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Boschma's Speed shop tuned 24 Mustang

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John boschma

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I see this posted all the time on car forums, and it's never that simple. The reality is that the dealership doesn't have to prove shit in order to not cover something. They can--and many will--say "your car was tuned, so this isn't covered by warranty." It's then up to you to either find another dealer that you think might honor the warranty (even though you modified the car), or to take them to court and spend more money and time than the repair probably even costs. If you can't pay to play, don't tune your car.
Worked in the dealerships for many years. Yes dealers do that crap, but their not supposed to. You can push the issue with the dealer, and even call ford.
Dealers are lazy and uninformed, they just say that you're warranty is voided or they won't work on it because they don't want to do the work that involves figuring out what caused the issues.
By federal law they cannot void your warranty unless they can prove a specific modification is the cause of any failure you're seeking to get repaired under warranty.
So if you choose to be just as uninformed as the dealership, then yes you'll get screwed.
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smurfslayer

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By federal law they cannot void your warranty unless they can prove a specific modification is the cause of any failure you're seeking to get repaired under warranty.
So if you choose to be just as uninformed as the dealership, then yes you'll get screwed.
From the consumer side:

You can sweet talk and negotiate with the dealer all you want, but if you have zapped the computer system, the onus is on you the consumer to prove to an arbitrator, customer service or a jury that it didn’t cause the failure in the powertrain. As I’ve said in other threads here - having prevailed in a lemon law suit, there’s what the law says, and there is the ‘common law’ and how it is applied.

The courts have basically accepted that the stealership may deny coverage once the affected ‘system’ is modified. It’s questionable if, say, you add sub frame connectors, and break an axle. It’s not questionable if you modified the computer, adding say 30hp and tq. and break an axle or half shaft and they deny coverage because you (generally, not you personally) modified the powertrain from as delivered.

We modify the powertrain, we own it. We modify the stereo, and the powertrain fails, Ford still has to fix it. We modify the powertrain - and some unrelated powertrain issue fails -an injector or similar; they may not cover it, they may let it go but if corporate calls them on it, I’m pretty sure the dealership is going to take a financial hit.

Aftermarket warranties are a horse of a different color entirely. Any modification you make they will automatically deny coverage, even if unrelated because their entire business model is based on profit and denying coverage, paying out as little as possible when they must.

A tune _may_ not be found to be at fault, but it is very, very unlikely today that a service department will cover a tuned car/truck/etc for a powertrain failure.
 

GrabThatBlue

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Worked in the dealerships for many years. Yes dealers do that crap, but their not supposed to. You can push the issue with the dealer, and even call ford.
Dealers are lazy and uninformed, they just say that you're warranty is voided or they won't work on it because they don't want to do the work that involves figuring out what caused the issues.
By federal law they cannot void your warranty unless they can prove a specific modification is the cause of any failure you're seeking to get repaired under warranty.
So if you choose to be just as uninformed as the dealership, then yes you'll get screwed.
The problem is that if a dealer doesn't want to do further inspection, and claims no warranty due to tuning, you maybe in your right, but the problem is, to get your right, it will take a long process with too much headache and stress.

So it's not about being in your right. It's about getting your right. It even can lead to courtcases and a lot of stress. Nobody is waiting for that and the dealer knows that, and that's why they are doing this to people. 95% will not fight back, so they win a lot of money. 5% fight back and they will happily pay for them because they already saved a lot of money from the other 95% who didnt fight.
 

Q6543

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Thankfully this is such a robust fully engineered motor that ford has been making better and better for 15 years…

I didn’t give a 2nd thought to my engine warranty, get a few hundred miles on it to make sure nothing catastrophic from assembly and you’re good to go!!
 

GrabThatBlue

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Most people who are not afraid for the engine are the people who are not keeping the car for a long period.

Most of the people I see here are either not driving their car or selling the car after 1 to 3 years.
I won't take any advice from people like that, because it would be very strange to brake your car in the first 3 years.
 


JohnWimsey

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I’m cracking up, because people are DEFINITELY out here racing dynos 🤣

I almost never dyno my setups and all people seem to care about is “what it makes on the dyno”… I’m like F if I know traps high 140s 🤷

Just funny how caught up in it folks get, that new ZR1 supposedly made over 1000 to the wheels.. “Chevy sandbagged it” I heard over and over…
Thing trapped 141….GTFO.. 800’ish maybe lol
I’m cracking up, because people are DEFINITELY out here racing dynos 🤣

I almost never dyno my setups and all people seem to care about is “what it makes on the dyno”… I’m like F if I know traps high 140s 🤷

Just funny how caught up in it folks get, that new ZR1 supposedly made over 1000 to the wheels.. “Chevy sandbagged it” I heard over and over…
Thing trapped 141….GTFO.. 800’ish maybe lol
Personally I thought it was a conversation about end results between coyote build generations running basically the same modification but if you see something more into it. Good for you.
 

JohnWimsey

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That's a nice number, but we don't race dynos. The only number that matters is that little ticket they give me at the end of the track
Personally I thought it was a conversation about end results between coyote build generations running basically the same modification but if you see something more into it. Good for you.
 
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John boschma

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I couldn't tell you. It might fit over the boss intake, probably not the cobra jet
 

robvas

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Just funny how caught up in it folks get, that new ZR1 supposedly made over 1000 to the wheels.. “Chevy sandbagged it” I heard over and over…
Thing trapped 141….GTFO.. 800’ish maybe lol
They dynoed a second one at the same place, not quite as high but still broke 1k

S650 Mustang Boschma's Speed shop tuned 24 Mustang Screenshot 2025-07-14 at 9.56.53 AM
 
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John boschma

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They dynoed a second one at the same place, not quite as high but still broke 1k

Screenshot 2025-07-14 at 9.56.53 AM.webp
Is this a freaking corvette page or a mustang page
They dynoed a second one at the same place, not quite as high but still broke 1k

Screenshot 2025-07-14 at 9.56.53 AM.jpg

Is this a corvette page or a mustang page? Go somewhere else and talk corvette crap
 

Puddinpop

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I’m cracking up, because people are DEFINITELY out here racing dynos 🤣

I almost never dyno my setups and all people seem to care about is “what it makes on the dyno”… I’m like F if I know traps high 140s 🤷

Just funny how caught up in it folks get, that new ZR1 supposedly made over 1000 to the wheels.. “Chevy sandbagged it” I heard over and over…
Thing trapped 141….GTFO.. 800’ish maybe lol
141 in swamp air. Later trapped a 149. That thing is definitely making what's advertised. Come fall/winter that thing is going to hurt a lot of feelings roll racing.
 

Junkyard Dog

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Question answered, I was wondering what widget was used to mount the two throttle bodies to an intake design for a single oval throttle body.
Cobra Jet V2 has two holes for throttle bodies, and, as you can see in his photograph, he has a small aluminum welded plenum between the Cobra Jet V2 manifold and the dual throttle bodies.
 

Junkyard Dog

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We got it on the dyno yesterday morning, and made about 6 or 7 pulls with several reflashes.
We gained 71hp on just the 93 tune over the baseline.
And another 32 hp on E85.
So we have a total gain of 103hp

Mods:
Full length 1 7/8 headers no cats
Exhaust dumped at the axle
cobra Jet V2 intake
K&N air filters with stock inlet tubes

Car ran a best of 10.77@127 with the stock tune. Stay tuned to see what it runs with the tuning.

Boschma's Speed Shop
South Beloit Illinois

20250711_143236.webp


20250623_171002.jpg



A lot of work went into this Mustang, which ran in the 10s naturally aspirated before tuning.

Now they were able to tune it, and they added over 100 horsepower on a very stingy dyno.

Congrats! Good job.

But they post it here to let everybody know what they accomplished, and for responses they get a bunch of bitching that amounts to, I don't care because I just want to know what it adds to an otherwise stock car, I can beat that with a Whipple, It's too expensive to add headers and all of that, a tune might get my warranty claim denied, you took weight out of the car . . . and so on.

Geez.

Just congratulate him and move on. He has done something worthwhile. He shared it with you.
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