whats the lowest rpm you want to set vtec to engage without hurting your engine and lowering its life or its drivability?

 

why would u want it really low? what motor do u have and it wont hurt anything exept ur gas milage im thinkin

 

Do not mess with it's X over unless you have work into it, like real work cams etc.

If you really want to know what the lowest is, spend some dyno time with it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ***$nyper &raquo;</TD></TR><TR><TD CLASS="quote">Do not mess with it's X over unless you have work into it, like real work cams etc.

If you really want to know what the lowest is, spend some dyno time with it.</TD></TR></TABLE>

I'm with him, a dyno is the only way to konw. Ideally you would want it set where you can't really notice it kick in. If you set it too high you can typically feel it b/c there will be a spike in power. If you set it low it could tend to bog just into vtec.

If you have stock cams use the Honda setting + or - a few hundred, just my .02

 

its just a b16a i was thinking about setting it to like 4500 insted of 5000. wouold that be ok? i would only run it there for fun i wouldn't keep it set that low i wouldn't want to hurt it.

 

what type of controller do you have, unless you have a controller where you can change the fuel and ignition tables to match the change. stock cams stock motor not worth it, you can change it and probably not like the change.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hondacrx2 &raquo;</TD></TR><TR><TD CLASS="quote">its just a b16a i was thinking about setting it to like 4500 insted of 5000. wouold that be ok? i would only run it there for fun i wouldn't keep it set that low i wouldn't want to hurt it.</TD></TR></TABLE> Then why, just really why?

You have been told it's not a good idea, it's a stock motor what good could come of swapping the cross over?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hondacrx2 &raquo;</TD></TR><TR><TD CLASS="quote">its just a b16a i was thinking about setting it to like 4500 insted of 5000. wouold that be ok? i would only run it there for fun i wouldn't keep it set that low i wouldn't want to hurt it.</TD></TR></TABLE>

I'm just going to say NO. Honda set the factory x-over where it's at for a reason. That reason being the smoothest power curve whereas vtec x-over picks up where torque drops off.

I have a mildly built GSR and switching to a different exhaust and header messed up my tune. Among other things, VTEC now needs to be set differently because it hits, I lose tons of power and it picks back up again.

My point is, if you mess with a stock motor's x-over point you're messing with your power curve and could end up with a dip in power where you need it most.

VTEC controllers on stock cam'd b-series are just ****

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hondacrx2 &raquo;</TD></TR><TR><TD CLASS="quote">whats the lowest rpm you want to set vtec to engage without hurting your engine and lowering its life or its drivability?</TD></TR></TABLE>

I think you need at least 2000 -2500 rpm or you wont have enough oil pressure for vtec to engage