View Full Version : Stratus Head Speed
buster1
09-17-2006, 10:23 PM
What head speed are you guys running for full-on 3D??
tnreefguy
09-17-2006, 10:32 PM
I heard some guys are like turning 1900+
Rada70
09-18-2006, 10:49 AM
It depends on what kind of engine it has.
buster1
09-19-2006, 03:39 PM
Running the YS91II
DavidH
09-19-2006, 03:44 PM
YS 91 on 8.45
1750-1850 is the range you would need to use.
1850 is really pushing the YS 91 on 8.45. That would be keeping the motor at 15,600 rpms. Powerband on the YS 91 is around 14,700 rpm up to about 15,100.
David
Turbo Dave
10-03-2006, 10:02 PM
Im running 8.18 on th YS91 with 1950 Headspeed and it all good so far...Heeps of power!!!
Knud Pedersen DENMARK
10-11-2006, 03:34 PM
Hi Turbo Dave
Im running 8.18 on th YS91 with 1950 Headspeed and it all good so far...Heeps of power!!!
what muffler are you using?
tnreefguy
10-11-2006, 05:21 PM
maybe its time to rethink the YS.
G MAN
10-13-2006, 06:30 AM
Dont know why people keep saying YS has lower power band that OS,it has higher exhaust timing which will raise the engines power curve. I have seen a lot of YS engines at 15500 rpm and they run great. DOUG
Kyle Davis
10-18-2006, 07:12 PM
I ran a YS 91 with a headspeed between 1800 and 1850. That seemed to work very well and that is with both the hatori and the curtis pipe
Aviation addict
10-19-2006, 10:07 AM
What gear ratio Kyle?
Kyle Davis
10-19-2006, 11:57 AM
8.45 is what I ran