S197 Boss 302 in Chile Build Thread Profile - S197 Mustangs

[Fabman]

Couple things to consider on this bracket. Ford made a running change on the secondary tensioners and all of the new ones are shorter in length than the originals. This MMR bracket won’t work with the new OE design. I talked to MMR about it, they confirmed it wouldn’t work and said they were working on a revised bracket. Not sure if that’s out yet - I would confirm before ordering if you have the shorter tensioners.

They offer billet aluminum tensioners that are made to the original OE length, so I bought a set so that I could use the bracket. After all of this, I couldn’t for the life of me get the cam phasers to slide onto the cams with the bracket installed. No real instructions on their site and like usual I was working well past their tech line hours. After an hour trying to get it to work, I abandoned the bracket and now have a really nice paperweight.

This is why I use all stock stuff. No big cams or stiff valve springs to break everything, no fancy parts. It just works.

 

[Coz]

This MMR bracket won’t work with the new OE design. I talked to MMR about it, they confirmed it wouldn’t work and said they were working on a revised bracket

It's covered within the description of the link

"Does Not fit 2018+ 5.0. 2018 5.0 Models please use PN#468995"

In any case Mad Hatter is using the Gen 1 timing components.

I have their billet guides and primary tensioners and had no problem during installation.

 

[67GTA]

It's covered within the description of the link

"Does Not fit 2018+ 5.0. 2018 5.0 Models please use PN#468995"

In any case Mad Hatter is using the Gen 1 timing components.

I have their billet guides and primary tensioners and had no problem during installation.

I wasn’t referring to the Gen 3 heads - there was a running change on the secondary tensioners for the Gen 1/Boss heads. The new design is considerably shorter:

 

[Mad Hatter]

Now I just have to buy a 3d Printer!

 

[Mad Hatter]

Couple things to consider on this bracket. Ford made a running change on the secondary tensioners and all of the new ones are shorter in length than the originals. This MMR bracket won’t work with the new OE design. I talked to MMR about it, they confirmed it wouldn’t work and said they were working on a revised bracket. Not sure if that’s out yet - I would confirm before ordering if you have the shorter tensioners.

They offer billet aluminum tensioners that are made to the original OE length, so I bought a set so that I could use the bracket. After all of this, I couldn’t for the life of me get the cam phasers to slide onto the cams with the bracket installed. No real instructions on their site and like usual I was working well past their tech line hours. After an hour trying to get it to work, I abandoned the bracket and now have a really nice paperweight.

Your post turned out to be a prophetic!!!

Opened the engine up and found this


The longer tensioner is the one from my old boss heads. The shorter ones are not fitting right for my livernoise gen1 ported heads. Lucky I have the old ones in good shape so I can race next weekend.

 

[Mad Hatter]

I wasn’t referring to the Gen 3 heads - there was a running change on the secondary tensioners for the Gen 1/Boss heads. The new design is considerably shorter:

View attachment 76719

actually this is quite confusing as the longer length tensioner is used on on the gen2 heads in the shop as well.....

 

[67GTA]

actually this is quite confusing as the longer length tensioner is used on on the gen2 heads in the shop as well.....

Yeah, that’s my understanding is the Gen 1, Boss and Gen 2 all use the same secondary tensioner.

 

[Mad Hatter]

I wonder if a floppy timing chain can lead to false knock........hmm.....

 

[67GTA]

Your post turned out to be a prophetic!!!

Opened the engine up and found this
View attachment 76797

The longer tensioner is the one from my old boss heads. The shorter ones are not fitting right for my livernoise gen1 ported heads. Lucky I have the old ones in good shape so I can race next weekend.

The short one that you removed doesn’t look like it was activated - shouldn’t it be extended like the longer one? They’re shipped with a plastic clip to keep them compressed. Once installed, you have to press down and it will release.

 

[Mad Hatter]

Hmmm.... the little black plastic cap below the tensioner does not stay fixed with the shorter tensioner, and on the side were the short tensioner seems to be working well, it fell off.


here it is in place.


When I look in TASCA, it says the part number goes from 2011 to 2020, for the Boss, Bullitt, gt350 and F150....ML3Z-6K254-A

 

[Mad Hatter]

Well, all set for Sundays race. We are in mid winter so temps will be just above freezing in the morning with a high of 10 degrees C. Going to put socks on my slicks! Engine sounds great with no more rattling timing chains. Will be thankful for my nomex long johns!!

Not a huge turn out in general, but I will have my four GT4's and a GT3 to contend with.

 

[Bill Pemberton]

Look forward to your race report, " Chilly racing in Chile." So damn cold I hope they have chili for us when we finished.

Go push around those Porsches!

 

[Mad Hatter]

I'll settle for a bbq when I get home! Going to have two s197 mustangs as well. All of us are cortex equiped so its going to be hard for the porsches. Lots of pushing!!!

 

[Mad Hatter]

Changed my windshield again... thats number 4 If I remember right. They only cost about 250 bucks down here installed. Flying stones does the job...

 

[Fabman]

Changed my windshield again... thats number 4 If I remember right. They only cost about 250 bucks down here installed. Flying stones does the job...

optic armor....

 

[Mad Hatter]

I Know!! But it will cost me US$1000 to get one brought down

 

[Fabman]

I Know!! But it will cost me US$1000 to get one brought down

That's crazy.

 

[Bill Pemberton]

Sounds like standard windshields it is. For the shipping you incur, plus the price of an Optic Armor windshield, you could buy 6 of those Chilean glass shields. I agree with Fab as the weight savings and protection make Optic Armor a great choice, but since they do break also, it sounds like you might as well stay the course.

 

[Mad Hatter]

Yes, yes it is.

 

[Fabman]

Yes, yes it is.

Is that 1k PLUS the windshield....or WITH the windshield?