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mopardemon71
PostPosted: Thu Oct 30, 2008 8:41 am 
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Ok I got 1.72 chebbie valves now 11/32 stem single lock for the intake does anyone know what valve would be the next size up in diameter? I'm thinking 1.80 area but some where I saw a 1.78 valve.

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SlantSixDan
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PostPosted: Thu Oct 30, 2008 8:51 am 
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1.77" & 1.44" valves from Engnbldr.

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Joshie225
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PostPosted: Thu Oct 30, 2008 9:34 am 
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Actually the Engnbldr intake is 1.70". 1.72 is actually a pretty good size. Going larger may not help and may even hurt performance.

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Charrlie_S
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PostPosted: Thu Oct 30, 2008 10:15 am 
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The valves enginebldr lists for the slantsix are 3/8 stem. Mopar demon stated he has 11/32 stem valves, now, that means he has 11/32 guides.
I would contact engnbldr, and see if he has any 11/32 stem valves that would work. Also there is probably, a valve from a chevy distributer that will work.

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Shaker223
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PostPosted: Thu Oct 30, 2008 10:26 am 
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You can always have the valve turned down to fit your application too.
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Doc
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PostPosted: Thu Oct 30, 2008 10:55 am 
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There is a 3/8 stem Mopar BB exhaust valve at 1.74 and an oversize at 1.80
I have used these as intake valves on Slants.
As noted, you do not really need to go that big in order to get good flow.
DD


Last edited by Doc on Thu Oct 30, 2008 2:47 pm, edited 1 time in total.

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Dart270
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PostPosted: Thu Oct 30, 2008 12:02 pm 
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SBC 1.72 valves work very well. SB Ford 1.78s are a good step up, but not necessary for most bore sizes and builds.

Lou

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slantzilla
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PostPosted: Thu Oct 30, 2008 2:38 pm 
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The bigger size valves flow real good on a flow bench. Same can not be said when the head is on a running motor. :shock:

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walpolla
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PostPosted: Thu Oct 30, 2008 3:47 pm 
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stainless valves

ex : engnbldr

regards,Rod :D
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sandy in BC
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PostPosted: Thu Oct 30, 2008 4:37 pm 
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Unless you are pepared to spend a lot of time to do what is necessary to make bigger valves work you are wasting your time.

Optimize the 1.72s and then see where you are at.

I have 1.72 intake and 1.50 exhaust valves in my motor and it took a lot of millwork/relieving to make that half right.........

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