Today we dyno tuned our first 2005 F7 EFI.
Kaz was bringing his his new sled to tune, figuring on relying on his
D&D pac to drop fuel pressure to optimise HP. We had communicated
by phone a few times and I suggested as I always do with EFI F7ers:
install a 2 or 3 degree key ahead of time (all smart F7 riders need
that). It’s more economical to do that in your garage than on my dyno
at $125/hr. Come here with timing key in place and we’ll be done more
quickly.
Normally that means a baseline test or two, 10-1 A/F ratio is typical,
then reduce top end fuel pressure with a main jet, a D&D pac needle
jet, or any other needle valve to do the same thing.
So Kaz brought his new ’05 F7, remember he has a 2 degree offset key,
and blasted two runs back to back cool and hot, 147
HP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Then we installed a Speedwerx single and added more HP.
Then we choked down the fuel pressure with D&D pac and added even more.
That two degree key adds a few HP but this is unbelievable. Base
fuel flow lb/hr on this ’05 F7 was 99-100 lb/hr. One hour earlier
we had a 03/04 F7 on the dyno, 110 lb/hr base fuel flow. Was this
another anomoly like Mike “Ziggy” Zigmont’s ’04 F7? Or is this how the
new “05’s are tuned by AC?
I’ve got all the dyno numbers here, SFD files, etc, if I can stay
awake I’ll post them tonight. If I can’t stay awake I’ll try later this
weekend. Everyone needs to see this.
I’m dynoing three sleds tomorrow (Bikeman F8, Speedwerx 1000, ZR900
mod) then dynoing two more on Sunday (both SLP ported ProX800’s).
Spiders build fancy mosquito-catching webs on my dyno all summer. But
in the fall the cool air sets in, and the spiders flee as the hordes of
blue, yellow, green, red, black, and orange sleds converge here to dyno
tune, having great fun optimizing whatever they have.
Also there is a new Fusion sitting at Cooper Sales and Service waiting
for me to have two days to test and tune. Maybe next week. Plus the new
MachZ’s hare on their way, we need to dyno one of those before the Old
Forge Shootout.