Roush Spark plugs ?

Reply Subscribe

Thread Tools

Search this Thread

01-18-2017, 12:54 PM

#11

Summers22

TOTM November 2019

iTrader: (2)

Join Date: Feb 2014

Posts: 23,804

Likes: 7,410

Received 11,598 Likes on 6,203 Posts

Yes, it amplifies voltage, up to around 200,000 volts per plug, resulting in 9.8hp per plug, so good guess rounding up!

Reply Like

01-19-2017, 12:47 AM

#12

Stewhoppy

Junior Member

Join Date: Dec 2016

Posts: 5

Likes: 4

Received 0 Likes on 0 Posts

Quote:

Originally Posted by techrep

Your stock 5.4 3v requires SP515 motorcraft plugs.. unless you have an 08 with up-dated heads then you will need SP509's

How do I know if my 08 has the up-dated heads...........?

Reply Like

01-19-2017, 01:53 AM

#13

Blue Blood

Lost in Time

Join Date: May 2011

Location: North Dallas Forty, OC California

Posts: 521

Likes: 270

Received 213 Likes on 98 Posts

Quote:

Originally Posted by Stewhoppy

How do I know if my 08 has the up-dated heads...........?

Production date stamp on driver side head, you're hoping it's Oct 9, 2007, or later. See this thread:
https://www.f150forum.com/f4/5-4l-3v...09-07-a-56871/

Reply Like

01-19-2017, 05:57 AM

#14

Mod (Ret.)

Moderator (Ret.)

Join Date: Sep 2008

Location: Lake Mary Florida

Posts: 9,460

Likes: 8

Received 474 Likes on 374 Posts

E3 is a good spark plug for a lawn mower or other small engine. Don't know how well they do with automotive though.

Reply Like

01-19-2017, 06:36 AM

#15

techrep

Mark

iTrader: (1)

Join Date: Jan 2009

Location: Va. Beach, VA.

Posts: 36,863

Likes: 1,084

Received 2,415 Likes on 2,116 Posts

Quote:

Originally Posted by Stewhoppy

How do I know if my 08 has the up-dated heads...........?

It will also have brown COP boots..

Reply Like

01-19-2017, 03:57 PM

#16

bubbabud

Senior Member

Join Date: Jul 2011

Location: Tonopah. AZ.

Posts: 3,380

Likes: 260

Received 502 Likes on 324 Posts

E3's great for your engine if you want to pay 3 times the price with no decernable increase in performance or mileage and in my case feed your engine small pieces of scrap metal as the ground electrode broke off and was digested by the engine [2001 Jeep 4.0]

Reply Like

02-02-2017, 08:36 PM

#17

ALTAJAVA

Senior Member

Join Date: Sep 2007

Location: Shenandoah Valley, Virginia

Posts: 151

Likes: 8

Received 8 Likes on 7 Posts

Quote:

Originally Posted by Summers22

I like when people try those ever magical plugs in our trucks. E3, Splitfire, Pulstar, Rouch......although, I have had good luck with the whirl-o-spark plugs on my lawn mowers:

I don't care if those were dyno proved at 9.8 hp boost per cylinder, there is no way in heck I'm gapping that on an 8 cylinder engine

Reply Like

02-03-2017, 12:28 PM

#18

F150Torqued

LightningRod

Join Date: Jan 2014

Location: San Antonio Texas

Posts: 2,412

Likes: 658

Received 643 Likes on 514 Posts

Quote:

Originally Posted by SCORGE

That little fan blade is what...10hp per plug?

Yea - till it comes off and rattles around on top the piston or gets caught in the exhaust valve seat and stamps an imprint of the valve head on the piston.