GT350 heads vs 5.0 ported

[GregO]

That's a huge lift difference

Oh man I’m talking 3/4 and Full race cams…….this Yote stuff is 1/2 race at best…. OG stuff.
Splitting hairs over the thickness of a matchbook cover.
I get where you’re coming from though. Point taken

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[illtal]

MMR has a lot of information here. Either you need custom cams or this....

http://www.modularmotorsportsracing.com/cart/index.php?main_page=product_info&products_id=885

 

[GregO]

I personally would not use the modified rockers,

What’s your technical hang up with the modded rockers ? Just wondering

 

[illtal]

@GregO
They look like it is clearanced....
I would need a guarantee they are they are as strong as non clearanced ones.

 

[bauern]

MMR has a lot of information here. Either you need custom cams or this....

http://www.modularmotorsportsracing.com/cart/index.php?main_page=product_info&products_id=885

Well aware of their marketing on this. Ford cross plane cams are relatively inexpensive (compared to aftermarket coyote cams) and the stock predator rockers are about $6. ea.

What’s your technical hang up with the modded rockers ? Just wondering

If you have to clearance the body of the rocker arm to clear the cam lobe, then the lobe and roller are improperly aligned.

 

[GregO]

@GregO
They look like it is clearanced....
I would need a guarantee they are they are as strong as non clearanced ones.

Oh yeah I looked over them a few years back.
Nothing that I seen from the relief cut that IMO compromise integrity. The 4 valve design uses freakishly low tension valve springs when compared to high rpm 2 valve.

 

[illtal]

Well aware of their marketing on this. Ford cross plane cams are relatively inexpensive (compared to aftermarket coyote cams) and the stock predator rockers are about $6. ea.

If you have to clearance the body of the rocker arm to clear the cam lobe, then the lobe and roller are improperly aligned.

6 dollars? where? lol

 

[bauern]

6 dollars? where? lol

I had just looked earlier today, parts.ford.com. $6 was MSRP, $5 retail.
This part fits your 2020 Ford Mustang
Change Vehicle

Engine Rocker Arm. Valve Rocker Arm - 5.2l.
Part #: 6564

Usage: 08/26/2019, Mustang, 5.2L Predator OHC SC PFI Gas
Section:Cylinder Head
Most parts available next business day.

Your Price: $5.08
MSRP: $6.77

 

[GregO]

If you have to clearance the body of the rocker arm to clear the cam lobe, then the lobe and roller are improperly aligned.

As far as I’ve read in the past the GT350 cam base circle was reduced vs. Coyote. That’s the issue and the reason for the relief when using Coyote cams.
Rocker geometry remains unchanged.

 

[illtal]

I had just looked earlier today, parts.ford.com. $6 was MSRP, $5 retail.
This part fits your 2020 Ford Mustang
Change Vehicle

Engine Rocker Arm. Valve Rocker Arm - 5.2l.
Part #: 6564

Usage: 08/26/2019, Mustang, 5.2L Predator OHC SC PFI Gas
Section:Cylinder Head
Most parts available next business day.

Your Price: $5.08
MSRP: $6.77

seems like a typo, i'm going to get these anyway, all of the other rockers for other variants are WAYYYY more expensive even on parts.ford.com.

 

[bauern]

As far as I’ve read in the past the GT350 cam base was reduced vs. Coyote. That’s the issue and the reason for the relief when using Coyote cams.
Rocker geometry remains unchanged.

This is MMR's photo, it's obvious there is misalignment of the lobe over the roller.

 

[bauern]

seems like a typo, i'm going to get these anyway, all of the other rockers for other variants are WAYYYY more expensive even on parts.ford.com.

I was surprised when I saw it too, and they interchange with Gen3 coyote. To be fair though, I believe if you order the Gen3 rockers, they include the lash adjuster.
I also went to FP as they used to have the predator rockers as a set but didn't see it there now.

 

[illtal]

I was surprised when I saw it too, and they interchange with Gen3 coyote. To be fair though, I believe if you order the Gen3 rockers, they include the lash adjuster.

I don't think so.... I mean I had to order them both
i didn't buy from parts.ford.com. If you do see this show me right away. I'll cancel that other order

 

[GregO]

This is MMR's photo, it's obvious there is misalignment of the lobe over the roller.

Are we not looking at an example of a VooDoo head with a Coyote cam and rocker installed ?
There is full roller to lobe contact.
Are the two centerlines perfectly centered, No but there is 100% roller to lobe contact.

As quoted from MMR;
Many of you may be asking what this means for you. Basically if you want to run your existing stock or aftermarket 11-16 cams it requires the use of a Modified rocker arm (now available from MMR), the rocker arm has been clearanced to mimic the GT350 rocker arms because the camshaft will actually touch the rocker arm due to the extended valve heights of the GT350 head. Many of you may be asking "why cant I just use a GT350 rocker arm?" . The answer is that the GT350 rocker arm is not compatible with the base circle of the 11-16 cams and will hold the valve open due to its relocated wheel.

 

[bauern]

I don't think so.... I mean I had to order them both
i didn't buy from parts.ford.com. If you do see this show me right away. I'll cancel that other order

Don't cancel, the gen3 are $30. lol.
I had ordered a gen3, predator and voodoo rocker arm to compare them over a year ago. The gen 3 came with the adjuster.

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