RE: Drag Times. Post em up here
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RE: Drag Times. Post em up here - 8/31/2007 9:05:10 PM
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CBRrider01
Posts: 97
Joined: 3/16/2007
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That's one hell of a 60" time.. Nice run.
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RE: Drag Times. Post em up here - 9/1/2007 3:07:33 PM
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pro_mod_cbr1000rr
Posts: 5
Joined: 8/30/2007
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Well guys another night out for for test and tune and solved the problem spinning out of the hole but now my 06 CBR with 6 inch extended swingarm is now pulling the front wheel up about 2 1/2 feet out of the gates, got to find a happy medium somewhere. So that it doesn't spin at the launch nor pull the tire up so high. I tryed a front drag strap and it seemed to help a little but front end still comes up on me pretty good. any suggestions on where to go next. I was told add a little more air pressure to my rear tire and try not to come out of the hole at such a high RPM, sounds logical to me but what do you think??? Here is the latest track time from last night.
Reaction .......... .0825
60 FT .......... 1.6201
330 FT .......... 4.2113
1/8 ET .......... 6.3189
1000 ET .......... 8.1720
1000 MPH ...... 132.16
1/4 ET .......... 9.7240
1/4 MPH ......... 141.11
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RE: Drag Times. Post em up here - 9/3/2007 6:16:42 AM
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CBRrider01
Posts: 97
Joined: 3/16/2007
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I'm no expert on motorcycle dragging, so I can't give much advice but adding more tire pressure won't help any. I used to race a mustang that had a huge tire spinning problem. Dropped the pressure to 25 P.S.I. cold and it helped eliminate about 75% of the spinning........ I had 4 tires on the mustang and didn't mind if I wrinkled them a little bit because I could always buy another one if it caused any issues.. I don't know if I would want to cause that sort of wear on a street driven motorcycle tire???
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RE: Drag Times. Post em up here - 9/3/2007 9:48:49 AM
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pro_mod_cbr1000rr
Posts: 5
Joined: 8/30/2007
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Thanks for the help, I am running a 190/50ZR17 SHINKO R003 Stealth rear tire. It is pretty good for street and track use and new is only around $120 So I dont have really any problem with tearing it up a bit. On the first night out at the track I was running with about 18 psi and even after a good 3 to 4 second burnout tire would spin baddly out of the hole. On the 2nd night out at the track I dropped the air pressure to about 8 to 10 psi and after a good 3 to 4 second burnout now tire would grip great and cause the front of the bike to pull 2 1/2 to 3 ft off the ground to where I would have to let off the throttle for just a split second before nailing it again. Thats why I thought that it sounded alright I guess to add a little more air pressure to the rear tire and maybe find a happy medium so that the tire still wouldnt spin wildly, but not launch the front of the bike up into the air. any more advise guys would be greatly appreciated. And believe me I will try at least on pass with the replys that arnt to far fetched, and keep you posted on times and let you know the results of each.
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RE: Drag Times. Post em up here - 9/3/2007 10:10:52 PM
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CBRrider01
Posts: 97
Joined: 3/16/2007
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I think the key is to get to the pressure where you have no more spinning issues. Once that goal is acheived you probably shouldn't be looking for a partial spin/partial wheelie pressure, rather keep the pressure to the maximum where it won't spin and learn how to control the bike to keep from wheeling to hard via clutch/ throttle control...Again, I'm no expert, that's just my .02
< Message edited by CBRrider01 -- 9/3/2007 10:13:11 PM >
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RE: Drag Times. Post em up here - 9/3/2007 10:16:58 PM
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CBRrider01
Posts: 97
Joined: 3/16/2007
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Came from the races Friday night and STILL could not figure out why I could not beat my best times...Even with better, more dense air and same 60' times.. On the way home I decided to do some "playing" with my seat of the pants dyno....So I stayed in first gear @ about 9k rpm, let to about 1/4 throttle for about 1/2 a second then gooses it. Front end came up...Tried this @ 10k RPM, same result, again @ 11 same result, 12k Same result with slightly less force, 13k no front end coming up... Same with second gear, but couldn't pull it up EASILY @ around 12... I think I found my issue. Maybe it's that I'm shifting to late after the powerband drops off and by the time I shift into the next gear I'm near peak torque in the middle or end of my powerband... The gear ratios seem really close together, and IIRC the torque curve falls ahead of the HP curve, so next week I'm going to try shifting @ 11-11.5K thru the first two gears and shifting @ 12k in the final gear to see if that helps my time any.... I'm thinking if I shift @ 11-11.5K that with the tight gear ratios, I should be shifting into around 8-9K in the lower closer together gears which puts me in the beginning of my "seat of the pants" torque curve.....We'll see what happens....and maybe next week I'll get those dam -.008, -.030, -.054, reaction times on the positive side.
< Message edited by CBRrider01 -- 9/3/2007 10:23:16 PM >
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RE: Drag Times. Post em up here - 9/4/2007 12:15:57 PM
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pro_mod_cbr1000rr
Posts: 5
Joined: 8/30/2007
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Excellant, I played around a bit today west of town on my day off of work and tryed out a few things, and here is the result that I came up with. If I eat the tire up for just a few quick seconds, running the tire at 14-15 psi and only coming out of the hole at around 4K instead of 45or 5K tire sticks pretty good considering I'm not at the track and front tire only pulled up 6-8 inches which is much easier to handle when running throttle wide open. Not sure if my times will increase that much or not but I will keep you posted once I take er back out to the track on Wednesday Night. Thanks again and I think that you were right on when you said get the tire to stick and work it with the clutch and throttle. Big help I appreciate it. ALOT Thanks
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RE: Drag Times. Post em up here - 9/4/2007 5:05:33 PM
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ClutchBurningRacing
Posts: 100
Joined: 7/25/2006
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Times look good!! Also nice to see some more Hondas at the track! I have run that Shinko for awhile now and for me 12lbs cold worked best at 68 inches. The tire realllly likes to be warmed up. do like a John Force burn out, you will not notice hardly any tire wear. As far as pulling the wheel, how low is the bike? The strap will help from transferring too much weight too fast, slowing the wheelies. Do you still have the stock rear shock? Some guys launch hard causing a "Pogo" effect pulling the front wheel up. Meaning the shock goes down fast and comes back up fast. Not sure how much adjustment the shock on the 1000 has but you want it to go down fast and back up as slow as you can get it. As far as the power range, not sure my 600 seems to like it around 13500 to 14000 and redlines at like 15200. Are you still foot shifting?
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RE: Drag Times. Post em up here - 9/5/2007 4:04:17 PM
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pro_mod_cbr1000rr
Posts: 5
Joined: 8/30/2007
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Yes I am still foot shifting, thought about going to air shifter but It is still my daily driver as well. The bike has been lowered about 4 inches but with the 6 inch extentions only lowered it about 2 or so. And yes rear shock is still stock and left at stock settings, I purchased this bike brand new 3 months ago and am pretty new to the whole drag racing scene as far as bikes go. What type of rear shock do you recommend going with or can I make adjustments on the stock spring? thanks for the help
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RE: Drag Times. Post em up here - 9/5/2007 7:03:37 PM
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ClutchBurningRacing
Posts: 100
Joined: 7/25/2006
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Depends on how much u want to spend. Adjust it $0, re-valve it $350, good =ohlins $900, better=Hyperpro $1500. How serious u wanna get? I would talk to some experianced locals that could show u how to adjust it and keep it streetable. I still ride mine on the street but it is a little rough riding. I saw a guy in MS. with the same set-up u have only a air shifter extra, he was running 6.10 in the 1/8th. For only doing it for a few months, your pretty good at it already! And u want your front wheel in the air a little off the launch to transfer weight.
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RE: Drag Times. Post em up here - 9/19/2007 8:31:39 PM
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ClutchBurningRacing
Posts: 100
Joined: 7/25/2006
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Took the 600rr to the 1/4 mile track sunday was a little hot, hitting the red line top of fourth gear at the line.
60ft 1.708
330' 4.505
1/8 6.834 @ 105.34
1000' 8.874
1/4 10.624 @127.92
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RE: Drag Times. Post em up here - 9/27/2007 6:59:16 PM
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chopaleg
Posts: 28
Joined: 5/12/2005
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Bone stock 2007 CBR1000RR, No pipe, PC3, No air box mod, Stock as a rock besides the 4" over extentions on the arm and lowered and straped in front and 1 tooth down in front. 9.51 @144 MPH with a 195 lb rider. Not bad for a Honda....:)
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