Toda B cam information!!
My vtec point is 5900rpm and my mate got 7300rpm when vtec kick in.

What is your vtec point? when i adjust the cam gear, do i need to change the vtec point as well?

 

7200rpm was my best crossoverpoint

 

have the tuner make those changes, play it safe.

 

What rpm is your maxi power?

 

Edward's talking bout my car, crossover is at 7300rpm.



That dip pre-VTEC I think can be fixed, looks like the VTEC fuel added value is too high in the AEM EMS so its got a rich spot at VTEC crossover. Also need to do a cam gear tune. Will the cam gear positioning affect the optimal VTEC crossover point?

N.B. This is a dyno dynamics dyno and reads lower than US dynos, FWIW a stock dc2r makes around 92kw on this dyno.

 

Dyno graph showing AFR, not the rich spot at VTEC crossover:

 

Mines 6800

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Big Phat R &raquo;</TD></TR><TR><TD CLASS="quote">Mines 6800</TD></TR></TABLE>
so is mine, but i'm using spec c.

 

my spec B crossover is 5500.....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rodney &raquo;</TD></TR><TR><TD CLASS="quote">my spec B crossover is 5500..... </TD></TR></TABLE>

Holy crap.... are you on stock compression? What are your cam gears at?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jim80y &raquo;</TD></TR><TR><TD CLASS="quote">

Holy crap.... are you on stock compression? What are your cam gears at?</TD></TR></TABLE>

this is prolly why, i didnt feel satisfied with my toda bs, plus i didnt have it dyno tuned either.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1993sirimback &raquo;</TD></TR><TR><TD CLASS="quote">this is prolly why, i didnt feel satisfied with my toda bs, plus i didnt have it dyno tuned either. </TD></TR></TABLE>

haha that is your problem...

each car will have a different vtec cross over point with different setups...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by esponet &raquo;</TD></TR><TR><TD CLASS="quote">so is mine, but i'm using spec c.</TD></TR></TABLE>

ditto that. 6800 here with spec c's and stock compression.....!

when I had spec b's, the best crossover was 6200..... fyi...

 

on average its 7k for toda b and c.............

 

This is what I've heard too, apparently optimum crossover is between 6500-7400 rpm.

What I'm trying to find out is how the cam gear settings affect the optimum VTEC crossover point. I think my cam gears are both advanced a little, so is this the reason for the crossover being best set at 7300 rpm? Will retarding the exhaust cam lower the best VTEC crossover point?

 

i made best power at 5500, car works very well. i have been running it for 4 years this way. yes, stock compression (although 2 layer headgasket, so a smidge more)

 

Is it different cam gear setting with different vtec kick-in point?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bbasso &raquo;</TD></TR><TR><TD CLASS="quote">have the tuner make those changes, play it safe.</TD></TR></TABLE>

My thoughts exactly. My tuner has made many suggestions as to my setup, and is very experienced and reputable, so I take it with confidence.

 

Mine used to be 5800 setup by Tuner..
but I dont know. some of my friends using Toda B are hitting Vtec on 6500 in avg.
I play with Power FC commander a bit and setted it on 6000 now.. wonder if I want to tune it myself and try different setting.

Moreover.. dod the VTEC kick-in Sound DISAPPEAR after you got the cams? Mine is gone ...

Btw, my setup is Toda B, Cam Gears, Toda Egg shape springs, Toda Head Gasket and Toda timing belt..440cc fuel injectors..Sard fuel regulator at 300 kpa. wonder if it affects anything on setting up

 

ttt

 

When I changed cat-back from 5zigen(no cat.) to Mugen(high flow cat), my v-tec sound also disappeared.
I think the sound of vtec depends on your exhaust.

 

I have been using 5Zigen border 304 Speed and Fujitsubo Power Getter, both got no Vtec sound after.. oh well..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sinister6 &raquo;</TD></TR><TR><TD CLASS="quote">Mine used to be 5800 setup by Tuner..
but I dont know. some of my friends using Toda B are hitting Vtec on 6500 in avg.
I play with Power FC commander a bit and setted it on 6000 now.. wonder if I want to tune it myself and try different setting.

Moreover.. dod the VTEC kick-in Sound DISAPPEAR after you got the cams? Mine is gone ...

Btw, my setup is Toda B, Cam Gears, Toda Egg shape springs, Toda Head Gasket and Toda timing belt..440cc fuel injectors..Sard fuel regulator at 300 kpa. wonder if it affects anything on setting up</TD></TR></TABLE>


fwiw, my spec c's had very similar powerbands with the vtec crossover at 5600 and 6800... With the higher crossover, there was slightly more area under the curve, so we left it there.....

But you can't really hear my crossover at all - because that is a function of the cams due to the primaries being so big... it just spits a bit and keeps pulling hard...

Don't worry about the lack of noise to indicate crossover - it's a smooth transition to vtec, that's why there's no kick.....

If you want to feel/ hear a serious kick for vtec, try jun 3's.....!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by powerfulperformance &raquo;</TD></TR><TR><TD CLASS="quote">on average its 7k for toda b and c.............</TD></TR></TABLE>
you can add the D's as well
7500rpms w/ 12.3CR

 

Thanks for the info Black R, no I dont want other cam, I just feels weird that the sound has completly gone (well there is but super faint), The car pull quite hard i must say, and I actually like that, keep me to a low profile.