2013' 5.0 cai q:

[mustangguy289]

I would agree, if only cars with tunes were breaking pistons. That's not the case. Yes a tune, with more aggressive fuel/spark/RPM, would exacerbate the issue, but that photo above shows that even a stock tune would do it.

Weren't all the pistons equal.... why was only#8 blowing on those cars? I thought I read somewhere that it was related to a cooling flow issue which made #8 run hotter than all other cylinders?

[RabidJackal]

I would agree, if only cars with tunes were breaking pistons. That's not the case. Yes a tune, with more aggressive fuel/spark/RPM, would exacerbate the issue, but that photo above shows that even a stock tune would do it.

I personally hadn't seen any stock motors grenade without something having been done to them. I'm not saying it's not possible, but all of the cases I read posts on were someone had gotten a canned tune, timing/knock sensors were not what they should be, and a BOOM-BITCH was a result.

Anybody running a CAI actually notice the Air Inlet temperature being reduced? When I veiw the air inlet temp on my gauges it is either the same as the ext air temp or 1-2 degrees warmer. A different CAI may produce more air flow.... but I doubt you are actually going to get any benefits of "colder" air entering the engine. I have also heard stories of these voiding warranties. So take them off before ever going to a dealership service dept. Of course, if you have ever put a tune on the car the engine warranty is out the door from what I understand.

Taking it off when you go to the dealer won't do anything. They can see if the PCM has been tuned or not with the car looking completely stock and the stock tune back in place.

Weren't all the pistons equal.... why was only#8 blowing on those cars? I thought I read somewhere that it was related to a cooling flow issue which made #8 run hotter than all other cylinders?

I too remember this being an issue that came up and was somewhat of a cause in some cars.

[DON SVO]

I would agree, if only cars with tunes were breaking pistons. That's not the case. Yes a tune, with more aggressive fuel/spark/RPM, would exacerbate the issue, but that photo above shows that even a stock tune would do it.

The issue is not whether casting flaws are failing pistons or the new block designs for better cooling to #4 and #8 alleviates it, but the can tunes were increasing the base spark and causing detonation at torque leak. Nothing more... just edgy tunes that exacerbate an issue.

[mustangguy289]

I

Taking it off when you go to the dealer won't do anything. They can see if the PCM has been tuned or not with the car looking completely stock and the stock tune back in place.



.

I was referring to just the CAI not a tune. Some CAI's say that a tune is not required. Once you tune your warranty is gone.

[dville_gt]

Anybody running a CAI actually notice the Air Inlet temperature being reduced? When I veiw the air inlet temp on my gauges it is either the same as the ext air temp or 1-2 degrees warmer.

i hope i'm reading this wrong. do you expect a "cold air intake" to cool the air below ambient? it's not a change of state cooler, it's a smoother inlet pipe and a fancy air filter.

[mustangguy289]

i hope i'm reading this wrong. do you expect a "cold air intake" to cool the air below ambient? it's not a change of state cooler, it's a smoother inlet pipe and a fancy air filter.

You are.....


I am saying a "cold" air intake is not going to help much as the stock design keeps the air at ambient or very close to it on these cars.

When CAI's first came around they were designed to draw air from somewhere farther from the engine (fender well, etc) so that the air would be cooler than the air drawn by the factory air box. Hence the name CAI. What I was saying is that you will not see any colder air ( or benefits of it) on these cars and that the only benefit may be an increase in air flow.

[talisman]

I personally hadn't seen any stock motors grenade without something having been done to them. I'm not saying it's not possible, but all of the cases I read posts on were someone had gotten a canned tune, timing/knock sensors were not what they should be, and a BOOM-BITCH was a result.

Now you have.

[46Tbird]

Nothing more... just edgy tunes that exacerbate an issue.

That doesn't explain MY car -the one that I know 100% of its history. It's never been tuned. I'm getting kinda sick of the sideways look from people when I tell them that fact.

It also doesn't explain why the Grapevine Ford technician I spoke to said it was "about the 12th" completely stock car he was swapping engines in because of #8 pistons. It also doesn't explain why Ford has been warrantying '11-12 engines even when they are tuned.

Clearly there is some abnormality going on around that cylinder in all these engines, but they seem to have quietly addressed the issues (or the running piston changes are a suitable fix) and are replacing early coyotes as-required during the remaining warranty period.

IMO some people got stuck paying for a defect when their warranty was denied, but that's exactly the reason I never did anything to mine in the first place and I'm glad I didn't.

[kanetrain]

I have the JLT CAI and have had a couple different tunes on the car, I've never had a problem with the CAI in particular, but I don't think I experienced any gains worth talking about, either. I just like the whistle sound it makes.

[DON SVO]

That doesn't explain MY car -the one that I know 100% of its history. It's never been tuned. I'm getting kinda sick of the sideways look from people when I tell them that fact.

Yes it does. That's why I said:

... edgy tunes that exacerbate an issue.

The issue being:

... casting flaws are failing pistons or the new block designs for better cooling to #4 and #8

You're getting wound up over me agreeing with you.

[46Tbird]

Gotcha. Your awkwardly worded post threw me off.

[DON SVO]

Gotcha. Your awkwardly worded post threw me off.

If it makes you feel any better, my old car is making 655rwhp on the stock bottom end... For the past year.

[BlackGT]

I have the Steeda CAI, but as stated before it requires a tune. Car won't even idle with Steeda CAI and factory tune, so I can't tell you if you will gain anything by getting a CAI after you already had car tuned. But you will have to get it Re-Tuned if you install the JLT...

I do like the big breathing noise that sounds like it's going to swallow the car next to me when I give it a little gas...

[46Tbird]

If it makes you feel any better, my old car is making 655rwhp on the stock bottom end... For the past year.

Cool. One dyno run and parked in the garage? Haven't seen any updates on it... for the past year.

[Mysticcobrakilla]

Cool. One dyno run and parked in the garage? Haven't seen any updates on it... for the past year.

Because he sold it to dr. Dave maybe?