hei cap size - Team Camaro Tech
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post #1 of 5 (permalink) Old Sep 29th, 09, 05:22 AM Thread Starter
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Dave
 
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hei cap size

Can someone measure the size of an hei cap for me? I am trying to see if one will fit in my 69z28 before i buy one. I need to know the width at the top and bottom of cap as well as the height of the cap from distributor mounting surface. I am trying to replace small body msd. Thanks
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post #2 of 5 (permalink) Old Sep 29th, 09, 11:26 AM
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Russ
 
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Re: hei cap size

This is from a brand new Summit billet HEI dizzy sitting on my workbench.

Bottom of cap width = 6.100", across opposing cap lock down hooks.
Top of cap = 6.375" includes the HEI wire connector (extends 1.025" from perimeter of cap edge)
Height from bottom of mounting base (where dizzy sits in engine) to top of cap = 7.500"
Fyi. The vacuum advance unit extends 2.750" off the body of the dizzy.

Russ (RJ)
The Garlic Capital, Gilroy,CA

(sold June 15,2014) 1968 RS convertible that is not quite stock

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post #3 of 5 (permalink) Old Sep 30th, 09, 07:50 AM Thread Starter
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Dave
 
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Re: hei cap size

Thankyou. Im torn between trying to fit an hei and having minimal firewall clearance and trying the dui small cap hei. unfortunatley no one has the dui that i know of.
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post #4 of 5 (permalink) Old Sep 30th, 09, 08:39 AM
DjD
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Dennis
 
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Re: hei cap size

There are several small body dist's available, I am very happy with the www.davessmallbodyheis.com that I have been running for years. You send him a points dist and he rebuilds it as an HEI with a curve designed for your combo and sends it back. MSD also makes an all electronic small body that you can dial in the curve with switches, it also has a supplemental electronic advance that replaces the vacuum advance... You have choices Dave!

...Dennis

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post #5 of 5 (permalink) Old Sep 30th, 09, 09:16 AM
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Russ
 
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Re: hei cap size

My old motor already had an Accel HEI in it and the firewall had been dimpled so my direction with the new motor was easy. After talking to a few buddies I picked up one of Summit's blueprinted HEI's that are claimed to be good to over 8,000 rpm. I'll be happy if it works to 7-7,500 rpm range.

Russ (RJ)
The Garlic Capital, Gilroy,CA

(sold June 15,2014) 1968 RS convertible that is not quite stock

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