how much performance decline?

[AcuranVA]

I was wondering what performance decrease I could expect from a 94 integra ls bottom end with a B18C5 head when compared to the whole B18C5 engine?:smoker2:

[ViGGa2LO]

the only decline would prob be the heads giving off to much air which inturn is going to mean that your can is going to run lean and you will end up firing a head after awhile. and with a stock intake manifold, the heads wont be getting enough air to begin with let alone with the bigger heads that are all ready there... tell me if i am making any sense?

[Moppie]

Originally posted by ViGGa2LO
the only decline would prob be the heads giving off to much air which inturn is going to mean that your can is going to run lean and you will end up firing a head after awhile. and with a stock intake manifold, the heads wont be getting enough air to begin with let alone with the bigger heads that are all ready there... tell me if i am making any sense?

Your making absolutly no sense!


A B18c head on an LS block has two problems:
The CR can end up being pumped up to high, which can cause detonation on low octane fuel. (instant death for an engine)
And you have to get the block modfiedy to run an oil line to the VTEC solonoid.

Then there are other problems with durablity assciated with the weaker rod and piston design of the LS block, and the lack of oil squirters.
If you know what your doing and are completly rebuilding the engine from the ground up then these are things that can be over come.
But if you just want to slap a DOHC VTEC head on a non VTEC block then it will never be as relaible or run as well as a genuine B18c.