dont bash, i DID search. this may sound like a dum question. but i want to know actual specs cuz i have seen and heard about 10 different answers to this question. i need to know:

redline rpm on usdm h22a=
redline rpm on JDM h22a=

vtec engagement on usdm h22a=
vtec engagement on JDM h22a=

thanks in advance.

 

all regular h22as have a 7400 redline

4th gen A1 and JDM motors engage VTEC at 4900 rpms, 5th gen A4 and JDM motors engage at 5200

 

im not doubting you but are you 100% sure??? thanks for hte info though

 

man, satan_srv is like the king of preludes, he knows it all

 

i dont usually post in prelude forum, i dont doubt him at all, i just need to know 100%

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PrettyLude &raquo;</TD></TR><TR><TD CLASS="quote">man, satan_srv is like the king of preludes, he knows it all</TD></TR></TABLE>

haha nice,

I was actually thinking about this question the other day, I never knew the h22's spun that high

 

I wish! My USDM H22 Engages VTEC @ 5,700, and from what I hear, that is Stock for 4th Gen Preludes. This was even before I changed ECU.

 

wow i thought my 99 base engage vtec at 5,800

 

you gotta remember the stock tach is off by about 400rpm

 

tachs are off. Get a V-AFC if you want to see it. Plus there is a difference between when VTEC engages and when it actually 'hits' it's a mechanical system.

The answers are in the Helms if you doubt me.

 

thanks for the info satan. appreciate it

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by H22INSD &raquo;</TD></TR><TR><TD CLASS="quote">I wish! My USDM H22 Engages VTEC @ 5,700, and from what I hear, that is Stock for 4th Gen Preludes. This was even before I changed ECU.</TD></TR></TABLE>


Not on any stock Prelude ECU, from where do you hear this from?

 

ok satan then why does my 1993 jdm vtec engines vtec engages at 5400 rpm and not 4900 stock jdm p13 ecu ////// get a vafc and you can tune it to anything you want .... how is you re h23 vtec holding up? take it to 7500 rpm at every shift?

 

I heard stuff about tachs being off too. However, my VTEC engages exactly when the tach hits 5,200 rpm, that is also when VTEC is suppose to kick in on a H22a4. Does this mean my tach isn't off 400 rpm like what I hear about tachs being inaccurate by that much?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by specialedition &raquo;</TD></TR><TR><TD CLASS="quote">ok satan then why does my 1993 jdm vtec engines vtec engages at 5400 rpm and not 4900 stock jdm p13 ecu ////// get a vafc and you can tune it to anything you want .... how is you re h23 vtec holding up? take it to 7500 rpm at every shift?</TD></TR></TABLE>

I don't know, your tach is off. I don't have an h23 VTEC...I have an h22a...

 

if you use the usdm dizzy would the tach still be off?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by specialedition &raquo;</TD></TR><TR><TD CLASS="quote">if you use the usdm dizzy would the tach still be off?</TD></TR></TABLE>

how would a dizzy change the tach...i would have to say no. and yes the tach is off 200-400 rpm depending where your rpm's are at. the higher you rev the more your tach is off

 

w/ my h22 vtec kicked in at 5400, but you need to get a VAFCII or something. Its fun having vtec hit whenever. Mines set for 4800, nice and smooth all the way to the top of the band.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by djbrandonr &raquo;</TD></TR><TR><TD CLASS="quote">w/ my h22 vtec kicked in at 5400, but you need to get a VAFCII or something. Its fun having vtec hit whenever. Mines set for 4800, nice and smooth all the way to the top of the band.</TD></TR></TABLE>

On my H23A, VTEC engages at 4400 RPM's