QUOTE(Valy @ Mar 7 2012, 05:44 PM)
Nice.
1. Check your dizzy. That pimple at 3600 RPM points me in that direction.
2. What do you use for induction?
3. Which cam and how is the idle?
Nice call......checked & dizzy is completely missing! Heh, heh.....mainly 'cause I'm on SDS for spark and fuel....
Induction is huge mother CB throttle bodies with 30 pound "red top" injectors (old Bosch number 280150945, new MP2021).
Cam is Jake's 9560.
I'm on TP sensing as vacuum signature is hopeless at low throttle openings. Idle is great, very steady nice lope to it. I keep it about 1200rpm due to poor oil pressure after track sessions when oil temp is high.
The really screwy loop de loop on the 1st pull was the operator backing out & going back in for some reason. The other two runs are showing an interesting slope change there at 3750....SDS has an "accelerator pump" feature and the dyno operator was laying into it starting at 3000, so some rich/lean effect may be there. I might be able to fine tune that a bit more to smooth it....