Fox Engine Build Issues-stroker Clearancing

M

MoneyPitFox

15 Year Member

Jan 20, 2014

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Dec 23, 2015

#1

• Dec 23, 2015

• #1

Hey guys,

Looking for some advice. Bought a motor from a guy who said he had it all setup but not assmebled.

So bearing clearances, rings, balance are all done.

My issue is that the counterweight is hitting the bottom of the piston before BDC. Before I take it to the machine shop do you think this can be fixed or am I going to be looking for at a minimum a new crank/rods?

 

RangerJoe

I leave the horn on while driving

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Dec 23, 2015

#2

• Dec 23, 2015

• #2

That should not happen. What size stroker is it? What size rods and what piston?

Sounds like you may have got scammed.

Joe

 

M

MoneyPitFox

15 Year Member

Jan 20, 2014

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Dec 24, 2015

#3

• Dec 24, 2015

• #3

RangerJoe said:

That should not happen. What size stroker is it? What size rods and what piston?

Sounds like you may have got scammed.

Joe

Click to expand...

347, Have to look up everything else.

Machine shop has the record of the work done and all the parts are marked.

Guy didn't pay to have it checked for rotating clearance. FML

 

RangerJoe

I leave the horn on while driving

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Dec 24, 2015

#4

• Dec 24, 2015

• #4

I can't believe the piston is making contact with the crank. A 347 is such a common build that I can't see that being an issue on any quality kit.

Joe

 

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mikestang63

SN Certified Technician

Aug 27, 2012

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Dec 24, 2015

#5

• Dec 24, 2015

• #5

uh what size rods?

 

jrichker

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Dec 27, 2015

#6

• Dec 27, 2015

• #6

The most common problem is that the con rod bolts hit the bottom edges of the cylinder bores on 347 stroker engines.
The 347 uses a piston with a very short skirt, what some people might call a slipper piston.

See Ford 347 Stroker Engine Build - Muscle Mustangs and Fast Fords Magazine for a very good article on how to build a 347 stroker engine. There are lots of pictures, including clearancing the block and rod bolt problem.

 

Last edited: Dec 27, 2015

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