[Spridgets] Manifold flange thickness

Rick Fisk refisk at chartermi.net
Sat Sep 5 16:04:24 MDT 2020


Since all 5 ports are right in a row only one gasket is used.  Even if separate gaskets were used everything would have to be the same thickness because on 4 of the studs the nuts and washers are shared between two ports.

Sent from my keyboard

>> On Sep 5, 2020, at 5:43 PM, derf <derf247 at gmail.com> wrote:
> 
> I sit corrected.  It's been a while since I had a manifold off.  Seems like my Titan single HIF6 intake had a separate gasked, though.  
> 
>> On Sat, Sep 5, 2020 at 4:39 PM Weslake1330 <weslake1330 at gmail.com> wrote:
>> On the A-series it should be a single gasket that seals both the inlet and the exhaust ports at the head.
>> 
>>> On Sat, 5 Sep 2020 at 22:37, derf <derf247 at gmail.com> wrote:
>>> I would carefully grind washers.  Even if both flanges are the correct thickness you will most likely have gaskets of differing thicknesses.  
>>> 
>>>> On Sat, Sep 5, 2020 at 4:31 PM Weslake1330 via Spridgets <spridgets at autox.team.net> wrote:
>>>> I would contact Maniflow and ask them what the correct thickness is to establish if the exhaust is incorrect or if the inlet manifold is correct and then invite them to send a replacement part.  I'd also want to be sure that something that is claimed to be made by Maniflow really is.
>>>> 
>>>> Regards
>>>> 
>>>> Daniel S
>>>> 
>>>>> On Sat, 5 Sep 2020 at 20:12, Rick Fisk via Spridgets <spridgets at autox.team.net> wrote:
>>>>> Send it all back to Maniflow and tell them to get their shxt together.  No excuse for this kind of BS.  They make both parts and they don't match?  Ridiculous.  
>>>>> 
>>>>> Have you contacted them?
>>>>> 
>>>>> Rick
>>>>> 
>>>>> Sent from my keyboard
>>>>> 
>>>>>>> On Sep 5, 2020, at 2:45 PM, Michael MacLean via Spridgets <spridgets at autox.team.net> wrote:
>>>>>> 
>>>>>> Have the exhaust faces machined down 35 thou.  Being both Maniflo they should have matched thicknan.  I have the LCB header (I don't know who makes it) on my 1275 and a Titan intake manifold for my single HIF44 carb.  They match perfectly. Supposed to be a standard thickness for the flanges. 
>>>>>> Mike MacLean
>>>>>> 
>>>>>> On Saturday, September 5, 2020, 11:22:59 AM PDT, Hal Faulkner via Spridgets <spridgets at autox.team.net> wrote:
>>>>>> 
>>>>>> 
>>>>>> Listerati,
>>>>>> Trying to get off my rear end and make some progress in my long term overhaul of FROG AYE, my 1960 Frogeye. The engine is now a 20 over 1275 with some porting, oversize valves and VP-SP3 cam. I have replaced the old 3 to one exhaust manifold with a Maniflow LCB, the intake manifold is also by Maniflow, for the HS-2 carbs that came with the car.  The concern I have is that the flange is thicker on the exhaust than on the intake.  Torquing the manifolds until the exhaust just touches the block (no gasket for this measurement) leaves the intake manifold with about 35 thousands play.  Of course, this can be taken up in the gasket, but that leaves the washer on the intake side (of the common studs) sitting at a noticeable angle, which ,if nothing else, doesn't look very cool.  The attached photo shows about .035" of feeler between the washero and the intake manifold flange.  The exhaust manifold is snug.  
>>>>>> 
>>>>>> What would you do?  
>>>>>> 
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>>>>> ------------------------
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>>>>> spridgets at autox.team.net
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