[boostkingMatt]

So, I was enlightened today by Adam at ZFG.

We are having some issues with spark plugs and gap, and spark blowout.

I had them gapped to .026 before, then went to .024 but that wasn’t enough.
Power was falling on its face at 4000 Rpms and up, and so Adam said to gap the plugs at .020

So this morning I did that and logged a pull later this evening and it pulled hard all the way to 6000 rpm, but as soon as it got up there it was hesitating and stumbling and then I heard pinging, not just once but a whole bunch. I immediately let out of it because I knew that sound, that was knock.

Mentioned all that to Adam and he said that it was not knock. He said on the ecoboosts it’s almost impossible to hear knock, it would have to pull 10+ degrees of timing for you to hear it.

The sound I heard was spark blowout. When the pressures in the cylinder are too high that the spark struggles or can’t cross the gap, and a tighter gap is needed.

“Spark blowout occurs when the spark plug fails to ignite the air-fuel mixture in the engine cylinder, often due to high compression or boost. It's not that the spark is literally "blown out," but rather that the spark is unable to form and jump across the gap due to the increased pressure and dielectric strength of the compressed gases.”

 

[GearHead_1]

Try the other plugs and see if the indexing helps with spark blowout.

 

[boostkingMatt]

Try the other plugs and see if the indexing helps with spark blowout.

I got spark blowout with those ones too, heard it on several different occasions. But I am going to try some new oem ones gapped tighter to like .020 and see what that does.

 

[Upshifter]

Try the other plugs and see if the indexing helps with spark blowout.

I got spark blowout with those ones too, heard it on several different occasions. But I am going to try some new oem ones gapped tighter to like .020 and see what that does.

Will be very curious to hear those results.

 

[boostkingMatt]

Will be very curious to hear those results.

You and me both. We are running a lot of boost, it hit near 27 the other day. 😬

 

[boostkingMatt]

Did sync update? This is a different style logo on my big screen. This is the first time I’ve ever seen it like that.

 

[Gord0]

Yeah, you got a new sync update

 

[Boatwaco]

Hey - you’ve also got a blank / unused button above that screen. Doesn’t that bug you?

 

[boostkingMatt]

Hey - you’ve also got a blank / unused button above that screen. Doesn’t that bug you?

No, it does not. Maybe I should make that be the nitrous button?

 

[Boatwaco]

No, it does not. Maybe I should make that be the nitrous button?

Here’s a list of ideas- https://www.f150ecoboost.net/posts/1456733/

 

[boostkingMatt]

Here’s a list of ideas- https://www.f150ecoboost.net/posts/1456733/

Hahaha, you should add “I need NOS” and then another should be the “scramble” button. Some people don’t know what scramble is in racing, if you know, you know.

 

[butthead]

Oh, oh,oh,oh, you mean SC Rambler saw plenty of these in the Kenosha AMC lot.

OK Matt what you are thinking is more in line with a "Transformer" switch?!?! KM

 

[GearHead_1]

Scramble buttons can be used for different things. You can increase timing, turn nitrous on or an extra kit, increase boost. Just depends on the setup you have.

 

[boostkingMatt]

Scramble buttons can be used for different things. You can increase timing, turn nitrous on or an extra kit, increase boost. Just depends on the setup you have.

Very true, usually on turbo cars it means boost is allowed to go higher than your tune allows. Would cool if one had a built motor and ran a conservative 750hp tune, then you could push the scramble button and have 1000

 

[GearHead_1]

I had a friend that had a Saleen Mustang with a Turbonetics turbo set up that had a box that you could mount in the vehicle in a convenient place. It had a dial on it that you could rotate and boost increase was almost instantaneous. That 5.0 liter would scream. For all intents and purposes, it was what has been described here.

 

[boostkingMatt]

So, I had my spark plugs gapped to .020 as you guys know and still got spark blowout. So, probably going to upgrade to the Granatelli Motorsport coil packs

 

[boostkingMatt]

I need y’all’s opinions.

Going to get Toyo Proxes ST3 tires but trying to figure out what size I should do.

I had 285/45/R20 on my old truck, those were 30.5” tall. I don’t really want to do 30” again because it definitely looked small in the wheel well.

I’m thinking 285/50/R20 - 31.3”
Or 305/50/R20 - 32”

im leaning 305s since they’ll be wider, 12.4” to be exact and would look better. They will still fit on a factory 8.5” wide wheel.

what do you guys think?

happy memorial day

 

[Boatwaco]

You need more width for a better launch, right? If so go with wider tires.

 

[Upshifter]

305s if think since you’re down the path of go big or go home.

Unless the weight penalty is huge.

I think they should fit on stock wheels, as 315s (10mm wider) fit on raptor wheels (10mm less positive offset), but nonetheless would do some research to insure that width clears the UCA on stock wheels.

 

[boostkingMatt]

305s if think since you’re down the path of go big or go home.

Unless the weight penalty is huge.

I think they should fit on stock wheels, as 315s (10mm wider) fit on raptor wheels (10mm less positive offset), but nonetheless would do some research to insure that width clears the UCA on stock wheels.

Hmmm, good point… I’m not sure. The weight difference between 305s and 285s is 3 lbs.