LS3 Heads and Intake on LS2 Shortblock?
Thread Starter
Teching In
Joined: Mar 2006
Posts: 5
Likes: 0
LS3 Heads and Intake on LS2 Shortblock? Hey,
I was wondering it is a simple bolt-on to run LS3 heads, intake, and injectors on an LS2 shortblock? Does anybody no about doing this?
Also, could I run an LS3 cam in an LS2 shortblock set-up with the LS3 heads and intake?
If shortblock is a 2004 with different reluctor than on an LS3 cam, am I better-off running an LS6 cam in this situation?
If any of the above works as a direct bolt-on, what would be a safe rev-limit to run if racing- i.e. is the limiting factor on a stock LS2 the valve gear alone, or is there a weak-link in the bottom end?
Thanks
I was wondering it is a simple bolt-on to run LS3 heads, intake, and injectors on an LS2 shortblock? Does anybody no about doing this?
Also, could I run an LS3 cam in an LS2 shortblock set-up with the LS3 heads and intake?
If shortblock is a 2004 with different reluctor than on an LS3 cam, am I better-off running an LS6 cam in this situation?
If any of the above works as a direct bolt-on, what would be a safe rev-limit to run if racing- i.e. is the limiting factor on a stock LS2 the valve gear alone, or is there a weak-link in the bottom end?
Thanks
Teching In
Joined: Sep 2010
Posts: 46
Likes: 0
From: Ft.Lauderdale, FL
IF you want to keep stock CR, the heads will need to be milled. How much? Search. With a stock LS2 cam, be it a C6, GTO, or even a TBSS, PTV clearence should not be an issue. I don't remember which head gasket to use, if you decide to have the heads milled. MAP sensors are different between the LS2 and LS3, but that should be included when you get the manifold. Is it a "simple bolt-on"? No.
Thread Starter
Teching In
Joined: Mar 2006
Posts: 5
Likes: 0
IF you want to keep stock CR, the heads will need to be milled. How much? Search. With a stock LS2 cam, be it a C6, GTO, or even a TBSS, PTV clearence should not be an issue. I don't remember which head gasket to use, if you decide to have the heads milled. MAP sensors are different between the LS2 and LS3, but that should be included when you get the manifold. Is it a "simple bolt-on"? No.
Thanks very much!
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Teching In
Joined: Sep 2010
Posts: 46
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From: Ft.Lauderdale, FL
Cam choice is very important in this though. This setup does not need a huge donkey dick cam to make ideal power. IIRC, these heads/intake like a low duration standard split cam. Low duration meaning under the 230* range. And also PTV clearence will eventually become an issue when you get into the longer durations and high lifts.
Good luck!
Good luck!
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I It works great.
Yes, but why, get a better cam.
I think you are confused. Reluctor is on crank. If you mean cam gear you already have ls2 cam gear and front mount cam sensor. I believe ls6 cam would be better than ls3 cam.
Bottom end will be fine and you need good valve springs with the ls3 valves if you want to go to 7k reliably.
was wondering it is a simple bolt-on to run LS3 heads, intake, and injectors on an LS2 shortblock? Does anybody no about doing this?
Also, could I run an LS3 cam in an LS2 shortblock set-up with the LS3 heads and intake?
If shortblock is a 2004 with different reluctor than on an LS3 cam, am I better-off running an LS6 cam in this situation?
If any of the above works as a direct bolt-on, what would be a safe rev-limit to run if racing- i.e. is the limiting factor on a stock LS2 the valve gear alone, or is there a weak-link in the bottom end?
Teching In
Joined: Apr 2017
Posts: 14
Likes: 0
I It works great.
Yes, but why, get a better cam.
I think you are confused. Reluctor is on crank. If you mean cam gear you already have ls2 cam gear and front mount cam sensor. I believe ls6 cam would be better than ls3 cam.
Bottom end will be fine and you need good valve springs with the ls3 valves if you want to go to 7k reliably.
Yes, but why, get a better cam.
I think you are confused. Reluctor is on crank. If you mean cam gear you already have ls2 cam gear and front mount cam sensor. I believe ls6 cam would be better than ls3 cam.
Bottom end will be fine and you need good valve springs with the ls3 valves if you want to go to 7k reliably.
On The Tree
Joined: May 2006
Posts: 131
Likes: 1
From: Virginia
I have a 06 GTO M6 with LS3 heads and intake plus injectors. The heads are milled .030" and running .040" head gaskets. Running a 230/238 Cam Motion cam. It pulled 480/434. SAE corrected. NOT AN IRON BLOCK.
Teching In
Joined: Apr 2017
Posts: 14
Likes: 0
thank you...that's what I'm looking for...going to build one for a swap in my 5 series BMW as the current motor will be on its last leg by then
