gearing recommendation

Originally posted by blubyubusa on May 10 06

   I read your response to SPYBUSA concerning gearing and drag racing. My question is somewhat different, I hope. The guys at the track all recommend for the eighth mile (which is what I run most often) that you go thru the finish line in third and immediately hit the rev limiter. After reading a lot of your recommendations, I realize that quite a bit of what you hear at the track  is not necessarily true.  My last trip to the track, I ran a 5.85, two 5.86s, a 5.89 and a 5.91 with 1.50 sixty foots. The gearing was 16/42 and my mph was approximately 122 and I was well in fourth. I have had some low 1.40 sixties with a 43 on the back which is what I just put back on, but again the "guys at the track" say that I ought to leave at a higher rpm or something so that I can go through the lights in third! What do the experts say? I use an MRE shifter (which trips the FI light and drive me nuts) do the extra shifts hurt that much? I weigh about 220.and no nitrous yet.
2005 Busa at about 68"
1397 with no head work and .385 lift cams on intake and exhaust
BDE Gen III exhaust and your map
Thank you very much.

Author	Message / View First Unread Post Share Topic Printable Version Delicious Digg Facebook Furl Google Boomarks Google Buzz MySpace Newsvine reddit StumbleUpon Translate Twitter Windows Live Yahoo Bookmarks Topic Search Topic Options Post Reply Create New Topic
blubyubusa Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: December/25/2005 Online Status: Offline Posts: 5	Post Options Post Reply Quote blubyubusa Report Post Quote Reply Topic: gearing recommendation Posted: May/10/2006 at 7:17pm
	I read your response to SPYBUSA concerning gearing and drag racing. My question is somewhat different, I hope. The guys at the track all recommend for the eighth mile (which is what I run most often) that you go thru the finish line in third and immediately hit the rev limiter. After reading a lot of your recommendations, I realize that quite a bit of what you hear at the track is not necessarily true. My last trip to the track, I ran a 5.85, two 5.86s, a 5.89 and a 5.91 with 1.50 sixty foots. The gearing was 16/42 and my mph was approximately 122 and I was well in fourth. I have had some low 1.40 sixties with a 43 on the back which is what I just put back on, but again the "guys at the track" say that I ought to leave at a higher rpm or something so that I can go through the lights in third! What do the experts say? I use an MRE shifter (which trips the FI light and drive me nuts) do the extra shifts hurt that much? I weigh about 220.and no nitrous yet. 2005 Busa at about 68" 1397 with no head work and .385 lift cams on intake and exhaust BDE Gen III exhaust and your map Thank you very much.

Brock Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Admin Group Joined: October/01/2003 Location: Dayton, OH Online Status: Offline Posts: 139	Post Options Post Reply Quote Brock Report Post Quote Reply Posted: May/30/2006 at 6:48pm
	The new MPS box won't trip the light...drove me nuts also. I don't change anything different between 1/8 and 1/4 mile racing. The set-up which makes the bike fastest and easiest to ride consistently on the front 1/2 of the track is the set-up we want...the bike has NO IDEA the track is shorter when you race 1/8 mile� That being said- you would want to go through the traps as close to redline as possible- and one less shift might help a bit. BUT- not at the expense of loosing your front half et. I hope this helps. Brock

Paula Racing Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: April/04/2003 Location: Netherlands Antilles Online Status: Offline Posts: 8	Post Options Post Reply Quote Paula Racing Report Post Quote Reply Posted: May/30/2006 at 10:41pm
	Quote: Originally posted by blubyubusa on May 10 06 I use an MRE shifter (which trips the FI light and drive me nuts) do the extra shifts hurt that much? I weigh about 220.and no nitrous yet. The solution to that problem is easy just open the MPS box and cut the ground wire that goes to the relays. Works every time for me and my customers.

bigloulove Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: July/25/2004 Location: United States Online Status: Offline Posts: 1	Post Options Post Reply Quote bigloulove Report Post Quote Reply Posted: May/31/2006 at 1:43am
	2004 BUSA, SMALL AIR BOX MOD, PAIR MOD, HINDLE EXHUAST, POWER COMMANDER, WITH IRIDIUM PLUGS. TOOK BKIE TO GET AIR/FUEL MIX AND DYNO. TECH SAID BIKE WAS RUNNING TO LEAN ABOVE 6000 RPM, LIKE OFF THE CHART LEAN. TECH SAID MAY NEED FUEL PUMP OR FUEL REG. OR I HAVE A AIR LEAK SOME WERE. HE ALSO CHANGED HIS SNIFER THAT HAD TWO CRACKED DIAFRAMES. HE PUT A OLD ONE ON AND GOT THE SAME READINGS. DISCONNECTED POWER COMMANDER WITH SAME RESULTS. HEEEEEEEEELLLLLPPPPP!!!!!!!!!!!!!!!!!!!!
	love to go fast, love to live fast