Water Leak

[dsp26]

how is it overcamming its a stock bottome end but thats about it... shaved head for higher compression...

term "overcamming" depicts a scenario where the combination of cam duration and overlap is too big for an engine and WILL lose power over a significant range versus a marginal gain maybe up top, in the case of Toda Cs having power up high and on a 10:4:1 static CR motor, for all you know the dynamic CR is probably 7 or 8:1.

its because when the duration is too big, the inlet valves are open at the same time as the exhaust (overlap) on the intake and combustion stroke, therefore instead of the combustion chamber being able to compress a sufficient amount of air/fuel mixture, it's actually already coming out your exhaust un-ignited (loss of cylinder pressure). thats why higher duration moves the power band to the top end its because everything is opening and closing faster.. but i bet your engine is idle-ing real rough right now too...

Theres a reason Toda Cs are marketed as a full build race cam only.. i have no idea who suggested for you to get them on a stock block/head as bigger is not better when it comes to NA modifications.


***EDIT***
have a look at this thread, Adrian actually posted the powerband of a customers car along with setup for Toda Cs in Post#16
http://www.ozhonda.com/forum/showthread.php?t=91415

personally if i had the money for a full build i'd probably do Toda Cs too and make the most of the top end.. kinda no point scavenging for bottom end on a motor with a bore vs stroke ratio not designed for it. but because i'm on a budget and i am opening the engine up anyway, the performance cams of choice are a 'may as well' thing