1971 LS1 240Z aka 570Z

[RB30X]

My Zed got to be in a car show as part of the Townsville 400. It was an awesome weekend. We got to do a lap as part of the drivers parade. Would you believe I only got one photo of it on the track.

















Relocated coils.












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Im moving from Townsville down to Gladstone to start a new job. I've been at my current one for eleven and a half years so it's a big move but one that I hope will pay off. I've been driving the zed to work as a daily for a while as I know it will get a lot less attention for a while after the move. That's not to say I haven’t been planning things. Since my clutch started slipping on take offs, I have been considering my options.

[nomedia="http://www.youtube.com/watch?v=4yXMK3xcBoE"]Zed at drags - YouTube[/nomedia]

Because the car is so light, I don’t need a hard core replacement clutch as this will ruin drivability and give me a tougher pedal. The LS7 clutches sound perfect and I will be getting one as soon as I'm set up in my new place. Replacing this for me will involve removing the engine and gearbox together so that should be fun. I have been collecting parts to do a few things while the engine is out and separated from the gearbox. Apart from a new clutch, I’ll have a new slave cylinder/throw out bearing and new spigot bearing to go in. I think my spigot is dying and the extra drag on the input shaft is keeping it turning during gear changes. A new bearing here should see my changes improve. A new braided line from the master to the slave should improve pedal feel too.

My rear main has always had a leak so I’ve got a new crank seal to go on. Hopefully that’s all it is. I’ve got a new timing chain to go on as well as an under driven balancer. I also bought a used LS1 oil pump off ebay for $1 + $10 postage. I’ve used this spare to carry out a few mods commonly done to the LS1 oil pump. Porting the inlet and exits of the pump and shimming the relief valve. Easy to do, and the extra flow may save me in on track event. All this collecting parts has me thinking about a bigger cam now. Just a small cam……. I’m pretty sure I’m going all Bogan again now. I don’t need any extra power. This thing pulls like a steam train as is, but its not enough any more. Do I install a cam while I’ve got the engine out? I’ve got that spare set of cylinder heads too. I’m thinking of given them a tickle to smooth out the ports and valve guides and port match the flange surface. Then get them shaved a bit to ‘up’ the compression. I’ve got the better valve springs to go on yet, as well as the LS6 injectors, and the custom fuel rail. I’ll probably order some ARP head bolts and flywheel bolts etc to keep it all together. Man I’ve got so much to do. I cant wait to move down there and get into a house with a shed so the fun can begin. I also have to a bit more to strengthen the chassis too. Until then….

[RB30X]

I finally pulled my finger out and ordered a clutch.
This of course ment I had to pull the engine and box out to replace the clutch.
I gave it all a gerney and I will endevour to fix some oil leaks while I'm there.

[Toddler78]

man that clutch looks fraged!. Im enjoying this thread in fact I might go back to the start and reread the install

[Deanosh]

What clutch did u end up getting?

[RB30X]

I got talked out of an LS7 clutch and went with a level 2 ceramic from Clutch Industries. I searched on here for others with these clutchs and there was a couple of mentions but not a lot.

[Toddler78]

looking at the engine bay have you considered tilting the radiator and running a OTR or isnt there enough room

[Mick1]

Great conversion, power to weight. Would hav good balance with the motor behind the front wheels, yes?

Needs a 1/4 blast!

The Clubbie's gunna need some serious work to catch this one.

[RB30X]

looking at the engine bay have you considered tilting the radiator and running a OTR or isnt there enough room

I havent had a good look but that is always an option down the track. Isnt much room though.

Great conversion, power to weight. Would hav good balance with the motor behind the front wheels, yes?

Needs a 1/4 blast!

The Clubbie's gunna need some serious work to catch this one.

Front to back is 50:50. Power to weight is crazy even with bolt on only power.

I wont even bother getting the clubby this fast.

I started by removing the old clutch and gerneying everything so I could see. I've had a new pilot/spigot bearing to install as well as a new slave cylinder and bearing. The rear main was leaking so had one of those to put in as well. I was going to use this oppertunity to throw in some tougher valve springs and a new timing chain but I didnt think I would make it in time so I have concentrated on the things I need to get done to run it down the strip in two weeks time. I was really happy with how everything went together today. I didnt have a puller so I need to grind the old spigot bearing out with a porting tool. The new one went in nice and evenly. The rear main came out ok, and the new one went back to the housing fine. Was a little tricky getting it back over the crank but I found it easy to run a cable tie around the seal as I pressed it over the crank to keep the seal surface facing the right way.

A few hots spots


Changing gears should be a bit easier with a new one of these






New spigot bearing


New rear main


Taking water pump, balancer and front timing cover off for seal replacement




New slave


I extended the clutch fluid 'in' fitting so the braided hose didnt have to bend on such an angle to get to the master cyclinder.


I just have to get the right fitting to go into the slave on the fluid 'out' line and I will hook up a remote bleed line. It looks like an M8 x 1.25 or a common bolt thread.

[BigFella]

this is prob my most fav car on these forums. Its just a classic sports car with every thing from great classic looks to fantastic power and grunt. Well done on such an interesting and great build.

[RB30X]

Thanks for the comments.

Probably boring everyone with the photos but my new clutch and lightened flywheel arrived yesterday. Even came with a new bearing for the slave and pressure plate bolts, nice. All ready to go for my next days off.

[RB30X]

[RB30X]

Well its all back in but I had huge issues with getting the slave to bleed. I tried several techniques and went through almost 1L of brake fluid, but I ended up getting it to work by changing the travel of the master cylinder piston. For some reason there was a huge difference between the what the factory clutch and this one needed.

I can say that these clutches are great. Factory pedal feel, no shuddering or noise or button like feel. You'd be hard up telling it wasnt factory. Until you do a big launch with it

[GEN III VX]

Very nice conversion.Im a big fan of the 240 and an LS1 is a nice conversion in it.Has the handling changed at all with the V8?

[RB30X]

Cheers.