I build an engine last year

B18c5
P30 oversize pistons
Skunk2 pro2 cams
STR cam gears

I take all clearance, Valve to valve and valve to pistons

I tune it on the dyno

it make a smooth powerfull curve with 194 whp

this year, 1-2000 km after the last dyno tunes(last year)

the owner change the intake manifold and Throttle body for skunk2 pro serie intake and 68 TB

he add a ebay tri-y header and a tanabe hypermedallion exhaust.

we lost so much power, that's incredible

look the dyno sheet when I compare last year and this year



one of the vtec lobes on the intake seem to have premature wearing...
the valve ajustement was perfect last year (0.007" In, 0.008") and still the same this year with this problem occured

thanks for your help, and tips to find the problem


Modified by Garrett at 11:36 AM 5/27/2008