oil pan gasket, timing chain and fel pro rear cover gasket and seal
Saccity Corvettes Billet dumb bell
Lifter: I think i'm gonna go with the morel drop ins
I decided on lower compression and a longer rod because I'm running pump gas. Past long rod motors I've built that were NA seemed to be more detonation tolerant and I'm hoping this helps this motor. Every little bit counts, right?
So as I get parts and do things, I'll post pics and my thoughts. I'm excited about the summit rods and pistons, they look like high quality parts from what I can see. My rods are on back order so it'll be a couple weeks before that stuff is here.
I've been having a spare gen 3 aluminum 5.3 on the stand for almost a year. My Plan was to build it and have it ready for when I have an issue, but I always procrastinate. Now after hurting the motor, I'm forced to do something. So after much contemplation and changing my mind and going back and forth on what I want to do, I decided I'm going to do a built bottom end vs a stock gen 4. One of my wise buddies (hes much better with money than me and seems to have better luck with stuff because he believes in do it right the first time) made a good point to me. I told him I was gonna stick the 5.3 in and build my 5.7, then swap them. He asked if I really like swapping motors or if I'd rather do it once and be done. Well I dont like pulling motors, so one and done sounds better to me. Plus its less money because if I do a dirty rebuild on the 5.3 then build the 5.7...thats two engine builds I'd have to pay for. So thats my reasoning for it, and I feel like it might be a little more forgiving if I rattle it (which how i'm building, you'll see I'm thinking about fuel choice and detonation).
So heres my plans. And I welcome any constructive criticism, if you are wanting to just be an ***, just think twice before you do it....because there no need for it. I'm always ears to ideas that have good reasoning or experience. I dont mind spending money (actually yes I do lol) for things that make my life easier or make things better. I'm hoping to make 800+ whp eventually, this engine should give me room to grow and not worry about it.
2004ish gen 3 5.3 aluminum block
Summit PRO LS Pistons and H beam rods 2000 arp rod bolts
-7cc Dish, 9:3:1 compression, 6.125 rod, longer than stock
ported 243 heads, probably going to do 6000 ferrea valves in them and get rid of the stock valves
JP racing single billet roller timing chan set
Summit Ghost cam
Clevite P series main and rod bearings
Durabond coated cam bearings
Stock oil pump, ported
factory oil pan gasket, timing chain and fel pro rear cover gasket and seal
Saccity Corvettes Billet dumb bell
Lifter: I think i'm gonna go with the morel drop ins
I decided on lower compression and a longer rod because I'm running pump gas. Past long rod motors I've built that were NA seemed to be more detonation tolerant and I'm hoping this helps this motor. Every little bit counts, right?
So as I get parts and do things, I'll post pics and my thoughts. I'm excited about the summit rods and pistons, they look like high quality parts from what I can see. My rods are on back order so it'll be a couple weeks before that stuff is here.
Last edited by Kfxguy; 11-16-2019 at 09:35 AM.
The following users liked this post:
Fitup_reid818 (02-06-2020)
#6
I have to keep telling myself that my buddy’s car went 8.90 with a 5.3, while I’m not planning on going that fast, it gives me hope and justifies the money I’m spending.
#7
"I MAID THEESE"
iTrader: (3)
So I'm doing basically the same build but 1/2 head studs, and O-ringing the block so I never lift a head .
Only critique.
Dont port your heads. Stock casting heads do not need to be ported on a bolsted application. It's just a waste of money . Stock ports flow more than the deck of the head can take . Basically you'll blow the deck of the head out before you need a better flowing head .
Only critique.
Dont port your heads. Stock casting heads do not need to be ported on a bolsted application. It's just a waste of money . Stock ports flow more than the deck of the head can take . Basically you'll blow the deck of the head out before you need a better flowing head .
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#8
So I'm doing basically the same build but 1/2 head studs, and O-ringing the block so I never lift a head .
Only critique.
Dont port your heads. Stock casting heads do not need to be ported on a bolsted application. It's just a waste of money . Stock ports flow more than the deck of the head can take . Basically you'll blow the deck of the head out before you need a better flowing head .
Only critique.
Dont port your heads. Stock casting heads do not need to be ported on a bolsted application. It's just a waste of money . Stock ports flow more than the deck of the head can take . Basically you'll blow the deck of the head out before you need a better flowing head .
they already ported. My thought process is the more I can make on the motor, the less boost I’ll have to use.
my buddy had (just sold) a 4th gen with a sbe 5.3, ran 30psi on arp head bolts, Felpro mls gaskets and it runs 8.90 at high 150’s. I was following his lead on that. I’m not really looking to run more than 18-20psi. Well that’s the plan. For now. Lol.
The following 4 users liked this post by ddnspider:
Che70velle (11-15-2019), Kfxguy (11-16-2019), Ls7colorado (11-20-2019), Project GatTagO (01-25-2020)
#10
12 Second Club
So, why can't you just build the 5.7 the same way you are planning on building the 5.3? You say that you hurt the 5.7. Is it so bad that you can't rebuild it? If it was me, I would put forged internals in the 5.7. There is no replacement for displacement.
#11
well first off, the cylinder walls are thicker on the 5.3
then I’m kind of in a hurry, 5.7 isn’t out the car and I CANT take it out right now. I’m building another turbo setup for a buddy and I have to mock it up on my car.
I’m hoping to get a little less fuel consumption with the 5.3....the 5.7 does suck fuel badly. I drive the car a lot.
I have the 5.3 on the stand torn down already. Parts already ordered for it. So I’m locked in
I hope that the 5.3 has a little less tq so my drivetrain has a better chance at survival
and no replacement for displacement? Well this comes to mind.....