De-comp Plates

[lambpie]

I've just been having a read of this post:-

http://www.projectpuma.com/viewtopic.php?f=64&t=6583

It's a good read and results in a 230bhp+ puma for not a lot of money.

One thing that did catch my eye was the use of a decompression plate, has anyone on here got experience of something similar on the h22 engine?

I like the idea of a low comp turbo setup

[Donald]

I dunno if this is related but a mate of mine had the wrong thickness gasket fitted when he had something done, and it ran like jobby til it was sorted.

Sounds like a similar thing in theory

[secla]

never heard of anyone use one on a honda. bit of a bodgy way of doing it. you can get thicker headgaskets which would do the same job.

people use low comp for turbo as it gives a bit more flexibility with the tune. a lower comp engine makes less power per psi of boost.

[Donald]

Yeah I didn't write that very well took his STi to main dealer, they fitted the wrong head gasket and it was terrible.

[nelly08]

They make less ponies for the same psi boost... BUT they use lower compression to prevent pre-ignition also meaning you can add more timing therfore more torque.
I'm boosting a stock h22a, and will swap that out for my h22a5 when it looses conpression as the a5 runs a lower compression ratio