INTERNAL ENGINE MODIFICATIONS Valvetrain |Heads | Strokers | Design | Assembly

lq9 sleeper

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Old Oct 19, 2018 | 07:23 AM
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From: Wilson n.c.
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hi guys I just want some opinions on my build.its not a drag truck or race truck.its a daily driver/tow truck when needed but its a lq9 4l80e stock converter crew cab truck parts are

cam motion 214/220. 600 lift
tfs btr 220,215,or 225 heads
btr ported fast lsxrt intake
11.0 cr
1-7/8 headers 3in exhaust
hoping to make 420-450rwhp what do you guys think
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Old Oct 19, 2018 | 12:41 PM
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Sounds more like a race truck to me with that combo
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Old Oct 19, 2018 | 08:06 PM
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The LSX RT intake is a waste of money.

The cylinder heads are a pretty penny too, are they worth it? You can just mill the stock heads to raise compression up a little bit and gain some free horsepower.

That cam is pretty small to want to make 420-450hp to the tire through a 4L80e and 4x4 system. You are talking like a 120-140hp gain over stock to the tire, that's alot to ask for.
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Old Oct 19, 2018 | 08:55 PM
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Originally Posted by FFDP
The LSX RT intake is a waste of money.

The cylinder heads are a pretty penny too, are they worth it? You can just mill the stock heads to raise compression up a little bit and gain some free horsepower.

That cam is pretty small to want to make 420-450hp to the tire through a 4L80e and 4x4 system. You are talking like a 120-140hp gain over stock to the tire, that's alot to ask for.
Agree with LSXRT statement. go with NNBS or TBSS ( pretty much the same)
Heads are 100% absolutely worth it if wanting to make that 420-450 whp mark and keeping a nice DD friendly and tow friendly cam. I would get a custom ground cam for your needs though. Matt Gower of GPTuning handles all of my cam needs
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Old Oct 20, 2018 | 07:35 PM
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From: Wilson n.c.
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Originally Posted by FFDP
The LSX RT intake is a waste of money.

The cylinder heads are a pretty penny too, are they worth it? You can just mill the stock heads to raise compression up a little bit and gain some free horsepower.

That cam is pretty small to want to make 420-450hp to the tire through a 4L80e and 4x4 system. You are talking like a 120-140hp gain over stock to the tire, that's alot to ask for.
​​​​​​​its a 2wd
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Old Oct 20, 2018 | 07:41 PM
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From: Wilson n.c.
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this was my thoughts the cam is a custom grind from cam motion similar to a drop in truck cam that made 40rwhp on a 5.3 kip said that cam should put me in the 40-50 rwhp mark.last set of 243s heads cost to much.i bought the heads for $300 ship to tea there and back was aroud $60 got stg 2 port work with btr springs $1500 had to replace seals so that was 2k for the heads i can get the tfs as cast for the same price and i dont mind going with the tbss or the newer 5.3 intake
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Old Oct 20, 2018 | 07:45 PM
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From: Wilson n.c.
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i make 320 now basically stock so lets say 45rwhp on the cam 45rwhp on the heads and a ported tbss intake should be good for 20rwhp.so thats 110rwhp a 1-7/8 heads 3in exhaust should be 20rwhp so 430rwhp i would think
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Old Oct 22, 2018 | 08:39 AM
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Consider a converter. Will be worth every penny. Even for a daily driver.

Torqstorm
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Old Oct 22, 2018 | 08:53 AM
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Originally Posted by sbf
i make 320 now basically stock so lets say 45rwhp on the cam 45rwhp on the heads and a ported tbss intake should be good for 20rwhp.so thats 110rwhp a 1-7/8 heads 3in exhaust should be 20rwhp so 430rwhp i would think
Cam, intake, 1 7/8 LTs and 3.5" exhaust was worth 100whp on my 5.3.
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Old Oct 22, 2018 | 10:56 AM
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Even if you don’t go crazy with a converter, the K1 converter on 80s will stall to 2500rpm or so on a 6.0. Those cams won’t start making power until then anyway.
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