4G63 wideblock + RX7 series 4 gearbox

avandull · Post by **avandull** » Tue Mar 08, 2011 9:35 am

1988 Mazda Carburatored B2600 with the Mitsubishi 4G54 2.6 motor.
Get a photo, or look at it before you buy. It should look like the one in my picture.

RallyStarion · Post by **RallyStarion** » Tue Mar 08, 2011 8:31 pm

Good to see others going down this track. Made the change to the Mazda box 4 years ago and have never looked back. Shift is smoother and cleaner, and box is much stronger. Inserted a set of ratios from Albins in Ballarat and it is the sweetest thing to drive, especially at high rpm and in the tight stuff. Have now changed diff ratio from 4.6 to 4.2 as 2nd gear is now a usable ratio.

If you have any question about the conversion happy to offer assistance where I can.

Brian

avandull · Post by **avandull** » Wed Mar 09, 2011 4:35 pm

Thanks Brian

Have you got any photos of the gearbox cross-member construction.

RallyStarion · Post by **RallyStarion** » Wed Mar 09, 2011 6:59 pm

Sorry no pics of X member but it wasn't that hard to do. I am led to believe that there are a few different rear housing configurations anyway.

Off memory I also had to put a 2 - 3mm washer under the pivot bolt for the clutch fork so it positioned it better on full throw.

Brian.

avandull · Post by **avandull** » Tue Mar 15, 2011 9:17 am

The fun continues with the construction of the gearbox cross-member.
First some rough sketches.

Cut out the steel, and bolted it in place to be tacked.

Made a second one for Rad while I was at it.

The next step is to put the bracing on to stop it flexing.

WANTSOM · Post by **WANTSOM** » Wed Mar 16, 2011 1:53 pm

should be right. dont think it will fall out.

Lunacy · Post by **Lunacy** » Wed Mar 16, 2011 2:19 pm

Group buy on the gearbox mounts? :beer

avandull · Post by **avandull** » Wed Mar 16, 2011 9:17 pm

Lunacy, the group buy king

Lunacy · Post by **Lunacy** » Thu Mar 17, 2011 4:13 am

avandull wrote:Lunacy, the group buy king

:beer Cant beat a gd group buy :beer

avandull · Post by **avandull** » Fri Mar 18, 2011 9:32 pm

I have put the gearbox in, and tested fitment. Fine tuned the cross-member. Drilled the holes so that they line up with the mounting points in the car.

Gave it a coat of paint. Now one more to go.

enthuzed · Post by **enthuzed** » Fri Mar 18, 2011 11:18 pm

Nice one, looks pretty solid now it's braced.

avandull · Post by **avandull** » Sat Mar 19, 2011 10:44 am

Should not move now. I am nearly finished oldies one today. I will send it soon.

avandull · Post by **avandull** » Sat Mar 19, 2011 6:23 pm

I finished oldies member today.

Then I got keen and cleaned it up a bit

A bit of paint.

It turned out better then mine!
The second time around is always better.

I then made the cover plate for the fly wheel.

I hooked up the slave cylinder. You are correct Redzone, the hose really does just bolt up.

I then started on re-positioning the shifter stick.

I have had a busy day!

JA83 · Post by **JA83** » Sat Mar 19, 2011 9:13 pm

tig welded mate? i like it when things are fabricated to a high standard! :beer

enthuzed · Post by **enthuzed** » Sat Mar 19, 2011 10:37 pm

Keep this going please. Shows very clearly what's involved. I'm very curious about how you're going to relocate the shifter.
Oh, and you might want to leave Old Fart's member out of it. :P

Austarion

4G63 wideblock + RX7 series 4 gearbox

Who is online