My launch practice helped, and I was able to squeak a 1.694 and 1.693 60-foot times... with 1/8 mile ET's of 7.082 and 7.096... I'm hoping those are good for high 10-second timeslips at a 1/4 mile track!

60' - 1.706
1/8 mile 7.14 @ 98.5 mph

60' - 1.693
1/8 mile - 7.082 @ 99.1 mph

60' 1.694
1/8 mile - 7.096 @ 98.3 mph

60' 1.702
1/8 mile - 7.106 @ 98.4 mph

 

Those should be good enough,mainly depends on what kind of mph you pick up on the back half,bike sounds good,shifts sound really good,frankly I'm surprised you time is not a little quicker,what are you shifting at?

Never mind,just noticed how much weight that little F4i has to haul,let me change that to "dude,yer haulin!".

I am 'bout 175 in my gear and my 98hp setupfordragracing F2 could pull about 7 flat in the 1/8 and 10.9's @ 123-125 mph.Best was 10.86 @ 128.5,but that was on C12.Bike weighed 390 lbs.

Mine could pull past redline (13,000) but I shifted at 12,maybe 12,200 after I got the shift light and experimented. Foot shifting,stock wheelbase.My Blackbird redlines at 10.700 and I shift at 10,000.I have tried other rpm's but 10 is definately the best.800-1000 from redline always seems to work best

 

Yup, I'm 220-225 suited!

I'm shifting at 13500 on the tach, but that probably means it's really about 14000? I tried shifting earlier (~13000 on the tach), but it lost mph.