Ive been searching on the web for a while and cannot seem to find any information on the differences between the heads on these engines.
All I can find are compression ratios, bore, etc etc but nothing on head comparison.
Beside the differences on the valve train, cams etc. I want to know if the heads are the same or is the type R jdm K20a more superior? If so, then Valves should be different as well?
It really depends what year you are talking about... generally before 2006 and includind the american Civic Si 2006+ heads they flow the same. The 2006+ TSX flows better. The japanese type r heads from the latest years flow better but still conservative for full blown applications
anyone know how i can find a side by side comparison to k20a2 and jdm k20a cams? i've seen it somewhere but haven't been able to find it yet. what's the part number of jdm cams?
I flowed tested at the same day a 04 TSX head, a 06 TSX head and a 04 K20A2 head.
At lower lifts the 04-06 TSX head show better flow rates, 4-6cfm higher than the K20a2
at .500" lift the 06 & 04 K20A2 had the same value give or take 1-2cfm,
at .550" lift the 04 K20A2 flowed 4-5cfm more
^ yes i have a 06 Z1 head and a 06 tsx head. I want to drop one of them on my shortblock tonight or tomorrow. i dont want to port anything anytime soon thats why im looking for the best head to use stock.
The TSX head flows less than a Z3 head does at higher lifts. Depending on the purpose of the engine build, and what IM and exhaust are used, I would rather take a Z3 head, add bigger intake valves and run that. But if you can get the TSX head for cheap it is still a very adequate head design.
So is this true the stock z3 head flows better than other a2/z1 heads? someone confirm?
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