Bike was fly'in Friday

[RacingJake]

Broke into the 6.50 club with a 6.57 and 330fter of 4.21 my best todate. My 60ft was 1.52, can't seem to run quicker than that with the stock clutch and 14/42 gears. I just could'nt let the bike cool down enough to see if I could squeeze more out of it. That tree just kept saying stage, stage, stage to me.

I'm still waiting for my 44 and 46 sprockets, maybe I can drop another tenth or two??? once I get them. Next's on my list is a lockup.

Bike was running great just need to fine tune the air shifter by adding some more air line to increase the kill time by a hair.

See you at the track or hear me in the stands.

 

[KEITH KRAUSE]

Good luck to you!

 

[gsbill]

What psi are you running now? Congratulations! 60's are coming down..

 

[RacingJake]

I'm running 10 psi rear and 40 psi front. What's really cool in when I'm going down the track and I scoot back in the seat I feel the front wheel lifting down the far end of the lane.

 

[gsbill]

Jake,

Why do you want to increase kill time? Are you having probs with your shifts? Longer kill time will add time to your et...The ideal is the shortest kill time needed to make the shift..Lower gear changes need a bit more time than the higher ones...The older Schnitz boxes had adjustable kill times, but the setting was for all shifts...They were talking about being able to have the adjustments different for each shift, so you could really shorten em up for the higher gear changes..I dont know if the current boxes do that. Keep us posted!

 

[lecroy]

Sounds like you have cured the cracked block problem. 6.57 is really moving along when you think about the setup. Was at one of the local tracks last night and saw a street bike run an 8.06(I think) in the finals at 180 something MPH. It would be interesting to see how your 1/4mile times would compare.

The 46 /14, 48/14 is what I run on my old clunker. But it's a lot different setup. Hard to say how it will work for you. The fun part is testing.

"Bike was running great just need to fine tune the air shifter by adding some more air line to increase the kill time by a hair. "

I'll bite. I thought you ran electric over air. What controls the inition kill time? Are you using a Shift Counter? I thought you had just tied the shift button to the MSD 1 and to the air solenoid. So your hold time on the button is the kill time? So, it sounds like you are trying to delay the time from the ignition kill to when the air cylinder moves?
I

 

[RacingJake]

It shifts good but seeing if I can make it better.

I'm using 10" of line between the air shifter and soleniod and I have never tried anything else, so I'm just seeing if I can fine tune it with more line or less line. I use a relay with the electric over air to ground the MC2 to shift so the only way to adjust the kill time besides holding the button down longer is to try different lenghts of air line.

I'm also thinking of tearing the shifter apart and checking the o-ring condition if it has one. Never looked inside one before.

Do you lube the inside part of the air shifter?

 

[lecroy]

Do you lube the inside part of the air shifter?

The line, if large enough inside diameter, should not make any difference. You really want a way to send out a pulse to the kill signal on the MSD. The shift counter from Dyna will do this. If you want to try and make one, I could draw you up a simple schematic that you could build. You want somthing that you can set the kill time from about 0.1 to 0.04 seconds or so. Your finger will never be this good.

I use two brands of air cylinders. Mostly Bimba. They are pressed together and will not come apart. I do check the seals from time to time just by putting pressure on them and seeing how much they leak. I have only had one go bad to where I got rid of it.

If the line is too small and the total length is too long you will run into problems.

 

[gsbill]

Jake, The shorter your lines the better..If I remember correct the rule is 12 inches or less from the solenoid..I would not recommend adding line..What psi are you using in your air shifter? We used 140 psi with great results.

 

[RacingJake]

I run about 125 psi in a 20 oz C02 tank. I'll bring my 10" air line just in case I need it.

UPS dropped off my sprockets today. The 46 is on the bike now with a longer chain. Can't wait until Sat to see how it performs.

I would like to see a 1.4's 60 ft. Et in 6.4's and any mph above 105 in the 1/8. Got my fingers crossed.

So at 10K I hope to be at the mph below.

1st 53mph
2nd 75mph
3rd 96mph
4th 118mph
5th 138mph

 

[lecroy]

We used 140 psi with great results.

I run about 165 PSI, set on every run. I dare say even at this pressure if your using < 0.1 ID line a foot is going to cause trouble. You also need to consider the length of the solenoid to the tank. It will have the same problem. I use 5/16" ID and my total length is about two feet!