ls2 heads in ls1?
03-29-2010, 03:59 AM
#1
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ls2 heads in ls1? well Iam working on a limited budget!!!! I found a set of ls2 heads for 350 fully assembled.
what you think? need a ls2 intake too? Beneficial? or lost cause?
what you think? need a ls2 intake too? Beneficial? or lost cause?
03-29-2010, 12:30 PM
#4
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yup 243 or 799 heads are a direct fit. also it depends on how much work you want to do to switch over the intakes. you have to convert a few things to be able to run an ls2 intake and its usually viewed as too much of a PITA to be worth any gains that intake MIGHT bring you. i'de say its worth a search.
03-29-2010, 02:12 PM
#7
The biggest difference between the LS2 heads(799) and the LS6 heads (243) is the valves. The LS2 heads have solid valves where the LS6 had hollow/sodium filled valves.
If you have an LS1 that is 02 - 04 you will have the LS6 manifold, if its 97 - 01 you will have the LS1 intake unless you have the 01 ZO6 and then you will have then LS6 intake manifold.
What the LS6 valves give you is lighter valve train and stability in the higher RPM range (6500 - 7K rpm) Since a lot of people know how good the 243/799 casting heads flow for 350 is a steel and jump on it. I would personally have them checked just to be safe. Do not pass them up they are a great buy, and you can upgrade your manifold later on.
If you have an LS1 that is 02 - 04 you will have the LS6 manifold, if its 97 - 01 you will have the LS1 intake unless you have the 01 ZO6 and then you will have then LS6 intake manifold.
What the LS6 valves give you is lighter valve train and stability in the higher RPM range (6500 - 7K rpm) Since a lot of people know how good the 243/799 casting heads flow for 350 is a steel and jump on it. I would personally have them checked just to be safe. Do not pass them up they are a great buy, and you can upgrade your manifold later on.
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03-29-2010, 02:15 PM
#8
The biggest difference between the LS2 heads(799) and the LS6 heads (243) is the valves. The LS2 heads have solid valves where the LS6 had hollow/sodium filled valves.
If you have an LS1 that is 02 - 04 you will have the LS6 manifold, if its 97 - 01 you will have the LS1 intake unless you have the 01 ZO6 and then you will have then LS6 intake manifold.
What the LS6 valves give you is lighter valve train and stability in the higher RPM range (6500 - 7K rpm) Since a lot of people know how good the 243/799 casting heads flow for 350 is a steel and jump on it. I would personally have them checked just to be safe. Do not pass them up they are a great buy, and you can upgrade your manifold later on.
If you have an LS1 that is 02 - 04 you will have the LS6 manifold, if its 97 - 01 you will have the LS1 intake unless you have the 01 ZO6 and then you will have then LS6 intake manifold.
What the LS6 valves give you is lighter valve train and stability in the higher RPM range (6500 - 7K rpm) Since a lot of people know how good the 243/799 casting heads flow for 350 is a steel and jump on it. I would personally have them checked just to be safe. Do not pass them up they are a great buy, and you can upgrade your manifold later on.
03-29-2010, 02:18 PM
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well the reason I ask is cause my local LS guy says unlike the LS1 heads they are square vs being coffin style and that I would need to go with the ls2 intake as well. from what I have read so far that sounds like it is a reference to the ports. is this correct?
03-29-2010, 02:22 PM
#10
well the reason I ask is cause my local LS guy says unlike the LS1 heads they are square vs being coffin style and that I would need to go with the ls2 intake as well. from what I have read so far that sounds like it is a reference to the ports. is this correct?
Dam am always thinking the turn over was in 02 oh well. 
03-29-2010, 05:41 PM
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Ls2 heads are the same as ls6 heads. The only difference is the ls6 had hollow intake and sodium filled exhaust valves while the ls2 heads had solid valves. As far as the difference from late model 799 castings is concerned. From what I understand is they were manufactured at a different facility using the same exact mold, so in theory they are the same as 243 heads. They'll all work just fine. Don't waste your time with an ls2 intake, while it will accept a better throttle body. I have yet to see an ls2 intake make more power in any comparisons.
If you're putting these on your 98, they'll be a little more work required. You'll need new valve covers, coil brackets(if I remember correctly you run the same coils you just have to flip one over no big deal), the hardware, and a couple other minor modifications.
If you're putting these on your 98, they'll be a little more work required. You'll need new valve covers, coil brackets(if I remember correctly you run the same coils you just have to flip one over no big deal), the hardware, and a couple other minor modifications.
03-29-2010, 07:22 PM
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LS2 intake requires gaskets, 4 bolt throttle body($200.00-$325.00 or more) wiring harness adapter(75-$95.00),plus the price of the intake. The LS2 will not make much power on a stock 346. 408CI or more maybe a ported LS2 is the budget way to go, but for a stock bottom end you can't beat the LS6 for the price.