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What size Turbo are you running.

Talk to him, I dont know if he's had the pleasure of using one yet..

My opinion from testing on the doo 1000 ... the 3071 is to it what the 2860 is to the 800..

3082 will change your thinking like the 2876 did on the 800...
for all out racing on the 1000 ,, the 3586 gets it..but you have to be strong enough to hold on . or your on ur arssse !:boxing::boxing:

All my 1000cc and larger tricks r for 24 psi and UP...so the little 9 psi 1000 trail sled is not tested here...:face-icon-small-con

Gus
 
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Find out anything

Talked with shain and he said the 3071 works pretty well for high elevation, turbo sea level setups favor the bigger hair dryers, but not up high. He did mention that the 3076 is a good setup but is quite a bit more costly due to much bigger turbo and exhaust takes longer to make, tighter space in machine. The 3076 is $600 more than the 3071. The 76 makes about 10-15 more hp than the 71 at same boost. I'm considering doing the upgrade, if I ever put the 1200 bb in the turbo would be the correct size then. What do you guys think of throwing down the extra $ for the 76?
 
If your thinking about the 1200 kit I would for sure, HeII I would anyway, did he say anything about low end performance.
 
We talked and both had spotty cell coverage at the time, didn't get the chance to talk very long, but I will call again and see, if it improves power through out I will tell him to just up grade it to the 76. To gain another 10-15 hp for $600 now that I think more about it seams definatley worth it if low end is not effected.
 
Would someone donate me a 1000 @ 24lbs and about 5 barrels of 114 mon?


Sent from my iPhone using Tapatalk

I will donate my machine to you once its all done being built for 20k and a case of 16oz Coors Lights.:face-icon-small-ton
 
We talked and both had spotty cell coverage at the time, didn't get the chance to talk very long, but I will call again and see, if it improves power through out I will tell him to just up grade it to the 76. To gain another 10-15 hp for $600 now that I think more about it seams definatley worth it if low end is not effected.

There are three tm1200s in our neck of the woods. All very similar except one has a 3071, one a 3076, one a hybrid 71 with a special compressor wheel and big housing. They all have OVS turbo pipes and intercoolers. The heaviest rider(300lbs) is on the hybrid, next the 71, and the lightest on the 76. At 9500 ft the 71 appears to have the edge over the 76.

The 71 hybrid however has bottom end response from the gods. It jumps every time you twitch the throttle. Very impressive to say the least. It would be cool to take these sleds down in elevation and see how they compare. Unfortunately the sled with the hybrid took a late season tumble and is getting parted out, so no test next year unless the parts stay in the area.

I'm curious on the exhaust diff between the 76 and the 71? I thought they had the same turbine housing and connection?
 
No I can NOT
Christopher has LOCKED IT>>
send email

gus.bohne@comcast.net

as u climb in altitude you you need a larger compressor to move what little air you have.. I enjoy reading the differing opinions for sure,You can NOT MAKE AIRFLOW APPEAR from no where...

Let me have a day of tuning your 71's vs a 76 or 82 and you will change your way of thinking...

NOT 1 person racing or play riding a 1000 cat at sealevel would even waste the time to bring a 3071.they are flat out DOGS.. the 76 is ok for a novice, the other 30 sleds all have 82's..
wonder where these magic turbos are??




Have fun gents...


gus
 
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Why is it locked,
If I had a m1000 I would be riding it at 7-11000ft and prob never over 12lbs of boost (3071 rated boost) more like 8-10lbs and would use it for tight tree riding mostly, the on off throttle is more important than big hp. I would rarely hit full track speed on 8lbs before changing my line, so what turbo would be best for this, at what point is it to big and start to loose response,


As far as I can tell OVS is changing the cold side of the 71 so what would happen if you used a 76 with the hybrid cold side???
 
--The OVS 3071 Hybrid mentioned above may have had the Tial external wastegate which probably gave it the exceptional throttle response. Assuming the others did not have Tial wastegates, they may have greatly benefitted from having them installed.


--The 2876 cold side is already bigger than the a 2871 Hybrid cold side. Both are 70 a/r but the 2876 is a little larger due to ratio. I am not sure there is a 2876 Hybrid housing available.
 
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Clutching is a huge part of how these work, for these DD secondary's I have had big problems with the secondary wearing down the shaft and bushings and causing a bind, for $80 you can get it rebuilt and I would prob do it every year.
 
--The OVS 3071 Hybrid mentioned above may have had the Tial external wastegate which probably gave it the exceptional throttle response. Assuming the others did not have Tial wastegates, they may have greatly benefitted from having.

They are all tial setups. I am not sure if they use similar clutching components. I think the hybrid has a hta compressor wheel with the big .70 housing.

Hey Gus, you might be on to something......... "A day with Gus" seminar.

Kinda like a day with Rassmussen or Burant.
 
Just want to be clear, people are throwing around numbers that arent exactly making sense,
When talking about the 1000 its a 30 series, so what is the difference between the 3071, 3071 hybrid, 3076, 3082,

When talking 800 its the 28's, 2871, 2871 hybrid, 2876
But there are multiple 2871's and mine can not be converted to the hybrid but could be converted to a 2876.
 
Turbo PN CHRA PN Bearing Cooling Ind. Whl Dia Exd Whl Dia Trim A/R Whl Dia Trim A/R Type HP Displacement
GT2871R 743347-1 443179-31 Ball Oil & Water 49.2mm 71.0mm 48 0.60 53.9mm 76 0.86 Wastegated 250 - 400 1.8L - 3.0L
GT2871R 743347-2 446179-32 Ball Oil & Water 53.1mm 71.0mm 56 0.60 53.9mm 76 0.86 Wastegated 280 - 475 1.8L - 3.0L
GT2876R 705330-2 446179-18 Ball Oil & Water 52.8mm 76.1mm 48 0.70 53.9mm 76 0.86 Wastegated 280 - 480 1.8L - 3.0L

So far what I have gathered from the hybrid cold side _____mm 71.0mm 56 0.70
but its a 3 inch inlet???

This is the two options of 2871's and the 76 with .86 ar
can you list the numbers in the same order on the hybrid.

Does anyone have the numbers in this order for the 3071, 3076 and the 3071 hybrid if there is one. I think this is right for the 3071 but not sure
GT3071R 700382-3 700177-3 Ball Oil & Water 53.1mm 71.0mm 56 0.50 56.5mm 84 0.64 Wastegated 280 - 480 1.8L - 3.0L

Not that I really care about the hybrid just trying to get a grasp on what the hybrid is all about.
 
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