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| tickford_6 |
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Posts: 6449 Joined: 11th Nov 2004 |
{USERNAME} wrote: Wellthat looks easy, cheers for that, I'll be into soon as I need to take off the head.
 rememeber to take it slow, and to let us know how it all goes |
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| garts_co |
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Quote: "yeah like that pick. but start with a clean head. grab an AU gasket and use it to mark out the head so you know where not to grind. can you take metal away all the way to the edge of where the gasket seals ? (or close anyway?)or is there a water jacket in there, there seems to be heaps of metal in there that could be taken out . how much does jmm take out on there turbo heads ??????? just about to start on my combustion chamber too, after some research of course |
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| ReGiE |
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wow this has to be one of the biggest thread revivals here.. dude this thread is 5 years old
_________________ Gooooone - Eb2 Coon - 143RWKW |
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| garts_co |
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{USERNAME} wrote: wow this has to be one of the biggest thread revivals here.. dude this thread is 5 years old sorry bout the 5yr old thread ... didnt realise  . i was doing some searches about the combustion chamber modding to lower compression for forced induction.. and i couldn't find out how much you can take out of the head .ps didnt want to s**t you guys off by starting a new thread in the wrong place like all the other newbies 
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| Krytox |
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Least you brought your own shovel!
_________________ Carefree, we may not be number one, but we're up there. |
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| phongus |
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{USERNAME} wrote: {USERNAME} wrote: wow this has to be one of the biggest thread revivals here.. dude this thread is 5 years old sorry bout the 5yr old thread ... didnt realise . i was doing some searches about the combustion chamber modding to lower compression for forced induction.. and i couldn't find out how much you can take out of the head .ps didnt want to s**t you guys off by starting a new thread in the wrong place like all the other newbies Sorry I can't help you out with your dilemma and question...but good on you for refering to older threads rather than starting a new one .
_________________ phongus = Post whore 2006 |
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| maddog |
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You can take out alot from those areas. I drilled them to see how much meat there was and IMO there is heaps. I did what JMM did on the spark plug side but also took out heaps around the exhaust valve on the shrouded side.
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| tickford_6 |
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Posts: 6449 Joined: 11th Nov 2004 |
{USERNAME} wrote: Quote: "yeah like that pick. but start with a clean head. grab an AU gasket and use it to mark out the head so you know where not to grind. can you take metal away all the way to the edge of where the gasket seals ? (or close anyway?)or is there a water jacket in there, there seems to be heaps of metal in there that could be taken out . how much does jmm take out on there turbo heads ??????? just about to start on my combustion chamber too, after some research of course Bringing up this old thread IS BETTER then starting a new one. keeps all the info in one thread. You can go to the gasket line. but if you don't have a steady hand it's easy to make a mistake and go to far. read all of this thread to see how much metal is behind it. lots of pics!!! ford-4l-and-6-cylinder-f1/possible-head-porting-docco-coming-soon-t86312.html |
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| BEAR80 |
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Age: 44 Posts: 683 Joined: 4th Mar 2010 Ride: BF Fairmont Ghia & TS Magna Location: central coast |
{USERNAME} wrote: {USERNAME} wrote: Quote: "yeah like that pick. but start with a clean head. grab an AU gasket and use it to mark out the head so you know where not to grind. can you take metal away all the way to the edge of where the gasket seals ? (or close anyway?)or is there a water jacket in there, there seems to be heaps of metal in there that could be taken out . how much does jmm take out on there turbo heads ??????? just about to start on my combustion chamber too, after some research of course Bringing up this old thread IS BETTER then starting a new one. keeps all the info in one thread. You can go to the gasket line. but if you don't have a steady hand it's easy to make a mistake and go to far. read all of this thread to see how much metal is behind it. lots of pics!!! ford-4l-and-6-cylinder-f1/possible-head-porting-docco-coming-soon-t86312.html hmmmmm might have to give the dremel a bit of a workout, do i need a steel bur or stone??? and yes its a thread mine LOL cheers bear |
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| KWIKXR |
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{USERNAME} wrote: hmmmmm might have to give the dremel a bit of a workout, do i need a steel bur or stone??? Steel bur would make it a hell of a lot easier, it cuts through the alloy quickly so you just have to be aware of how much you're taking out. When i did some chamber work on my spare head, i used a stone to be safe, but it took fricken ages 
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| BEAR80 |
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Age: 44 Posts: 683 Joined: 4th Mar 2010 Ride: BF Fairmont Ghia & TS Magna Location: central coast |
{USERNAME} wrote: {USERNAME} wrote: hmmmmm might have to give the dremel a bit of a workout, do i need a steel bur or stone??? Steel bur would make it a hell of a lot easier, it cuts through the alloy quickly so you just have to be aware of how much you're taking out. When i did some chamber work on my spare head, i used a stone to be safe, but it took fricken ages sweet well i have plenty of time thanx for the info cheers bear |
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| hans hartman |
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{USERNAME} wrote: {USERNAME} wrote: {USERNAME} wrote: hmmmmm might have to give the dremel a bit of a workout, do i need a steel bur or stone??? Steel bur would make it a hell of a lot easier, it cuts through the alloy quickly so you just have to be aware of how much you're taking out. When i did some chamber work on my spare head, i used a stone to be safe, but it took fricken ages sweet well i have plenty of time thanx for the info cheers bear go to the vets and get a 20cc syringe,or if your lucky medical 50cc in hospitals,to measure with.
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| WagonDad |
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AU metal gaskets are 20" compressed standard E series gaskets are 40", double the thickness, wouldnt going to one good quality gasket like a ACL race gasket acheive the same thing, the difference in the compression ratio between the 20" and 40" gaskets is .4.
Before you start removing material from the chamber read up on quench/squish, de shroud the valves and remove material from inside the chamber but try not to enlarge the original outer shape of the chamber. Research,research,research.
_________________ 4.0L EF Fairmont Station Wagon. EL GT Snorkel. K&N Pod in air box. 3" Intake piping.
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| hans hartman |
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{USERNAME} wrote: AU metal gaskets are 20" compressed standard E series gaskets are 40", double the thickness, wouldnt going to one good quality gasket like a ACL race gasket acheive the same thing, the difference in the compression ratio between the 20" and 40" gaskets is .4. Before you start removing material from the chamber read up on quench/squish, de shroud the valves and remove material from inside the chamber but try not to enlarge the original outer shape of the chamber. Research,research,research. make it .020" thou and .040" thou
_________________ R.I.P HANS HARTMAN |
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| misk_one |
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if you are going to buy 2 AU gaskets, you may as well pay the $160 or whatever it is for an ACL gasket - they have a few more options
as said above, you wouldn't even lower the compression if you are using an EA-EL engine... it would just be standard comp (or higher depending on how much has been shaved off the head) i will be using a 1.3mm head gasket (.051"), but ou mthats only cause the head im using has been shaved a few times and final comp for me will be around 9:1 with that. give us some more info about your engine, turbo setup and power goals.
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