S550 Bolton on 93 octane power estimates?

[Sean4m]

Hey guys so I’m installing my 1 3/4 cat less long tube headers tomorrow on my 2015 mustang gt and was wondering what numbers you guys are putting down. I've seen a pretty wide spread in terms of power some people making 400, other making 450+. Any recommendations for mods or power estimates would be great. I know I have a unusual set up but curious too see what you guys will think It will make. Thanks.

Currently mods:

- 1 3/4 catless long tube headers
- Borla atak catback
-Boss 302 Intake manifold (planning for boost)
-SR Performance CAI ( looking for new intake drop some suggestions)
- 93 oct tune from AutoMafiaRacing
- Car has 3.73 gears
- stock injectors/stock fuel pump (planning on new injectors and e85 in near future)

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[GregO]

Any recommendations on a different cold air intake would be great.

PMAS

 

[FruityJudy]

Youre probably 400-410 rwhp

 

[AZ18yote]

a sr performance cold air intake (am looking for a different intake drop some suggestions),

+18 oem intake with drop in high flow filter. Flows great, keeps iats down.

 

[Sean4m]

thanks for the suggestion will definitely check it out

PMAS

 

[ice445]

I would think 420-430

 

[TasGT]

These RWhp posts and claimed outputs always puzzle me.
Ford quote around 410hp for Model year 2015, that quote is engine output not RWhp.
So with an average 15% power loss between the engine and the wheels (for a manual and a bit more for an Auto)that would equate to around 341 RWhp On a stock 2015 GT.
To even get to 410 RWhp the OP’s modifications would need to take the engine output up to around 480hp. - A 70hp increase over stock
To make 450RWhp you would have to get the Engine producing around 530Hp - A 120hp increase over stock
I can’t see either one of those boosted figures being likely with just a new exhaust system and CAI?
But then I may be wrong.

 

[ice445]

These RWhp posts and claimed outputs always puzzle me.
Ford quote around 410hp for Model year 2015, that quote is engine output not RWhp.
So with an average 15% power loss between the engine and the wheels (for a manual and a bit more for an Auto)that would equate to around 341 RWhp On a stock 2015 GT.
To even get to 410 RWhp the OP’s modifications would need to take the engine output up to around 480hp. - A 70hp increase over stock
To make 450RWhp you would have to get the Engine producing around 530Hp - A 120hp increase over stock
I can’t see either one of those boosted figures being likely with just a new exhaust system and CAI?
But then I may be wrong.

These cars don't lose 15% though. Typical 15-17 GT's make like ~380* to the wheels ish. 2018+ cars make 415WHP stock. The "rule of thumb" imo is kind of outdated with modern power trains.

With that said I'm probably being optimistic that OP's mods will get him past the 420 mark.

 

[TRM99]

These cars don't lose 15% though. Typical 15-17 GT's make like ~370 to the wheels ish. 2018+ cars make 415WHP stock. The "rule of thumb" imo is kind of outdated with modern power trains.

With that said I'm probably being optimistic that OP's mods will get him past the 420 mark.

Dunno - if the 15-17's make 370hp to the wheels from a claimed 435hp, that equates to 15% as near as I can figure.

 

[ice445]

Dunno - if the 15-17's make 370hp to the wheels from a claimed 435hp, that equates to 15% as near as I can figure.

Sorry, meant to say 380. I could be wrong on that though, since my only data set is just perusing the dyno thread from time to time and "internet lore". The newer cars are around 9-10% loss which is pretty good for a RWD car.

 

[TRM99]

Sorry, meant to say 380. I could be wrong on that though, since my only data set is just perusing the dyno thread from time to time and "internet lore". The newer cars are around 9-10% loss which is pretty good for a RWD car.

I agree, most of what I've read/seen puts the 15-17's closer to 385-390 depending on the dyno used.

 

[Sean4m]

I would think 420-430

Thanks for the estimate, I was hoping I’d end up around 430-440. There is a video by vmp with a 2015 mustang gt comparing intake manifolds on the dyno. Their car with a cai,boss 302 intake manifold, and a full catless exhaust made 450. By no means do I think I’ll be 450whp. Also aren’t there some people with a intake and a cat back exhaust making 405-410 wheel? So wouldn’t it seem kind of low too be 420whp with long tubes and a intake manifold on top of that, only a 10hp increase? What’s my limiting factor for not making more power is it because I’m on stock injectors or are these dyno videos of Bolton’s kind of exaggerated? But I’m not a car expert by any means especially when it comes too power so I might be wrong and you can’t trust everything internet says .

 

[Sean4m]

Thanks for the estimate, I was hoping I’d end up around 430-440. There is a video by vmp with a 2015 mustang gt comparing intake manifolds on the dyno. Their car with a cai,boss 302 intake manifold, and a full catless exhaust made 450. By no means do I think I’ll be 450whp. Also aren’t there some people with a intake and a cat back exhaust making 405-410 wheel? So wouldn’t it seem kind of low too be 420whp with long tubes and a intake manifold on top of that, only a 10hp increase? What’s my limiting factor for not making more power is it because I’m on stock injectors or are these dyno videos of Bolton’s kind of exaggerated? But I’m not a car expert by any means especially when it comes too power so I might be wrong and you can’t trust everything internet says .

Vmp dyno results with different manifolds, full exhaust, and cai on 93 octane car was a 2015 Gt

 

[Chef jpd]

If you are looking to do an 18+ stock intake, I have one sitting in a box.
Off my 2020: airbox, hi flow filter, intake tube, and throttle body.

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