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Joined 1 year ago
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Cake day: June 9th, 2023

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  • I had my car dyno’d and tuned back in February. It has a naturally aspirated 3.5L V6. The tune bumped peak crank HP from 288 to 306 and torque from 254 lb-ft to 278, which is on par with the 3.7L variant of my engine.
    While the peaks only gained 6 and 9%, respectively, other areas saw even bigger gains. For example, below 4000 rpm most of the power band gained 15-20 lb-ft over stock. And above 4500 rpm, the torque continues to rise rather than plateau which I’ve noticed in hard accelerations.
    Another interesting thing is how much smoother the power band is compared to stock.
    This was a bit pricey, though, and I see why most people don’t do this often. All told, it was about $2500 to do: Pre-Dyno inspection, HP Tuners ECU, set of step colder spark plugs, putting it on the dyno, etc. Honestly, would do again and would like to do in the future.












  • The graph is showing horsepower (green lines) and torque (blue lines) over the engine’s rpm range. The solid lines are the stock run while the dashed are the tuned run. I wasn’t expecting huge gains. And most car people I talked to said not to expect much; one friend thought I wouldn’t get more than 10 horsepower. So the gains I got were actually better than I expected. But not by much.

    The main reason I did this was because I couldn’t find any data on tuning this engine. Ford put these engines in a lot of cars (Taurus, F-150, Explorer, Flex, Edge, and all the Lincoln vehicles), so there are a lot of them out on the road.
    And I know I’m not the only person who’s thought of tuning this engine. So I figured I’d take one for the team, tune mine, then share it with the world so other people can decide if this is right for them.


  • Pretty much. You can only do so much with a naturally aspirated engine. So if you want big gains from a tune, get a turbo’d engine.
    I could turbo it, but I don’t want to drop that much money on it at one time. Plus I’d have to replace the transmission because Ford only rated the 6F50 for 300 hp and 280 lb-ft.
    So that’d be another couple grand on top of the couple grand for the turbo.
    That’s just way more than what I can afford.

    As for mileage, 2-3 mpg actually feels about right. The computer is saying higher mileage than stock, but it’s not a huge gain. I need to do more driving before I can say just how much better it is.


  • It’s a 2015 model. So it’s far from new at this point. But it still has much less than 100k miles, so it still has a good bit of life left in it.

    If I could go back, I’d probably do exactly the same as I did.
    I actually plan on going back because I have a couple more things I want to do (ported intake manifolds, high flow air intake, a new exhaust as mine is getting rusty), but I’ll be adding those periodically. I want to see what each part does to the tune.




  • More sporty performing? The modern Mazda 3 is pretty compelling with its driving feel. Car and Driver routinely rates it as one of their favorite vehicles to drive in that segment.
    It can also come with a turbo 2.5L with 250 hp and 320 lb-ft. All in a hatch that weighs around 3500 lbs. AWD, too.

    I’m sure you could also bring it to a tuner to get even more power out of it. I recently got my car with a naturally aspirated 3.5L tuned, and simply from that and colder plugs, they squeezed out another 20-25 hp and lb-ft over the stock tune in some areas. Peak numbers increased by 14 hp and 19 lb-ft.
    A turbo’d engine could go even harder.

    But I do concede that I’m not the biggest fan on how it currently looks. It’s back end looks too rounded. I also heard visibility is poor with it.