difference between the 5.0 and the 5.0-HO

I candy

Founding Member

May 9, 2001

597

1

18

Honolulu

Jun 22, 2004

#1

• Jun 22, 2004

• #1

i did a search and came up blank

http://forums.stangnet.com/search.php?searchid=437985

see i searched

so what are the difference. i came upon another thread that stated some parts can make 400hp but i wanna know if i got the same engine. or what is so different about them.

thanks in advance.

 

88stangmangt

Active Member

Nov 25, 2003

2,332

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48

Stafford,VA

Jun 22, 2004

#2

• Jun 22, 2004

• #2

bigger heads,cam and different firing order i believe between the H.O. and just the reg.=more hp.................... 400 hp could be achieved but you would have to put on some big heads and a nice cam and still without strokeing it you would prob need a power adder.

 

B

Boss 351

Here sthhhhhhhheeeve take a picthh of my man flowe

Jul 13, 2003

2,433

23

48

Canada

Jun 22, 2004

#3

• Jun 22, 2004

• #3

Let's see...

upper intake
upper intake cover plate
firing order (HO is same as 351W)
truck heads
forged internals (I think)

I think the computer is different and so is the wire harness but I'm not sure... If you take a look at my 1987 truck engine non HO 5.0 has about 140HP and an 1989 HO 5.0 has 225HP but the torque ratings might be the same.... honestly I don't know

 

S

Shelby Cobra

New Member

Jun 15, 2004

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0

Jun 22, 2004

#4

• Jun 22, 2004

• #4

THIS ARTICLE says "As delivered, the 5.0L H.O. engine installed in '87-'92 Mustangs was quite the little hot rod motor, with forged TRW pistons, a hydraulic-roller camshaft, and a double-roller timing chain--all stock"

It also says you can make 400hp with the stock short block.

 

8

89redgt

New Member

Jul 17, 2003

2

0

1

Cincinnati, OH

Jun 22, 2004

#5

• Jun 22, 2004

• #5

fireing order

Quick question

I have a 5.0 non HO motor and want to build it to put it into my car. My question is about the fireing order I know it is different between the HO and the non HO motors. But to use the non HO motor in my car all I have to do is change the cam right to get the correct fireing order. From what I understand the crank is the same.

Thanks for the help.

 

larrendeuce

Member

Sep 13, 2003

649

1

19

Southern NJ

Jun 22, 2004

#6

• Jun 22, 2004

• #6

Since the SO 5.0 has flattop cast pistons and the e6 heads if you change the cam and heads you might run into piston to valve clearance problems. Also its not a roller block so you'd either have to switch it over to a roller cam or use a flat tappet cam.

 

8

87'GTstang

New Member

Feb 16, 2004

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0

Jun 22, 2004

#7

• Jun 22, 2004

• #7

Boss 351 said:

Let's see...

upper intake
upper intake cover plate
firing order (HO is same as 351W)
truck heads
forged internals (I think)

I think the computer is different and so is the wire harness but I'm not sure... If you take a look at my 1987 truck engine non HO 5.0 has about 140HP and an 1989 HO 5.0 has 225HP but the torque ratings might be the same.... honestly I don't know

Click to expand...

285 ft/lbs. versus 300 ft/lbs.

 

Euphoric306

New Member

Apr 5, 2004

905

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0

Jun 22, 2004

#8

• Jun 22, 2004

• #8

does this mean that when i looked up specs for my 84 5.0 HO lx and saw 165bhp for the 84 5.0 non-HO engine, that my car should have a bit more power than that? also, the torque for non-HO was 210 ft-lbs if im not mistaken, thanks

 

dastang2

Active Member

Dec 11, 2003

2,020

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46

tx

Jun 22, 2004

#9

• Jun 22, 2004

• #9

i had a 90 model f150 with the 5.0. that is the base motor i used on my rebuild(check my sig). it had efi but not mass air. the block is a roller ready block since it has the 2 threaded holes in the lifter valley for the spider bars, but it was not equipped with a roller cam. it had E7 heads which i had a 3 angle valve job on and reused. also the firing order was right on the intake and it was the same as the 351 but it was not the HO motor and it was a 5.0 since the upper intake said so. all that changes the firing order is the cam and the cranks are the same up to 86 or so, then they became a 1 piece rear main seal.

 

88stangmangt

Active Member

Nov 25, 2003

2,332

1

48

Stafford,VA

Jun 22, 2004

#10

• Jun 22, 2004

• #10

Shelby Cobra said:

THIS ARTICLE
It also says you can make 400hp with the stock short block.

Click to expand...

I have seen more check back with me next spring and you will see what your stock 302 can do.............

 

94_Teal_GT

Founding Member

Aug 14, 2002

405

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0

Palm Bay, FL

Jun 22, 2004

#11

• Jun 22, 2004

• #11

Here's a thread all about the differences. I'm too lazy to retype them all
http://forums.stangnet.com/showthread.php?t=472432