Twin dizzy build
03-19-11, 03:41 PM
#26
Psalms 37**25
very nice...my buddy just sent out his two old school points distributors for an electronic upgrade. What are you doing about your electrical system?
Are you running 6MM apex Seals?
Are you running 6MM apex Seals?
05-03-14, 08:03 AM
#27
Junior Member
Join Date: May 2014
Location: Western Australia
Posts: 6
Likes: 0
Received 0 Likes
on
0 Posts
I knew the twin dizzy had more bolts than all the newer motors. But it's actually only by one tension bolt. Which is fine since it's right about where I would put my PP anyways. So It would become obsolete anyways.
But one thing I wasnt ready for, two of the tension bolt holes do NOT line up properly. One just below the spark plug area, and one just below the exhaust port. If I look through, only about half of each hole is visible.
Here's a pic to point out the areas:
On a side not, the twin dizzy tension bolts are much thinner also. The twin dizzy tension bolts are just under 7mm, and the 13b tension bolt I measured was around 9.4mm. But the thread and pitch at the end is the same. Obviously much less thread, but none the less the same.
But one thing I wasnt ready for, two of the tension bolt holes do NOT line up properly. One just below the spark plug area, and one just below the exhaust port. If I look through, only about half of each hole is visible.
Here's a pic to point out the areas:
On a side not, the twin dizzy tension bolts are much thinner also. The twin dizzy tension bolts are just under 7mm, and the 13b tension bolt I measured was around 9.4mm. But the thread and pitch at the end is the same. Obviously much less thread, but none the less the same.
05-05-14, 09:36 AM
#29
Junior Member
Join Date: May 2014
Location: Western Australia
Posts: 6
Likes: 0
Received 0 Likes
on
0 Posts
Ok i think I'm going to just not run the two bolts that don't align and fill the holes with epoxy steel. Hope she holds up
05-05-14, 11:33 AM
#31
Rotary Freak
The holes that don't line up you can drill to suit the plates [irons ] I have fitted 12A rx7 plates on to a 10A rx3 motor and used a single dist electronic unit as well. Plus don't use the wasted bolts get some rx7 bolts ,the wasted ones don't hold tension as well and tension bolts to 30ft lbs not 22 which mazda recommend
05-06-14, 10:16 AM
#32
Junior Member
Join Date: May 2014
Location: Western Australia
Posts: 6
Likes: 0
Received 0 Likes
on
0 Posts
The holes that don't line up you can drill to suit the plates [irons ] I have fitted 12A rx7 plates on to a 10A rx3 motor and used a single dist electronic unit as well. Plus don't use the wasted bolts get some rx7 bolts ,the wasted ones don't hold tension as well and tension bolts to 30ft lbs not 22 which mazda recommend
What do you mean wasted bolts? Sorry
05-27-14, 04:34 PM
#33
Full Member
Join Date: Feb 2008
Location: tampa'florida
Posts: 152
Likes: 0
Received 0 Likes
on
0 Posts
twinn dizzy rebuild
if you need any vintage partys i have a few in box rotors , steel plates , housings also have apex seals bolds corner seals distributors front covers call me with needs 646 701 2130 also have a twin dizzy crate motor from mazda
06-03-14, 12:39 AM
#37
im working on this same type of project i used a spare iron to redrill the housings.
https://www.rx7club.com/old-school-o...-887405/page4/
https://www.rx7club.com/old-school-o...-887405/page4/
Thread
Thread Starter
Forum
Replies
Last Post
HalifaxFD
Canadian Forum
126
05-09-16 07:06 PM
