Boss Long Blocks in Early 2014's

So for sure my August Built 2014 Base 3450 lbs 12000 mile Mustang GT Manual has a Boss ECU unit. Average Dyno reading for the Boss seems to be between 390 to 400 RWH. Some Dyno experts speculate they might actually do better with a standard manifold. That being said, I scheduled a Dyno run sometime next week. It cost $75 for three pulls. Since the place is only 5 miles away and a brand new facility, maybe that's a good deal. I understand 2 pulls for $40 is a very good deal. Everyone seems to agree the pull should be in fifth gear. Any comments before I have this done. It's really all stock except 255/45/18 Runflats and a stock tower brace added. All the stuff in the trunk is gone.

$75 is what I paid at my local dyno guy about 5 years ago, I had 3 pulls as well. From what I've seen that is about average cost. Just as a comparison my 2010 Roush 427r dyno'd 390.73rwhp, 351.40tq
I have an automatic and think he did it in 3rd gear....

I would say anything over 380 would make me think the rumor might be true. With a 3:31 gear, it would have to be in 4th as 5th at 6850RPM is 166mph.

Theres really no way thats true, for multiple reasons... But if you really must prove it to yourself, go buy a borescope and look at the tops of your pistons.

https://www.harborfreight.com/digital-inspection-camera-61839.html

Does anyone have a picture of the top of a Boss Piston??? The dyno test won't hurt and it's really on brand new equipment. This I do know. I purchased a SCT Tuner some time back on EBay. It was set up for a Raptor Truck and unmarried. I just reset it to stock and updated it with the available free software. I did hook it up on monitor only and had the timing readout as I drove. At full throttle, it went to 25 degrees and slowly, as the RPM climbed, timing pulled back to about 19. I understand it will do that by the knock sensor that senses a knock or gas octane or any other reason like stones on the road to protect the motor. I do buy Exxon 93 gas at $3 a gal at a discount gas station. Everyone else sells it for $3.50. Ford says the only gas that is 93 when they say it's 93 is from a BP Station. So there is another factor.

Then I understand some tuners see this and they say, I know, I will disable the knock sensors, set the timing to 27 and bingo, more power. That will be $100 please.

WARstang said:

Theres really no way thats true, for multiple reasons... But if you really must prove it to yourself, go buy a borescope and look at the tops of your pistons.

https://www.harborfreight.com/digital-inspection-camera-61839.html

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You might want to list those multiple reasons if you have them. Or it might by you have no idea what the story is but what ever the story is, for Ford to use Boss ECU's in early build 2014's, it's for some other story then that story.

Your GT does not have a Boss 302 long block. Not going to argue with you. If its that important to you, spend $75 for a inspection camera and post the picture.

I do have this from Ford. Connecting Rod CR3Z-6200-B For all Boss and 2015+ 5.0 Mustangs King Ranch, Lariat with 5.0 Flex Engines. So for sure if you have a 2015+ Mustang, you have Boss Rods. You even have Boss Rods in 2015+ Flex Fuel 5.0 trucks. So I see why there is no argument as you would have said that first if you knew that.

WARstang said:

Your GT does not have a Boss 302 long block. Not going to argue with you. If its that important to you, spend $75 for a inspection camera and post the picture.

Click to expand...

But it does have a Boss ECU. You might want to post a picture of a Boss Piston. So far I have not been able to find one. I have pictures of Boss Heads, Boss Cranks, Boss Rods but no Boss Pistons.

Then I understand the reasons the Gen II and III engines can not be used with Gen 1 applications is in short, the firing order is different.

This got me to do a little research. Crankshafts are identical castings with the Boss Crank having balanced weight of 1683 vis 1619.4 for the GT. The price for the standard GT crank from Ford is $200 and a Boss crank now is now going for a little over $300. Part Numbers FR3Z-6303-C for GT and M-6303-M50B for the Boss. The Boss Crank like the GT are NOT forged in a 1960's sense. Boss Rods are heaver and may have come from truck applications. They are also now being used in Gen II and III Coyotes. Ford charges $25 each for them under Part Number CR3Z-6200-B. A standard GT Piston is FR3Z-6108A and is $15 each. The Boss Piston seems to be heaver and was at one time sold as an assembly with the rod by Ford. Everyone knows the Boss Heads are standard castings that are CNC Ported by a sub contractor. Update!! The Boss Piston has more machine work on the top. So a bore scope would work.

An Update. It rains 6 hours a day here and has done so for 20 straight days. So I have not got a chance to make an appointment for a Dyno run. In the mean time, I tried to get a standard key made by a locksmith. No go but he did tell me my build date was Aug 3 2013. For sure I have a BOSS ECU. Ford wants $300 for a standard key and they say they earn every penny doing it.

Then I read about the 60 to 100 test. This is done in Europe a lot and the web site gives a calculator and typical times. A Mustang Coyote comes in at 5 seconds flat and a Z06 comes in around 4.7 seconds. A 1000 hp Bugatti is 3 seconds flat. My quick tests come in at about 4.8 seconds. My Altama 3.5 SR is about 7.5. So rather then a Dyno run, I might just do a bore scope of the rods on the next oil change to see what is up.

Another way to think about this is a Boss Long Block is nothing more then a Flex Fuel Truck short block with CNC heads.

This is the first I've heard anything about "early-build'14" anything.
The story so far has been that late-build '14 GT's got '15 heads.
And some '14's, also late-build, were able to get the Track Key option programmed in.
That didn't mean "Boss ECU".
And it didn't mean "Boss longblock"

Gabe said:

This is the first I've heard anything about "early-build'14" anything.
The story so far has been that late-build '14 GT's got '15 heads.
And some '14's, also late-build, were able to get the Track Key option programmed in.
That didn't mean "Boss ECU".
And it didn't mean "Boss longblock"

Click to expand...

Well Track Key was only available for 2014's around Feb 2014 and discontinued by mid March 2014 far before any late build 2014s were made. Even Ford states Track Key was available for 2014's made after July 1 2013. For sure I have a Boss ECU in a Aug 3 2013 built Mustang GT 6 spd manual. Then it does look like the BOSS crank, rods and pistons were used in several years of "Flex Fuel" trucks. There is a set available for $1200 on Ebay.

Larry, Larry, Larry ... I know you're excited about having the Mustang but reading this thread has given me a headache ...

To reiterate what Gabe and Warstang sed, You do not have a Boss longblock.

"""Another way to think about this is a Boss Long Block is nothing more then a Flex Fuel Truck short block with CNC heads."""

"""The Boss Piston seems to be heaver and was at one time sold as an assembly with the rod by Ford. Everyone knows the Boss Heads are standard castings that are CNC Ported by a sub contractor. Update!! The Boss Piston has more machine work on the top. """

Wrong on almost every level, The Boss 302 used a head specifically cast for the Road Runner program, and used FORGED pistons. So, you are right there, the Boss piston actually is machine finished ...

http://www.mustangandfords.com/car-reviews/m5lp-1108-2011-ford-mustang-302/

"""The Boss Crank like the GT are NOT forged in a 1960's sense."""

I'm not sure what you mean by that, I'm fairly certain the forging process hasn't changed since well forever, just the manufacturing and machining has greatly improved with CNC machine tools. The Coyote crank is made out of 4130 alloy, perhaps not as strong as 4340 steel, but I have yet to hear of a crank breaking.

The Boss crank has a different bob weight [and balance] to account for the heavier rods/pistons..

"""Boss Rods are heaver and may have come from truck applications. """

Boss rods were designed for the Road Runner program ...

"""Then I understand the reasons the Gen II and III engines can not be used with Gen 1 applications is in short, the firing order is different."""



https://performanceparts.ford.com/download/PDFS/FPP_Gen_2_Coyote_Technical_Reference_2-16.pdf

"""Ford says the only gas that is 93 when they say it's 93 is from a BP Station."""

Ford has a marketing tie in with BP, Much like Chrysler has with Shell. Ford has no way of knowing what octane is actually in the tanker.

It's up to your state to check the quality of the fuel in the storage tanks every so often, I asked a NC DOT inspector once what the octane rating were supposed to be and he said whatever grade you're pumping is the minimum octane rating, 93 means a minimum of 93. He said it's rare for a tank to test less than what it's supposed to as the station would be fined.

As for power #'s, my wife's late build 2014 bone stock M6, 3.31 gears made 388rwhp/370rwtq on a DynoJet.

As for why Ford went with a 'Track Key' for the late build 2014's?? I think they had a lot of left over key's they wanted to get rid of and figured they could unload them at 600 a pop or whatever it sold for..

Time wise, I've ran it once and clocked a 12.8xx at 110 on the quarter on the stock all season spinrelli's ..

.

All of this does not change the fact that my Aug 3 2013 built Mustang GT without a doubt has a double path BOSS ECU with the correct part number. Now just why, I am not sure. The parts interchange book tells a story. That is the Boss Short block is really a Flex Fuel Truck short block and the heads are standard heads that are CNC Ported. The interchange parts book also says my ECU on my Mustang GT will interchange with the 2013 Boss ECU made just a few months before. So sure, it could be a big misunderstanding on my part. It also could be a big misunderstanding on your part on what late build and early build means as track keys were not available before Feb 2014 and or after March 2014.

Add for 2014 Mustang GT Track Key

LOL. Best thread on the forum.

Picture of new BOSS stuff on Ebay for $1300.