Mtntk Fix Kit P.A.R. Head

[Karnk]

Hey fellas

Im currently installing a Mtntk Fix kit in my 2012 Rmk assault. It has a P.A.R. head(not sure the comp ratio came with the sled). GGB Mountain exhaust. oiler turned up. Stock everything else.

I've been trying to research this but all the info I can find is for the 2013+ rmks.
I believe the engines are slightly different (Stock Pistons).

My question is do I need a fuel controller to run the high compression head and fix kit? I've noticed there has been some advice thrown out to other guys in my situation to change the clutch weights. Maybe someone could take me to school on the whole deal. Also if I need a controller which map?

Even if you can point me in the right direction that would be great

Thanks

 

[BILTIT]

I am running an '11 long rod and 13.6 par head, runs great with no fuel controller. I do have a pcv and a map from dyno tech that i will be running this year, takes some fuel out at wot as the 11's (12's too I am sure) are too rich.

 

[Sheetmetalfab]

Depending on compression ratio of head.
Should be fine.
The fix kit bumps compression usually.
Set ring end gap at least .022"
Check squish before running it, if you are worried just put an extra base gasket right off the bat.
Run good octane for sure.

I ended up with no controller at sea level with a long rod motor and par 12.5-1 head on top. Slp can
2011 pro.

My brother ran his 11 pro with mtntk fix kit and par head setup the same way with no issues.

Note both of us have controllers on the shelf that we ran all kinds of maps in (pcv).
Stock mapping was always better..........

 

[Karnk]

Thanks guys. I have been reading a bit on squish. Any idea on what the squish should be at?

 

[T G]

every par head I've seen has the comp. on top the dome.

 

[BILTIT]

Yup, either the ratio or the cc of the dome on top. A compression test can be a decent guess too.

 

[Karnk]

Your right it says 38cc on the domes. not stamp in. It looks like some etched them it on. sound right? what does it mean?

 

[BILTIT]

Yup, I think that Is the 12.5 comp. I would have to check mine in the garage.

 

[Sheetmetalfab]

Yep 38 cc is 12.5-1

Check squish with solder inline with the wrist pin.
Bend into L shape insert thru spark plug hole. Turn motor over by hand.
Opinions vary for squish setting.
I would go no tighter than .055

 

[Karnk]

The squish should be near the edge of the piston correct?

 

[Sheetmetalfab]

Yes.

 

[Karnk]

Legit! Thanks for the help. You guys are Kings!!

 

[Ultrasauras]

MTn TK and par head

I rn a 13.6-1 and a fix kit on m 2012 i run 50/50 av premium in the mountains, my buddy has the same set up on hi 2013 with no fuel controler. you should be fine with pump gas.

 

[beamslayer]

I have a 11 assault with fix kit and 13-1 par head . We ride from 2800 to 6000 elevation . I was running into a lot of det issues at first at low elevation so I installed a rubber fender wash under my det sensor and I also went to a Gen4 fuel controller from Dobeck . I am running 64 gr BB with the Carls clutch kit . I am still having some det issues at lower elevations .
I tried a SLP pipe with a HPS can and did not notice any improvements so I went back to stock pipe .
I am very impressed with the power gains with this set up and so are 90 % of the people who ride it .
Now I just need to figure out why some times it just falls on it face when you punch it or when you are climbing . It does not happen all the time so it is hard to narrow down and I have never tach or 8300 it pulls 8150 most of the time.

 

[Ultrasauras]

I have a 11 assault with fix kit and 13-1 par head . We ride from 2800 to 6000 elevation . I was running into a lot of det issues at first at low elevation so I installed a rubber fender wash under my det sensor and I also went to a Gen4 fuel controller from Dobeck . I am running 64 gr BB with the Carls clutch kit . I am still having some det issues at lower elevations .
I tried a SLP pipe with a HPS can and did not notice any improvements so I went back to stock pipe .
I am very impressed with the power gains with this set up and so are 90 % of the people who ride it .
Now I just need to figure out why some times it just falls on it face when you punch it or when you are climbing . It does not happen all the time so it is hard to narrow down and I have never tach or 8300 it pulls 8150 most of the time.

Add 2 more grams of weight and i bet it stops falling on its face.

 

[beamslayer]

I would think if I am pulling 8150 I am not hitting my rev limiter so what would 2 more gr due for me ?

 

[Sheetmetalfab]

I would think if I am pulling 8150 I am not hitting my rev limiter so what would 2 more gr due for me ?

With mtx wieghts adding 2 g to the heel helps alot.

With the fuel controller i got quite a few midrange faceplants from overfueling.
It could be a sticky roller in the primary also.
P85 clutches like smooth rollers.
I had the same issues low finish rpm and midrange overrev

 

[geo]

If your checking squish and you have an aftermarket head (with the MNTKT pistons) make sure you measure outer edge and inner edge with your mic.

Outer edge must be equal or less to inner edge or det issues will be consistant.