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**Dominic Toretto** · 07-03-2013, 08:54 AM

I have tried searching and can't seem to again find the actual differences in those motors. I searched before through google and found some link (can't confirm if it was Ford or not) that stated that there were some serious changes which allowed the update in power. Anyone have that info or a good link here?

-Alex

**KungFuHamster** · 07-03-2013, 09:15 AM

Originally Posted by Dominic Toretto

I have tried searching and can't seem to again find the actual differences in those motors. I searched before through google and found some link (can't confirm if it was Ford or not) that stated that there were some serious changes which allowed the update in power. Anyone have that info or a good link here?

-Alex

The 11-12's have a different head bolt, the 11-12s have piston oil squirters, the 13+'s do not...their pistons have a coating on them. the front engine cover is different on the newer motors as well. thats all i can think of off the top of my head.

**Grandpa** · 07-03-2013, 09:15 AM

There is no difference in power. The only difference is no oil squirters in the 13+.

**DirtyD** · 07-03-2013, 09:18 AM

A slightly revised tune on the 2013 gave them a smoother low end TQ curve, and also they "gained" 8 crank HP, but no one is sure where that was accomplished at (squirters or tune revision)

**Kaane** · 07-03-2013, 10:28 AM

Originally Posted by Steve

There is no difference in power. The only difference is no oil squirters in the 13+.

From what I have heard, the squirters are still there. Some engine builders say only change is different head bolts.

**Grandpa** · 07-03-2013, 10:42 AM

Originally Posted by DirtyD

A slightly revised tune on the 2013 gave them a smoother low end TQ curve, and also they "gained" 8 crank HP, but no one is sure where that was accomplished at (squirters or tune revision)

LOL, the slight bump in power was due to the loss of windage and not a tune revision.

The 13+'s do also have the smaller head bolts which doesn't really effect power. There have been a few reports here and there about a head lifting under big boost applications but those are few and far between.

**03MachMe** · 07-03-2013, 10:43 AM

the 13s are faster!

**DirtyD** · 07-03-2013, 11:10 AM

Originally Posted by Steve

LOL, the slight bump in power was due to the loss of windage and not a tune revision.

The 13+'s do also have the smaller head bolts which doesn't really effect power. There have been a few reports here and there about a head lifting under big boost applications but those are few and far between.

Hey, that is the information that was discussed when the 13s came out and were starting to be analyzed. I never saw anything else to to combat that theory. I'm just posting what I've heard. It is has been shown the TQ curve is smoother through the low RPMs though. It would make sense that a slight decrease in rotational weight would let the motor produce more work over the same time.

**Grandpa** · 07-03-2013, 11:11 AM

Originally Posted by DirtyD

I'm just posting what I've heard.

**03MachMe** · 07-03-2013, 11:14 AM

Originally Posted by Steve

because your posting on the extensive number of motor builds you have done one 11-12s and 13s????

**DirtyD** · 07-03-2013, 11:14 AM

Originally Posted by Steve

Okay, so if I said "I have read that it is supposedly...", would that have gone over better with you.

**Grandpa** · 07-03-2013, 11:16 AM

Originally Posted by 03MachMe

because your posting on the extensive number of motor builds you have done one 11-12s and 13s????

You're missing my point.

**Grandpa** · 07-03-2013, 11:17 AM

Originally Posted by DirtyD

Okay, so if I said "I have read that it is supposedly...", would that have gone over better with you.

Ha..nice.

**Dominic Toretto** · 07-03-2013, 11:43 AM

I figured I would read around for crate engines. Wouldn't the engines have a different part number if something was changed? From the fordracingparts.com website part M-6007-M50 looks to be what comes stock in the cars. However when you go to this page http://www.fordracingparts.com/crateengine/Main.asp#mod, it says the horsepower rating is 412 but when you click on the link it says the horsepower is 420. Weird.

My original thought when I saw the hp difference was either an intake or exhaust change. It seems like that would be the case since there are no different part numbers for the 412hp and 420hp motors. Thoughts?

-Alex

**46Tbird** · 07-04-2013, 09:52 AM

There are different part numbers for '11-12 and '13-14 service replacement engines from Ford.

In Sept of 2012, my '12 GT needed an engine replacement at 23700 miles. The engine they put in it is a '13 service replacement (BR3Z6006J) and required a slightly revised wiring harness and they reflashed the PCM.

Picked up about 2mph in both the eighth and quarter...