Originally Posted by Chris N
What is the deal with the vtec spike? Mine is SUPER violent.....
Mugen Intake - JDM OEM 4-1 - Fujitsubo RM-01A - 18 degrees timing (red)
Blue = 21 degrees timing.
The vtec spike is the huge amount of fuel that the stock computer throws in ~4500rpm in preparation for the huge increase in air flow once the larger lobe is engaged. Honda didn't want these kaas break'n
Here's an old map of my car 3 years ago tuning that crap out-a-there by lowering vtec & letting the air in!!
It's still a little spiked because the Field only lets you tune at 1000rpm increments.
It looks a little smoother on the mustang dyno (although #'s will always report lower - the mustang dyno is where I tuned the fuel out.)
Anyway that's my .02
