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Hi everyone, after a lot of reading I came close to finding a lot of info about 243 vs l92 heads/cam for different applications, most seem to lean toward strip/street. I have 69 Chevelle. Just purchased a '03 LQ4 6.0L. Was hoping to make the 420-450rwhp range with a cam/head swap. Car will be street only (w/ 200R4), so I don't really want it to idle like a tank. Will also be using the fuel system that came with the engine. So not sure if I should go with a mild cam & l92 heads, or wilder cam with the 243s. I've read the possibility of having to fly cut pistons if going with the l92, and want to avoid that if that's the case. Still a bit new to the whole cam/head swap. I'll continue reading but wanted to see what opinions were out there for my specific application.
Hi everyone, after a lot of reading I came close to finding a lot of info about 243 vs l92 heads/cam for different applications, most seem to lean toward strip/street. I have 69 Chevelle. Just purchased a '03 LQ4 6.0L. Was hoping to make the 420-450rwhp range with a cam/head swap. Car will be street only (w/ 200R4), so I don't really want it to idle like a tank. Will also be using the fuel system that came with the engine. So not sure if I should go with a mild cam & l92 heads, or wilder cam with the 243s. I've read the possibility of having to fly cut pistons if going with the l92, and want to avoid that if that's the case. Still a bit new to the whole cam/head swap. I'll continue reading but wanted to see what opinions were out there for my specific application.
Are you familiar with using the 200R4 with this engine?
Just checking, some find it difficult to hook up the TV cable with these Engines, if you are
familiar with it then no problems.
This will be my first time actually doing one. I've tried to read up a lot about them for my goal. And I've heard people can have issues. Care to elaborate? The more I know the better at this point.
For what you are doing, I would recommend getting some CNC ported 243 heads, FAST intake and running the Cam Motion Titan 3 camshaft. It will give you the drivability you want and should be able to produce about 450 RWHP in your vehicle. More than enough to run mid to high 11 second quarter miles.
For what you are doing, I would recommend getting some CNC ported 243 heads, FAST intake and running the Cam Motion Titan 3 camshaft. It will give you the drivability you want and should be able to produce about 450 RWHP in your vehicle. More than enough to run mid to high 11 second quarter miles.
I've read the l92 heads "flow better" than the 243s, or about the same if the 243s are ported, but then you're in the same price range as a new set of l92s, and I noticed that the 243s are a little cheaper to begin with. For the lesser price are you really getting that much less? The FAST intake seems a little high in price for my build (trying to keep it under $4300, w/ trans). Could you recommend an intake within the $400 range? The Titan 3 cam is about where I figured I might come for cam duration and pricing. But their website says it's designed to be used with, "...rectangular port LS3/L99/L92 style heads". Any issues with running it with 243s? I may not switch out the intake immediately, and may run with the truck intake for a bit to stay within budget, how bad would this affect driveability at this point?
Originally Posted by 293LSX
You can make 550 flywheel with a 6L, ls3 heads gmpp single plane, and a mild cam. I believe hot rod mag did this in 2009.
Yeah, I read a dozen or so articles from them regarding the 4.8s, 5.3s, and 6.0s. What's your idea of a "mild cam"? Poster above (speedtigger) suggested Cam Motion Titan 3. The duration and lift is roughly where I've seen other people build for a streetable/driveable machine.
I've read the l92 heads "flow better" than the 243s, or about the same if the 243s are ported, but then you're in the same price range as a new set of l92s, and I noticed that the 243s are a little cheaper to begin with. For the lesser price are you really getting that much less? The FAST intake seems a little high in price for my build (trying to keep it under $4300, w/ trans). Could you recommend an intake within the $400 range? The Titan 3 cam is about where I figured I might come for cam duration and pricing. But their website says it's designed to be used with, "...rectangular port LS3/L99/L92 style heads". Any issues with running it with 243s? I may not switch out the intake immediately, and may run with the truck intake for a bit to stay within budget, how bad would this affect driveability at this point?
The L92 heads can work too, but in your case, I like ported 243s. The reasons are these:
1.)243s have a smaller combustion chamber than LS3/L92 heads, so more compression.
2.) The 243 have smaller valves allowing a more valve clearance.
The downsides:
1.) Ported 243s will cost about 2x what a set of used LS3/L92 heads cost
2.) It requires a FAST intake to get the best out of the 243s whereas a stock LS3 intake works great and are about 1/2 of the cost of a FAST intake.
So, from a price standpoint, the LS3./L92 setup is the best deal. From a performance standpoint, the higher compression may give the 243 build the edge.
In regards to the Titan 3 camshaft. There is a Titan 3 LS3 cam and a Titan 3 LS1 camshaft. There are in their own sections of our website.
The L92 heads can work too, but in your case, I like ported 243s. The reasons are these:
1.)243s have a smaller combustion chamber than LS3/L92 heads, so more compression.
2.) The 243 have smaller valves allowing a more valve clearance.
The downsides:
1.) Ported 243s will cost about 2x what a set of used LS3/L92 heads cost
2.) It requires a FAST intake to get the best out of the 243s whereas a stock LS3 intake works great and are about 1/2 of the cost of a FAST intake.
So, from a price standpoint, the LS3./L92 setup is the best deal. From a performance standpoint, the higher compression may give the 243 build the edge.
In regards to the Titan 3 camshaft. There is a Titan 3 LS3 cam and a Titan 3 LS1 camshaft. There are in their own sections of our website.
Ah ok. Guess I have some considerations to make. Will also go check out the subs for the camshafts.
On another note, since I'll be using the ECU, wiring harness, and fuel system that comes with the engine, did any of you install any kind of CED light or OBDII port? Suggestions? I've been wondering how to alert myself if something starts running poorly other than waiting for it to run like crap, or constantly keeping checking the specs like regular maintenance.
In regards to the 200 4r . I used the kit from bowtie overdrives for my swap works good just a pain to get adjusted to where i liked it. but no real issues. you can see in pic. mine was a vortec but same throttle body setup
In regards to the 200 4r . I used the kit from bowtie overdrives for my swap works good just a pain to get adjusted to where i liked it. but no real issues. you can see in pic. mine was a vortec but same throttle body setup
Niiiiiice. That's what I'm going for. Any tips for the TV cable? I still need to read up on setting it up and adjusting it, but any info would be helpful. Fairly easy other than routing it?
In regards to the 200 4r . I used the kit from bowtie overdrives for my swap works good just a pain to get adjusted to where i liked it. but no real issues. you can see in pic. mine was a vortec but same throttle body setup
where did you find the bracket too attach the TV cable on the throttle body? ??
11-20-2017, 04:48 PM
LQ4 6.0L Head/Cam package 
