Expected 1/4 mile et?

[Phantom187hp]

Ok guys / gals...
Im hitting the track this weekend and wanted some input on what to expect from my 08 Busa. Been riding 15+ years but never been down the track on a bike. My 08 has a Brocks Alien head full system, a power commander w/street tune and put down a true 186hp to the rear tire. I weigh 240 and think I should clock in right around 9.90-10.20 based on my buddies similar size and setup on his ZX14....any tips?

[HighOnBusa]

Should be in the 10s around 140MPH.

[dadofthree]

Don't get pissed if your first run is 11.00 / 137

Depending on the track these bikes can give you a good ride that first 60' and getting your foot up to hit second gear can be a biotch. That's why guys that do this run air shifters. A stock Gen II can run low 10s.

Is the gearing stock ?

[Got-Busa?]

It all depends how well you can launch. If you can get your 60' in the 1.7-1.8 area you will go 9's pretty easy. If you are stuck around 2.0+ you will be low 10's. Make sure you rev her to 11,500 indicated on the tach or your MPH will be low...

[HighOnBusa]

It all depends how well you can launch. If you can get your 60' in the 1.7-1.8 area you will go 9's pretty easy. If you are stuck around 2.0+ you will be low 10's. Make sure you rev her to 11,500 indicated on the tach or your MPH will be low...
I ran mine this pass Sat and I ran 10.02 @143 60 foot was 1.78, 660 foot was 6.5 @ 115 lunching @ 6500

[dadofthree]

Make sure you rev her to 11,500 indicated on the tach or your MPH will be low...

Just curious, are you kidding. I know the Gen I torque ran out around 9,500, didn't think the Gen II did much better. Always heard you need to shift prior to the torque curve running out. I also thought that the rev limit hit prior to 11,500. Just curious.

[HighOnBusa]

Just curious, are you kidding. I know the Gen I torque ran out around 9,500, didn't think the Gen II did much better. Always heard you need to shift prior to the torque curve running out. I also thought that the rev limit hit prior to 11,500. Just curious.
If you would shift in the torque curve the RPMS will be lower then shifting at 11,500 in the next gear, and you'll be loosing MPH and time to get the RMPs up to your max torque in the next gear

[Phantom187hp]

Don't get pissed if your first run is 11.00 / 137

Depending on the track these bikes can give you a good ride that first 60' and getting your foot up to hit second gear can be a biotch. That's why guys that do this run air shifters. A stock Gen II can run low 10s.

Is the gearing stock ?

Thanks for the input guys......

Yeah it gets pretty sick on the street with the stock tire. Blows completely through 1st then stands straight up on the 2nd gear pull. The gearing is all stock for now. I got a new Shinko stealth super soft going on this week that should help the hook. Prob is, stock height and stock swingarm so yes its gonna be a hell of a ride to the 60' mark! Ive been racing for years on 4 wheels and have a couple friends that are NHRA licensed and dominated the nopi radial class for years who now run bikes to give me some pointers. One actually runs NHRA pro stock currently so I might see if he has any bike tips for me. But otherwise just gonna pick a good line and give it hell...haha. Just hit 3k on the odo...think I should change the oil before hand to get good slip on the clutch?

[dadofthree]

If you would shift in the torque curve the RPMS will be lower then shifting at 11,500 in the next gear, and you'll be loosing MPH and time to get the RMPs up to your max torque in the next gear

Still confused. Don't race and not an expert on torque or anything for that matter. The Busa's normal torque range is 4K to 9 - 9.5K. When shifting I normally drop about 1K, well within the torque band for this monster. Mine kicks my rear tire out hitting second and sometimes third.

Just curious, because floating valves and bumping rev limits won't make MPH IMHO

[Got-Busa?]

I ran mine this pass Sat and I ran 10.02 @143 60 foot was 1.78, 660 foot was 6.5 @ 115 lunching @ 6500

Your MPH is very low for a Gen-II....what mods (track elevation)?

Just curious, are you kidding. I know the Gen I torque ran out around 9,500, didn't think the Gen II did much better. Always heard you need to shift prior to the torque curve running out. I also thought that the rev limit hit prior to 11,500. Just curious.

No, why would I be kidding...?

Gen-I and Gen-II are completely different. Gen-II stock peaks around 10,500 and with any GOOD pipe it will hold the power all the way to redline (11,000 actual) but the tachs are off big time. 11,500-600 indicated is where you need to shift with a Gen-II. :oh yeah:

Gen-I is around 10,600 but I always shifted as high as possible without bumping the limiter. Anything less and the times dropped with the MPH... :(

[HighOnBusa]

Your MPH is very low for a Gen-II....what mods (track elevation)?



No, why would I be kidding...?

Gen-I and Gen-II are completely different. Gen-II stock peaks around 10,500 and with any GOOD pipe it will hold the power all the way to redline (11,000 actual) but the tachs are off big time. 11,500-600 indicated is where you need to shift with a Gen-II. :oh yeah:

Gen-I is around 10,600 but I always shifted as high as possible without bumping the limiter. Anything less and the times dropped with the MPH... :(
Ti-Force Full system 4-2-1-2 PC with a mild tune and BMC air-filter. I kinda though the same thing. I was in 4th at around 9500 RPMs the the end of the track. And I had a pass that was 10.2 @ 144 MPH...

[Got-Busa?]

Ti-Force Full system 4-2-1-2 PC with a mild tune and BMC air-filter. I kinda though the same thing. I was in 4th at around 9500 RPMs the the end of the track. And I had a pass that was 10.2 @ 144 MPH...

Who did your tune....?

If you are stock height and not reving her out, that could explain it but still should be faster than that. Try not leaving at such a high RPM and get wide open throttle by the 60' beam. Even if you bog see if you can get your 330' and 1/8 mile times down more.... :cheers:

[dadofthree]

Your MPH is very low for a Gen-II....what mods (track elevation)?



No, why would I be kidding...?

Gen-I and Gen-II are completely different. Gen-II stock peaks around 10,500 and with any GOOD pipe it will hold the power all the way to redline (11,000 actual) but the tachs are off big time. 11,500-600 indicated is where you need to shift with a Gen-II. :oh yeah:

Gen-I is around 10,600 but I always shifted as high as possible without bumping the limiter. Anything less and the times dropped with the MPH... :(

Thanks for replying. I had no idea you could run these bikes that high. Been shifting mine in mid 9's.

[HighOnBusa]

Who did your tune....?

If you are stock height and not reving her out, that could explain it but still should be faster than that. Try not leaving at such a high RPM and get wide open throttle by the 60' beam. Even if you bog see if you can get your 330' and 1/8 mile times down more.... :cheers:
Stock hight not stratched.... It was a basic tune that i got of off Dyno Jet website for the set I have. Still havent had time to dyno tune it.

[rkcain]

With your set up ,youshould run low to mid 10s heat that tire or you will go no where. Withh stock swingarm I would not go over 5000 rpms at line.
Slip clutch and give it all she got. Get her dynoed and you will know where your high torque is. Should be around 10500 to 11300 rpms. Drag racing is all about your torque,not so much your hp
Mine is lowered 2 in. And stretched 7 in.pc custom tuned on a dyno jet,kn race filter ,kn high flow oil fiter,syn repsol oil,geared 1 down front,1 up rear,shinko 005 200 rear tire,super spring on rear shock and more. I run 9.5s at 154. Good luck!

[dadofthree]

Found this dyno sheet on another web-site. Stock Gen II

[dadofthree]

So based on this chart. What would you guys think a good shift point would be ? and explain your answer.

Looks like HP peaks around 10K and torque a little before that.

[Got-Busa?]

LOL...so what RPM does the tach read at 10K...? ;)

All these bikes have aftermarket exhaust so maybe you should post the other graph... :whistling:

[dadofthree]

LOL...so what RPM does the tach read at 10K...? ;)

All these bikes have aftermarket exhaust so maybe you should post the other graph... :whistling:

Just trying to figure out a good ball park shift point. 9.2 - 9.5 is what you use to hear about the Gen I, just wondering about the Gen II.

[Got-Busa?]

Just trying to figure out a good ball park shift point. 9.2 - 9.5 is what you use to hear about the Gen I, just wondering about the Gen II.

No offense but have you ever raced your bike? I don't know anyone that has shifted a Gen-I at that low of RPM. Try both shift points and let me know which one is quicker and has a higher MPH... :cheers:

[dadofthree]

No offense but have you ever raced your bike? I don't know anyone that has shifted a Gen-I at that low of RPM. Try both shift points and let me know which one is quicker and has a higher MPH... :cheers:

I don't race and that doesn't offend me. I guess what I can take from this is shift the Gen II around 11K if you're trying to get as much as you can out of the bike.

[Got-Busa?]

I don't race and that doesn't offend me. I guess what I can take from this is shift the Gen II around 11K if you're trying to get as much as you can out of the bike.

Is the bike stock or piped?

If it's got a pipe, I would try 11,600 on the tach. Remember the tach has more error than the speedo. 11,600 on the tach is closer to 10,800ish actual. That's why I always tell everyone to shift higher since they really are just getting into the power band if they shift early.... ;)

[dadofthree]

Is the bike stock or piped?

If it's got a pipe, I would try 11,600 on the tach. Remember the tach has more error than the speedo. 11,600 on the tach is closer to 10,800ish actual. That's why I always tell everyone to shift higher since they really are just getting into the power band if they shift early.... ;)

Thank you sir, running Brocks Street Shortmeg with PC . My speedo for some reason is accurate according to SCHP. Don't know about the tach.