Port Divider pics

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Anonymous

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The following may be good for a sticky since we get so manu questions on the subject.

Pictures show
* a new port divider
* where it will go
* pics of port divider after much grinding and finsishing with a dremel tool
* port divider epoxied in place (rags were removed when done)

I used Cotronics high temp ceramic epoxy to hold it in place. I stuffed a rag down each exhaust port to keep junk out of the cylinders. I also vacuumed these out and cleaned up the metal with denatured alcohol before I epoxied the port divider in place. I also did some minor grinding inside the exhaust port to remove some old casting slag.

I'll post pics of the header installed soon.

Steve-O


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Don't you have to do a lot more grinding to match the new "ports" to the exhaust manifold gasket or header ports? It looks like those ports are now way smaller than the other exhaust ports on the head?
 
Other ports aren't much bigger. Here is pic of a gasket for post divider install from FSPP.
See the size of the ports on cylinders 1, 2, 5 and 6.

r/
Steve-O
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I used the same gasket, but found that with the port divider installed almost 1/3rd of the top part of the gasket opening on those ports was covered by the port divider. Show a pic of one of those gaskets up against your installed port divider and you'll see what I mean.

So I spent a lot of time grinding to at least match to the header port, which was slightly smaller than the gasket opening but significantly larger than the port divider originally left. Maybe I wasted my time...?
 
I have a header gasket I got from FSPP and it has corrected port sizes for the new divider. Looks like it will be a good fit.
Here is a pic of a port divider in place (not mine)...note the size of the existing exhaust ports relative to the one with the divider. And pic of new gasket...
Close enough match for me.

Steve-O
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New gasket with correct size holes...
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I put the MIG to mine last weekend...and no I didn't heat the head---I just spot welded and let it cool back and forth across the opening and inside the top of the port center divide. I did hear a slight and barely audible pop type noise and am not sure if it was the weld or the head......guess I will find out when I take it to the machinist...huh! If it is cracked I will consider it part of the overall learning curve and go get another head. :) [/url]
 
Here is the header installed. Working on the throttle linkage now.

What I did was put a couple of 5" long 3/8" bolts in the bottom two holes of the manifold that matched the holes with openings on the header flanges. What I mean is holes where you can slide the header over the bolt, not a closed header bolt hole. Then I cut the Clifford gasket the same way with a dremel to match.

I used Ultra Gold silicone and set up a minimum 1/8" bead around each side of the exhaust port on the gasket. Let dry at least ten minutes.

Install without smearing. Looslely tighten header bolts (Breslin's). Let sit for about 2 hours. Then tighten up to 20 ft-lbs on each bolt. Retighten periodically to ensure 20- ft-lbs.

Started it today with open headers...wow it was loud but sounded good. I think I'll like the twin glasspack sound.

Here are some pics of the installed header.

I'll keep you posted on the throttle linkage as it comes along.

Cheers,
Steve-O



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