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I'm looking what CR should be for 400 - 450bhp. Standard 4x4 pistons .25 or bore valve cut outs. Bd10 exhaust and bd14 inlet
I am not sure if there is an exact science to work it out but 7.4 to 7.8 seems to be what most big power engines have. Are you building the engine yourself or having it done by a Cosworth specialist?
I am not sure if there is an exact science to work it out but 7.4 to 7.8 seems to be what most big power engines have. Are you building the engine yourself or having it done by a Cosworth specialist?
i think that is well to low ,at least standard now seems to be the way forward
i think that is well to low ,at least standard now seems to be the way forward
Maybe things have changed but most big power Cosworth YB turbo engines have low comp. High comp used to be more for N/a engines. What reason is there for having the higher comp ratio?
Maybe things have changed but most big power Cosworth YB turbo engines have low comp. High comp used to be more for N/a engines. What reason is there for having the higher comp ratio?
i think low comp was a long time ago,high comp less lag better off boost driving etc just a nicer car all round as james says mark shead has been running higher comp for a while and from what people say his engines seem to be the best now
I am not sure if there is an exact science to work it out but 7.4 to 7.8 seems to be what most big power engines have. Are you building the engine yourself or having it done by a Cosworth specialist?
Maybe 10 years ago but mines at 8.6 : 1 & is the modern way.
01-03-2016, 09:24 PM
