Thread: 327 Ready to fire

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Originally Posted by camaro_fever68

GM Hot Cam. They want it on a 1.6. What do they know???

Ray, it seems to me that Glenn is talking specifically about the Generation 1 SBC, and I believe that your "Hot Cam" reference applies to the Generation III/IV LS platform. In this thread the OP is asking about a 327, smack in the middle of the Generation 1 family, so engineering design features on the LT, LS, and LT/EcoTech likely don't apply, and can lead to confusion, IMO. I'm not trying to be argumentative here, just pointing out what seems to me to be a questionable reference.

GM reuses its code numbers so this is confusing. I think the LT-1 and LT-4 referenced here is not the LS platform but the Gen 2 SBC used in Camaros and Corvettes after 1986. It's the f.i. engine that uses the reverse cooling system. Now Chevy has an LS engine designated LT-4. That aside, the guys on the Engine Tech Forum on Speed Talk: Interviews - Racing Books - Racing Forum discuss using 1.6 ratio rockers all the time, but they are building racing engines for the most part, and those rockers are commonly used. But for a daily driver or a car that sees a lot of highway miles, I would not want the added stress of 1.6 rockers in my Gen I sbc engine. But then, I run a gear drive, and some people have all sorts of problems with those as well.

Originally Posted by rumrumm

GM reuses its code numbers so this is confusing. I think the LT-1 and LT-4 referenced here is not the LS platform but the Gen 2 SBC used in Camaros and Corvettes after 1986. It's the f.i. engine that uses the reverse cooling system. Now Chevy has an LS engine designated LT-4. That aside, the guys on the Engine Tech Forum on Speed Talk: Interviews - Racing Books - Racing Forum discuss using 1.6 ratio rockers all the time, but they are building racing engines for the most part, and those rockers are commonly used. But for a daily driver or a car that sees a lot of highway miles, I would not want the added stress of 1.6 rockers in my Gen I sbc engine. But then, I run a gear drive, and some people have all sorts of problems with those as well.

1.6 rockers actually add performance without stress But I would never expect a guy that runs a gear drive to understand this, lol. I like the whine, not in my engines though.....

Originally Posted by rspears

Ray, it seems to me that Glenn is talking specifically about the Generation 1 SBC, and I believe that your "Hot Cam" reference applies to the Generation III/IV LS platform. In this thread the OP is asking about a 327, smack in the middle of the Generation 1 family, so engineering design features on the LT, LS, and LT/EcoTech likely don't apply, and can lead to confusion, IMO. I'm not trying to be argumentative here, just pointing out what seems to me to be a questionable reference.

My Hot Cam reference is is towards a Gen II platform which is nothing different than a Gen I except roller lifters. Gen III is totally different and not in this discussion.

LT is nothing special except the cooling, LS is a different engine. EcoTech is not in the discussion. Hope this helps.