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

450 Wheel hp lq4 build

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Old 05-26-2018, 07:23 PM
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Originally Posted by 86 IROC
I was just thinking....

Skeet's LQ9 based engine did 480 rwhp IIRC. LQ9 short block, ported LS3 heads, 23x/23x @ .050" cam, all the supporting mods... headers, injectors, TB, etc.

Post #3 he lists mods, weight, etc.

https://www.performancetrucks.net/fo...0/#post4452978
that lq9 has flattops though better compression
Old 05-27-2018, 06:45 PM
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Correct, 9.3:1 vs. 10:1 SCR. Most likely wouldn't notice more than a 10 HP difference - at the crankshaft.

You are looking for 450 rwhp, Skeet's set up could easily be duplicated and make 450+ with similar parts.

Just food for thought...
Old 05-27-2018, 07:35 PM
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Originally Posted by 86 IROC
Correct, 9.3:1 vs. 10:1 SCR. Most likely wouldn't notice more than a 10 HP difference - at the crankshaft.

You are looking for 450 rwhp, Skeet's set up could easily be duplicated and make 450+ with similar parts.

Just food for thought...
I think I have to go with a supercharger don’t have to rebuild it any already have it down to the block exept pistons crank rod cam going to put new oil pump barbell and clean up the heads. Should I replace lifters or keep the stock ones only 110k miles
Old 05-28-2018, 10:33 PM
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A new and better set of lifters are cheap insurance at this stage of the game. Should do a cam now, much easier now than later.

Me personally, would do cam, heads, intake now. Just cam it for a supercharger, then add one later. I always think I have "enough", then I get bored.
Old 05-29-2018, 03:08 PM
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Originally Posted by 86 IROC
A new and better set of lifters are cheap insurance at this stage of the game. Should do a cam now, much easier now than later.

Me personally, would do cam, heads, intake now. Just cam it for a supercharger, then add one later. I always think I have "enough", then I get bored.
I will do a cam, lifter spring push rods right now supercharger latter this summer next year some heads maybe ported 243s that is what will fit my budget so that is what i will have to do.
Old 06-03-2018, 06:45 PM
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Update: engine is all torn down list at the moment is new oil pump header exhaust supercharger cam. My concern is have it this far down should I just put high flow l92 heads and intake on it but I have no idea how to hook up the l92 intake that has no gas return line but my truck does and if everything els like sensor wires would hock up still?
Old 06-03-2018, 07:00 PM
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Originally Posted by Sierraman02
Update: engine is all torn down list at the moment is new oil pump header exhaust supercharger cam. My concern is have it this far down should I just put high flow l92 heads and intake on it but I have no idea how to hook up the l92 intake that has no gas return line but my truck does and if everything els like sensor wires would hock up still?
It's easy, C5 Corvette fuel filter, and a fuel transfer hose from the same car. Allows you to use the fuel rails on the newer intake and retain a return fuel system.
Old 06-03-2018, 07:43 PM
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Originally Posted by 86 IROC
It's easy, C5 Corvette fuel filter, and a fuel transfer hose from the same car. Allows you to use the fuel rails on the newer intake and retain a return fuel system.
so You mount it close to the tank and run a transfer hose to the old return line?

Last edited by Sierraman02; 06-03-2018 at 07:52 PM.
Old 06-04-2018, 04:53 PM
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Another question on that swap do all the sensors plug in even though it’s a diffrent generation?
Old 06-05-2018, 07:28 PM
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Originally Posted by Sierraman02

so You mount it close to the tank and run a transfer hose to the old return line?
Nope. It all hooks between your factory fuel lines in the engine bay and the rail on the new intake.


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