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Trevor P
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Joined: January 21, 2004
Posts: 863
Location: Saskatoon, SK, Canada
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 Posted: Fri Dec 09, 2016 11:48 am Post subject: 40hp and FI exhaust valves |
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Can't locate a set of new 40hp exhaust valves at the moment due the suppliers I normally use being out of stock right now
Has anyone run the later FI 1600 30mm exhaust valves in a 40hp head? Other than reaming the guides for the 9mm stems; will they work?
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53 Canadian standard oval
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sgmalt46
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Joined: April 20, 2005
Posts: 1296
Location: south san francisco
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| Posted: Fri Dec 09, 2016 12:17 pm Post subject: Re: 40hp and FI exhaust valves |
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wolfsburg west has them in stock. i think you can run the FI one's ? just replace the guides. more work to ream them ?
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williamM
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Joined: August 07, 2008
Posts: 4333
Location: southwest Arizona
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| Posted: Fri Dec 09, 2016 12:34 pm Post subject: Re: 40hp and FI exhaust valves |
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Hold up the 40 hp valves and compare them with the 9mm valves- do you think they would flow the same-
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diablosandwich
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Joined: January 15, 2012
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Location: Illinois
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Trevor P
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Joined: January 21, 2004
Posts: 863
Location: Saskatoon, SK, Canada
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| Posted: Fri Dec 09, 2016 5:22 pm Post subject: Re: 40hp and FI exhaust valves |
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| williamM wrote: |
| Hold up the 40 hp valves and compare them with the 9mm valves- do you think they would flow the same- |
I don't have any FI ones here to compare to.
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53 Canadian standard oval
56 Wolfsburg PG/SG
57 Oval, 2332 & Berg 5
70 911T
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John Moxon 
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Joined: March 07, 2004
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Location: Southampton U.K.
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williamM
Samba Member
Joined: August 07, 2008
Posts: 4333
Location: southwest Arizona
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| Posted: Sat Dec 10, 2016 8:12 am Post subject: Re: 40hp and FI exhaust valves |
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| Trevor P wrote: |
| williamM wrote: |
| Hold up the 40 hp valves and compare them with the 9mm valves- do you think they would flow the same- |
I don't have any FI ones here to compare to. |
at the time those were invented(read- used by vw)- VW was trying to meet emissions in the US that was going to put them out of the air cooled business.
SO they needed to run lean -which raised temps- all good for emissions- but the valve heads kept falling off.
in an effort to solve this they combined all the best technology- that is sodium filled stelite heads on big stems.
While they worked for the most part- they sure fill the hole.
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some days I get up and just sit and think. Some days I just sit.
opinion untempered by fact is ignorance.
Don't step in any! |
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