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what size and model oversize valves are good for I6 e series 

 

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 Post subject: what size and model oversize valves are good for I6 e series
Posted: Mon Oct 29, 2007 7:19 pm 
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hey guys

mate got this engine(EB XR6) in shop and he looking for some over size valves to fit to his head before port and polishing.

what size and brand do you guys recommend?

i heard something about ford v8 valves are good but i find that hard to beleave.

thx jason

 

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Posted: Mon Oct 29, 2007 7:59 pm 
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I think it is as big as you can go in a tickford head. but I could be wrong.

 

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Posted: Mon Oct 29, 2007 8:17 pm 
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you sure? i thought you could go bigger that than but hay you might be right hopefully find out soon

 

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Posted: Mon Oct 29, 2007 9:11 pm 
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You can put 351 C valves in but the valves have to be turned down on a lathe to the correct diameter.

 

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Posted: Mon Oct 29, 2007 9:33 pm 
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the XR6 exhaust valve is plenty big enough and doesn't need changing.

as for the intake, you will not find an off the shelf valve to in the right size to fit. You'll only fit about 60thou larger in space there is and for that you need to modify a valve from a different engine or have some custom made

 

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Posted: Mon Oct 29, 2007 9:37 pm 
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opto wrote:
You can put 351 C valves in but the valves have to be turned down on a lathe to the correct diameter.


ill be darn lol

the stem on the valve to thick? is what what you mean?

they same lenght?

they have 1 or 2 groves for the valve locks? one aint it?

are they any larger? if so how much by?

 

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Posted: Mon Oct 29, 2007 10:04 pm 
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The 351C valves will fit in the guides, but, they ( inlets ) are slightly longer than original valves. The 351C exhaust valves are shorter than the 4.0I6 ones.
Here are some pics to show. The Clevo ( 2V ) ones are on the left.
Also are pics of the Clevo valves in the 4.0 I6 cyl head.

 

 

Attachments:
351C 2V valves Vs 4.0I6 valves 009.jpg
351C 2V valves Vs 4.0I6 valves 009.jpg [ 267.74 KiB | Viewed 42 times ]
351C 2V valves Vs 4.0I6 valves 003.jpg
351C 2V valves Vs 4.0I6 valves 003.jpg [ 244.65 KiB | Viewed 42 times ]
351C 2V valves Vs 4.0I6 valves 001.jpg
351C 2V valves Vs 4.0I6 valves 001.jpg [ 429.1 KiB | Viewed 41 times ]
351C 2V valves Vs 4.0I6 valves 005.jpg
351C 2V valves Vs 4.0I6 valves 005.jpg [ 376.8 KiB | Viewed 42 times ]

 

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Posted: Mon Oct 29, 2007 10:06 pm 
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This is all 4 valves together, Clevo on the left.

 

 

Attachments:
351C 2V valves Vs 4.0I6 valves 007.jpg
351C 2V valves Vs 4.0I6 valves 007.jpg [ 500.83 KiB | Viewed 38 times ]

 

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Posted: Mon Oct 29, 2007 10:12 pm 
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so can u still use the exhaust ones even knowing there shorter or just got to go with xr6 exhaust and 351 clev inlets

 

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Posted: Mon Oct 29, 2007 10:21 pm 
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Xflow wrote:
so can u still use the exhaust ones even knowing there shorter or just got to go with xr6 exhaust and 351 clev inlets


Did you notice the tip heights are different. The Clevo ones are higher. I don't know how far the hardness goes down on the tips of the Clevo valves.

 

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Posted: Mon Oct 29, 2007 10:32 pm 
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ow i see stupid me lol

just cut off the excessive grove and cut new grove lower down or just get a regrind cam and that should make up for shims lol just shim other side all good.

just get some stainless steal valves or titanium.

 

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