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| is the GMC exhaust manifold better than toro? [message #86033] |
Tue, 25 May 2010 14:28  |
hertfordnc
Messages: 1164
Registered: September 2009
Location: East NC
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I acquired a nice set of GMC manifolds, milled and ready to go in.
But they have a different bend from the stock Toro manifolds in the Revcon.
There's plenty of room to modify the exhaust to accomidate them, if they are in any way better.
My existing manifolds leak terribly and there are no decent auto machine shops around here.
thanks
Dave
Dave & Ellen Silva
Hertford, NC
76 Birchaven, 1-ton and other stuff
Currently planning the Great american Road Trip Summer 2021
It's gonna take a lot of Adderall to get this thing right.
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| Re: [GMCnet] is the GMC exhaust manifold better than toro? [message #86034 is a reply to message #86033] |
Tue, 25 May 2010 14:37  |
Steven Ferguson
Messages: 3447
Registered: May 2006
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The GMC manuals have cast in ribs on the sides, presumably, for
strength. One side should be a direct fit.
The copper Mr Gasket manifold gaskets are excellent in this
application and crush to fill small eroded areas on the heads or
existing manifolds.
On Tue, May 25, 2010 at 12:28 PM, dave silva <gmc@davesilva.com> wrote:
>
>
> I acquired a nice set of GMC manifolds, milled and ready to go in.
>
> But they have a different bend from the stock Toro manifolds in the Revcon.
>
> There's plenty of room to modify the exhaust to accomidate them, if they are in any way better.
>
> My existing manifolds leak terribly and there are no decent auto machine shops around here.
>
> thanks
>
> Dave
> --
> Free to good home- the rest of a 1974 GMC. good for extension, or trailer. But you gotta' take the whole thing -zip 27944- rear wheels, glass, etc.
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Steve Ferguson
'76 EII
Sierra Vista, AZ
Urethane bushing source
www.bdub.net/ferguson/
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| Re: [GMCnet] is the GMC exhaust manifold better than toro? [message #86055 is a reply to message #86034] |
Tue, 25 May 2010 17:40 |
fred v
Messages: 999
Registered: April 2006
Location: pensacola, fl.
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| Steven Ferguson wrote on Tue, 25 May 2010 14:37 |
The GMC manuals have cast in ribs on the sides, presumably, for
strength. One side should be a direct fit.
The copper Mr Gasket manifold gaskets are excellent in this
application and crush to fill small eroded areas on the heads or
existing manifolds.
Steve Ferguson
'76 EII
Sierra Vista, AZ
Urethane bushing source
www.bdub.net/ferguson/
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i tried the Mr Gasket copper gaskets and found they didn't fit the openings worth a crap. i ended up get Dick Patterson's and they fit like they should.
Fred V
'77 Royale RB 455
P'cola, Fl
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| Re: [GMCnet] is the GMC exhaust manifold better than toro? [message #86056 is a reply to message #86034] |
Tue, 25 May 2010 17:49 |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
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Senior Member |
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Steve
I don't think the Mr Gasket fit the stock manifold. The openings are
too high to seal well. However they fit the Thorley headers well. Dave
Lenzis fit well but they won't seal on the headers
Emery Stora
On May 25, 2010, at 1:37 PM, Steven Ferguson <botiemad11@gmail.com>
wrote:
> The GMC manuals have cast in ribs on the sides, presumably, for
> strength. One side should be a direct fit.
> The copper Mr Gasket manifold gaskets are excellent in this
> application and crush to fill small eroded areas on the heads or
> existing manifolds.
>
> On Tue, May 25, 2010 at 12:28 PM, dave silva <gmc@davesilva.com>
> wrote:
>>
>>
>> I acquired a nice set of GMC manifolds, milled and ready to go in.
>>
>> But they have a different bend from the stock Toro manifolds in the
>> Revcon.
>>
>> There's plenty of room to modify the exhaust to accomidate them, if
>> they are in any way better.
>>
>> My existing manifolds leak terribly and there are no decent auto
>> machine shops around here.
>>
>> thanks
>>
>> Dave
>> --
>> Free to good home- the rest of a 1974 GMC. good for extension, or
>> trailer. But you gotta' take the whole thing -zip 27944- rear
>> wheels, glass, etc.
>> _______________________________________________
>> GMCnet mailing list
>> List Information and Subscription Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>
>
>
>
> --
> Steve Ferguson
> '76 EII
> Sierra Vista, AZ
> Urethane bushing source
> www.bdub.net/ferguson/
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
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| Re: [GMCnet] is the GMC exhaust manifold better than toro? [message #86126 is a reply to message #86056] |
Wed, 26 May 2010 08:49 |
Steven Ferguson
Messages: 3447
Registered: May 2006
Karma: 0
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You are correct Emery. I muffed that one. There are no copper
gaskets for the cast iron manifolds. I have used composition gaskets
with cast iron manifolds in many applications including the GMC for
years. Judicious retorquing after a few heating and cooling cycles is
just as necessary as on cast iron headers as it is when using steel
tubular headers. I recommend the use of high temp RTV also unless you
have O2 sensors.
Sorry for the bad info.
On Tue, May 25, 2010 at 3:49 PM, Emery Stora <emerystora@mac.com> wrote:
> Steve
>
> I don't think the Mr Gasket fit the stock manifold. The openings are
> too high to seal well. However they fit the Thorley headers well. Dave
> Lenzis fit well but they won't seal on the headers
>
>
>
>
>
> Emery Stora
>
> On May 25, 2010, at 1:37 PM, Steven Ferguson <botiemad11@gmail.com>
> wrote:
>
>> The GMC manuals have cast in ribs on the sides, presumably, for
>> strength. One side should be a direct fit.
>> The copper Mr Gasket manifold gaskets are excellent in this
>> application and crush to fill small eroded areas on the heads or
>> existing manifolds.
>>
>> On Tue, May 25, 2010 at 12:28 PM, dave silva <gmc@davesilva.com>
>> wrote:
>>>
>>>
>>> I acquired a nice set of GMC manifolds, milled and ready to go in.
>>>
>>> But they have a different bend from the stock Toro manifolds in the
>>> Revcon.
>>>
>>> There's plenty of room to modify the exhaust to accomidate them, if
>>> they are in any way better.
>>>
>>> My existing manifolds leak terribly and there are no decent auto
>>> machine shops around here.
>>>
>>> thanks
>>>
>>> Dave
>>> --
>>> Free to good home- the rest of a 1974 GMC. good for extension, or
>>> trailer. But you gotta' take the whole thing -zip 27944- rear
>>> wheels, glass, etc.
>>> _______________________________________________
>>> GMCnet mailing list
>>> List Information and Subscription Options:
>>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>>
>>
>>
>>
>> --
>> Steve Ferguson
>> '76 EII
>> Sierra Vista, AZ
>> Urethane bushing source
>> www.bdub.net/ferguson/
>> _______________________________________________
>> GMCnet mailing list
>> List Information and Subscription Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Steve Ferguson
'76 EII
Sierra Vista, AZ
Urethane bushing source
www.bdub.net/ferguson/
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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| Re: [GMCnet] is the GMC exhaust manifold better than toro? [message #86256 is a reply to message #86126] |
Thu, 27 May 2010 00:25 |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
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Senior Member |
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Three are no Mr. Gasket ones but the one that Dave Lenzi makes fits
the cast iron manifolds well.
Emery Stora
On May 26, 2010, at 7:49 AM, Steven Ferguson <botiemad11@gmail.com>
wrote:
> You are correct Emery. I muffed that one. There are no copper
> gaskets for the cast iron manifolds. I have used composition gaskets
> with cast iron manifolds in many applications including the GMC for
> years. Judicious retorquing after a few heating and cooling cycles is
> just as necessary as on cast iron headers as it is when using steel
> tubular headers. I recommend the use of high temp RTV also unless you
> have O2 sensors.
> Sorry for the bad info.
>
> On Tue, May 25, 2010 at 3:49 PM, Emery Stora <emerystora@mac.com>
> wrote:
>> Steve
>>
>> I don't think the Mr Gasket fit the stock manifold. The openings are
>> too high to seal well. However they fit the Thorley headers well.
>> Dave
>> Lenzis fit well but they won't seal on the headers
>>
>>
>>
>>
>>
>> Emery Stora
>>
>> On May 25, 2010, at 1:37 PM, Steven Ferguson <botiemad11@gmail.com>
>> wrote:
>>
>>> The GMC manuals have cast in ribs on the sides, presumably, for
>>> strength. One side should be a direct fit.
>>> The copper Mr Gasket manifold gaskets are excellent in this
>>> application and crush to fill small eroded areas on the heads or
>>> existing manifolds.
>>>
>>> On Tue, May 25, 2010 at 12:28 PM, dave silva <gmc@davesilva.com>
>>> wrote:
>>>>
>>>>
>>>> I acquired a nice set of GMC manifolds, milled and ready to go in.
>>>>
>>>> But they have a different bend from the stock Toro manifolds in the
>>>> Revcon.
>>>>
>>>> There's plenty of room to modify the exhaust to accomidate them, if
>>>> they are in any way better.
>>>>
>>>> My existing manifolds leak terribly and there are no decent auto
>>>> machine shops around here.
>>>>
>>>> thanks
>>>>
>>>> Dave
>>>> --
>>>> Free to good home- the rest of a 1974 GMC. good for extension, or
>>>> trailer. But you gotta' take the whole thing -zip 27944- rear
>>>> wheels, glass, etc.
>>>> _______________________________________________
>>>> GMCnet mailing list
>>>> List Information and Subscription Options:
>>>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>>>
>>>
>>>
>>>
>>> --
>>> Steve Ferguson
>>> '76 EII
>>> Sierra Vista, AZ
>>> Urethane bushing source
>>> www.bdub.net/ferguson/
>>> _______________________________________________
>>> GMCnet mailing list
>>> List Information and Subscription Options:
>>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>> _______________________________________________
>> GMCnet mailing list
>> List Information and Subscription Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>
>
>
>
> --
> Steve Ferguson
> '76 EII
> Sierra Vista, AZ
> Urethane bushing source
> www.bdub.net/ferguson/
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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