Classic Mustangs List Archive

This read-only message was archived from a public mail list.
Mail From: Mike Marshall (email redacted)

I have heard that Holley has a fix for the problem. Anyone know about the
Holley fix???

Mike

>Mike Marshall wrote:
>>
>> BTW, I have heard that Holley has a fix for the 'blows power valves
>> problem'. Does anyone know about it??
>
>There are some old racer fixes, most of which involve
>invasive operations to install a blow-by valve. This
>is simpler than it may sound and involves drilling a
>new passage, then installing an undersized bearing as
>a flow-restrictor. If the passage is properly formed,
>the bearing will seat under backfire pressure (a big
>cause of power valve failure), blocking it pre-valve.
>
>Please understand, I'm being vague for both convenience
>and as a precaution.
>--
>MrF
>Allen Cross



---------------------------------------------------------------------
For information on Subscribing and Unsubscribing as well as a list
archive please visit:

antler.webworks.ca/cm

This read-only message was archived from a public mail list.
Mail From: MrFomoco (email redacted)

Mike Marshall wrote:
>
> I have heard that Holley has a fix for the problem. Anyone know about the
> Holley fix???

Well, you could try calling them:
615-859-4924
--
MrF
Allen Cross
-------------------------------------------------------------------------
THE online source for 1960-1973 Ford & L-M info
voicenet.com/~fomoco
Original articles, NOS parts, tech advice & more!

---------------------------------------------------------------------
For information on Subscribing and Unsubscribing as well as a list
archive please visit:

antler.webworks.ca/cm

This read-only message was archived from a public mail list.
Mail From: Bill Lewis (email redacted)

MrFomoco <(email redacted)> wrote:
> Subject: Re: Power Valve failure...
>
> Mike Marshall wrote:
> >
> > I have heard that Holley has a fix for the problem. Anyone know about the
> > Holley fix???
>
> Well, you could try calling them:
> 615-859-4924
> --
> MrF
> Allen Cross

Another solution is to stop using carbs that are too damn big for the
engines. That cuts down on backfiring!

Bill


---------------------------------------------------------------------
For information on Subscribing and Unsubscribing as well as a list
archive please visit:

antler.webworks.ca/cm

This read-only message was archived from a public mail list.
Mail From: MrFomoco (email redacted)

Bill Lewis wrote:
>
> Another solution is to stop using carbs that are too damn big for the
> engines. That cuts down on backfiring!

Sure, sure - throw logic in our faces! ;-)
--
MrF
Allen Cross
-------------------------------------------------------------------------
THE online source for 1960-1973 Ford & L-M info
voicenet.com/~fomoco
Original articles, NOS parts, tech advice & more!

---------------------------------------------------------------------
For information on Subscribing and Unsubscribing as well as a list
archive please visit:

antler.webworks.ca/cm

This read-only message was archived from a public mail list.
Mail From: Mike Marshall (email redacted)

Bill,

Is a 600cfm Holley too big for a 390 4V? It eats power valves like candy...

Mike
-----Original Message-----
From: Bill Lewis <(email redacted)>
To: Multiple recipients of list <(email redacted)>
Date: Tuesday, January 20, 1998 7:09 PM
Subject: [CM:8674] Re: Power Valve failure...


>MrFomoco <(email redacted)> wrote:
>> Subject: Re: Power Valve failure...
>>
>> Mike Marshall wrote:
>> >
>> > I have heard that Holley has a fix for the problem. Anyone know about
the
>> > Holley fix???
>>
>> Well, you could try calling them:
>> 615-859-4924
>> --
>> MrF
>> Allen Cross
>
>Another solution is to stop using carbs that are too damn big for the
>engines. That cuts down on backfiring!
>
>Bill
>
>
>---------------------------------------------------------------------
>For information on Subscribing and Unsubscribing as well as a list
>archive please visit:
>
> antler.webworks.ca/cm
>


---------------------------------------------------------------------
For information on Subscribing and Unsubscribing as well as a list
archive please visit:

antler.webworks.ca/cm

This read-only message was archived from a public mail list.
Mail From: Bill Lewis (email redacted)

"Mike Marshall" <(email redacted)> wrote:
>
> Bill,
>
> Is a 600cfm Holley too big for a 390 4V? It eats power valves like candy...
>
> Mike

Well, no, it isn't too big. I was trying to be cute.

Backfiring through the intake can be caused by late ignition timing
or too lean a mixture. Don't overlook burnt or misadjusted valves.
Or trying to run a healthy cam at too low a speed. Blocking the
manifold heat riser passages often results in fuel condensing on the
manifold runners at low speeds, which leans out the mixture.

Bill


---------------------------------------------------------------------
For information on Subscribing and Unsubscribing as well as a list
archive please visit:

antler.webworks.ca/cm