Who's doing a Carl's Cycle 900BB?

[Scott]

I've been around a Pro bb 900ish this past year...I am pretty sure I could smell something different than straight pump gas.

I have heard the old 910 big blocks to be about 200hp, but the newere ones on the Pros aren't getting those same numbers.

I dunno Jesse. I'd like to see them all dyno'd on the same day together.

I know that Jack's 900 runs HARD. I pulled a good running PSI 995 in a GenII chassis.

 

[assault11]

I'm doing Carl's 900 on mine now. I will let you know how it runs. It will run you about 6000$ for a complete set up

 

[assault11]

My Carl's 900 ran AWESOME all last year. Waiting for it to snow again !!!
Typical Carl's stuff...Gas, oil and ride. No wrenching or tuning!
Great Boondockin' set-up. Instant throttle response and power.

How many miles did you put on it?

 

[Scott]

I'm doing Carl's 900 on mine now. I will let you know how it runs. It will run you about 6000$ for a complete set up

I'd be curious to hear your opinion and see pictures of the exhaust system. I remember the one I rode at Cascade in June was VERY QUIET!!! Almost like stock.

 

[assault11]

I'd be curious to hear your opinion and see pictures of the exhaust system. I remember the one I rode at Cascade in June was VERY QUIET!!! Almost like stock.

I have a thread in the build forum. I will be posting pictures of everything this weekend hopefully. The exhaust is an slp system.

 

[AgentRmk]

My 900 runs pump premium - NO race fuel.
SLP single pipe - stock sounding sled. Surprised a few people.
I will have to look at the miles, but had 4 trips out west.
Ran flawless, change weights for altitude and ride.

 

[dmaxd2500]

I havn't seen alot of info on Carl's 900 but here's a link detailing Brad's 910, some good info.

http://www.snowestonline.com/forum/showthread.php?t=311852&highlight=910

 

[Super B]

My 900 runs pump premium - NO race fuel.
SLP single pipe - stock sounding sled. Surprised a few people.
I will have to look at the miles, but had 4 trips out west.
Ran flawless, change weights for altitude and ride.

Have you ran this set up at low altitude at all??

 

[Scott]

I have a thread in the build forum. I will be posting pictures of everything this weekend hopefully. The exhaust is an slp system.

If you don't mind linking that thread here so others can follow it also.
Thanks.

 

[Scott]

My 900 runs pump premium - NO race fuel.
SLP single pipe - stock sounding sled. Surprised a few people.
I will have to look at the miles, but had 4 trips out west.
Ran flawless, change weights for altitude and ride.

Yeah, at what altitude on straight pump gas?
What domes?

I wonder if people will run tighter domes, say 14:1 at 4000-9000 feet.

 

[assault11]

Yeah, at what altitude on straight pump gas?
What domes?

I wonder if people will run tighter domes, say 14:1 at 4000-9000 feet.

Anything under 5000 feet you need to run some race fuel. They use about a 13.2 head

 

[assault11]

If you don't mind linking that thread here so others can follow it also.
Thanks.

http://www.snowestonline.com/forum/showthread.php?t=315493 pictures will come ASAP

 

[assault11]

Not sure if it means anything to you guys but burandt was on one last season (it's the orange sled you see in the movies) and skinner, burandts helper will be on one this year

 

[Ckale]

Yep Sahen Skinner is running one this year.

Im already saving up!!!

 

[800xtreme]

Yep...I was told by someone who rode a few times with Burandt last year that Burandt preferred his 900BB most of the time. I would imagine on DEEEEEP days and long pulls he would want the Turbo. Just what I was told....

 

[flatfoot]

Maybe I've missed something somewhere, but isn't the biggest advantage of a turbo to maintain hp at elevation? If you take a naturally aspirated engine that is at 180hp to 10,000' isn't the hp output now approximately 126? Whereas a turbo forces the intake charge to overcome elevation challenges and a turbo'd engine doing 180 hp at sea level is still 180 at 10,000'

 

[POLZIN]

No you didnt miss anything thats pretty accurate.elevation and riding style would determine your preference. For me 6000 seems like alot for a BB vs the turbo. But all my riding is above 8500' most is 10-12,500' maybe it would be different if I rode lower elevaion.

 

[steepndeep800]

Maybe I've missed something somewhere, but isn't the biggest advantage of a turbo to maintain hp at elevation? If you take a naturally aspirated engine that is at 180hp to 10,000' isn't the hp output now approximately 126? Whereas a turbo forces the intake charge to overcome elevation challenges and a turbo'd engine doing 180 hp at sea level is still 180 at 10,000'

You are mostly correct. N/A motors loose approx. 3% pr 1000 ft of elevation.
Turbo motors loose approx .75 to 1% pr 1000 ft of elevation at the same boost levels. You would need to turn boost up to gain back that HP but if your topped out on your boost you can not do that.

That said stock turbo motor is making stock HP and torque off boost so on and off the throttle you are getting that lag of stock motor going from 60 hp (mid range at 10000ft elevation) and wicking up progressivly (1-2 second delay) to 180 hp not instantly.
BB now will have added power in the mid and instantly have the power gained by engine mods up top.
My .02 each one has a place hard to compare one to the other
BB much funner, quicker and easier in the tight terrain
Turbos great for wide open longer climbs

 

[800xtreme]

I have to say that the 3% loss of power for every 1000ft in elevation just doesn't "feel" right from my experience. I used to ride in AK for 20+ years, which is basically sealevel - 3000ft. I had mod 800's (ported, head, twin pipes, reeds, cltuched, bored carbs, etc) and they did run hard in that good air.

I now ride a stage 4 Pro in CO which is about as high as you can ride from an elevation stand point. Yes, the chasis is light years better than the old Gen II, BUT it certainly does not "feel" like a sled that has 30% less power. That is a HUGE difference. If I really only have 126hp at my elevation then I have gotten pretty soft in my old age because it doesn't feel like it.

Not arguing, just saying what my seat of pants experience has been.

 

[meathooker]

Turbo motors loose approx .75 to 1% pr 1000 ft of elevation at the same boost levels. You would need to turn boost up to gain back that HP but if your topped out on your boost you can not do that.

If you get out of the efficiency range of the turbo you are correct. For an 800cc 2 stroke I would think you are nowhere near the limit of even a smaller turbo such as a 2860. I haven't looked at the compressor maps in some time though so maybe someone else will chime in.