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ford ef, ring gap placement 

 

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 Post subject: ford ef, ring gap placement
Posted: Mon Nov 22, 2010 8:54 pm 
Getting Side Ways
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Ride: Ford EF - Garret TO4Z

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hi just about to install my pistons and the maxellerys and gregorys are not exactally explanitive enough anybody got a pic

 

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Crank Assembly balanced, HV oil pump, ACL Trimetal bearings, "1 extra oil clearance taking to around 0.0650-0.0700 on mains and big ends, Moly rings,, Xr6 Cam, POD ( Possibly oversize injectors), Block, Head, Timing cover, belt idler, Alternator,painted in ford light blue

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 Post subject: Re: ford ef, ring gap placement
Posted: Mon Nov 22, 2010 10:33 pm 
Getting Side Ways
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don't place any gap on the major thrust side. just stagger them at 45degree from parallel with the piston pin. and have the second ring gap 180deg from the top ring gap.



0.0045" per in of bore for the top ring and 0.0055" per inch of bore for the second ring.
Oil rings min of 10thou.

Stock I6 bore 3.631" = 16 thou top ring and 19 thou second ring.


Unless you're building a turbo or nitrous engine engine. in which case i'd go 18thou and 21thou

 

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 Post subject: Re: ford ef, ring gap placement
Posted: Wed Nov 24, 2010 11:05 am 
Getting Side Ways
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Location: Hobart
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my machinest said 16 top 14 second????? already in there head bolted down,

once ive ran it in i was planning on putting the turbo back on once ive saved up for it,

can i run the engine without forced induction with the ring specs for blown, nos gaps

 

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Crank Assembly balanced, HV oil pump, ACL Trimetal bearings, "1 extra oil clearance taking to around 0.0650-0.0700 on mains and big ends, Moly rings,, Xr6 Cam, POD ( Possibly oversize injectors), Block, Head, Timing cover, belt idler, Alternator,painted in ford light blue

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 Post subject: Re: ford ef, ring gap placement
Posted: Wed Nov 24, 2010 6:06 pm 
Getting Side Ways
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You always want the second ring to have a larger end gap. Other wise you run risk of pressure build up under the top ring which will result in ring flutter and power loss.
This problem is made worse with boost or nitrous.


Yeah you can run wider gaps with out boost, it's just not optimal.

 

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 Post subject: Re: ford ef, ring gap placement
Posted: Thu Nov 25, 2010 1:44 pm 
Getting Side Ways
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Age: 27

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Joined: 18th Feb 2010

Ride: Ford EF - Garret TO4Z

Location: Hobart
TAS, Australia

well ill have to take the head back off then,, new head bolts are on there way, the mls head gasket can be reused cant it as long as it hasant seen much work?????

 

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Crank Assembly balanced, HV oil pump, ACL Trimetal bearings, "1 extra oil clearance taking to around 0.0650-0.0700 on mains and big ends, Moly rings,, Xr6 Cam, POD ( Possibly oversize injectors), Block, Head, Timing cover, belt idler, Alternator,painted in ford light blue

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 Post subject: Re: ford ef, ring gap placement
Posted: Sat Dec 11, 2010 12:25 pm 
Oompa Loompa
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Joined: 31st Mar 2007

Location: renmark
SA, Australia

Shifteh wrote:
hi just about to install my pistons and the maxellerys and gregorys are not exactally explanitive enough anybody got a pic



umm the rings you gotg should tell you where to place the ring gaps, if they dont , they must be some real el cheapo rings ??? out of all the engines i rebuilt, i`ve never come across rings that didnt have instructions on how to install them.
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