KZScott
Needs a life
high on speed
Posts: 7235
|
posted November 25, 2008 03:32 AM
boost controll per gear
just wondering how it works? I think it has something to do with a few switching valves like you see on an air shifter. Ive seen a few on turbo bikes. how do they allow (for example) 5psi in first, 7 in second 12 in third ect ect?
just something i was wondering about 
thx
____________
01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
  
|
Shane661
Needs a life
Posts: 11494
|
posted November 25, 2008 03:56 AM
 Edited By: Shane661 on 25 Nov 2008 12:00
We have an MSBC-1 on Racheal's Turbo. Basically, two solenoids and a pressurized gas (we use CO2). In a nutshell, you add or remove override pressure on the wastegate spring.
Some units can use your gear position sensor to determine the gear you are in (best, imo). Hers simply advances the counter every time you hit the air shifter button.
I'm no expert, so someone can certainly add more here...
Shane
|
whitehendrix
Zone Head
fails!
Posts: 757
|
posted November 25, 2008 07:44 PM
that is amazing.
all this hardcore drag racing shit's new to me.. i have alot to learn.
i saw an "auntomatic" trans for the first time ever a few months ago on a turbo-busa powered drag bike. the first 4 gears were done by the controller at a preset rpm..
brilliant.
and now, this.. hmm.
____________
Duct tape is the handyman's secret
weapon. The black is for formal
occasions. - ZRXDean
ill never own a busa unless
someone gives me one.... and then
ill sell it -KZScott
|
dougmeyer
Needs a job
moderated
Posts: 2713
|
posted November 26, 2008 05:53 PM
Work? Absolutely!
Basically you have gear counter that controls a series of solenoids and regulators You need one for each level of boost you want. The counter tells a given solenoid to open allowing air the flow through a particular regulator directing that level of air pressure to the waste gate, either adding to or reducing the spring pressure in the waste gate. This pressure controls the amount of boost going to the inlet.
Good data allows you to set the boost to put down the maximum amount of power the tire will hold, and that the engine can take, in each gear. On a shootout bike for example, you would have the least boost in 1 and 2 so as not to blow the tire away, much more in 3 and 4 where you're hooked up and the air drag is not too great yet. This makes for a lot of acceleration in the middle, making the best of the engine's quick acceleration and the tire's grip. Up on top you may have to back off a bit because the aero drag and taller gear is really loading the engine and overboosting makes for broken parts in the lights. By modulating the boost automatically the rider has to "monitor" and keep it pinned.
This is essentially what happens in a top fuel or funny car except the boost is a constant rising slope (follows RPM)
and the power is added or subtracted at different parts of the run by varying the ign timing, fuel pressure, and clutch grip through the use of air operated valves controlled by solenoids and timers. If the crew chief gets it set right before the run....... Driver just keeps it straight and the throttle nailed.
____________
It's not that I think you're dumb, it's just that so much of what you know isn't true....
|
KZScott
Needs a life
high on speed
Posts: 7235
|
posted November 26, 2008 06:27 PM
someday im going to be able to build this type of stuff....
thx for the info guys, 
____________
01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
|
dubious
Needs a life
Needs more time to ride!
Posts: 8442
|
posted November 28, 2008 05:55 PM
Doug is the professor...
Professor Meyer!
Doug are you running your own business these days?
You aught to be!
____________
natural selection.....
destiny will overcome intervention.
Some are not worthy of the effort.
|
dougmeyer
Needs a job
moderated
Posts: 2713
|
posted November 28, 2008 07:15 PM
Thanks Dubious! No, but I am working on some interesting things....... Who knows what might develop........
____________
It's not that I think you're dumb, it's just that so much of what you know isn't true....
|
KZScott
Needs a life
high on speed
Posts: 7235
|
posted November 28, 2008 08:30 PM
Speaking of boost and Doug, hows the turbo 12 doing? was it put back together?
____________
01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
|
dougmeyer
Needs a job
moderated
Posts: 2713
|
posted November 29, 2008 09:43 AM
I've been side tracked by actual work. It's getting there.
____________
It's not that I think you're dumb, it's just that so much of what you know isn't true....
|
|
|
HOME
NEW TOPIC