Reliability of the Mountune 2.3L shortblock

Warriormonx · Feb 10, 2020

Hi all,

I have picked up a new Mountune shortblock for a cracking price near to where I live. It is sleeved but as it is built on the 2.3 open deck block, should I be nervous about tuning to the advertised 500hp Mountune state the set up can sustain reliably? I have an NX2, aux fuel and meth on my current stock long block and that has been solid as a rock on 400-410hp. Has anyone else heard of these blocks cracking?

Sent from my iPhone using Tapatalk

TyphoonFiST · Mar 1, 2020

Warriormonx said:

Hi all,

I have picked up a new Mountune shortblock for a cracking price near to where I live. It is sleeved but as it is built on the 2.3 open deck block, should I be nervous about tuning to the advertised 500hp Mountune state the set up can sustain reliably? I have an NX2, aux fuel and meth on my current stock long block and that has been solid as a rock on 400-410hp. Has anyone else heard of these blocks cracking?

Sent from my iPhone using Tapatalk

No but I guess you will be the one to find out for us all! Good luck and God speed!

Warriormonx · Mar 1, 2020

TyphoonFiST said:

Haha - thanks! Have done some more homework and the consensus from Mountune, Tuned by Nishan and the Goddess of the RS - Jessica Livernois - is that the block is strong AF. I think I will be good for 500-550 wheel safely

Sent from my iPhone using Tapatalk

Warriormonx · Jul 20, 2020

TyphoonFiST said:

It’s in and tuned for 98. Ethanol next. Power is massive.

Sent from my iPhone using Tapatalk

4chriscar · Nov 11, 2021

Looks like you did a job well done with this build.

Thread starter	Similar threads	Forum	Replies	Date
S	FS Mountune Street Brake Pad set front & rear	For Sale	0	Oct 12, 2021
F	SLD Mountune High Flow Induction Kit - Focus RS	For Sale	0	Aug 7, 2021
A	SLD Mountune Rear Motor Mount	For Sale	0	Mar 1, 2020
	Ford Focus RS Mountune M400	Focus RS Engine Performance	0	Oct 12, 2017
	Honda Civic Type R vs. Ford Focus RS Mountune	General Automotive Discussions	0	Sep 30, 2017
	weekend deal - 1 set of Mountune lowering springs	whoosh motorsports	6	Aug 25, 2017
	Mountune M400 Package gives the Focus RS Up To 400HP	Focus RS Engine Performance	0	Aug 20, 2017
	TheSmokingTire - Matt Farah Takes His Mountune Focus RS to Track	Focus RS Photos & Media	0	Jun 22, 2017
	Ford Focus RS Mountune FPM375	Focus RS Engine Performance	0	Jun 13, 2017
	HUGE SALE - COBB AP, MOUNTUNE, Team Dynamics, Velossa Tech, Maxton.............etc.	whoosh motorsports	26	Apr 22, 2017

Sign Up! To view all forums and unlock additional cool features

Reliability of the Mountune 2.3L shortblock

Warriormonx

New Member

TyphoonFiST

9000 Post Club

Warriormonx

New Member

Warriormonx

New Member

4chriscar

Member

Similar threads

Ford Community Posts