HO Engine Firing Order ?

tdf · July 11th, 2007, 09:11 AM

Am I correct in assuming that since the 5.0 HOs have a different firing order than the non-HO 5.0 engines, that the cams and cranks are non-noninterchangeable between the two?

HMUSN · July 11th, 2007, 09:51 AM

i'm not sure about the cams and cranks but yes there firing order is different.

I believe the HO has the same firing order as the 351

fogged306 · July 11th, 2007, 10:07 AM

I believe other than the firing order and the intake facing the other way, the cam is the only difference between the two.

tdf · July 12th, 2007, 02:21 PM

Consensus is that it is only the cam that is non-interchangeable.

radster87 · July 12th, 2007, 06:44 PM

The crank is interchangeable. the h.o. cam can be used in non h.o. and vise versa but you must change the position of the plugwires to match the cam.

zachpierce · January 3rd, 2010, 08:14 PM

the ho firing order is 1 3 7 2 6 5 4 8 counter clockwise from the #1 spot on the distributor cap. of course the #1 spark plug is the front spark plug on the passanger side when you are looking from the font of the engine. hope this helps.

July 11th, 2007, 09:51 AM	#2
HMUSN Doc 1986 SVO 48.47@ 12.58 Join Date: Nov 2006 Posts: 37,050 iTrader: 11 reviews	i'm not sure about the cams and cranks but yes there firing order is different. I believe the HO has the same firing order as the 351 __________________

July 12th, 2007, 02:21 PM	#4
tdf Newbie Join Date: May 2007 Posts: 43 iTrader: 0 reviews	CAM Consensus is that it is only the cam that is non-interchangeable.

July 12th, 2007, 06:44 PM	#5
radster87 Regular Join Date: Jul 2007 Location: Livingston, TN Posts: 158 iTrader: 0 reviews	The crank is interchangeable. the h.o. cam can be used in non h.o. and vise versa but you must change the position of the plugwires to match the cam. __________________ with this much horsepower it is hard to act maturely.

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July 11th, 2007, 09:11 AM	#1
tdf Newbie Join Date: May 2007 Posts: 43 iTrader: 0 reviews	HO Engine Firing Order ? Am I correct in assuming that since the 5.0 HOs have a different firing order than the non-HO 5.0 engines, that the cams and cranks are non-noninterchangeable between the two?

July 11th, 2007, 10:07 AM	#3
fogged306 MM Fanatic 89 GT Join Date: Apr 2007 Location: NY Posts: 4,875 iTrader: 2 reviews	I believe other than the firing order and the intake facing the other way, the cam is the only difference between the two.

January 3rd, 2010, 08:14 PM	#6
zachpierce Newbie Join Date: Dec 2009 Posts: 24 iTrader: 0 reviews	the ho firing order is 1 3 7 2 6 5 4 8 counter clockwise from the #1 spot on the distributor cap. of course the #1 spark plug is the front spark plug on the passanger side when you are looking from the font of the engine. hope this helps.

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HO Engine Firing Order ?

HO Engine Firing Order ?

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