thinking about upgrading my old aerocharger setup on my m8 to one of those new comp oil-less turbo kits that attitude industries is doing. does anyone know much about these or have any experience with how derecks turbo setups perform? really need some advice before i pull the trigger on this
new comp turbo?
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b1dodge
Well-known member
Here is a link. Madmax on our green LE with a 2860 ish garret knock off at 7-8 pounds. The black "rental" sled is me with a comp oil-less turbo also 7-8 pounds. The green sled is by far quicker on and off throttle but the comp just makes more power at the same boost level. The down side is it is a bit lazy down low. Derrick is getting us something smaller exhaust AR and different trim to help that out. The comp turbos are very trick and the absolute best quality but you do pay for it $$$$. Difference in the 2 sleds... 153 le 162 on the rental both stock pc tracks . Me on the rental 225 lb madmax on the le 195-200 ish. Both sleds running 8600-8700 rpm. Yes we run that many rpm and it works. This is NOT Derricks turbo kit it was built by Madmax and Myself Derrick supplied us with 2 Comp Turbos and tested with us to build mapping.
http://www.youtube.com/user/b1dodge#p/a/u/0/AoYr8VLPw70
http://www.youtube.com/user/b1dodge#p/a/u/0/AoYr8VLPw70
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A sincere question.... So don't flame me.
What, in your opinion, makes the Comp Oilless turbo an "upgrade" from an Aerocharger 66 turbo?
How much actual running time do the Comp Turbos have in the hands of consumers on snowmobiles?(not Automotive or other non-snowmobile apps)
How many are in the hands of consumers out there? (not testing sleds by a kit mfg).
I hear that Silber is putting them in the their consumer kits for the first time this year on the PRO RMK and that Boondocker had run them in their test M's this past fall. Both companies had considerable run time on them in their prototype test sleds.
I'm sure that the kit makers that are using them are confident in them and have tested them or they would not have been releasing them to the public for the first time this year...Which is why I'm curious how many have already been installed and run with some significant miles on the average Joe's sled that does not work for or sponsored by the mfg.
The Comp Turbo units are more costly than a Garrett, .... but then you do not have to pay for the support equipment like oil tanks, oil lines, oil pumps etc. So the cost of a new kit would probably be a wash with the Comp. or even less without all of the extra fab-work costs involved.
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What, in your opinion, makes the Comp Oilless turbo an "upgrade" from an Aerocharger 66 turbo?
How much actual running time do the Comp Turbos have in the hands of consumers on snowmobiles?(not Automotive or other non-snowmobile apps)
How many are in the hands of consumers out there? (not testing sleds by a kit mfg).
I hear that Silber is putting them in the their consumer kits for the first time this year on the PRO RMK and that Boondocker had run them in their test M's this past fall. Both companies had considerable run time on them in their prototype test sleds.
I'm sure that the kit makers that are using them are confident in them and have tested them or they would not have been releasing them to the public for the first time this year...Which is why I'm curious how many have already been installed and run with some significant miles on the average Joe's sled that does not work for or sponsored by the mfg.
The Comp Turbo units are more costly than a Garrett, .... but then you do not have to pay for the support equipment like oil tanks, oil lines, oil pumps etc. So the cost of a new kit would probably be a wash with the Comp. or even less without all of the extra fab-work costs involved.
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comp turbo
i am only running an aero 53 so it would def be an upgrade. i can trade my aero kit in and get the comp turbo installed and ready to rock and pay $1200 diff doesn't seem that bad when the comp turbo is $1700 alone. just not sure if i wanna do it thanks for the input
i am only running an aero 53 so it would def be an upgrade. i can trade my aero kit in and get the comp turbo installed and ready to rock and pay $1200 diff doesn't seem that bad when the comp turbo is $1700 alone. just not sure if i wanna do it thanks for the input
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b1dodge
Well-known member
Im not sure about everyone else but I believe there to be about 600 miles on the comp turbo on that "rental" sled. As I said it is NOT perfect. I believe there needs to be an AR/trim diameter change on the exhaust. Our kits are not sold to the public (yet) we are simply enthusiasts that like to try different things and see how and if they will work. As far as the oil-less turbos we have they have stainless housings, aluminum center sections, ceramic bearings,and billet impeller. When I removed the turbo from the sled on wed. to install on my 2012, the turbo was as tight as the day it was new... As far as how they hold up long term? So far so good. We also have a sled with over 3k miles on a Chinese turbo
Im not sure if the Comp is an "upgrade " for the Aero but it does have the same appeal because of kit simplicity as you stated. Its a wait and see type thing I suppose but this season should tell the tale.
the other nice thing about the comp turbo is that you can buy any piece you want to rebuild it. With a garrett you have to buy the complete center section if you just need a bearing. The comps are very nice turbos, you can buy them oil less or oil and water cooled (less $$ than a similar garrett). Bikeman perf has been testing a lot of comp turbos for thier kits as well. The other cool newer sled turbo to look at is the Borg Warner turbos, built in BOV in the comp housing
madmaxx.... Thanks for the input... sounds like you have some experience with them...
How does a layperson re balance the rotating assembly after you take it apart?
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How does a layperson re balance the rotating assembly after you take it apart?
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these look really cool. I hope they work out for the 2 smokers, I hate having an oil reserviour that makes a mess of my sled.
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b1dodge
Well-known member
We have not had to replace anything yet but its my understanding both wheels are neutral balanced after manufacturing. From what I have seen of rotating parts built on a CNC the balance is simply a secondary Quality Control measure. These machines are VERY good.
I ran the oil less turbo all last year and it worked flawlessly and the guys at comp turbo were really good to work with they set the turbos up exactly how i wanted them and i get them for a good price
so which one of their turbos compares to a garret 2871 with a 56 trim / .64 a/r compressor and a 76 trim .86 a/r turbine like the ones that are on the majority of the sleds around ? or even moreso which one of there turbos would compare with a 2876?
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rmsha146
Member
they dont have a specific they have been building them up for me with a billet wheel they have one that is similar but it is .64 turbine housing instead of the .86 i have been having them built a little different and they work awesome call down to comp turbo and ask them what they have for what your looking for they are really easy to work with or i can check the ones on the sleds i have at my shop tomorrow and let you know what i have for sure, iam trying the borgwarner efr on one of my pro kits this year though seem like it should be the ticket
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rmsha, let us know how the efr does, have been very interested in them, just not sure if we wanted to bite this bullet and drop that kinda $$ on one as it doesnt seem like you can get quite the large compressor on those ones.
Has anyone ordered any of the comp turbos. Was going to but had a look at the two sent out west here and the exhaust housing and waste gate flapper dont line up UNUSABLE piss poor quality and has been over a month that Justin has been stalling on making it right and no end in site.
Got mine back from comp. Waist gate flapper had to be realigned. Turbo is on now.just waiting for a little more snow so I can go tune.
4 injector. Attitude controller. Turbo through Derik
tried it out once. Boost comes on like an ignorant b.;+(h
4 injector. Attitude controller. Turbo through Derik
tried it out once. Boost comes on like an ignorant b.;+(h
