Manley valves

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LaVelle
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Manley valves

Post by LaVelle » Wed Oct 18, 2017 11:18 am

I have acquired a set of Manley valves and am trying to determine if they are an intake or exhaust material.
I have no idea what the original application is for them, (possibly Pontiac exhaust) they are 11/32 stems and 1.77-78" dia.
On the end of the stem it has ( MANLEY K-HB ).
Anyone know what the K-HB means.

mag2555
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Re: Manley valves

Post by mag2555 » Wed Oct 18, 2017 12:12 pm

Sounds like a Pontiac Exh to me, and I can confirm that Manley Pontiac Exh valves do check in dead on at 1.77", where as Ferrea 's check in at 1.75".

Email Manley on the stamping code.

LaVelle
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Re: Manley valves

Post by LaVelle » Wed Oct 18, 2017 3:06 pm

mag2555 wrote:
Wed Oct 18, 2017 12:12 pm
Sounds like a Pontiac Exh to me, and I can confirm that Manley Pontiac Exh valves do check in dead on at 1.77", where as Ferrea 's check in at 1.75".

Email Manley on the stamping code.
Manley said that the K-HB is a batch code.

Geoff2
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Re: Manley valves

Post by Geoff2 » Thu Oct 19, 2017 5:07 am

Pontiac 1.77" exh valves came in 3 lengths, depending on the heads they were used in. 4.98", 5.1" & 5.2".

LaVelle
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Re: Manley valves

Post by LaVelle » Thu Oct 19, 2017 5:50 pm

Geoff2 wrote:
Thu Oct 19, 2017 5:07 am
Pontiac 1.77" exh valves came in 3 lengths, depending on the heads they were used in. 4.98", 5.1" & 5.2".
Looks like I have 8 of the 5.2's, Plan is to set up some peanut ports for 11/32 stems and will use them for the exhaust enlarging from the 1.72 and using small block chevy extended length 2.10's for the intakes.

mag2555
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Re: Manley valves

Post by mag2555 » Fri Oct 20, 2017 6:41 am

That sounds good, and you can increase the valve bowl Throat size by .020" and still have good meat for a nice 3 angle seat job!
Be sure to back cut the valve's with a 30 to leave you a .075" wide seat.

travis
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Re: Manley valves

Post by travis » Fri Oct 20, 2017 8:18 am

1.78" is also the stock intake valve on a lot of small block fords, but I don't remember what their length is

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