sixt9er

iTrader: (2)

Which Gen IV blocks use the piston squirters? Are there any particular years that have them? Thanks.

Beau@SDPC

iTrader: (14)

LS9 and LSA engines. Basically the 2 forced induction LS engines.

sixt9er

iTrader: (2)

Ok...Someone explained to me that the L92/LS3 had them also. I didn't know if it was true or not. Thanks for the info, John.

Beau@SDPC

iTrader: (14)

If it makes any difference, the 3500 V6 was the first to have it I believe then the 2.2 turbo ecotec, along with the 3900/3500VVT V6 engines, then the LS engines got them.

Oh4GTO

iTrader: (46)

You can make them work with any Gen IV block. Shop needs to know what they are doing though.

Beau@SDPC

iTrader: (14)

I would only trust a few places with that. Prob one of the most well versed in it is Katech.

sixt9er

iTrader: (2)

Another question is, is it really worth the expense to have a LS block fitted with the piston squirters for a 500hp, everyday application?

Beau@SDPC

iTrader: (14)

There is no need to spend the extra money to make the 500 HP engine have the squirters. People drive around on engines that make more than that every day reliably with no problems.

Oh4GTO

iTrader: (46)

I thin its one of those "it depends" questions. If you have the money to do it, it cant hurt. Your engine will run cooler and take some of the slack off the cooling system. Expecially if its road raced.

Also depends on the car. I jsut got into a built C5 from a GTO and these cars normally run 40-50 degrees hottor because of the way they injest air. I would love to have piston squirters on the vette because the stock cooling system cant keep up with the 95 degree weather here. I can barely get on it without it starting to get really hot. Everything in the cooling system is nice and clean.

rsz288

Ditto that. Strip engine of no real benefit. FI circuit engine maybe. GM didnt put squirters (piston crown cooling) in the LSA and LS9 just so they could say they had them. They were largely needed to enable long term durability (100,000 mile warranty) objectives for pistons/rings/little end that may see some circuit or extended high speed highway running. And maybe even short term crown area temperature control within the design objectives. It also means they can run tighter piston to bore and keep the noise level down. Plus these days with low friction thinner rings less heat runs out through the rings to the cylinder wall.