With no mods. Mods are only need when putting the front case on earlier gearboxes. CA18 and SR20 gearboxes are the same series (71C).

Hey supafato,so when u say interchangeable do u mean that the front bellhousing can be taken off with the bolts in the centre of the casing and bolt the ca onto the sr with slight mods.

Mcdat the ca18,sr20 rb20 box are pretty much the same all the bellhousing are interchangeable, the rb25 box is stronger and takes more work cutting/shutting the bellhousing, if your going for all that power get a rb25 box to suit and get a jim berry clutch ect like Andrew has

Hey mate the rb less work or the sr less work?

Andrew,
How did she go without Caltrac, thoughts on running with or without on the track?

Bryan

The gearbox that broke was a second hand Jap import box. I didn't break the gears was the Syncro detent springs that had popped out making it crunch gears. I had also broken the 3rd 4th selector fork. I now runnign a brand new box with PPG billet selectors without issue I have just finished rebuilding the old box so have a spare as well. If you go the RB box yu will have to modify teh belhousing and a few other bits and pieces of you go the OSG the SR and CA gearbox is basically the same. would be less work in my opinion. Really depends on the power you are going to make and how you treat it

Hey mate I have a question about your gearbox,was it brand new when u put it in and you wrecked it quickly or was it a low km import item?I ask because I can decide what to put in mine brand new rb25($2899) or go a sr20 with os giken gearset rated at 600hp for roughly $3700.

Quote:

When Andrew sold it to me it was running Avgas and tuned to 22psi, making 230rwkw.

I had it retuned to 15psi IIRC on pump 98 and made 180rwkw. Felt very tame compared to the previous 230! Pretty sure I sent you the laptop & serial cable with the other tune file saved on it. All you have to do is load that up and fill it with Avgas...

Personally, I'd retune for e85 these days. You should gain an extra ~30rwkw on top of that and it will run cooler. Can't remember the injector sizes, but assume you'd need to upgrade them to run e85.

A picture of the ute at powercruise

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Here is a bit of Incar having some fun the other week. Was having gearbox issues that i have since fixed.
https://www.youtube.com/watch?v=TAwJpUAJqxI&feature=youtu.be