LS1 to LS3
08-28-2012, 09:50 PM
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LS1 to LS3 I know this has been beaten to death but I would like to convert a ls1 to ls3. I made this decision just because I want a LS3 lol. What exactly would I need? and how much do you think estimate would it cost? How much horsepower would I get if I add long tube headers, a 102mm TB, 102 fast intake, full exhaust system, and a conservative tune? Here is the link for engine http://www.crateenginedepot.com/LS3-...10590C556.aspx
Just want to know what else would I need to buy to switch it out. I plan on getting a high mileage SS. Would I need to switch the tranny?(auto) rear end? Thanks guys
Just want to know what else would I need to buy to switch it out. I plan on getting a high mileage SS. Would I need to switch the tranny?(auto) rear end? Thanks guys
08-29-2012, 09:53 PM
#2
Thse engines will make 500 flywheel with nothing more than headers a good tune.
A cam swap can easily add 50-80 hp.
Getting the heads CNC ported + a cam genearlly results in a 600+hp engine.
Not sure of the intake gains as the stock one works pretty well.
As you can see power is easy to make with these engines.
A cam swap can easily add 50-80 hp.
Getting the heads CNC ported + a cam genearlly results in a 600+hp engine.
Not sure of the intake gains as the stock one works pretty well.
As you can see power is easy to make with these engines.
08-30-2012, 08:13 PM
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Couple thoughts. First, for not a lot more money you can get a 408 iron block with ported heads from TSP or other supplier. That will get you 500 or more rwhp and you can get it set up to be compatable with your LS1 car and not have to worry about conversion parts.
Second, if this is a street car you might be better off getting a lower mile car and starting with bolt-ons that can be moved to a 408 short block later. With a good selection of parts they can work on both 346 or 408. This would be easier to learn on and typically a lower mileage car will have everything else that still works - A/C, transmission not shot, rear end, suspension etc. Unless you are building a race car where everything is going anyway, high mile car can be a pain in the ***. Low mile car could support a Procharger as well - a lot easier install than a new engine.
The LS3 is a great factory engine but by the time you swap the cam/springs/pushrods and port the heads, you are very close to an iron 408 that makes more power and torque.
Second, if this is a street car you might be better off getting a lower mile car and starting with bolt-ons that can be moved to a 408 short block later. With a good selection of parts they can work on both 346 or 408. This would be easier to learn on and typically a lower mileage car will have everything else that still works - A/C, transmission not shot, rear end, suspension etc. Unless you are building a race car where everything is going anyway, high mile car can be a pain in the ***. Low mile car could support a Procharger as well - a lot easier install than a new engine.
The LS3 is a great factory engine but by the time you swap the cam/springs/pushrods and port the heads, you are very close to an iron 408 that makes more power and torque.
08-30-2012, 09:09 PM
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Ok so I would be better getting a 408? I just want something to swap in, and be reliable. I can change the transmission for a beefier one as well. 15k would be budget for car and parts swap.
Yes this will be a street car, and I don't want it to be ridiculously undriveable/loud.
Yes this will be a street car, and I don't want it to be ridiculously undriveable/loud.
08-30-2012, 09:51 PM
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08-31-2012, 11:32 AM
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Basically, I want a DD car that has some b*lls when I need it and is reliable and a smooth ride. I guess I can sacrifice HP for this. I'll be happy with 400 rwhp honestly.
