I read that this guy had a b16 or Si engine and removed the vtech and removed the vtech lobe on his cam to produce higher revs. If i put a 98 and up si head on my 93 LS block then removed the vtech and lobe would i benifit more from the higher revs, and the already higher displacement of the si head? Or would i be better of leaving the vtech and getting a vtech controller?
I have never heard of such a thing…Im not sure but i think the person you got this information from may be wrong…I have never heard that before…
leeo
I believe i’ve heard of something similar to that. A person replaced the vtec cams with a higher lift cam with that one lobe profile only, and of course, disabled the vtec.
Perhaps the mentality behind this is to free up the reciprocating weight of that extra low lift lobe and just utilize the natural benefits of the higher flowing vtec head etc. I don’t know anything about the feasability of grinding off the low lift lobe on the stock vtec cam tho.
Regardless, DO NOT DO THIS in any way shape or form mister! Unless you are building some kind of race car only application and know your stuff. Your low end power would be poo and you’re high end power would be almost completely exactly the same (with the original vtec cam high lift only lobe scenario, that is).
We don’t usually refer to heads with the term “displacement” ( that’s “block” stuff). The vtec head will have a smaller combustion chamber displacement (volume we say) than the ls’s, if that’s what you mean.
d
1st of all it’s VTEC not vtech.
2nd. Are you talking about the Toda vtec killer cams?
If so, click here and here.
don’t do it bro,
Its a dumb idea for a daily driven street application. If you want to idle at 3500 rpm then go ahead. But don’t. If you want some power just put some crower 404’s on ur head. You don’t have emissions problems either in detriot neither, well I don’t think.
Its too much money to invest in you engine IMO to make it work for the street. Just do some other type of swap.
I believe the reson behind this, in addition to lower recipricating weight, is to utilize the dofferent valve system of a VTEC engine. VTEC engines have a different internals that are much more rev-happy (high RPM stable) then non-VTEC heads.*
*Warning: for race applications only. Check local laws for blah, blah, blah!
i read an article about this.the signal auto chop top civic has that,but i guess it would only be beneficial for the all out race car:D
I was thinking about this too. If I had the Ferrea roller rockers and cams or the system from Crane or Web?, I could eliminate the Vtec and not have to change ECU’s.
Remember with this setup you are still limited with the LS block, so rpm’s would still be based on the LS’s limits. And damn it’s expensive for those kits!!
I would not grind off the Vtec lobes and disable it that way. Even if you did, the small lobes aren’t shaped to make high end power anyway, right?
I’m no expert on this stuff, so if I’m wrong, forget about it.