| Author |
Message |
    
Reepicheep
| | Posted on Sunday, January 04, 2009 - 05:56 pm: | 
|
Thanks for the real world data Eric..
I've been thinking about this, the front and rear jug are (AFAIK) run pretty much as two different motors in terms of fueling, etc.
What about just using the front jug exhaust only to drive a turbocharger that feeds a pressurized (shared) airbox.
It would limit the amount of boost available, but should dramatically simplify plumbing... particularly if you have an older XB with the frame air snorkel. |
Ericz
| | Posted on Sunday, January 04, 2009 - 10:45 pm: |
|
It's an interesting idea- running a turbo off of the exhaust from one cylinder, but I think that the difference in exhaust flow between the turbo-restricted front cylinder and the free-flowing rear cylinder would cause too many inconsistencies in overall performance and tuning. Also, it would be difficult to size a turbo with a turbine wheel small enough to be driven from one cylinder that would provide enough energy to spin a large enough compressor wheel that can supply both cylinders with airflow. |
Bombardier
| | Posted on Monday, January 05, 2009 - 06:22 am: |
|
What about just using the front jug exhaust only to drive a turbocharger that feeds a pressurized (shared) airbox.
It would limit the amount of boost available, but should dramatically simplify plumbing... particularly if you have an older XB with the frame air snorkel.
Why would the plumbing be any simpler Reep?
Doesn't the XB have a scavenge system which would seem ideal for turbo applications?
Are you thinking of mounting the turbo on the right side off the front exhaust header? |
Diablobrian
| | Posted on Wednesday, January 14, 2009 - 01:13 pm: |
|
The biggest problem I see with conventional turbos on motorcycles comes from turbo lag.
You do not want to have the boost come on mid-turn as you roll back on the throttle.
variable vane turbos help with this problem, and air to air intercoolers can handle
the heat generated. IIRC there was even a factory built turbo 03 or 04 (with the frame
pass-through) test mule that got destroyed without the public catching sight of it.
Prior the the variable vane turbos I always championed superchargers for bikes due to
the linear nature of the power delivery.
A stock XB should respond well to a little bit of boost, but of course if you wanted to build a
high boost motor you would want to build a motor specifically for that purpose with cams
ground for use with a turbo, lower compression etc....but thats another discussion. |
No_rice
| | Posted on Wednesday, January 14, 2009 - 02:00 pm: |
|
The biggest problem I see with conventional turbos on motorcycles comes from turbo lag.
You do not want to have the boost come on mid-turn as you roll back on the throttle.
variable vane turbos help with this problem, and air to air intercoolers can handle
the heat generated. IIRC there was even a factory built turbo 03 or 04 (with the frame
pass-through) test mule that got destroyed without the public catching sight of it.
Prior the the variable vane turbos I always championed superchargers for bikes due to
the linear nature of the power delivery.
A stock XB should respond well to a little bit of boost, but of course if you wanted to build a
high boost motor you would want to build a motor specifically for that purpose with cams
ground for use with a turbo, lower compression etc....but thats another discussion.
the biggest thing i see is that your still alive! hey stranger! |
No_rice
| | Posted on Wednesday, January 14, 2009 - 02:06 pm: |
|
A badweb associate ruined his otherwise stock XB engine by adding nitrous.
hmm, all i know is it wasnt me, and mines been on there since what 04 or 05? i cant remember anymore. its been awhile anyway. |
Firebolteric_ma
| | Posted on Wednesday, January 14, 2009 - 03:26 pm: |
|
A badweb associate ruined his otherwise stock XB engine by adding nitrous.
It is NOT ruined... Just needs a little love thrown at it.....
 |
Ducxl
| | Posted on Wednesday, January 14, 2009 - 05:00 pm: |
|
Saaayyy!! That WAS YOU wasn't it!!
Would you call it a complete success?
How did the bike run?
Would you recommend it to others without ANY other mods to strengthen the rest of the assembly?
I made the comment because i hear about airbox mods muffler mods. supercharging and nitrous.
But i NEVER hear of internal mods to prepare for(in some cases)doubling the horsepower.
I've been taught to treat the engine mods as a package.Not just piecemeal.
What do you think? Am i wrong? And why? |
Reepicheep
| | Posted on Friday, January 16, 2009 - 01:19 pm: |
|
I don't think the turbo on my 2001 Saab 9-3 is variable vane or anything fancy, just a garrett turbo.
I was expecting to be annoyed by the turbo lag, and haven't been in the least. In the first two gears, the car will just spin the tires with or without boost. In the other gears, whacking the throttle just feels like a nice linear power climb, it just climbs faster as the boost comes on further.
If anything, it feels like a revvier engine (which has the same kind of "stacked all at the high RPM end power feel). |
B00stzx3
| | Posted on Friday, January 16, 2009 - 03:31 pm: |
|
Isn't Aerocharger popular for HD boost? I for one would pay 2-3k to put my Bolt up there with the 1125R's numbers, hell the 1098s numbers would be even better. I'd rather keep the Bolt then spend a bunch more to get a 1125R. Since I dont know much tho Imma shut up bout that. |
|
