LS4 Throttle Body
11-22-2009, 10:23 AM
#2
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Yes and no. The bolt pattern will line up and the harness will work, but you'll have to bore out the opening to clear the LS4's butterfly. Why do you want to do this? The LSJ TB is already larger in diameter than the LE5's IM opening, all that this will do is introduce a really annoying whistle as the air goes supersonic through the throat of the IM.
11-22-2009, 11:35 AM
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what about the LSJ TB
cause on the 2.2 there is not a base running air flow table. experimenting with bigger TBs for smoother start up
cause on the 2.2 there is not a base running air flow table. experimenting with bigger TBs for smoother start up
Last edited by copson20; 11-22-2009 at 11:35 AM. Reason: Automerged Doublepost
11-22-2009, 11:36 AM
#5
http://www.ecotecforum.com/forums/sh...ad.php?t=11110
The last post has a link that might assist you in figuring this out. You may benifit from a larger than stock TB. The last link contains information on selecting a new tb. What is your red line?
The last post has a link that might assist you in figuring this out. You may benifit from a larger than stock TB. The last link contains information on selecting a new tb. What is your red line?
Last edited by Mr.N00bLaR; 11-22-2009 at 01:55 PM.
11-22-2009, 01:14 PM
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LSJ TB is a larger diameter than the LE5 manifold's inlet by about 1 mm (almost perfect match, so it'd be the better option compared to the LS4. I don't know that you'd see any gains from using the LS4 compared with the LSJ, but I don't know of anyone that's done a comparison on a 2.2 or 2.4.
11-22-2009, 01:41 PM
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The op's cams might benefit from the bigger TB, and it might not. Also a little porting of the heads would help out the flow. Just make sure you get even flow of air entering and leaving the engine.
11-22-2009, 02:18 PM
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11-23-2009, 10:37 AM
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right now I am at the max for gain. Unless i use bottle or FI. But the Bigger diameter will give me better start up instead of surging. Only consern i have is will i loose power with the LSJ
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