Gen 2 stage 1 turbo bike

Got the bike pretty much dialed in. This max is boost at 100mph all the way to max speed. I thought the bike would be much faster then this for making 450 whp. Going to make some changes over winter to the set up and just play with it next year. 2.60 was my best time. Right now it’s 2.7x to 2.84. The gearing I’m running isn’t crazy tall. Going to try a different gearing set up after this weekend and see if I can go faster.

A6C3364B-EBCB-4D79-9D1D-434935F6A82F.png
 
Was doing some thinking today and going to play with tire pressure before changing anything else. See if I up the tire pressure with the hookup if it goes any faster. Might also try a dragmax before winter if I have time.
 
busakiller said:
Was doing some thinking today and going to play with tire pressure before changing anything else. See if I up the tire pressure with the hookup if it goes any faster. Might also try a dragmax before winter if I have time.
Click to expand...
a guy like you.... someone who is looking to grudge/ roll race. Maybe a maxxecu with its rolling anti-lag/ and datalogging capabilities would be of benefit? is that what u were thinking about doing? maybe an ultra plenum? lol.... im good at spending other peoples money.
 
Last edited:
TucoSalimonca said:
a guy like you.... someone who is looking to grudge/ roll race. Maybe a maxxecu with its rolling anti-lag/ and datalogging capabilities would be of benefit? is that what u were thinking about doing? maybe an ultra plenum? lol.... im good at spending other peoples money.
Click to expand...
I think this winter I will do little things and a gear change. Next winter I will redo the motor. Bore it 2mm and port the head and cams. Then probably do max ecu.
 
busakiller said:
I think this winter I will do little things and a gear change. Next winter I will redo the motor. Bore it 2mm and port the head and cams. Then probably do max ecu.
Click to expand...
I would have guessed a crank(stroke) before the bore... i remember hearing alot of things about head gasket intergirty when u give up that space between cylinders, Some get away with it.... but u push that bike pretty hard often. This bike i got has a big valve head from cnc comp and turbo cams... here is what it did on pump... 18 pounds (9-1 motor) on 93 octane........... most any big turbo intercooled pump gas bike makes 380 on 18 pounds pump. Truith be told.. the head WANTS more rpms badly... bike was still making power near redline on the c16 pulls they did. but im scared to push toooo many rpms. The turbo is a gen1GTX4088. old school stuff from a super ultra kit. Headwork and turbo cams didnt blow me away... not with an 11K redline anyway. The second dyno sheet was an ABORTED pull because it spun the drum over 200MPH.. but u can clearly see its still climbing hard at 10K rpms... the cams clearly moved the powerband upward.... but im sure it would have made 650 if the rpms were bumped up to 12K and 3 more poiunds of boost were added. Just wanted to share this info......... I dont go racing with any of u guys so not hiding anything. I enjoy this stuff tho.




1662737404029.png


FullSizeRender.jpg
 
See the problem is I want to have boost at 6k rpm’s. That’s where my start speed is. Anti lag would help but need a turbo to spool lower in the rpm range. Brake boost helps but it’s never constant at what psi you can get it up too.
 
TucoSalimonca said:
I would have guessed a crank(stroke) before the bore... i remember hearing alot of things about head gasket intergirty when u give up that space between cylinders, Some get away with it.... but u push that bike pretty hard often. This bike i got has a big valve head from cnc comp and turbo cams... here is what it did on pump... 18 pounds (9-1 motor) on 93 octane........... most any big turbo intercooled pump gas bike makes 380 on 18 pounds pump. Truith be told.. the head WANTS more rpms badly... bike was still making power near redline on the c16 pulls they did. but im scared to push toooo many rpms. The turbo is a gen1GTX4088. old school stuff from a super ultra kit. Headwork and turbo cams didnt blow me away... not with an 11K redline anyway. The second dyno sheet was an ABORTED pull because it spun the drum over 200MPH.. but u can clearly see its still climbing hard at 10K rpms... the cams clearly moved the powerband upward.... but im sure it would have made 650 if the rpms were bumped up to 12K and 3 more poiunds of boost were added. Just wanted to share this info......... I dont go racing with any of u guys so not hiding anything. I enjoy this stuff tho.




View attachment 1655197

View attachment 1655198
Click to expand...
Rob set my rev limit to 10800. Said the bike didn’t like high rpm’s. So I would like to change that so my gears are longer and I might just change 1st gear out for a shorter gear so I can have the bike in the right rpm range for 1st gear. But I could explore a different turbo that spools up faster. They make turbos with spool valves to make them spool faster but they still make big top end power.
 
TucoSalimonca said:
why not gear it deeper?
Click to expand...
Gear it deeper would work but then I have no top speed. Lol. Plus the deeper you gear it the shorter your gears are. I can brake boost the bike now but it’s doesn’t make much boost on the hit and it takes for every for the bike to make the boost I command it to with the boost controller. By the time I hit redline in my start gear it finally hits target boost.
 
busakiller said:
Gear it deeper would work but then I have no top speed. Lol. Plus the deeper you gear it the shorter your gears are. I can brake boost the bike now but it’s doesn’t make much boost on the hit and it takes for every for the bike to make the boost I command it to with the boost controller. By the time I hit redline in my start gear it finally hits target boost.
Click to expand...
Really? keep in mind.. rob loves Boost by speed...... im SURE he set it up for boost by speed.... why dont u set it up to do it by GEAR???? u got the ams2k pro.. i KNOW it can be changed. maybe try boost by gear and give it hell in whatever gear u start in,
 
It has boost by gear but boost by speed is better. Really boost by time is the best way to set up a bike. If you launch at the same speed everytime. Boost by gear is set up by time too
 
busakiller said:
I looked on rcc website to see if they sell the exhaust for the bike. But no luck. I don't like the dumps on the bike. I need to relocate the waste gate closer to the turbo. Since I am sure thats were my boost creep is coming from. Then redo the dumps.

I plan on doing a couple quarter mile passes on the bike and maybe do the standing mile with it. Probably ride it to work and beat up on the locals in my area.....
Click to expand...
I have a full pipe from rcc but I’m running the complete rcc stage 1. Can is off in this pic.

057135A7-3587-4947-99B4-A8548EBF1F16.jpeg
 
A little update. Cylinder has been repaired and cylinder is getting bored out and replated. Hope to have the motor together before spring and get the bike retuned on c16. Still haven’t decided about going intercooled. As it won’t be a street bike so might just do c16 for now. Then next winter do maxx ecu and run methanol for fuel.
 
What happened to the cylinder? I went back and read the past few pages. Got any recent pictures of the bike? Fantastic dragy times. I can only hope to go as fast.
 
You must log in or register to reply here.

Similar threads

S
Gen 1 vs. Gen 2
2 3 4
Replies
78
Views
25,317
Boosted Cycle Perf
Boosted Cycle Perf
B
gen 1 head on a gen 2 busa turbo
Replies
4
Views
2,177
Got-Busa?
Got-Busa?
B
Mr Turbo Stage One Turbo Kit Dyno Numbers
2 3 4
Replies
66
Views
16,100
busakiller
B
P
Stage 1 Gen 1 HP
Replies
18
Views
2,751
Boosted Cycle Perf
Boosted Cycle Perf
V
velocity stage 1 turbo rebuild kit?
2 3
Replies
56
Views
6,379
TurboBusa0704
TurboBusa0704
Back
Top