New LS3 heads
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Teching In
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New LS3 heads Just bought a set of these Flotek LS3 heads from Summit: FLOTEK 276cc LS3 cylinder heads Cylinder Head, 68cc Combustion Chamber, 276cc Intake Runner, 92cc Exhaust Runner. Intake runners seem quite large, but I will be running them on an LS3.Here's what I have: 2cc forged dome pistons, standard bore, long tube 1 3/4 headers, aluminum fabricated intake manifold mid-range runner ,102mm TB, and a 226/238 - .600/.600 -113. I am hoping I can push enough air through these heads... naturally aspirated. Any thoughts?
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Teching In
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Thread Starter
Teching In
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Deepmotor Low Profile LS3 L92 102 Fabricated Intake Manifold + Fuel Ra I picked it up in Ebay for $300 used, it was cheap enough and the RPM range is what I am looking for 2200 - 6800.
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Deepmotor Low Profile LS3 L92 102 Fabricated Intake Manifold + Fuel Ra I picked it up in Ebay for $300 used, it was cheap enough and the RPM range is what I am looking for 2200 - 6800.
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Teching In
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I bought this Camaro for $7000 because the engine was skipping and making a noise, but I knew it wasn't the bottom end. When I took it apart, I found out it sucked an intake valve, destroyed one head, damaged the other, and beat the heck out of on piston top. Because the intake was stuck open it blew a bunch of heat up into the manifold and melted that runner so it's no good. I looked everywhere for a factory intake but can't find one. The car is in great shape with only 98K 2ss and a 6 speed manual trans
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Well the backstory helps your cause and I'd maybe include that in the first post next time. I mean it will make power I'm sure, it's just been proven enough that the stock ls3 is pretty damn good in the typical hydraulic roller power range (under 7000) while most aftermarket intakes are not as good. I'd maybe have just replaced the piston, found a used head sent it, but what you are doing is fine and will work.
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Didn’t know the background but oem ls3 and tbss intakes are really good unless you go to fast, imo.
https://www.ebay.com/itm/39483996689...Bk9SR6Dp_8DpYg
https://www.ebay.com/itm/39483996689...Bk9SR6Dp_8DpYg
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Deepmotor Low Profile LS3 L92 102 Fabricated Intake Manifold + Fuel Ra I picked it up in Ebay for $300 used, it was cheap enough and the RPM range is what I am looking for 2200 - 6800.
Didn’t know the background but oem ls3 and tbss intakes are really good unless you go to fast, imo.
https://www.ebay.com/itm/39483996689...Bk9SR6Dp_8DpYg
https://www.ebay.com/itm/39483996689...Bk9SR6Dp_8DpYg
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I didn't say LS3 heads, I said those heads being at least 20cc larger. IMO for what he's doing they're just not right. He would be better off with stock LS3 heads actually. I just think a 280cc port on something with this purpose will be lazy as heck.
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From: S.F. East bay
New factory ls3 intake is under $300 dollars last time i checked….i bought one of those sheetmetal intakes years ago when i did my first 5.3 swap…10 years later and its still brand new un used in the box sitting in my garage, although i did end up using the 92mm throttle body, on both my ls3 intake and lsa supercharger and still running it to this day …..your heads will work fine and for what you plan on using the car for id say you gotta solid plan…..but i gaurantee your gonna pull that sheetmetal intake within a couple months and just replace it with a factory ls3 intake, did the fuel rails survive on the original intake? I wanna say i paid $225 for my ls3 intake from summit…those were pre-biden times though😂😂😂
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In that case the heads are "too big" and it will be lazy for its intended purpose. This is a case of bigger isn't better.
LS3 intake will outperform this one. These fabricated manifolds typically don't make good power. There's a reason they're so cheap and something from Wilson is 4x the price.
Without some sort of adapters(not a fan of) the TBSS intake is a mismatch to the LS3 heads. Cathedral intake and square port heads.
LS3 intake will outperform this one. These fabricated manifolds typically don't make good power. There's a reason they're so cheap and something from Wilson is 4x the price.
Without some sort of adapters(not a fan of) the TBSS intake is a mismatch to the LS3 heads. Cathedral intake and square port heads.
next time i will keep cathedral and rec port segregated.
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Teching In
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New factory ls3 intake is under $300 dollars last time i checked….i bought one of those sheetmetal intakes years ago when i did my first 5.3 swap…10 years later and its still brand new un used in the box sitting in my garage, although i did end up using the 92mm throttle body, on both my ls3 intake and lsa supercharger and still running it to this day …..your heads will work fine and for what you plan on using the car for id say you gotta solid plan…..but i gaurantee your gonna pull that sheetmetal intake within a couple months and just replace it with a factory ls3 intake, did the fuel rails survive on the original intake? I wanna say i paid $225 for my ls3 intake from summit…those were pre-biden times though😂😂😂
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You could sell that fab intake and pick up a fast 102 with long runners. Should be around 900 bucks. You will probably make well over 30-40 maybe even as much as 60 more lb ft of torque down low and as much as 15-20hp up top. Fab intake wouldn't make sense unless you are spinning to 75+. It would be such a dramatic change you would certainly need a retune.
This looks a lot like the sniper low profile manifold which had like a 4.5" runner. These manifolds could be great for boost or lots of rpm. Typically the shorter the runner the higher the rpm range of the manifold. I know it says 6800 but that's BS. Superchevy has multiple articles labeled intake manifold shootouts. Google it and read the results. You will get an idea of what short runner do with relatively mild engines.
This looks a lot like the sniper low profile manifold which had like a 4.5" runner. These manifolds could be great for boost or lots of rpm. Typically the shorter the runner the higher the rpm range of the manifold. I know it says 6800 but that's BS. Superchevy has multiple articles labeled intake manifold shootouts. Google it and read the results. You will get an idea of what short runner do with relatively mild engines.
Last edited by Bspeck82; Oct 21, 2023 at 10:34 AM.
A guy here on Tech has a bunch of LS3 intakes with injectors and fuel rails for sale. $350 each. Good reviews. Here’s a link…your welcome.
https://ls1tech.com/forums/market/1967012
https://ls1tech.com/forums/market/1967012
