ok when my Vtec engages, it doesn't feel as if it pulls that hard...almost as if it engages smoothly, no jump in rpms...different sound, but doesn't jump like my friend's, LS/Vtec...its a JDM itr motor running on a stock civic VX fuel pump (the fuel pump is what i believe the problem is)...my buddy's LS/Vtec has the USDM type-R complete head with a stock type-R fuel pump and his pulls amazing...is my problem the stock VX fuel pump? will a Type-R fuels pump cure this? thanks for all the help

 

at what rpm?what ecu?any mods done?

 

5200rpm, Mugen chipped P28, I/H/E, fuel rail, fuel pressure reg., ctr pistons...

 

bUMp for some help

 

if you are running B series (which I assume you are because of the CTR pistons) the vtec should sound different, not necessarly feel 100% different. do what I did, disconnect it (vtec sensor) and drive it around. (btw, your CEL will be on) if there is a difference, there is nothing wrong. if there is no difference, well, start troubleshooting....

 

you need tuning...
Go visit a reputable dyno place and pick up a VAFC to fine tune the Mugen program, along with some adjustable camsprockets.

btw, stock ITR VTEC x-over point is 5700rpm. Although when you go get tuned, they'll probably drop your vtec point to about 5300-5400rpm.

 

i have a vafc...its been tuned for vtec engagment at 5300...its tuned as much as it can be, except for the cam gears...need adjustable ones...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by egSpoonR &raquo;</TD></TR><TR><TD CLASS="quote">i have a vafc...its been tuned for vtec engagment at 5300...its tuned as much as it can be, except for the cam gears...need adjustable ones...</TD></TR></TABLE>

dyno tuned?