Hi, i have a hondata ecu and I was playin with my vtec engagement point today. What is everyones opinion about best engagement point. Just looking for opinion. thanks. i think I like 4400, but im not sure.

 

The best vtec engagement point should be chosen with the aid of a dyno, and then your fueling should be modified for it with the aid of a wideband.

4400, IMHO, is too low for NA. You are probably losing midrange power.

 

y do i need a dyno to simply mess with the vtec? The hondata automatically adjusts airfuel ratio for what you set it at.

 

I have 4200 on an otherwise stock motor. Works great. Though I've never seen anyone else with it that low *shrug* I guess I have a factory freak lol

 

why so low?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hatch4raceb16 &raquo;</TD></TR><TR><TD CLASS="quote">y do i need a dyno to simply mess with the vtec? The hondata automatically adjusts airfuel ratio for what you set it at.</TD></TR></TABLE>
Are you running your hondata unit in conjunction with a wideband input?

 

According to the dyno thats how low I had to go to get rid of the dip in power.

http://www.we-todd-did-racing....D.jpg

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by piotrush &raquo;</TD></TR><TR><TD CLASS="quote">According to the dyno thats how low I had to go to get rid of the dip in power.

http://www.we-todd-did-racing....D.jpg </TD></TR></TABLE>

is run number three the one with the VTEC set at 4200 RPMs? seems like you start to run really rich after 7000 RPMs.

 

yes. I know its rich but this was done within 3 pulls and at the time the car was bone stock so we thought it would be a waste to tune the car more since I was expecting my exhaust within the next few days. I'll probably get an hour ot dyno time once I get my cat installed and header modded.

 

JDM Prelude VTEC Kicks in at 5000 stock on BB1 series VTEC

 

I actually set my V-tec to 5900. I think it works best under heavy acceleration.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Timmy Joe &raquo;</TD></TR><TR><TD CLASS="quote">I actually set my V-tec to 5900. I think it works best under heavy acceleration.</TD></TR></TABLE>

That is way too high. You will never keep it in the power band if its set that high. You will be in and out of vtec during shifts. I liked mine at 48 but its stock right now since my motor has about had it. SEE SIG

 

i heard that will give you a big vtec surge.