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How forgiving is distributor position?

Old 11-04-2007, 11:19 PM
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Default How forgiving is distributor position?

Here's my deal. I'm trying to draw up an adaptor plate for my OBD1 swap to bolt the distributor to my head. I need to know, how far from the correct position can the distributor be physically rotated, while still being able to tune the correct timing in and not have it throw a code? 10, 30, 60 degrees? I just want to know how close I need the distributor turned on the head.

Also, can I clock the distributor 90, 180, or 270 degrees and just swap the wire positions by as much? Because it'd be a lot easier if I could mount it upside down.
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Old 11-04-2007, 11:21 PM
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Default Re: How forgiving is distributor position?

Depends on what you are using for timing.

I assume this is going on some weirdass engine that doesn't have a compatible OBD1 dizzy, but clue me in, what is it actually going as I've made OBD1 dizzys fit on a fair amount of engines they weren't supposed to.
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Old 11-04-2007, 11:24 PM
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Default Re: How forgiving is distributor position?

It's an A20A3 in an '87 Prelude. There are no OBD1 distributors that swap in, but the cam key and all that slots in just fine. Only thing is bolting it to the head.

The simplest way I've figured I could do it is with a plate that's counterbored to bolt it to the head, and threaded to bolt the dizzy to it. Only thing is, the distributor won't physically fit in the space because part of it interferes with a water pipe coming out of the head. Some people bend this, but I'd rather not and just clock it by 1/4 turn incriments till it fits.
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Old 11-04-2007, 11:27 PM
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Default Re: How forgiving is distributor position?

Originally Posted by Secondaries
It's an A20A3 in an '87 Prelude. There are no OBD1 distributors that swap in, but the cam key and all that slots in just fine. Only thing is bolting it to the head.

The simplest way I've figured I could do it is with a plate that's counterbored to bolt it to the head, and threaded to bolt the dizzy to it. Only thing is, the distributor won't physically fit in the space because part of it interferes with a water pipe coming out of the head. Some people bend this, but I'd rather not and just clock it by 1/4 turn incriments till it fits.
How similar is it to a b20a5? One thing I would suggest is try changing the cam cap that the dizzy bolts to with one that fits better.

Can you get a picture or MSpaint something so we have a clearer idea of the space constraints?
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Old 11-04-2007, 11:31 PM
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Default Re: How forgiving is distributor position?

It's not very similar at all.



There's a pic I could find quickly. That distributor is clocked, but the guy who did that also machined a spacer to fit between the distributor and the cam, which is designed to properly locate the distributor rotor. I don't want that trouble, I just want to bolt the stuff up and tune it.
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Old 11-05-2007, 12:06 AM
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Default Re: How forgiving is distributor position?

Use vicegrips then.
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Old 11-05-2007, 12:24 AM
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Default Re: How forgiving is distributor position?

You need one bolt not one lines up even notched out with a washer
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Old 11-05-2007, 01:25 AM
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Default Re: How forgiving is distributor position?

If you dont space the dizzy out ur going to need to fab something for that water neck. If your dizzy is clocked funny u could probably check ur timming with a light then adjust it in your timming maps, but i could be wronge :P
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Old 11-05-2007, 02:14 AM
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Default Re: How forgiving is distributor position?

Nothing is wrong with the neck there fools. he positioned the dissy with the machined spacer. Wha t the ---- do you man you vice grips? I dont think using vice grips will help me much. can I rotate the dizzy, then rotate the plug wires and tune the ecu to compensate for whatever duiscrepancy there is in the timing?


This is posted after 3 sixersd of Bridgeport INDIA PALE ALE (Best beer ever) and half a bottle of **** Creek (Best bourbon whiskey ever, ------S).
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Old 11-05-2007, 02:15 AM
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Default Re: How forgiving is distributor position?

Oh and chris you're a moron because the spacer would relocate ALL of the distributor moutning holes.
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