Need some feedback on this, Please??

[Apex Man]

How much boost

I am with Kinger, at 10-11 pounds of boost using 3 stacked head gaskets with Ted's torque specs, 26/24 pulleys, Ulmer's clutch setup, MSD booster pump coming in at 5 psi via hobbs switch and a Vortech valve. This setup will get you in trouble right now if you don't mind your right thumb. I know because I have been there when I accidentally mashed the flipper when trying to make a sharp left hand turn and I shot between the trees instantly. Talk about throttle response! I ran this setup for 2000 miles in Quebec with no trouble. Gas milage was decent as long as you stay off the boost. With only occasional burps I got the same or slightly better than a stock ski-doo Mach Z 1000 and a stock AC Crossfire 1000. I for one don't want to use race fuel so 10-11 psi is all I will have.

Good Luck

 

[nate007]

Nate,
Why did you go with mpi? Im trying to deside what one to go with. UP riding, no trail riding. I ride a nytro mtx and thinking about changing the rear end (mpi), under tunnel exhaust?, powerclaw, already put on fox-x's shocks on the front
Thanks, Randy

I'm going to run MPI because Mr. Sled has that kit on his Apex, as well as a few other members who attend the rides. It seems to be the most popular among the people who attend the midwest TY rides. I also have a gift certificate from them so the savings helps to.

 

[rxrider]

Come on Nate and Larry, can't wait to see you guys and your builds over in the TY4stroke Garage forum.

 

[nate007]

For me, one of the main purposes I want the feedback is BECAUSE I want to do a very detailed write ups, exposing the variety of products that could be used in a full-on build, and to help give back to the vendors of the site by doing a consumer oriented build using a variety of vendors. If I wasn't looking to do detailed install threads on this site, I already know what I would want.
I've gotten the permission from my better half to go crazy with it, but I want to do it right, and do what would be realistic and "under control"?
So last call.... If you had to do a supercharged XTX, what goodies would you guys want, and what kinds of things would make for an interesting article?

 

[TurboJamie]

Here is a detailed explaination of the nytro SC kit I can help ya;

Kit is a nice kit and does completely bolt on MPI has updated their website to say no that apex and rx1's do not require holes being drilled in the sled etc... just be sure you know the nytro has a large hole drilled in the CF frame.

The kit bolts on no troubles what so ever, when I purchased my kit I was told what pulleys to run at sea level. Well they were way to much boost and MPI had no solution (winter08) so I had to have my own made if waiting for them winter would be over before the new custom ones would be available.

Next fuel system was unable to support anything beyond 6 psi at sea level after I sorted out the pullies. Left the sled parked until a solution was engineered 2 weeks later in prime riding season I get a regualtor kit that was sure to fix the problem...nope still to lean at WOT.

Parked the sled again...waited for another fix to be engineered and could not lover boost below 6 psi because we could not engineer a pulley to fit.

Finally another 2 weeks passes again in prime riding season, and I get a fuel pump kit, by then it was too late the few passes we had put on the nytro earlier determining (and being R&D for MPI) had caused my sled to be to lean and I lost a piston. That eneded it for me.

Moral of the story make damn well sure they have their stuff togeather if getting a nytro kit. Make sure you get everything to boost fuel pressure if planning to run at sea level and make sure they have pullies that are able to get boost low enough for pump gas at sea level. Never again a first year boost tester.

 

[chadg]

Good stuff nate rizzle. Cant wait to see your decision and cant wait to see some pics. Oh yea and cant wait to TRY to do some carvin with it yeeeeeee haaaaaaaa hold on tight LOL. Talk to ya

chadg

 

[nate007]

So, should I go with a full-tilt, high boost build with all the bells whistles, controllers, add-on goodies, or a simple, lower boost, fool-proof, bare bones system? What would be the most popular build to follow for most interested riders/ potential future customers?

 

[BenderSRX]

This is a tuff answer. For the masses nate i would go for the simple, lower boost, fool-proof, bare bones system. IMO to get more people to follow your post it all boils down to the old mighty dollar and reliability. The cheaper the build is your more than likely to get more guys out there thinking this is what they can do and afford. A sled around 230 to 250 HP is where its at for the trail riders.

 

[apltx08]

So, should I go with a full-tilt, high boost build with all the bells whistles, controllers, add-on goodies, or a simple, lower boost, fool-proof, bare bones system? What would be the most popular build to follow for most interested riders/ potential future customers?

This guy "Gilles Lessard" will answer all of your questions, he's 1 of the best in the BIZ
http://www.gforcedivision.com/index_en.html

 

[kinger]

The more simple fool proof, and bare bones system is what I reccomend. I can afford a $40K sled with 400 hp and everything on it but will NEVER EVER spend that much its just silly to me and I'm a snowmobile NUT.

I like to build my sleds under $10,000 and be turn key for 1000-2000 miles a year without doing anything other then adding gas...

That is just me, I'm puzzled why you want to spend the time and money to get something this site wants vs building what YOU want.

I like garage section and will be posting my new build in there shortly

 

[mattymac]

Id say go with the low budget minded person build also. More practical to more people, but what I say is do all the extra bells and whistles, gauges, clutching, and all the extra add ons to make whatever system work to its full potential. I think its money better spent $ for $.

 

[mulot30th]

fool proof 9-10 psi system 220-230hp is good enough... and reliable.


while 400hp is... not so reliable and more troublesome to get running / tuned correctly

 

[nate007]

I am a gadget guy, and I like all the little bells and whistles. Just seeing who else is the same. Been talking with a few others about doing a build on a Nytro since the site has generally focussed on boosted Apex's and Rx's.
There's alot or R&D on the Nytro systems lately, so I am debating the issue of taking advantage of some of the technology for flexibility of higher performance when I want it.

 

[mulot30th]

I am a gadget guy, and I like all the little bells and whistles. Just seeing who else is the same. Been talking with a few others about doing a build on a Nytro since the site has generally focussed on boosted Apex's and Rx's.
There's alot or R&D on the Nytro systems lately, so I am debating the issue of taking advantage of some of the technology for flexibility of higher performance when I want it.

Question is:

Do you want to ride or be tuning and repairing it?



Because... I do have a 10 psi "rapex" with a blower kit I made by myself and have absolutely no issue with that one, runs on 91 octane pump gaz, can stay on throttle for ever with no issue other than my stupid intercooler getting hot enough that I eventually lose some power (about 60-90 sec WOT)... let it cool down like 30 seconds and power is back.



AND I have higher boost sleds....with all the bells and whistles you can ever imagine..... and yes... there is a lot of power... so much more that my 240hp 10psi sled seems stock in comparison.

BUT this come at a price.... Reliability... is iffy at the very best... no way I would go for a 1000 mile trip using that sled. Good for short (100-150 miles) trips if needed... but not much more.... need maintenance about each 1-2 rides, tuning is an endless story. (never perfectly spot on for all conditions)

And... when you brake something in the engine... is much more expensive than replacing stock yamaha parts....... trust me on that one.