Re: 2015 Mustang Ecoboost K/SA?
 

The classification guide does not list the 2018 Ecoboost Mustang, so if you wanted to run it, I think you'd have to back-date it and run it as a 2015 model. I know the nose is different, but I don't know what else is different.

If you're able to run it, it would be a natural J/S car at 12.78 pounds per factored horsepower. You could add or subtract weight to run one class up or down (K/S or I/S).

If the one you have is a Performance Package car, they have larger/heavier front brakes than the non Performance Package car.

Have you driven it?

Re: 2015 Mustang Ecoboost K/SA?
 

I want to see Ecoboost Mustangs heads-up racing Ecotec Camaros. Stick only and we could call it Jr Factory Stock. It would sound like a swarm of mad bumblebees :D

Re: 2015 Mustang Ecoboost K/SA?
 

I didn't drive that one. I did drive a 2018 GT350 a couple of weeks ago. Pretty quick and I like the sport mode for the exhaust.

Re: 2015 Mustang Ecoboost K/SA?
 

I don't think the GT350 (or it's flat-plane engine) is listed in the NHRA Stock Classification Guides, and it's only available as a stick-shift.

Re: 2015 Mustang Ecoboost K/SA?
 

I didn't think it was either. I think the ecoboost Mustang would be a fun ride. Stickered at $35,000 isn't that bad either.

Re: 2015 Mustang Ecoboost K/SA?
 

Stickered at $25,000 is even better. :)

Re: 2015 Mustang Ecoboost K/SA?
 

Very true. I think this is the top of the line package. Orange Fury is the color.

Re: 2015 Mustang Ecoboost K/SA?
 

The base Ecoboost Mustang starts at $25,845.

The "Premium" Ecoboost Mustang starts at $30,860.

The Orange Fury paint (which I like) is a $495 option.

And the "Performance Package", which adds 19" wheels, stiffer suspension, 3.55 Torsen diff, bigger brakes, and a few other odds and ends, is a $2,495 option. This option would make it more fun as a street car, but the extra weight would not be helpful for a drag car. I'd pass on the "Performance Package" and put that $2,495 into things that make it go faster.

Re: 2015 Mustang Ecoboost K/SA?
 

I agree totally. If I were to get one I would special order it and get all the extras deleted off. No need to pay for something you are going to take right off. Order the stiffer rear gear right from Ford and take advantage of some of their performance stuff.

https://performanceparts.ford.com/part/M-4209-88409A

https://performanceparts.ford.com/part/M-4130-MA

Re: 2015 Mustang Ecoboost K/SA?
 

I don't think you'll need the rear axles for a Stock Eliminator type car.

And I'd run the numbers before purchasing the 4.09 ring & pinion- the power peak on the Ecoboost engine is only at 5,500 rpm. First gear is so deep, that you'd have a pretty steep launch ratio even with the stock gearing. And turbo engines tend to be more tolerant of taller gearing anyway.

Re: 2015 Mustang Ecoboost K/SA?
 

2015 Ford Mustang Ecoboost Auto on craigslist Portland Oregon for $17,500 if interested?

Re: 2015 Mustang Ecoboost K/SA?
 

I would use the stronger half shafts regardless. Especially using slicks and shocking the rear end at the launch. With the stiffer gear and it shifting into over drive I would think the 4.09 gear should work fine.

Re: 2015 Mustang Ecoboost K/SA?
 

If you were going to switch to a C4, then the 4.09 might be needed, but if you're using the stock 6R80 transmission, I'd gear it to go through in 4th and leave it.

The 6R80 transmission has a 4.17 first gear. If you combine that with a 4.09 ring & pinion, that would give you a launch ratio equivalent to running a C4 with a 6.50 rear gear. I just don't think that's necessary for an engine that makes almost all of it's torque by about 2,500 rpm.

The calculations I ran, had the car going through in 4th gear, which is 1.14. 5th gear is .87, and 6th gear is .69. This engine makes so much torque and has such a wide powerband, with a horsepower peak at a relatively low 5,500 rpm, I don't think it would need to use that many gears to get down the quarter mile efficiently.

With a 30" tire, a 3.73 ring & pinion, and a 1.14 4th gear, the car would do just about 115 mph at 5,500 rpm through the lights.

With a 28" tire and the stock Performance Package 3.55 rear end gears, it would do 113 mph at 5,500 rpm in 4th.

With a 28" tire and the stock non Performance Package 3.31 rear end gears, it would do about 115 mph at about 5,300 rpm in 4th.

I'd be tempted to try it with a 28" tire and the stock gearing.

Re: 2015 Mustang Ecoboost K/SA?
 

Earlier in this thread, there is a video of a stock-turbo stock-engine street Mustang Ecoboost running an 11.03 at 122 mph, on the stock axles.

If you can get a K/SA four-cylinder Mustang into the 10s, then yes, the rulebook will require you to run aftermarket axles. But until that point, I think that $2,000 would be better spent elsewhere, in my humble opinion. :)

Re: 2015 Mustang Ecoboost K/SA?
 

Have you bought a Mustang Ecoboost yet or did you check on the one I posted for you on craigslist because you will not find one any cheaper?Just Saying.

Re: 2015 Mustang Ecoboost K/SA?
 

I never heard of this 15% rule before this thread, where is it published?

So would a MY2008 car get the 15% reduction? There's a certain Pontiac Solstice/Saturn Sky combo that Billy Nees likes a lot that the rule may apply to.

They did make a few Pontiacs & Saturns in 2009, but they're not in the Guide. If they were to be added to the Guide, would they get that 15% reduction?

Pontiac made a G8 GXP with a 400HP LS3 & a stick in 2009 that's not in the guide, which would be pretty cool also!

Re: 2015 Mustang Ecoboost K/SA?
 

Kyle;

The 15 % reduction on combos already listed in the guides never went into effect.

Jesse tried. He had a meeting with NHRA but Glendora did not go for the idea of re-factoring existing 1996 and later production line ( VIN )combos.

However, I do believe his meeting set the foundation for the current 85/85 deal for all new combos listing in the guide this year (and beyond)

Re: 2015 Mustang Ecoboost K/SA?
 

Thanks for the info!