ok, this has been a bit of a problem and i figured i'd as you gurus on HT.

i have a GSR with JUN 3 cams, cam gears, retainers, springs.

and I have a JUN ECU as well.

when i launch the car, 1st gear works perfectly fine. when i switch to 2nd gear everything is ok till VTEC and it has to fight thru for a bit, then it goes...

anybody have any ideas?

 

Tune It?

 

bog=too rich. tune it as mentioned.

 

Tune it.

 

when you say bog, do you mean like just sort of flat dead feeling? i have the same problem with my car and it "jerks" when enganging vtec...got to get it tuned!!

 

you cant use stock gsr vtec engagement on those cams. Turn vtec on at around 5800-6200 and you should be fine. But, yea, you should get tuned.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by turbociv &raquo;</TD></TR><TR><TD CLASS="quote">you cant use stock gsr vtec engagement on those cams. Turn vtec on at around 5800-6200 and you should be fine. But, yea, you should get tuned.</TD></TR></TABLE>

very good point, what rpm is your vtec engagement point set for?

 

Set the vtec up higher and add more fuel sounds lean

 

Do you even have the comression to support stage 3 cams because stock gsr compression is far from ideal!

 

i know it has been mentioned but have you tuned it with the cams yet???????????????? i am thinking that is your problem

 

problem is it isnt tuned..go git that **** tuned

 

question is, how do i tune it? i mean, i can go to the dyno at Endless garage, that's no prob. but my JUN ECU isn't able to change...the only thing i can tune is my FPR and my cam gears...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IntegraXTR &raquo;</TD></TR><TR><TD CLASS="quote">question is, how do i tune it? i mean, i can go to the dyno at Endless garage, that's no prob. but my JUN ECU isn't able to change...the only thing i can tune is my FPR and my cam gears...</TD></TR></TABLE>

vafc

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IntegraXTR &raquo;</TD></TR><TR><TD CLASS="quote">question is, how do i tune it? i mean, i can go to the dyno at Endless garage, that's no prob. but my JUN ECU isn't able to change...the only thing i can tune is my FPR and my cam gears...</TD></TR></TABLE>

Get rid of the Jun ECU and get something that is programmable.

 

hmmm, damn, thought the JUN ECU would've taken care of all that :/

yeah, i used to have a VAFC..looks like i'll have to get another one haha...damn.

that or Hondata =P

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by turbociv &raquo;</TD></TR><TR><TD CLASS="quote">you cant use stock gsr vtec engagement on those cams. Turn vtec on at around 5800-6200 and you should be fine. But, yea, you should get tuned.</TD></TR></TABLE>

This is the same problem I had with my Skunk 3s, it would bogg really hard when VTEC would x-over, raised VTEC from 4800 to 5800 and advanced the ignition timing a ton, I think when I was done I had 20 degrees of advanced ignition timing, felt good after that.

 

i don't remember where the vtec xover is on the JUN ECU, i think it's around 5700 or so. i have to check it out.

looks like i have to do some advancing and what not..

thanks for the input! anybody else? i guess i realllllllllly should go hop on the dyno and check :/

 

What header do you have on the car?

Everyone is saying tune it...which is right, but more specifically you have to have a header with a 2.5 collector and move your VTEC engagement up to 5800-6000.

Doing those 2 things alone will take much of the hesitation away. Then you need to get on the dyno and tune it.

 

hmmm, i have an Apexi GT header...

thanks for the tip!

 

dont think ive seen it mentioned yet, but what about cr?? with stock compression ratio id think you will have a hard time gettin much power out of a stage 3 cam, no matter how much tuning u do.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by all motor b20b &raquo;</TD></TR><TR><TD CLASS="quote">Tune it.</TD></TR></TABLE>

 

hondata then tune it

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 99b18 &raquo;</TD></TR><TR><TD CLASS="quote">dont think ive seen it mentioned yet, but what about cr?? with stock compression ratio id think you will have a hard time gettin much power out of a stage 3 cam, no matter how much tuning u do. </TD></TR></TABLE>

not always.......seen jun 3's make maddd power on lowish cr..in the 10's

 

Jun 3's Love compression though they are made for high compression motors the higher the better!!!

You could get yourself a p28 and run uberdata or crome

 

Definatley sounds like you need Hondata... good luck with it and definatley change vtec to engauge a little higher than normal to smooth things out. what kind of header and exhaust do you have? You might need something that's going to flow really well to feel better potential of those big cams! -Jason