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Thread: LQ4 with stock lS3 heads
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05-31-2016, 01:03 PM #1
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red- 1970 Camaro
LQ4 with stock lS3 heads
I want to put a LS3 camshaft (or equivalent ) in my engine. I like keeping things designed to work together...together.
I don't want to go crazy with changing head springs or carving piston reliefs in my pistons. I want a nice street able engine. it will never see the track. The loppy idle would be add to the cool factor but not necessary.
So my question is , what modifications do I have to do to put a LS3 camshaft in my LQ4 engine? My LQ4 is a 2003 where the cam sensor is in the back.
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05-31-2016, 04:25 PM #2
Why not just go to any one of the dozen or so aftermarket cam manufacturers and spec out a bumpstick that will work with what you have?
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05-31-2016, 04:31 PM #3
I just saw your car at the bottom of your profile -- sweet! We have a '70 that we just picked up last August from the Rochester area. Great car and we have been thoroughly enjoying it.
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05-31-2016, 04:40 PM #4
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- May 2016
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red- 1970 Camaro
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05-31-2016, 05:54 PM #5
That makes sense. Is the LS3 cam a 1 bolt or 3 bolt design?
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05-31-2016, 06:50 PM #6
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red- 1970 Camaro
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06-02-2016, 07:21 AM #7
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- Apr 2010
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- Alabama
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Black/ Silver- 98 TA WS6/ 01 C5 Corvette
Are the knock sensors in the valley or the side of the block that will determine what you have to do. Mine are in the valley so that means I have to relocate a few things to make that work since its gen 3. Also the ls3 is a one bolt design not 3 like gen 3.
1998 Trans Am WS6 - Phantom
421 CI LQ9, Tick Performance Custom Cam, TFS 255cc LS3 heads, Kooks 2" LT headers, Kooks 3" True Duals w/ high flow cats, FTP 104 lid, Speed Density Tune, 4" silicon tube, LS6 VCT, FAST 102 Intake, NW 102 TB, Oil Catch Can, SLP Bilstein Shocks w/ Vogtland Springs, CTS-V 4-piston Calipers w/C6 Z06 rotors, Stainless Steel Brake Lines, R1 concepts premium rotors, Hawk HP+ brake pads, VFN WSQ Hood, C5-R timing chain, SLP oil pump, E85 tune, Walbro 450 fuel pump, Deatschwerkz 95# injectors, Breathless performance headlights, Frost Tune, !HVAC.
(Coming Soon) BMR DSL, UMI TQ Arm
421 LQ9 14.8:1 on E85 Build/
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06-02-2016, 09:19 AM #8
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Navy Blue Metallic- 98 T/A w/ mods, 00 FBVert
The one bolt is also for the Variable Timing that connects to the cam. Here's a couple of articles on it.
GM's Variable Valve Timing System Performance Test - Hot Rod Magazine
http://www.enginebuildermag.com/2014...-valve-timing/
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