Some dumb questions about the new 5.0's

[BERT]

The gains have pretty much always come from the tune, and not the CAI. Some are better than others (Air Raid seems to be the power making leader at this time for the 5.0). The stock air box, and the stock headers/cats are amazingly efficient on these cars, and unless you're wringing the last hp out of one, changing either one is simply not needed. I ran axlebacks and a canned tune from VMP on my car at MIR 2 years ago, and with nothing else other than a set of 275/60 DR's, went 12 flat at 116. The stock stuff is pretty good.

Good to hear

[BERT]

I thought Ford stopped denying warranty coverage for tunes after they figured out the cylinder problem in the 11-12s that was causing engine failure? I'd still probably wait for the warranty to be up anyway, but that's just me.

I'm with you. Just not worth it. Getting shit fixed free sounds a lot better to me (didn't mean to rhyme)

[46Tbird]

I thought Ford stopped denying warranty coverage for tunes after they figured out the cylinder problem in the 11-12s that was causing engine failure? I'd still probably wait for the warranty to be up anyway, but that's just me.

I am aware of at least one engine replaced on a car that Ford knew was tuned (not mine). But all it takes is talking in the wrong tone to a service writer and you're screwed. I'd rather not chance it.

My car has been 12.2 @ 114.5 without a tune, without a CAI, and slammed on 20s. I'll just wait until it's out of drivetrain warranty (80k miles) before I do anything to it.

[talisman]

I am aware of at least one engine replaced on a car that Ford knew was tuned (not mine). But all it takes is talking in the wrong tone to a service writer and you're screwed. I'd rather not chance it.

haha, true dat. In police circles, it's known as being guilty of "Having a bad attitude."

[Whiteboy]

It's primarily a cost to benefit reasoning. A tune will help get the most out of a filter, but being that airflow isn't changed all that much, the benefit is minimal. On the other hand, since the airflow isn't changed much, the stock computer can still appropriately calculate the values.

You don't have to tune a CAI, but the benefit is far better, thus being more worth it.

Says the guy that doesnt know about 5.0 mustangs!

[slow99]

Says the guy that doesnt know about 5.0 mustangs!

Lmao, no shit.

[BERT]

The gains have pretty much always come from the tune, and not the CAI. Some are better than others (Air Raid seems to be the power making leader at this time for the 5.0). The stock air box, and the stock headers/cats are amazingly efficient on these cars, and unless you're wringing the last hp out of one, changing either one is simply not needed. I ran axlebacks and a canned tune from VMP on my car at MIR 2 years ago, and with nothing else other than a set of 275/60 DR's, went 12 flat at 116. The stock stuff is pretty good.

Just curious, how big are the headers on these cars?

[46Tbird]

Bert, here's a really good article about the coyote engines.

http://www.mustang50magazine.com/techarticles/m5lp_1003_2011_ford_mustang_gt_50_coyote_engine/viewall.html

They don't mention how "big" the exhaust manifolds are, but they do explain some of the design reasons behind why the stockers work so well. If you're thinking about headers, ask some people that run them what they think about the cost benefit.

[BERT]

Bert, here's a really good article about the coyote engines.

http://www.mustang50magazine.com/techarticles/m5lp_1003_2011_ford_mustang_gt_50_coyote_engine/viewall.html

They don't mention how "big" the exhaust manifolds are, but they do explain some of the design reasons behind why the stockers work so well. If you're thinking about headers, ask some people that run them what they think about the cost benefit.

Cool. I'm not, just asking questions. I know jack shit about these cars. Never paid any attention to what they do or what all is on them until now. So it's like i'm 18 all over again when I first got my '89 coupe

[46Tbird]

That was a long time ago, bert89coupe.

[BERT]

That was a long time ago, bert89coupe.

yes it was, Danny. How nice of you to remind me

[Rick Modena]

All of Danny's info is spot on. The K&N's do not give any power and they do lose some, I'm assuming it requires a tune. I put one in and went back to the paper filter. I run 87 octane only, I've read the manual front to back and I don't see any reason to run 93. With that being said it does run better with 93 but it is my DD so I'm rarely getting on it.
So far from a roll I've beat a 2013 Subi WRX, BMW 335i tt and last Saturday I got the jump on a Vette (not a 2014) on 121 and he never passed me up to 130mph.
These cars will get up and move, I only have the GT500 AB on mine.

[BERT]

So I should save my money and not put the K&N on the car that I bought last night?


and thanks for that article, Danny, I enjoyed reading that.

[Rick Modena]

So I should save my money and not put the K&N on the car that I bought last night?


and thanks for that article, Danny, I enjoyed reading that.

Nope, I went out and put one in (it was like $60.00 too) and took it back out in a month or so. I could tell the car wasn't running right. I put in the factory paper filter back in and could tell right away it was running better. Ford has squeezed every single ounce of power from the Coyote 4v in stock form, no need for anything unless you are going to do a CAI with a tune.
My car only has the GT500 AB and the aluminum driveshaft is next. Once it goes out of warranty I'll be putting in a throttle body, CAI and tune. Should be enough until I save enough for a KB 2.8 LC blower...

[BERT]

Nope, I went out and put one in (it was like $60.00 too) and took it back out in a month or so. I could tell the car wasn't running right. I put in the factory paper filter back in and could tell right away it was running better. Ford has squeezed every single ounce of power from the Coyote 4v in stock form, no need for anything unless you are going to do a CAI with a tune.
My car only has the GT500 AB and the aluminum driveshaft is next. Once it goes out of warranty I'll be putting in a throttle body, CAI and tune. Should be enough until I save enough for a KB 2.8 LC blower...

hmm, might be getting my money back then and use that towards the axle back