I'm getting a b16a1 put in right now as i speak and i was wondering when the Vtec kicks in? I'm assuming it's a SiR CPU. And i've heard they have a rev limiter at about 120 is that true??? and if so what can i do about it??? and which is a better Vtec X-over 4400 or 4900??? thanx for answering "all" my questions???

 

the ecu cut off is 112 I believe. To remove it you will need to get your ecu programed. There are a few reputable people here on HT that can program it for you. As far as the crossover goes both of those seem low for a stock engine I would say closer to 5500 rpms. Someone correct me if im wrong.

hope this helps
Later
Matt

 

If you're interested in getting your ECU chipped, contact me.

 

Why go faster than 112?

 

I am pretty sure vtec cross over is 5100 but I cant remember for sure it might be 5500

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MooreVTEC &raquo;</TD></TR><TR><TD CLASS="quote">Why go faster than 112?</TD></TR></TABLE>

the 112 limit is a good thing, i bet if i didnt have it i would be dead.

 

Mmmm, gotta love 'I think it's'... heheh

I have a PR3 ECU (M/T). VTEC x-over is dyno-verified to be at 4800 rpm. The speed limiter kicks in at 118mph.

Sometime soon I'll get my brother's PW0 ECU (M/T) to the dyno and we'll find out where its VTEC x-over is and that will end this whole debate and debacle of misinformation.

 

I have 1990 b16a1 w/ PW0 computer and my vtec x-over according to my 5" tach which is wired straight to the distributor is 4600rpm. limiter is around 112 where it should be.