Guys with MTNTK Turbos

sno-addict · Dec 19, 2015

Has anyone messed around more with the MTNTK setup? Different clutching or custom tuning, the race gas kit or anything else to add to this awesome setup? For this season I am going to experiment with some different clutching combos, I am also making a custom exhaust more or less just for fun (hoping I can incorporate a muff pot on it). I also might try the RG kit and the water to air intercooler this year.

rick5150 · Dec 21, 2015

I switched to "race gas tune" (av-gas) this year and changed clutching accordingly will be running 10-12#'s without the intercooler, just need to get out and dial in primary weight...unfortunately an acl surgery back in may and a possible re-scope in a few weeks might keep me out of riding or till late season.
I'll update if and when I can

19 Hundo · Dec 21, 2015

Curious about this as well, I feel the "Stock" Mtntk setup, stock secondary with a almond red spring in the primary and 68 gram weights is holding the sled back.

I changed my clutching to a 48/42/.33 helix, a 150/340 primary and a 140/260 secondary, and the new tune from Shawn. I did all this in one swoop and only got to ride 3 miles before the PTO crank bearing failed.

My opinion with the 3 miles I rode it, was with no boost change I was suddenly hitting 10 pounds, originally set to 7ish, felt very very snappy on the bottom end and the backshift was excellent.

Once I get it back I will obviously get to run it through its paces and if the secondary is too hot I will switch to a 160/ 260 spring and possibly 2 more grams in the primary if the RMP is to high.

I ride from the 8000-10000 foot range.
Anyone else have recommendations please chime in.

sno-addict · Dec 21, 2015

19 Hundo said:
Curious about this as well, I feel the "Stock" Mtntk setup, stock secondary with a almond red spring in the primary and 68 gram weights is holding the sled back.

I changed my clutching to a 48/42/.33 helix, a 150/340 primary and a 140/260 secondary, and the new tune from Shawn. I did all this in one swoop and only got to ride 3 miles before the PTO crank bearing failed.

My opinion with the 3 miles I rode it, was with no boost change I was suddenly hitting 10 pounds, originally set to 7ish, felt very very snappy on the bottom end and the backshift was excellent.

Once I get it back I will obviously get to run it through its paces and if the secondary is too hot I will switch to a 160/ 260 spring and possibly 2 more grams in the primary if the RMP is to high.

I ride from the 8000-10000 foot range.
Anyone else have recommendations please chime in.

On your ride did you still have the 68g's in? Also what is the "new tune"... For the secondary I am starting out with a Straight 48 helix and a 160-240 spring. Then going from there on the primary.

19 Hundo · Dec 21, 2015

I had the 70 gram weights in. The "new" tune is one shawn emailed me it ends in something like 317, according to him it is generations different than the tune that was uploaded when i bought the sled in january of 2015. I think this tune came out around OCT or earlier, a friend has the new tune and it does run better than the old tune for sure. Send him and email and he will email to you, super easy to upload and flash the ecu.

19 Hundo · Dec 21, 2015

And the helix, i was told by other performance companies that they run a straight helix as well, the reason i went with the 48/42/.33 is simply because it was recommended to me by a person that did a lot of clutch testing on his personal mtntk.

Let me know what you think of the straight cut and how your temps are, i was told straight cuts will keep the heat down a little better.

sno-addict · Dec 21, 2015

Did you get a chance to check your rpm's on your short ride 19 hundo?

likkerpig · Dec 22, 2015

Curious to hear more about the tune and whether or not it's for higher boost (10+) or their "baseline" boost @ 7lbs

rick5150 · Dec 22, 2015

likkerpig said:
Curious to hear more about the tune and whether or not it's for higher boost (10+) or their "baseline" boost @ 7lbs

The file ending in 317 is the newest tune and is good for 8-14#s pump to race for the pro ride chassis

19 Hundo · Dec 22, 2015

Im running just pg settings so like rick5150 said it for the pg and lower race gas boost.

On the trail going in which is about 6500-ish I was over revving and on the small 150 foot pull that I did just prior to the motor burning down, half throttle or so maybe a little more a saw I was around 8050 rpm.

sno-addict · Dec 24, 2015

The straight 48 woke the sled up a lot in my eyes, It feels like it pulls harder and way better backshift I left the factory black spring in and it felt like it might be a little hot so Im going to put the 160-240 spring in and go from there. I didn't get a chance to install the "317" tune but will for the next ride.

sno-addict · Jan 7, 2016

I have been ridding a few times since I have installed the new tune and added the heavier spring in the secondary, This sled is AMAZING! Im extremely impressed with it. The only problem I have is every now and then in on/off throttle situations it will fall completely on is face once I let off and get back on then I let of the throttle and hammer back down and its back to normal. Is it the new tune? Is it clutching? Any advice would be great.

likkerpig · Jan 7, 2016

Not sure, wish I could help ya out. Sent an email off to mtntk to get the new calibration files.... Still waiting to hear back...

live2beel · Jan 7, 2016

sno-addict said:
I have been ridding a few times since I have installed the new tune and added the heavier spring in the secondary, This sled is AMAZING! Im extremely impressed with it. The only problem I have is every now and then in on/off throttle situations it will fall completely on is face once I let off and get back on then I let of the throttle and hammer back down and its back to normal. Is it the new tune? Is it clutching? Any advice would be great.

They said they are working on this stumble. Should be ready any day

sno-addict · Jan 7, 2016

Perfect, thanks for the quick responses. I will have to get in touch with Shawn.

Iceman56 · Jan 7, 2016

sno-addict said:
I have been ridding a few times since I have installed the new tune and added the heavier spring in the secondary, This sled is AMAZING! Im extremely impressed with it. The only problem I have is every now and then in on/off throttle situations it will fall completely on is face once I let off and get back on then I let of the throttle and hammer back down and its back to normal. Is it the new tune? Is it clutching? Any advice would be great.

Check for boost leaks and change out your exhaust donut gaskets and exhaust springs

diggity · Jan 11, 2016

Has anyone had problems keeping that that pto rod bearing oiled after pulling the line from that side?

sno-addict · Jan 11, 2016

diggity said:
Has anyone had problems keeping that that pto rod bearing oiled after pulling the line from that side?

I haven't had any problems yet. Have you?

JMCX · Jan 11, 2016

Both rod bearing oilers are rerouted to the turbo.

diggity · Jan 12, 2016

Correct jmcx. my pto rod bearing went. maybe just a bad bearing but Indy dan said 99% sure it was an oiling issue. Motor out and long rod kit in and back up and running. Indy Specialties is top notch! Great service, had him balance my primary too. Fingers crossed leave for out west in a week. Anyone try MDS turbo weights yet?

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