Spark Plug Torque setting difference between Ford / Whipple

[moncho]

In the middle of a Whipple install & looking to see if anyone has input on the following for the spark plug torque:

Ford manual states 13 ft/lbs.

Whipple install manual states 25 ft/lbs.

Huge difference between the 2 but it may be due to the increased boost of the S/C? I'll probably reach out to Whipple to verify, just wanted additional input.

Any insight would be appreciated.

Cheers,
Ray

EDIT: Whipple states it should be 14ft/lbs. They are making the change to their install manual. Still not exactly Ford's spec but very close.

 

[HillbillyHotRod]

Cannot see why it would be that high. Boost is boost no matter where it comes from. Doubling the torque I would think you would run the risk of stripping the threads.

 

[03 DSG Snake]

Stick with the Ford spec. Heads are aluminum.

 

[Snoopy49]

I would contact Whipple before I torqued them that high.

This is from a Whipple manual for a Camaro.
Remove all the stock sparkplugs & replace with a NGK Iridium IX TR7IX. Gap the sparkplug at .035". Torque the sparkplug to 11 foot pounds as per GM manual. NOTE: Apply a small amount of anti-seize on the threads.

 

[VNMOUS1]

Finger tight then 1/16th of a turn.

Done.

Sent from my SM-N950U using Tapatalk

 

[moncho]

I got all the info I needed from your responses.

I'll still be contacting Whipple, however the project needs to keep moving on.

Thanks much for the support!

Cheers,
Ray

 

[ZOMBEAST]

I probably change my plugs more often than most. I've used the Ford spec every time. Based on the effort required to remove them in some instances, and the fact that the heads are aluminum, no way would I torque them to 25 ft lbs.

For those that want to be safe, get yourself an inch/lb torque wrench. It's much more precise than a foot/lb wrench at lower ft/lb torque levels. I set mine to 156 inch/lbs (12 in/lbs = 1 ft/lb). JMO.

 

[Catmonkey]

The spark plug is not going to know or care what blower is bolted up top. Stick with factory specs on this one.

 

[moncho]

I went ahead and did the Ford spec @ 13 ft/lbs, although next time I’ll follow ZOMBEAST recommendation.

Moving along....

Thanks much & Cheers!

 

[Catmonkey]

A inch-pound torque wrench is a more suitable tool for any torque spec under 18 ft. lbs.

 

[moncho]

Been using an in/lb torque wrench thru out the install. Excellent advice on using it for under 18 ft/lbs spec.

Always appreciate your input Catmonkey!

Cheers!