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Originally Posted by xizor
(Post 1569840488)
to clarify, you mean you can't fit the ls3 water pump on a non-corvette LS1 because the accessories are different between the LS1 variations?
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Originally Posted by xizor
(Post 1569933133)
bump, want to verify before i decide to pull the trigger on a ls3 pump
The corvette has the accessory belt closer to the motor than does the f-body (it's accessories are arranged differently as well). As a result the LS3 style pump works just fine on the vette. However it won't on a f-body because the accessory belt is too far away from the engine. I'm not sure if how the belt is on the other LS1 setups. I've only worked with vettes and f-bodies. Honestly though, it's not that big a deal. You save a few ounces of reciprocating mass. Otherwise the pumps are the same. If it's only a few bucks more it may be nice just to have a cleaner engine compartment with the smaller pulley on the LS3 pump. Otherwise I wouldn't bother. |
NOTE: 2004 LS1/6 C5's use the newer LS2 style tstat.
I do NOT know if it fits the LS3 WP, just a NOTE CAN WE CALL THE LS2,3,7 WP'S ALL THE SAME BY VERIFYING PN? SMART SOURCE FOR GM INFO: Gene Culley, the guy is on point w/ GM parts www.gmpartshouse.com |
page 62 in june 2009 super chevy magazine talks about how interchangable the waterpump is between the LS series motors
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Originally Posted by KCvetteowner
(Post 1568968944)
I had an LS6 with LS1/LS6 water pump on it. I upgraded to a 418ci forged LS3. LME built the motor and said all the LS1/LS6 front accessories will bolt right up. I already had 43k miles on the car and wasn't about to put my old water pump on a 510rwhp motor. So I looked around at options and this is the best option short of spending a lot of money for an Evans unit, etc.
I compared the two pumps side by side, weighed them and saw the gaskets are identical they both line up identical and the tensioner mounts the same exact way. Your stock belt fits perfectly. Here is a link to more information on the LS1/2/3/6 differences: http://nookandtranny.com/Info_LSx.html |
That's a good point the newer style LS2/LS3 pump uses a better tstat throat. It allows you to buy a cheaper tstat that is not a part of the tstat housing.
However, this is the same on newer LS1 pumps as well (They switched over in 2004 or somewhere there about) So the LS1 vrs LS2/LS3 pumps are identical at that point with the execption of the pulley. And even if you get an older style pump and want the new separate housing all you have to do is purchase the newer tstat housing and regular tstat. They are interchangable. |
I think this thread has convinced me that getting the ls3 pump is not much of an advantage over the ls1, especially considering replacement ls1 pumps are easier to find for cheaper
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Evans... :thumbs:
Increased volume Better flow.. |
I can speak from first hand experience. They look the exact same. With exeption of pulley and dending on the year of LS1 pump the tstat housing. Maybe inside the casting is a bit better allowing it to flow a little more and have slightly increased volue.
Honestly though, I wouldn't bother getting an LS3 pump. If you're really wanting to upgrade the flow and get an edelbrock or other aftermarket high flow pump. That's my 2 cents. |
depends?????????
UPGRADE or REPLACEMENT to justify the ls3 wp a LOT of C5's are puking WP's from being garage queens or just old age 10 plus years now. |
Originally Posted by xizor
(Post 1569955506)
I think this thread has convinced me that getting the ls3 pump is not much of an advantage over the ls1, especially considering replacement ls1 pumps are easier to find for cheaper
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mine is leaking as well picked up new pump from full throttle in atlanta for 142.00
and just found this one on ebay for 93.00 plus 12.00 shipping. |
I have an ls3 WP... i need 7rwhp to get to my goal.. will this help? if it gives me 1rwhp... its gold!
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