Rod shifter assembly and fuel tanks

Which drivetrain to choose, so many choices, 4-cyl? 6-cyl? NA? Turbo?
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JeffD
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Rod shifter assembly and fuel tanks

Post by JeffD » 29 Jul 2019, 15:05

Has anyone done a build with a rod based (as opposed to cable) shifter assembly? How do you plan to deal with the fact that the rod would have to go through where the fuel tank sits?

The Mazda setup I'm using is a rod assembly - and that in itself is no issue, I know how to make the rod do what I want, but it's a straight line through the fuel tank.

Midlana1
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Re: Rod shifter assembly and fuel tanks

Post by Midlana1 » 29 Jul 2019, 17:28

You could do just that, have a tube through the fuel tank that the rods pass through.

JeffD
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Re: Rod shifter assembly and fuel tanks

Post by JeffD » 29 Jul 2019, 21:32

I was actually thinking of notching the bottom of the tank, then running a pump each side notch, below the notched section. Then Y piece into a fuel regulator, and from there to an upgraded fuel rail... then the return line back.. Seems like an overkill solution though.

I just re-read what you said... *facepalm* A tube through the tank would actually be a lot easier...

JeffD
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Re: Rod shifter assembly and fuel tanks

Post by JeffD » 29 Jul 2019, 21:45

And of course, I've just realised the rod input will be on the wrong side of the motor!

Me thinks, an Arduino project with 2 stepper motors to rotate and move the rod forward and backward might be a better idea. Then I can set up a sequential shifter to control it. It can't be that much harder than a complex shift rod setup that has to go under or around the driveline, with multiple connections. :P

For some reason I have difficulty not thinking in "Overkill" mode.

ChrisS
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Re: Rod shifter assembly and fuel tanks

Post by ChrisS » 30 Jul 2019, 05:05

My last project started out with a rod shifter setup - quite similar to Midlana in that it was a transverse mid engine layout. Even with a pretty direct path it was never great. The main issue was bad angles due to the way the selector shaft in the gearbox had been positioned to suit the original FWD application. There was another version of that car that used a pretty complex setup of bell cranks to work round some clearance issues but by all accounts, it was always a bit of a faff to get set up properly.

I fitted a later gearbox along the way and converted to cable shift - so much better.

Is there a later Mazda part that could provide some suitable donor parts at the gearbox end maybe? I used a modified MR2 gearstick mechanism which worked well, and being metal, was easy to work with. Or just use Kurt's design!

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Re: Rod shifter assembly and fuel tanks

Post by ShadowCat38 » 01 Aug 2019, 09:53

See my build log. I recently had to deal with this. My cables haven't come it, yet, but i built an adapter that mounted to the transmission. My trans is a Mazda G5M used in U.S. Ford Escort ZX2s. Rod input is on the wrong side of my transmission, too.

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Re: Rod shifter assembly and fuel tanks

Post by JeffD » 06 Aug 2019, 17:47

So, this turned out to be a waste of a post - Everything points to me needing to comply AD 37/00 here in Queensland. That means, to simplify my build I need an engine from 2000 onward, and the Mazda is a 1996 model. It does simplify my shifter set up though, as I'm now looking mostly at Holden (Vauxhall) Astra's, which are cable shift.

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