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Originally Posted by ahzab33
High revving engines can lead to shorter engine life and high maintenance (RX-7 anyone?). Not only does bigger displacement mean slower moving parts, ....
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Well ...
Longer stroke = Higher piston velocity at the same RPM
and in this particular motor, the LS/CRV crank fucks up the geometry as the rod:stroke ratio goes out of whack in comparison to the original B-series design ... the b16a, which exibits a near-perfect 1.74 r:s ratio..
what does this mean? more side loading of the piston. more pressure on your already weak thin walls bored out to 84mm. this means your motor will break if you are pushing it too hard with high RPMs and high CRs
All that said.. CRVTEC/LSVTEC 2.0 is one bad ass fucking engine when its BUILT PROPERLY..... you can get 220-240 HP and ~150 torque from like 2.5k - 7k... IF YOU BUILD IT PROPERLY which costs $$$
and you wont need to rev it as high as a fully built b18c or b16a in terms of both red line (the power dies off sooner due to the long stroke) and the rpm's you will hit when cruising (with so much torque u can shift sooner and putt around with a numerically lower geared tranny and not be forced to cruise on the highway at 95 billion RPM)..
so, yes, it can potentially mean slower moving parts.. but its not that simple.. adding stroke and bore stresses a motor out.. more stroke = less rpm potential but also gives u more torque... more bore = more power
.... but also harder to cool and keep the sleeves intact...
as for ECU if you want to be proper you will need to go ZDYNE, TurboEdit, OBD-1 conversion (Hondata, Uber, Crome, etc) etc.. i.e. custom.. like i said, that is If you want it to be tuned PROPERLY...so you can have the proper air fuel ratios / timing curves and have the motor last a long time....
on the other hand you CAN hack something together ... lots of people do it .. i.e. run a stock VTEC ECU with a stock CRV bottom end with a VTEC head on it ... with FPR and/or piggyback computer...you get the idea... slap it together and drive it around for the summer and have a good time..
i dont know how long that will last however
now .. if u properly build a 2.0L VTEC .. and u put a turbo .. well then u ... well.. u will be my hero... and u are probably very rich in the first place... and u will be putting down ridiculous numbers such that you will be very scared to hit WOT
