aclass

I'm always a little slow to catch on but I'm starting to think that what I initially thought, isnt what I thought I thought....
When punching the car in first gear I was thinking that I was uncontrollably getting into the rev limiter b/c of breaking traction but now that it's warm and my windows are down I'm thinking it's suffering spark blowout way before the limiter.
Sounds like a ballon popping and the car loses power.

The modding never ends......reckon I need to read the coil pack threads.

gloryboy

What are your plugs gapped at? The stock cops are actually very good. If your getting spark blowout, you can gap them a little closer.Not sure how much boost u r runnning, but at10 lbs.032 seems to work well.

blueherd02gt

Get some accel COP's... I thank moose for recommending these babies because they allow you to get better spark efficiancy and reduce spark blowout...

Diabolical!

I run the new Granatelli COPs. I considered all of the brands, but Granatelli is the only company that advertises the voltage of their COPs. I e-mailed the other companies to inquire the voltage of their designs, but half of them never responded and the ones that did would only say that their design was an improvement over stock. I really hoped to hear specific numbers from MSD on their coils because I've had great success with their products in the past with my 5.0, but they were never specific about what to expect from their coils.

moosestang

Whipple gaps theirs to .032, but I was still hearing popping coming from my exhaust. The accel coil packs cleared it right up. I wouldn't recommend gapping them down any more than that. If you close the gap to much it can lead to other problems. I'd personally like to try the weapon x coils when they come out with a new set of plugs set at the stock gap.

ebr

What kind of problems does it cause if the plugs are gapped to tight for your setup?

zkiller

I run the GMS COPs they are really good.
You can gap down to .028 actually.

moosestang

I haven't personally read anything on new mustangs, but it can cause anything from rough idle to power loss. With your power, you probably wouldn't notice.

Gapping down the plugs for FI is really just a quick and dirty fix for an ignition system that wasn't designed for the increased pressure (just my opinion). The bigger the gap, the more powerful the spark will be. That's assuming the system has the power to jump the gap. The smaller the gap, the weaker the spark. Of course if your gap is to great, the coils will be working overtime and fail sooner, maybe.

ebr

Thanks Moose.

Z06 Killer

I myself am waiting for the end all be all for the COPs as I too sometimes get spark blowout, even at .034 gap.[:@]