supercharger on an trail sled???

[millstreet]

Nate-I'm at 10-12 psi-that's more than you'll ever need for the trails. The only time your throttle will see the bar is on the lake. As for trail riding, the boost is instant and addictive, it's an exercise in thumb modulation.
Go for it-if you can keep it on pump gas, it will be alot more practical for the trails-just make sure you have good fuel! I'm using Sunoco 104 unleaded.

 

[power valve]

what kind of speed with mpi sc stage 1 on 2000ft hard packed snow with an attack. do you think you would see high 120's or 130mph

 

[promod63]

what kind of speed with mpi sc stage 1 on 2000ft hard packed snow with an attack. do you think you would see high 120's or 130mph

Don't know about the MPI but our supercharged Apex Mountain will do a buck eight in way less than 2000 ft (on the dream meter) with stock gearing and a 162X16 track at 15#'s boost 6000 ft in the air so your Attack should be a lot faster than that.

 

[HAMMER]

 

[promod63]

Dynotech verified MPIs claim of 240hp. In my opinion it is more than you need and more than most people should have in trail conditions.

This might be true except for those of us that don't want to have our azz handed to us by a turbo sled at 15 or 20 lbs. You don't have to use all of the throttle all of the time. (Guns don't kill, People do.) The MPI stage 1 blower is maxed out at 10#'s. It's out of its adiabatic efficiency at this point and doing nothing but making more intake manifold heat.

Can anyone confirm the MPI tech's claim that a BOV can not or should not be used with the MPI compressor?

This just kills me. What were they thinking? You (Hammer) and Ted Jannetty seem to be the only ones who have figured this out. On a blow through system where is the boost going to go when you dump off the throttle? Think about it. Belts are going to suffer, and fuel mileage is going to go in the toilet. Just my opinion I have only been building supercharged engines for about 28 years now. So take it for what it's worth.

Bill

 

[HAMMER]

This might be true except for those of us that don't want to have our azz handed to us by a turbo sled at 15 or 20 lbs.

If someone with 50-100hp more horsepower drives by me it doesn't bother me at all. Because they should. I'm more interested in competitive tuning skill and rider skill. So if someone with an equivalent weight to horsepower sled and equivalent rider skill hands me my azz.

........That is upsetting.

 

[SPEED]

In my opinion the BOV is a necessity on theseS/C motors I have ridden with and without one.
In my opinion 240hp is enough for most on the trail ( for some more is better)
Now as far as getting my azz handed to me in a race All of you experienced guy's know A sled with 240hp with a chassis set-up and clutched spot on will almost always whoop the hell out of the bigger hp bolt ons. So bigger is not always better

 

[Srxspec]

You can easily run the setup at 5 lbs (22 tooth on crank and 26 tooth on engine) of boost on 91 octane (195 hp) or you can bump up and run 7 lbs (24 tooh on each) of boost on 91-93 octane fuel but you must make sure it's always good fuel. Here is what I would recommend ordering for the complete kit with pricing.

Supercharger: $4795
Spare Supercharger Belt: $35
Spare Supercharger Oil: $100
Digital Water Temp Gauge: $125 (Daytona Digital Gauge)
Wideband Oxygen Sensor: $400 (Innovate Motorsports XD-16)
BPE Gauge Pod/Hood Scoop/Inspection Plate: $285
Vortech Blow-Off Valve: $248
Low Boost Clutch Kit: $365

I would also recommend extrovert drivers and a fully punched/clipped track.

 

[nate007]

I can say with relative certainty that if I put a s/c on my sled, there is probably no one within 100 miles of me that would have a sled that will touch it.
I'm not exactly sure why I even want to do this, but I have sold all of my other toys within the last few years, and this is about all I have focussed my attention to! I am not looking to make my sled run 130mph, but i want to have a sled that will out run anybody else out of the hole. 95% of the mile I ride are here in Eastern Iowa, and short of one trip per year to Northern Wisconsin, I am riding the ditch trails. We do have one lake on our trail system, but typically it is the last to freeze over and doesn't stay frozen for the entire season. I am not a top speed junkie, but a short sprint junkie. That being said also, I have ridden almost every day the trails have been rideable here, and have yet to see another Apex. I do know of a few, but haven't seen them. Doo's are my primary target here, and I ride with a good friend of mine that has a 1000 'Gade.
So that leaves me with the question of weather or not it's even worth the money. I am just worried that it would have too much power to be on and off the throttle all the time. I also don't wan't to have to spend an entire season trying to get the bugs worked out, only to enjoy it the following season! If I did this, i'm sure I would be here asking you guys a ton of ?'s while putting it together. I'm definately mechanically incluned enough for it, just that it's a new thing.
Anybody have a good used system for sale?
Nate

 

[Srxspec]

Used kit:
http://www.snowest.com/fusetalk/messageview.cfm?catid=94&threadid=299877&enterthread=y

 

[SPEED]

Nate
What Allen is recommending above would surely satisfy you as far as power, Based on what your looking to do I would suggest you get a reliable shop to do the install and tune it to your needs. The S/C is a reliable trail rider as are the turbo's( most who have them will testify to that)
There are some used kit's for sale if you want to spend the time.My two cent's Buy new ,have it installed go enjoy

 

[nate007]

I'm not the kind of guy that would have a shop do it. I have to know everything i can about it, and am perfectly capable of doing anything myself. I have mills and lathes, and just about every tool known to man, so if I farmed it out, I would probably kill myself! As long as I have some sort of a reference manual or even set-up instructions, I'd be just fine. I would have to be well versed in how to do all the tuning and adjusting myself, so i wouldn't have to rely on a shop to make the adjustments. Plus, I'm not aware of any shops around here that do this stuff.
I have also been speaking with "dynoray" about doing some motor mods, so maybe I'll do a combination of the two to get a mild supercharger setup, with a mildly modded motor, to hopefully yield the same as a more agressive supercharger. I definately don't want to have to worry about finding the right fuel, but if it would work to keep even a bottle of octane boost or something, I'd be okay with that.
I already have a good clutch kit, and aftermarket exhaust, so from here out, I guess it's time to ante up!$$$$$$$$$$$$$$
Nate

 

[supercat]

I am curious with the bov installed you guys mentioned better mileage (amongst other advatages) if you are at partial throttle low load. What kind of range can you get from a tank if you are running 5 pounds, with a bov installed at moderate load? I know mileage is not something you usually worry about with horsepower mods, but I occasionally ride 100 to 120 miles between stops in the UP of MI. If I coaxed it along could I make it?

 

[kinger]

I can say with relative certainty that if I put a s/c on my sled, there is probably no one within 100 miles of me that would have a sled that will touch it.
Nate

I'm in mason city clear lake, IA area I'll take that bet

 

[SPEED]

Supercat , I am running 9lbs. boost (at the motor) trail rode 70 miles on Saturday groomed trails , raced on the lake (about dozen 1000 ft pass') and had fuel to spare.