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Author Topic: 7900 AM cylinder transfer ports  (Read 685 times)

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Offline jar944

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7900 AM cylinder transfer ports
« on: February 10, 2015, 08:08:42 am »
It has TINY ducts  :o So small the burr wont clear.



It makes the OEM ducts seem huge.

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Offline aclarke

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Re: 7900 AM cylinder transfer ports
« Reply #1 on: February 10, 2015, 09:29:41 am »
Several of the AM 7900 cylinders I've worked on had the ducts cast off-center to the bore. 
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Offline jar944

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Re: 7900 AM cylinder transfer ports
« Reply #2 on: February 10, 2015, 10:10:35 am »
Quote from: aclarke on February 10, 2015, 09:29:41 am
Several of the AM 7900 cylinders I've worked on had the ducts cast off-center to the bore. 

Yeah I ended up with two cylinders and both are off center. The transfer ducts are the same in cross section on both sides (and both cylinders).

I may cut through the wall before I get up to the stock size.
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Offline srcarr52

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Re: 7900 AM cylinder transfer ports
« Reply #3 on: February 10, 2015, 11:37:46 am »
Quote from: jar944 on February 10, 2015, 10:10:35 am
I may cut through the wall before I get up to the stock size.

Time to fire up the tig welder.
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Offline jar944

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Re: 7900 AM cylinder transfer ports
« Reply #4 on: February 10, 2015, 12:06:31 pm »
Quote from: srcarr52 on February 10, 2015, 11:37:46 am
Quote from: jar944 on February 10, 2015, 10:10:35 am
I may cut through the wall before I get up to the stock size.

Time to fire up the tig welder.

Ha, yeah. I guess I should pad up the outside of the transfers before I see daylight.
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Offline mdavlee .

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Re: 7900 AM cylinder transfer ports
« Reply #5 on: February 10, 2015, 12:58:34 pm »
Weld some thickness on there or you'll have to devcon it later.
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Offline aclarke

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Re: 7900 AM cylinder transfer ports
« Reply #6 on: February 10, 2015, 01:07:50 pm »
Making the ducts as big as stock may be fruitless IMO.  Ive Added material (Devcon) to tighten up 372 and 7900 ducts that have been opened up too far with good results when the saws became lazy...
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Offline David Young

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Re: 7900 AM cylinder transfer ports
« Reply #7 on: May 07, 2015, 08:24:56 pm »
Pics Adam?
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Offline aclarke

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Re: 7900 AM cylinder transfer ports
« Reply #8 on: May 08, 2015, 12:21:49 am »
David. I'll take a few pics this weekend.
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