does the LS2 really suffer from heat soak?

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Oct 19, 2005 | 02:10 PM

seadoo

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From: Central, FL

does the LS2 really suffer from heat soak?

according to GMHTP, they say that the 05 GTO suffers badly from heat soak. is that true? if so, why? isnt the LS2 a aluminum 6.0, just a bigger cid LS1 with a 90mm intake/TB??

Oct 19, 2005 | 02:36 PM

zamboxl

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From: Sunrise Fl

Quote:

Originally Posted by seadoo

according to GMHTP, they say that the 05 GTO suffers badly from heat soak. is that true? if so, why? isnt the LS2 a aluminum 6.0, just a bigger cid LS1 with a 90mm intake/TB??

no not really, it kinda is but in order to go bigger they had to sacrifice cooling space, the coolant system, is not as capable as the ls1, also there is something about the sleeves not being wet cast or wet pressed or something like that, and there being less space for cooling in between the cylinders, iam not sure how that works but its something like that on top of the ls2 cooling system being less capable.

Oct 19, 2005 | 02:41 PM

seadoo

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From: Central, FL

thanks for telling me that... I was going to swap a H/C LS1 for a LS2 block, but dont think I will now!
thanks for the input

Oct 19, 2005 | 02:44 PM

zamboxl

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From: Sunrise Fl

Quote:

Originally Posted by seadoo

thanks for telling me that... I was going to swap a H/C LS1 for a LS2 block, but dont think I will now!
thanks for the input

well the main problem with it i read somewhere a while ago was that the watter pump had somewhere around 30% less flow capasity than the ls1 watter pump. Now that doesnt mean that u shouldnt switch out, u'll make more power in the end. off curse the ls1 is tried and proven to handle abuse so its up to u, do some more research i been in the bullshit forum for way to long and dont remember my tech as much as i used so wait for a few more replies before u make ur dessision.

edit here is a thought:: if u where going to drop an ls2 in ur car why dont u just custom built an engine, it might end up being a little more maibe 1k more but u'll have something solid, that u can really build on. last time i checked the sponsors here had deals for like 2.9k for a short block and iam not talking about the nameless one that where selling short blocks for 2.5k, that ended up beign a scam iam talkign about the good legit sponsors.

Last edited by zamboxl; Oct 19, 2005 at 02:50 PM.

Oct 19, 2005 | 02:47 PM

98Z28MASS

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I thought the LS2 Gto had heat sink due to the engine covers (Frc's)? I was reading that if the covers are removed the heat soak isnt that bad.

Oct 19, 2005 | 02:54 PM

zamboxl

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From: Sunrise Fl

Quote:

Originally Posted by 98Z28MASS

I thought the LS2 Gto had heat sink due to the engine covers (Frc's)? I was reading that if the covers are removed the heat soak isnt that bad.

well i read this a while back maibe 5 month back i think it was race or lingenfelter that open one of them up and really went to work on it and he posted all the info i talked about up there in much much greater detail iam pretty sure it was in ls7 ls2 internal section.

Oct 19, 2005 | 09:25 PM

HEMIETR

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From: Jenison, MI

The heat soak issue is more related to under hood temps and IAT sensor location. It is built into the MAF sensor, which is very close to the radiator. The computer pulls timing at a very low intake temp (forgot the exact number). A tune and/or IAT relocation can help this condition significantly if not eliminate it.