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That looks like a great build!

Its a massive shame its in sweedish, becahuse there looks like there is a huge amount of information there that seems interesting and quite helpful too!

Just a couple of questions,

Whats the car going to be used for?

And why stick with the CA and not go SR?.. I suppose less poeple run CA's so its a little more different..

Yes, you are right. There is a lot of information about how to rebuild gearboxes, upgrade the brakes, engine tuning, chassis tuning and so on. The information I put up here is just a short pick of it.

I use the car mainly on the street and from time to time on tracks and 1/4 mile. It is great fun. When I lived down in France, I once took it to Monaco and drove slowly by the Casino. It got more attention than many of the Fers, Lambos and Bentleys. I like! :(

The Ca is capable of a lot of power when tuned correctly. My earlier aim was 600BHP but now I am increasing it up to some +700BHP. Most of the SR's here in Sweden end at some 500BHP and that engine has a lot to wish for when it comes to its factory internals (as an example, I am no friend of the SR head and its twin lifter cam lobes).

The CA has also things that need improvement. The crank is forged and ok but the pistons doesn't last when reaching +300BHP. The Rods give in at about +400BHP and the oil cooling suck.

So...I did lots of hardware tuning to make a massive improvement on the CA's durability and many other tweaks to get it up in power.

700HP!?!?!?!?!?!

out of a CA!?

How often do you intend on rebuilding it!?

It is not a question about rebuilding. It is all about doing it the right way from the beginning (using high grade components) and keeping a high level of normal service (oils, filters etc).

This is how I rebuilt a Z32 gearbox to fit my car (200sx S13 with ca18det).

The good thing about it is that you can reuse the nice clutch you already invested in for your S13. I have a twin disc OS Giken clutch, bought for my S13 gearbox. Both gearboxes have the same dimensions on the ingoing splined shaft, release bearing, sleave etc. This makes it an absolute fit. The gear ratio is slightly higher. My car had before a top speed of 282km/h at 7800rpm. With the ratio of the Z32 gearbox and new tyres it will make aprox. 305km/h. Hope you like it.

Clutch: Same as S13 (clutch, bearing, release sleave, starter motor, flywheel)

Weight: A bit heavier because of internal dimensions

Length: A bit shorter (reuse the yoke from the Z32 and the rear part from theS13 and make a new, longer prop shaft)

Gear ratio: A bit higher (~5%)

Shift stick: Reuse the one from Z32 or buy a new short shift

Welding in cast aluminium: You need a TIG or go to a welding shop (sand blast the weld area to make it clean and easier to weld)

Z32 original gearbox from a Twin Turbo 1994

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Disassemble the clutch housing (Z32)

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Parts to remove to disassemble the clutch housing. Not shown are the screws on the outside (remove), attaching the cluth housing to the gearbox.

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Remove all screws around the cover and carefully lift it off

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Remove both snap rings and the stopper ring

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Be careful not to lose any important washers or shims

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Important! First remove the screw, spring and ball before removing the complete interlock assembly, the ball might fall into the gearbox.

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Before you disassemble the clutch housing of the S13 gearbox, you have to make a centering device. Use a plexi glass plate (10mm) and drill a 16mm hole in the centre, put the plate over the shaft (snug fit) and carefully drill 4 small holes exactly in the centre of the holes where the gearbox is attached to the motor. Remove the plate and carefully drill the holes just as big to get the screws in

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Result

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Remove the clutch housing from the ca18det S13 gearbox. It is more or less just to remove the screws on the outside of the clutch housing, remove the cover and one snap ring.

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Remove the snap ring under the cover

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Comparision between the both gearboxes. One is useless over 350-400Bhp, the other last well over 1000Bhp and more.

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Use an angle cutting machine and cut off the flange from the S13 gearbox ca. 50mm, take it to a machine shop and have it grinded down to 45mm. Important to get it absolutely flat and equal all around.

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Use an angle cutting machine and cut off the flange from the Z32 gearbox ca. 40mm, throw away the flange and take the rest of the clutch housing to a machine shop and have it grinded down to 355mm. Important to get it absolutely flat and equal all around.

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Both parts after grinding, cleaning and reattaching the clutch housing on the Z32 gearbox

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Put the S13 flange snug to the Z32 clutch housing and attach the centering plate with four screws

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Side view

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Top view. Important to align and rotate them like on the picture

If you do not own a TIG-welding machine, you go to the machine shop again and have it carefully welded together, both from the outside and the inside

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Reuse the shift stick bracket from the Z32 gearbox. You have to cut out some small triangles from it, bend it to a Z-shape to fit the S13 under body and then weld the cut outs together. (borrowed picture)

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The new short shift

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A small change of shift stick position compared to the original (borrowed picture)

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A plate to cover the hole at the shift stick (borrowed picture)

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A bracket to hold the gearbox in place (borrowed picture)

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Aligning the gearbox with the rear axle. Put a steel tube in the gearbox, aim it towards the centre of the rear axle flange and find the final position of the gearbox bracket. (borrowed picture)

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Side view (borrowed picture)

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Front view (borrowed picture)

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The prop shaft. Mount the Z32 yoke in the gearbox and the original flange on the rear axle. Measure the centre distance between the loops in the yoke and in the rear flange. Use this measure and go to your local prop shaft supplier and have him to make your new prop shaft. The shaft rotate at about 10.000rpm at max speed so it has to be dimensioned for the forces and also balanced.

  • 2 weeks later...

Device to correct the speedometer. Needed because of the different speed signals and gear ratio in the Z32 gearbox. It also handle changed wheel/tyre sizes etc. The sensor signal to the speedometer is handled to show the correct speed on the speedo. It also show the max speed from the latest run by pressing a button.

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  • 3 weeks later...

Today I picked up the new turbo from Logo31-3.gif.

Without doubt they are skilled experts in the world of turbos. Dick has made an excellent job. There is nothing about this SX700S that is standard. Top Class Dick! 1000 cheers!

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