Need help finding valves for N351 heads...

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Need help finding valves for N351 heads...

Post  jbozzelle on November 5th 2015, 5:44 pm

Guys,

I have a set of N351 heads I'm trying to put together.  The spec sheet calls for the following valves:

Ford Racing M-6505-A351 1.600" Premium Stainless Steel Exhaust Valve N351 Head
•Head Diameter: 1.600"
•Tip Length: 0.250"
•Total Length: 5.140"
•Material: Premium Stainless Steel

Ford Racing M-6507-A351 Premium Stainless Steel 2.02" Intake Valve
•Head Diameter: 2.020"
•Tip Length: 0.250"
•Total Length: 5.140"
•Material: Premium Stainless Steel


Problem is these valves are no longer available from FRPP.  So I dug through the Manley catalog and the valves that Manley list for this specific head do not have the same overall and tip length.  At this point I'm lost and need some guidance on what to do regarding which valves are the correct valves to get.

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Re: Need help finding valves for N351 heads...

Post  dfree383 on November 5th 2015, 5:52 pm

jbozzelle wrote:Guys,

I have a set of N351 heads I'm trying to put together.  The spec sheet calls for the following valves:

Ford Racing M-6505-A351 1.600" Premium Stainless Steel Exhaust Valve N351 Head
•Head Diameter: 1.600"
•Tip Length: 0.250"
•Total Length: 5.140"
•Material: Premium Stainless Steel

Ford Racing M-6507-A351 Premium Stainless Steel 2.02" Intake Valve
•Head Diameter: 2.020"
•Tip Length: 0.250"
•Total Length: 5.140"
•Material: Premium Stainless Steel


Problem is these valves are no longer available from FRPP.  So I dug through the Manley catalog and the valves that Manley list for this specific head do not have the same overall and tip length.  At this point I'm lost and need some guidance on what to do regarding which valves are the correct valves to get.

Call Lem and tell him what you need
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Re: Need help finding valves for N351 heads...

Post  dfree383 on November 5th 2015, 5:52 pm

jbozzelle wrote:Guys,

I have a set of N351 heads I'm trying to put together.  The spec sheet calls for the following valves:

Ford Racing M-6505-A351 1.600" Premium Stainless Steel Exhaust Valve N351 Head
•Head Diameter: 1.600"
•Tip Length: 0.250"
•Total Length: 5.140"
•Material: Premium Stainless Steel

Ford Racing M-6507-A351 Premium Stainless Steel 2.02" Intake Valve
•Head Diameter: 2.020"
•Tip Length: 0.250"
•Total Length: 5.140"
•Material: Premium Stainless Steel


Problem is these valves are no longer available from FRPP.  So I dug through the Manley catalog and the valves that Manley list for this specific head do not have the same overall and tip length.  At this point I'm lost and need some guidance on what to do regarding which valves are the correct valves to get.

Call Lem and tell him what you need
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Re: Need help finding valves for N351 heads...

Post  jbozzelle on November 5th 2015, 7:00 pm

Already did. He suggested Manley.

The valves Manley has are either too long, have a longer tip length, or both. Confused on what to do. Need to check other valve suppliers too.

Just curious if someone put some together recently and figured this out already.

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Re: Need help finding valves for N351 heads...

Post  Lem Evans on November 5th 2015, 7:57 pm

I can get them from Ferrea......5.160" w/.250" tip.

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Re: Need help finding valves for N351 heads...

Post  jbozzelle on November 5th 2015, 8:50 pm

Lem Evans wrote:I can get them from Ferrea......5.160" w/.250" tip.

What problems would I have with these being .020 longer than what FRPP spec'd?

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Re: Need help finding valves for N351 heads...

Post  QtrWarrior on November 5th 2015, 9:04 pm

jbozzelle wrote:
Lem Evans wrote:I can get them from Ferrea......5.160" w/.250" tip.

What problems would I have with these being .020 longer than what FRPP spec'd?  


Run 'em... and be done with it...
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Re: Need help finding valves for N351 heads...

Post  jbozzelle on November 5th 2015, 9:28 pm

So just slightly longer pushrod then? Also, any speculation as to why the Manley valves are slightly longer and have a different tip length?

Some sort of advantage to be had with those valves since the head is to be run in a spec class?

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Re: Need help finding valves for N351 heads...

Post  QtrWarrior on November 5th 2015, 9:45 pm

.020" isn't any real advantage, not really an issue either.....  May not need a longer pushrod, as it will depend on deck height, how much heads were cut..etc..etc..
Just check the geometry and get the right pushrod and it will be fine...
Different tip lenght is probably for use with lashcaps...
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Re: Need help finding valves for N351 heads...

Post  Larry Williams on November 6th 2015, 12:39 am

I purchased mine from a company in florida.   I will look up the invoice  but it was a few years ago   might take some time

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8947 N.W. 23rd Street
Doral, Florida 33172



Last edited by Larry Williams on November 6th 2015, 12:44 am; edited 1 time in total
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Re: Need help finding valves for N351 heads...

Post  cool40 on November 6th 2015, 12:40 am

QtrWarrior wrote:.020" isn't any real advantage, not really an issue either.....  May not need a longer pushrod, as it will depend on deck height, how much heads were cut..etc..etc..
Just check the geometry and get the right pushrod and it will be fine...
Different tip lenght is probably for use with lashcaps...
lash caps or extra room for refacing. X2 run'm.
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Re: Need help finding valves for N351 heads...

Post  rmcomprandy on November 6th 2015, 1:24 am

jbozzelle wrote:Guys,

I have a set of N351 heads I'm trying to put together.  The spec sheet calls for the following valves:

Ford Racing M-6505-A351 1.600" Premium Stainless Steel Exhaust Valve N351 Head
•Head Diameter: 1.600"
•Tip Length: 0.250"
•Total Length: 5.140"
•Material: Premium Stainless Steel

Ford Racing M-6507-A351 Premium Stainless Steel 2.02" Intake Valve
•Head Diameter: 2.020"
•Tip Length: 0.250"
•Total Length: 5.140"
•Material: Premium Stainless Steel


Problem is these valves are no longer available from FRPP.  So I dug through the Manley catalog and the valves that Manley list for this specific head do not have the same overall and tip length.  At this point I'm lost and need some guidance on what to do regarding which valves are the correct valves to get.

Those sizes are listed in the Ferrea catalog.

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