My jdm b16a2 recently recieved a set of CTR cams, ITR valvetrain, Skunk2 sprockets, and a mild port. VTEC x-over is at stock, (5200 I believe) it bogs till about 5500, then pulls pretty well after that. Would simple tuning cure this? Or is it that I don't have enough mods to support the cams? TIA

 

your mods are fine but cams are not a drop and drive add on you need to tune them! do you have something you can change your cross-over with (vafc,hondata)? but you need to def. visit the dyno

 

thanks for the help, h-t member boostedhybrid is not far from me at all, and he has his own dyno Seeing as though the motor is run OBD0, I dont have many options as far as setting my crossover..

 

Ok your problem when it comes to your bogging at 5200 rpm is no problem to fix. If you say you have vtec set at 5200 rpm I assume you have a vafc or something of that nature to adjust vtec engagement. You have the crossover set to low, the ctr cams don't make any power until 5700 rpm. Just like 2000-01 ITR cams. stock cross over to vtec is 5700-58 rpm. Try it and see how it feels, shouldn't feel like it falls on its face. Also of course tuning on the dyno is always an optimal choice to smooth out power all the way across the whole range. Good luck man

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92RED Hatch &raquo;</TD></TR><TR><TD CLASS="quote">Ok your problem when it comes to your bogging at 5200 rpm is no problem to fix. If you say you have vtec set at 5200 rpm I assume you have a vafc or something of that nature to adjust vtec engagement. You have the crossover set to low, the ctr cams don't make any power until 5700 rpm. Just like 2000-01 ITR cams. stock cross over to vtec is 5700-58 rpm. Try it and see how it feels, shouldn't feel like it falls on its face. Also of course tuning on the dyno is always an optimal choice to smooth out power all the way across the whole range. Good luck man </TD></TR></TABLE>

The ECU is stock, and I don't have a vafc controller. Stock VTEC x-over is at 5700rpm?

 

Well, I know that integra type r cams 00-01 are the same as ctr cams. You can do a search on this and find more info that you'd like on this fact if you please. I have a JDM B16 in my eg hatch and I have a vafc...I had a set of 00 ITR cams put in and my vtec was set for stock engagement on my b16 which was 52-5400 rpm somewhere around there, then I had the same problem you are having. The motor would crossover and there was nothing...even felt like low cam was taking a smoke break..haha..but I remembered instantly that an integra type r's vtec engagement for vtec isn't until 5700 rpm, so I changed it real quick and it felt like it should. Felt great and pulled a bit harder than the stock cams all the way to the top. Then a few weeks later I had my car dynoed for further tuning. I recommend getting a vafc asap or hondata which ever you'd perfer. good luck

 

Thanks Can't I also just have my ECU chipped? I hear wiring those vafc's can be a PITA.

 

Yeah having the ecu chipped would work out ok..you want to find one that had vtec coming in around where stock engagement would be. Yeah wiring up a vafc if you've never done one can be a bitch...but the gain from all that bitch *** wiring would be a tool you can use when you get extra time and money to better fine tune your engine on a dyno.
Yeah chipping your ecu would be a quick fix to your bogging problem, but as you know every motor is different and acts a little different to different mods....and that chip has a program written in it that worked well for one motor/car at one day and time with who knows what mods......... a vafc or hondata would be great so just the right air/fuel mixture at the right rpms is given and vtec engagement is coming in at the right time so there is a smooth crossover with little power drop off and etc etc...

Like I said the chip would be fine for now, but in the future just remember that you'll do more mods to your engine and be wanting more power and to get that you'll need more than just a chip that was written for another application. A better source of engine management will be necessary to keep you and your motor happy...good luck bro

 

try adding more fuel via FPR...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BACKintheDA &raquo;</TD></TR><TR><TD CLASS="quote">
Would simple tuning cure this? </TD></TR></TABLE>

Most likely...Yes.


Go see Jeff...and while you are at it, tell him to call the Apexi rep back

 

I have a B16A and Im running the same as you. CTR cams, ITR valve train, Skunk gears, and a mild port job. I have had my motor tuned and found that 5200 was the best point for my Vtec cross over...nice and smooth. But as stated before, tuning will do the trick prolly. Im thinking your needing more fuel once Vtec pops.

Just my experience and 2 cents.

Matt

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B-B-K &raquo;</TD></TR><TR><TD CLASS="quote">I have a B16A and Im running the same as you. CTR cams, ITR valve train, Skunk gears, and a mild port job. I have had my motor tuned and found that 5200 was the best point for my Vtec cross over...nice and smooth. But as stated before, tuning will do the trick prolly. Im thinking your needing more fuel once Vtec pops.

Just my experience and 2 cents.

Matt</TD></TR></TABLE>

See in his case it works out good for him with the crossover being that low..Just another case showing how every motor behaives differently....fuel could very well be the problem but just installing an aftermarket fuel pressure regulator isn't gonna do it..reason being that your ecu is only gonna give it what it has written in at that rpm. I mean it may squeeze out a bit more...but..well you know what you gotta do...haha..