Aluminum Cylinder Head Clearance
#2676539
07/11/19 11:21 AM
07/11/19 11:21 AM
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Joined: Jan 2005
Posts: 4,525 Michigan
MarkZ
OP
Worthy
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OP
Worthy
Joined: Jan 2005
Posts: 4,525
Michigan
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While trying to install the Holley distributor to enable timing control on my Sniper setup I discovered the base of the distributor hits the head and won't seat properly. I've marked the area that needs to be clearanced. What do you guys think, rotary file? I could probably get a grinding disc in there, but the aluminum would load up on the disk.
1987 Fifth Avenue - 512/518/D60
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Re: Aluminum Cylinder Head Clearance
[Re: AndyF]
#2676677
07/11/19 10:56 PM
07/11/19 10:56 PM
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Joined: May 2015
Posts: 1,134 Lost in Time
Iowan
super stock
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super stock
Joined: May 2015
Posts: 1,134
Lost in Time
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I've got a inline cutoff wheel that would work great for that, I'd use it like a grinder and let the wheel make a nice cut using in a sweeping motion. It would make a nice concave cut in the head, I would then clean it up with a inline belt sander. The concave shape would fit the distributor.
Have a great day Iowan
"obsolete is neat"
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Re: Aluminum Cylinder Head Clearance
[Re: MarkZ]
#2676701
07/12/19 01:08 AM
07/12/19 01:08 AM
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Joined: Jan 2003
Posts: 31,200 Oregon
AndyF
I Win
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I Win
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Posts: 31,200
Oregon
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Re: Aluminum Cylinder Head Clearance
[Re: Sniper]
#2676739
07/12/19 08:28 AM
07/12/19 08:28 AM
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Joined: Jan 2005
Posts: 4,525 Michigan
MarkZ
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OP
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Posts: 4,525
Michigan
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So what does this distributor bring to the show that a lean burn distributor doesn't? Other than clearance issues and triple the price, or more? It uses hall effect sensors as opposed to magnetic pickup for the trigger. I guess mag pickups don't provide a clean enough signal for the ECU. I'll report back when I've had a chance to work on the car. Thanks everyone.
1987 Fifth Avenue - 512/518/D60
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Re: Aluminum Cylinder Head Clearance
[Re: krautrock]
#2676900
07/12/19 07:43 PM
07/12/19 07:43 PM
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Joined: Jan 2003
Posts: 31,200 Oregon
AndyF
I Win
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I Win
Joined: Jan 2003
Posts: 31,200
Oregon
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Andy, what heads did you use on that motor? Trickflow? No, that engine had Mopar Performance 452 aluminum heads. My new engine has Trick Flow heads and they did not require clearancing.
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Re: Aluminum Cylinder Head Clearance
[Re: AndyF]
#2679486
07/20/19 04:44 PM
07/20/19 04:44 PM
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Joined: Jan 2005
Posts: 4,525 Michigan
MarkZ
OP
Worthy
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OP
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Posts: 4,525
Michigan
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I feel rather silly now, but yeah, I did and I didn't even remember that bit. Going to Menard's in the morning to pick up a sanding drum.
1987 Fifth Avenue - 512/518/D60
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Re: Aluminum Cylinder Head Clearance
[Re: MarkZ]
#2679799
07/21/19 03:53 PM
07/21/19 03:53 PM
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Joined: Jan 2005
Posts: 4,525 Michigan
MarkZ
OP
Worthy
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OP
Worthy
Joined: Jan 2005
Posts: 4,525
Michigan
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Distributor fits. Went with Andy's advice and picked up a sanding drum with a 50 grit roll. Turns out the cap to CRC contact cleaner is exactly the right diameter to use a template for a distributor hole cover. Was also able to put a shopvac downwind of the chips - still made a mess, but not as bad as it could have been. Thanks again everyone.
1987 Fifth Avenue - 512/518/D60
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