MapX stage 2 tune

Thought I’d share my experience with Maptun MapX 215hp stage 2 tune for my 2024 Lynx Shredder RE 850 Turbo R. Prior to tuning, the sled had roughly 450 miles. I added the suggested Jaws Performance pipe & Y-Pipe, emptied the fuel tank and mixed 40% 100LL w/90 pump gas (best you can get in AK). Using

 

[Dbook]

Ouch! That's gonna leave a mark. How far did you make it on it?

 

[Aksledguy]

Ouch! That's gonna leave a mark. How far did you make it on it?

Maybe 50-60 miles. No check engine lights. The engine cooled down and freed up. It started back up, as far as the ECM was concerned. Everything was fine lol. Flashed it back to stock and two codes popped up. Boost pressure out of range and ecm communication fault.

 

[RFleck17105]

It’s not an AV gas tune! You should have run the 90 with an octane booster. The 93/98 fuel recommendation is 93 octane for North America and the 98 refers to what the Scandinavian countries commonly see for their countries octane. A simple email to Maptun probably would have prevented that meltdown.

 

[Aksledguy]

It’s not an AV gas tune! You should have run the 90 with an octane booster. The 93/98 fuel recommendation is 93 octane for North America and the 98 refers to what the Scandinavian countries commonly see for their countries octane. A simple email to Maptun probably would have prevented that meltdown.

They specifically said to run 100LL mixed with pump gas. They caused the failure. I dont much care. The post is about making other sledders aware before they spend the money on tunes that will eventually waste their engine prematurely.

 

[Aksledguy]

It’s not an AV gas tune! You should have run the 90 with an octane booster. The 93/98 fuel recommendation is 93 octane for North America and the 98 refers to what the Scandinavian countries commonly see for their countries octane. A simple email to Maptun probably would have prevented that meltdown.

They told me AVGas. It was on their website. In fact. Once the tune was downloaded, hovering over tune with the laptop mouse prior to flashing on it said 100LL specifically. Also the fact the engine seized and not a single DTC code to be seen on HUD.

 

[Aksledguy]

They told me AVGas. It was on their website. In fact. Once the tune was downloaded, hovering over tune with the laptop mouse prior to flashing on it said 100LL specifically. Also the fact the engine seized and not a single DTC code to be seen on HUD.

Spend your money as you wish. This post isn’t to try and recover cost from Maptun. It has cost $7k to get my sled back into the same position it was in prior to their tune. I’ve learned my lesson. Just spreading the word to whoever seeks reviews on certain products.

 

[Aksledguy]

Spend your money as you wish. This post isn’t to try and recover cost from Maptun. It has cost $7k to get my sled back into the same position it was in prior to their tune. I’ve learned my lesson. Just spreading the word to whoever seeks reviews on certain products.

The other piston to whom it concerns

 

[Aksledguy]

The other piston to whom it concernsView attachment 430270

Injector failure. I’m not exactly sure what happened here. Either the mag side injector flat out quit(picture shown) or the PTO piston injector stopped contributing the fuel it needed to and inevitably had a lean burn resulting in piston meltdown and failure.

 

[Aksledguy]

It’s not an AV gas tune! You should have run the 90 with an octane booster. The 93/98 fuel recommendation is 93 octane for North America and the 98 refers to what the Scandinavian countries commonly see for their countries octane. A simple email to Maptun probably would have prevented that meltdown.

Buy the tune then. Flash it to your sled.
I did reach out to them. They told me 100LL + pump gas should be good. Running 40% 100LL. I’m not the first guy that had similar burn down with the same recommendations from Maptun.

 

[AKlowmarker]

It’s not an AV gas tune! You should have run the 90 with an octane booster. The 93/98 fuel recommendation is 93 octane for North America and the 98 refers to what the Scandinavian countries commonly see for their countries octane. A simple email to Maptun probably would have prevented that meltdown.

You do realize that av gas is a minimum 100 octane don't you? Much better quality than any octane booster on the market. Av gas is standard operating procedure on anything modified in Alaska. I have used it on all kinds of modified 2 strokes requiring 93 octane and never once had an issue. It's always higher quality than race gas (I refuse to buy Vp after getting contaminated 110 fuel from them)

Standard mixture ratio would estimate his octane at 94 octane.

 

[RFleck17105]

You do realize that av gas is a minimum 100 octane don't you? Much better quality than any octane booster on the market. Av gas is standard operating procedure on anything modified in Alaska. I have used it on all kinds of modified 2 strokes requiring 93 octane and never once had an issue. It's always higher quality than race gas (I refuse to buy Vp after getting contaminated 110 fuel from them)

Standard mixture ratio would estimate his octane at 94 octane.

I know what AV fuel is and what it is used for. I’ve used it in a couple turbos and big bores. Maptun is not a AV gas tune. 98 octane to them is our standard 93 octane hence the 93/98 recommendation. I have a buddy that just threw a rod through the case with the Jaws pipe and HRSS tune at sea level. That pipe is junk. High hp numbers from a dyno shop in NY that has no clue how to run a dyno. Dyno surge is not gained hp!

 

[kfaz123]

running av gas was not the reason the sled melted a piston being that its one piston only that went lean causing severe detonation on that cylinder. at least that`s what it looks like from the photos. i would be looking for a failed injector or a rubbed though harness causing the injector not to fire on that cyl causing lean detonation. unless there is a design flaw with the pipe or the pipe just requires that much more octane as its detonation prone compared to the oem pipe. but i have a hard time seeing a single pipe that is detonation prone not effecting both cyls. i`ve been running maptun on my 2023 expert for 3 years now first 2 years i ran their stage 1 198hp tune and this year i have been running the new stage 1 205hp tune sled has always run flawless like stock and i always run 94 octane with 25% av gas. more octane than necessary for these tunes but i always like to have a little extra for insurance in case a abnormal situation occurs. gives you a little extra protection. you cant state that av gas killed the sled but octane booster wouldn`t have all you doing with adding av gas to the fuel is boosting the octane by mixing a higher octane leaded fuel with a lower octane fuel. i ran a 2015 xm t3 impluse turbo on 50/50 av gas and 94 for 7 years and have 8500kms on that original motor that came with the sled 7500kms of that were boosted av gas didn`t cause that sled to fail. we run it in multiple sleds i have tuned multiple turbo cars with av gas as a octane booster. it has a stoich of 14.7 just like pump gas unless your running 10% ethanol pump which would be 14.1 stoich and if this is the case mixing av gas in would actually make the sled run slightly richer not leaner than it would on straight e10 pump. i cant speak for the jaws pipe or the stage 2 tune as i havent run it and dont know anyone that is running it personally. but i would be looking for a electrical or mechanical failure that caused that cyl to lean out before i would put that new motor into operation as you dont want a re occuring melt down as you know its not a cheap engine to replace

 

[underpressure]

Here is the problem with a can tune, I'm sure the tune was a good tune on the machine it was tested on but ordering a can tune on anything and not having a wide band afr meter to verify the tune is working properly is insane. Every machine is a little different. Fuel pressure could be slightly different.
It's not your fault but these problems can be avoided by doing one pull in a field and watching the afr to verify it's in the range the tuner wants it. Infact you could of had a weak or clogged Injector and this would of shown it's self on a meter.