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Old 07-09-2007, 04:53 PM   #1
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Powerworks, Compression and the ATX

The current engine/exhaust mods I have are:

Pipercross Intake
70mm MAF
65mm TB
2000 IM
FR Head (.040)
FR2 cams
Fidanza cam gears
SCT chip (dyno tuned)
SVT header
ORP
2.5"exhaust

I have reached the point where I believe I may jump into the world of FI. Mine is an 03 Zetec ATX and the problem is I'm not 100% sure what will go and what will stay along with will it work without any other major modifications. I would like not to have to get into any tranny upgrades right now which is why the PW for the auto caught my eye (originally I was thinking JRSC) I would imagine the the Pipercross and 2000 IM would go but will I use the 70mm MAF and 65mm TB with the Powerworks? Will the decked FR head be OK at 10.5:1 compression? If not can it be made safe with a thicker head gasket? What about injectors?
What about internals...rods, pistons, etc.?
As you can see I know little about FI and the Powerworks SC so any help or input an the best direction to take considering my current mods would be appreciated. Input from those with an ATX and already running the PW would be especially appreciated.


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Old 07-09-2007, 07:02 PM   #2
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The PW/ATX kit is designed for the ATX. The PW comes with a BBK 65mm tb, You can get a SVT head gasket (thicker) to off-set the decking. The PW was designed to work with a bone stock Zetec, as far as all your other mods—you might want to contact PW as to how all these mods will affect for warranty.
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Old 07-12-2007, 09:45 AM   #3
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I had the JRSC ported and a modified bbk running 12psi on my ported head running 0.030" resurfaced head, w/ FR2 cams, FC Tb, I/H/E (2.5")

I made 180whp/160wtq, the car drove fine for about 2 months, then the head gasket went and fried the block.

Granted powerworks is intercooled so you'll have slightly better luck but I'must letting you know the risk is real and if I were you I'd put in a thicker head gasket. It's better to be extra safe in the beginning than having to rebuild your short block like I did.

As far as the ATX, when you hammer it, your torque converter may have some problems getting you from 1st to 2nd. idk why but this happened to me on both atx focuses I've owned. Just making you aware of what might happen.

I've since had the tranny completely overhauled
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