Boss manifold going on

[DivineStrike]

Yea, it is yet to be seen what is better on a road course. I just haven't seen anything that promotes the boss to be better in any particular NA application. I'd be curious to know if the time was lost in first gear with the Boss on since that's where it is pretty weak. If it is the launch where it loses time then perhaps the Boss is better on a road course

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[mustang_guy]

It sucks waiting for new chassis results. Especially when they make nice changes to the heads. At least we will have answers eventually!

 

[DivineStrike]

Eventually lol, we still don't have weights on the Recaro vs Premium seats haha. car's been out almost a year now :shrug:

 

[mustang_guy]

Eventually lol, we still don't have weights on the Recaro vs Premium seats haha. car's been out almost a year now :shrug:

I noticed that. I was going get the recaros in a base gt when I order. I don't need that pp stuff. Wasted cash for my plans.

I was wondering what they weigh over/under the non recaro seats.

 

[dubster99]

At high RPM the stock 15 manifold doesn't come close to the Boss. They probably lost ET and MPH because the tune wasn't right to optimize the boss, and lost a little bit out of the hole due to the IMRC being gone. This has been freaking beaten to death in countless threads. Google search 2015 mustang gt boss intake and look at the test lund did for SVTP, and see how the power band changes...and that's even without tune optimization. The boss is FAR superior for road course.

 

[DivineStrike]

You can look at numbers all you want but bama did tune on the Boss manifold, they are the only ones to have tangible results when switching between the OEM and Boss manifold. Dyno numbers don't tell the whole story, you are just assuming it is better on the road course. I would be surprised if they lost that much ET and MPH in just 1st gear.


Assuming they didn't know what they were doing tuning the boss manifold while trying to get a best drag time is a fail on your part. I've seen the graph on SVTP, Boss loses a lot of low to midrange, high RPMS is nominally better...the main benefit is you can utilize about 5-600 more rpms per gear.

Not saying it's not better on track, I'm just saying you are assuming a lot. I think more testing will be necessary to come to a conclusion really

 

[Dustin GI]

Gents,
The manifold arrived today. I still need a few more parts but hopefully they will be in soon. Then I can provide one more example of the capabilities of the '15 with headers, cai, the boss and a tune.

 

[DivineStrike]

I noticed that. I was going get the recaros in a base gt when I order. I don't need that pp stuff. Wasted cash for my plans.

I was wondering what they weigh over/under the non recaro seats.

There's a chance the Recaro's can weigh a few lbs more than the stock seats. At least that was the case in the 11-14s. Probably due to the recaro's being built stiffer and better.

However, I don't think that will be the case this time as the base seats are powered. I think it would be safe to assume they weigh the same or maybe the recaro's save a few lbs. I wouldn't expect anything dramatic.

 

[dubster99]

You can look at numbers all you want but bama did tune on the Boss manifold, they are the only ones to have tangible results when switching between the OEM and Boss manifold. Dyno numbers don't tell the whole story, you are just assuming it is better on the road course. I would be surprised if they lost that much ET and MPH in just 1st gear.


Assuming they didn't know what they were doing tuning the boss manifold while trying to get a best drag time is a fail on your part. I've seen the graph on SVTP, Boss loses a lot of low to midrange, high RPMS is nominally better...the main benefit is you can utilize about 5-600 more rpms per gear.

Not saying it's not better on track, I'm just saying you are assuming a lot. I think more testing will be necessary to come to a conclusion really

I'm assuming? What am I assuming besides tune? You don't know what Bama did or didn't do to the tune either. If you look at the Lund test, you'd see how much more power it makes at high RPM. That = bueno for road course, does it not? That Lund test was without tuning to optimize the intake as well. I would say the power it makes above 6800 compared to stock is quite a bit more than "nominally better". For a street car, the stocker is probably better. A track car? Definitely the boss. No question.

 

[DivineStrike]

No I don't know what they did to the tune but they did tune it. And they are the only ones with an actual physical comparison that shows an actual performance difference. There is just not enough information out yet to come to the definitive conclusion you have come to. At least to the degree you are promoting. Without making gear swaps, it would depend on what track you are at which manifold would be better. More variables than just looking at a dyno graph.

 

[1320']

Question:

Why the Boss manifold and not the CJ setup?

 

[dubster99]

Cost. CJ requires throttle body and air intake, in addition to the manifold.

 

[09jsw]

Question:

Why the Boss manifold and not the CJ setup?

Cj is about 3x the cost to do on a 15 if not more.

 

[Blk2015GT]

There is just not enough information out yet to come to the definitive conclusion you have come to. At least to the degree you are promoting.

Agreed.

And one needs to differentiate what may add 10hp at 6,500-8,000 RPM in track situations vs average joe customer on the street who wants a little more power to the road.

Either way you cut it this is not a cost effective mod for joe mustang owner on the street who doesnt ever see RPMs over 6500 as that is where the Boss gains even start kicking in by the numbers themselves. Complete waste of $500+ Misinformation shouldn't be spread so that average joe here reads this thread and goes and buys this expecting any noticeable gains on the street.

 

[Walt1120]

Not good for a street only car regardless. Lose significant power under 6000 rpm in exchange for the power band staying flat from 6500-7800 for boss and 6500-8000+ for CJ. Neither of these intakes offer the same benefit as they would on an 11-14. On an 11-14 the car didnt really lose any power at lower rpms so it was a no brainer, on the 15 it does and this causes a dilemma. For the 3% of the time the average street driver will actually be taking advantage of the extended powerband, I agree its not worth it. Its also not like these are the only intakes that will ever exist for the new 5.0 either..

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