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High Km Port and Polish 

 

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 Post subject: High Km Port and Polish
Posted: Wed Oct 18, 2006 4:53 pm 
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Hi guys,

I have a 97 EL 6 cylinder with about 260 000 km on it.
I got a friend of a friend who can port and polish it and shave the head a bit.

I wanted to change to the AU metal head gasket any way because its still on the original.
Just wondering if its ok to get the head done and just change the head gasket. Or should I change rings, pistons etc.

Also he asked what 'cc' I want for the porting, because it would help him a lot.
Just wondering what people would recomend, seeing as i want to put in a cam later on.

Cheers.
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Posted: Wed Oct 18, 2006 5:48 pm 
Getting Side Ways
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I'm looking for someone to port and polish the head in my car for cash at some stage.. would your mate be interested?
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 Post subject: Re: High Km Port and Polish
Posted: Wed Oct 18, 2006 9:12 pm 
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EggHead wrote:
Hi guys,

I have a 97 EL 6 cylinder with about 260 000 km on it.
I got a friend of a friend who can port and polish it and shave the head a bit.

I wanted to change to the AU metal head gasket any way because its still on the original.
Just wondering if its ok to get the head done and just change the head gasket. Or should I change rings, pistons etc.

Also he asked what 'cc' I want for the porting, because it would help him a lot.
Just wondering what people would recomend, seeing as i want to put in a cam later on.

Cheers.

Just do a clean up of the ports & just polish the exhaust ports only, don't go overboard with it. you'll just end up losing intake air velocity.

Cc = {cubic centimeter} its use to measure the volume of the combustion chambers & most time the ports as well. making sure that all the chambers have equal amount of volume by using liquid.

 

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Posted: Wed Oct 18, 2006 10:59 pm 
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Nice said slick.
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Posted: Wed Oct 18, 2006 11:13 pm 
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260,000kms a still on its original head gasket? Thats got to be some kind of record for a Eseries ford doesnt it?

 

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Posted: Thu Oct 19, 2006 2:27 am 
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porting it without fitting a cam to utilise it will make it go backwards. the volume is unchanged but the path is increased which as slick said slow the velocity down.

at 260,000kms the bottom end of the engine couldnt be that strong anymore. if u do up the top end it'll put pressure on the bottom end so i reckon it'd be a good idea to slap a set of rings in there while u got it apart

 

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 Post subject: Re: High Km Port and Polish
Posted: Thu Oct 19, 2006 2:38 am 
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EggHead wrote:
Hi guys,

I have a 97 EL 6 cylinder with about 260 000 km on it.
I got a friend of a friend who can port and polish it and shave the head a bit.

I wanted to change to the AU metal head gasket any way because its still on the original.
Just wondering if its ok to get the head done and just change the head gasket. Or should I change rings, pistons etc.

Also he asked what 'cc' I want for the porting, because it would help him a lot.
Just wondering what people would recomend, seeing as i want to put in a cam later on.

Cheers.
measure the ccs of the combustion cambers when the head is off-each one and record the size-this will give you your std compression ratio 9-1 or what ever or it mayhave been shaved before,calculate the total area-piston bore-total stroke in motor not book,as your deck height may be different from front to back of block and your pistons may be short on stroke-needs checking-add gasket-add heaad volume=total total area div.by head ccs equals comp ratio when shaving head try to calculate the volume in ccs you take off the head,eg.-.25mm or .10th equals--ccs this will raise compression and dependind on your fuel may be a problem. 92 oct---8.5 to9.1 to 1 98oct----10to10.2 to 1 getting border line to 100oct 100oct--10.5 and up mind you lpg loves 10.2---10.5 to 1 i have 4 motors running it. the intake-exh. runners depending on fuel used and cam an be ported to suit,you dont state either, so its wide open, you have to be more specific,this will help in porting.

 

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Posted: Thu Oct 19, 2006 2:27 pm 
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Thanks for the reply's guys.

For the rings, they need the engine to be pulled completely apart right?

If you up the compression, doesnt that increase the efficiency so counter act the negative side of the increased path? ie. allowing me to wait a bit for a cam without making things worst.

Thanks for the clarification hans, was kinda hoping for a no brainer straight forward number :P hahahaa ignorance :D

AdamN: He can only do it at his work, so he said theres only some times which he could do it. I will ask him next time I see him and I might be able to get a more definitive answer for you.

Cheers
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Posted: Thu Oct 19, 2006 9:18 pm 
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MooseMan wrote:
260,000kms a still on its original head gasket? Thats got to be some kind of record for a Eseries ford doesnt it?


naa unchels EA had close to 400 000 befor he sold it, never even had the tappet cover off

 

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Posted: Fri Oct 20, 2006 1:00 am 
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voids wrote:
MooseMan wrote:
260,000kms a still on its original head gasket? Thats got to be some kind of record for a Eseries ford doesnt it?


naa unchels EA had close to 400 000 befor he sold it, never even had the tappet cover off
my eb has 330,000 on the clock has only just done the head gasket still driving it though coolant running down the right hand side of the block :D
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