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S130 Fairlady 280Z 2 seater


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#21 luvemfast

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Posted 19 December 2009 - 08:42 PM

Last night I spent some time out in the garage changing the choke size on the Mikuni's, going from Φ32 to Φ36.
Its not as simple as boring out your current chokes. Apparentley there is some science to this car tech stuff. There is a radius, land and multi step taper to copy, exact.
To do this, I went over to see Lou Mondello who loaned me a smashed up Φ36 choke for me to copy (without the smashe up part  :P). I then modelled it up on Solidworks (PM me if you want the file) and machined the internal details on the CNC mill using high speed machining principals, small cuts, high speed. Then cut the external diameter on the wire cutter.
Fitting proved to be not as simple as I had hoped. One would say that there more than one type of PHH Mikuni design. The one supplied was slightly different, being that the slot to go around the accelerator pump was different and not directly opposite the location spot.
Meaning to fit them I had to mark the screwjack/retaining screw point and drill a point by hand with a pistol drill. Hairy, going slightly too deep would see the choke being binned. Once this was done, it was a matter of putting it all back together.
The best part was that it started and ran at the end.
Will test drive it tomorrow, hopefully.
Pics show a diect comparison of Φ32 and C36 chokes fitted.

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#22 luvemfast

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Posted 19 December 2009 - 08:56 PM

Also worked on air flow through the radiator last night.
$12 worth of Aluminium, a jigsaw, pop rivets and self tapping screws.
Mind you this was done until 1am, apparentley noise travels further at night and I was in the dog house for being noisy. But thats the way it goes, when you want the car to be cooler!
Test tomorrow  :)

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#23 luvemfast

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Posted 19 December 2009 - 09:06 PM

Here's some random shots of work missed from the forum.
Seat, harness and oil catch can.
The seat needed to be on rails so that my wife could drive it, if she wanted. I'm 6'5, shes 5'1. So I got a spare set of rails from the wreckes and modified them so that I could sit low enough while wearing a helmet and put it as far back on the rails as I could. And guess what, even then my wife can't reach the pedals when all the way forwards, classic.

The oil catch can is just a copy of something I saw on the internet, coz I don't have much of an imagination. Its 3mm aluminium that sits behind the passenger front wheel on the footwell/firewall. It was needed after taking the factory EFI off and fitting triples. I cut and folded it up, then gave it to my mate who said he'd love to learn how to use the tig welder at his work. Once I finished teasing his crappy welds, I tested how much it would hold. Do you think that 4L will be enough? :o Looks and works good enough to me.

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#24 Zedman240®

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Posted 19 December 2009 - 09:52 PM

Four liters is more than enough...I just go by sump capacity to be safe. L series is only 4.2 but who's counting?

#25 bluerat

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Posted 21 December 2009 - 08:15 PM

Great read Simon, keep it coming! Your right about the chokes, they can be tricky to get to the right shape, a mate spent ages working out how to do mine and making up a tool for the lathe. I thought your old 535is might of been the car my wife has now, It came from Melbourne, but we dont have a sun roof. Was it a manual?

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#26 luvemfast

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Posted 22 December 2009 - 06:06 AM

thanks bluerat
Chokes would have been fine if I had a correct sample to copy.

I thought your old 535is might of been the car my wife has now, It came from Melbourne, but we dont have a sun roof. Was it a manual?

Yes, mine was a manual. But thats not it, unless previous owner the took sunroof out ???



#27 Lynton

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Posted 22 December 2009 - 10:55 AM

Interesting read Simon I actually remember back in 1968/69 I joined the NDSOC I think back then it was the DSOC the days when Dennis McNally was there, Rex Broadbent, Gordon Dobie etc; all fades away a bit now but I Had a Datsun 1600 sports Fairlady, and then a Datsun 2000 Sports and I always remember Gordon Dobie saying I should never sell the Fairlady's because of their rarity and 240z/260z's were a dime a dozen and they would never have any value in comparison....now look!! Anyway motorkanas were at shopping centre car parks or Casey Airfield, and Calder race track that was about the extent of it. You were right about the club culture change from rag tops to tin tops it was difficult as I recall but also ended up being a fairly rapid change and still to this day the cars have a different personal support base of individuality from the Zeds but they were awesome cars and they certainly kicked butt back then but they were no less respected than the Zeds are today I recall they were referred to as Jap crap even during their winning streak and its still pretty much the same to day only the enthusiast support base has increased and the restorations are putting them back into a 60/70's focus of something the motor industry can be proud of.. ...keep it coming it is great to see the new generation of Zed owners and their developments.
Lynton :P

#28 luvemfast

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Posted 22 December 2009 - 11:14 AM

Lynton, Denis is my godfather (haven't seen him in a while though) and mum and dad still catch up with the Dobies every now and then.
Any old car that is loved and has been restored deserves respect........ Except Lada's! :P

#29 hunterzed

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Posted 22 December 2009 - 11:22 AM

Hey Lada's need luvin too. lol

#30 luvemfast

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Posted 09 March 2010 - 08:52 PM

Thank goodness my Z spends most of its life up on stands the height of a four wheel drive. With all this rain and flooding we've had here in Melbourne.
Thought that some prepwork for an upcoming sprint meet at Calder park should be done.
Getting the Carbies tuned was high up the list, but haven't gotten there yet.
While changing the gearbox oil, it is expected to find some teenie tiny bits of steel filings on the magnet on the sump plug. We found large chunks!
So gearbox out and off to Hollinger to be rebuilt. My best buddy works there and I have been waiting for years to take my box there. So no time like the present.
After pulling it aprt , we found that the main bearing was rooted. Maybe you've seen the pic that Fev took of it when it wasn't looking. Aprt from that, it looked really good inside and the experts were happy to reuse all the gears and synchro's. Sandblasting and hot washing of parts that can be to make it look pretty and new bearings have been ordered. I'm looking forwards to get it back together.
Will post some pics when I get some.


#31 hunterzed

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Posted 09 March 2010 - 09:41 PM

Hey Simon, good to see there wasn't too much of a problem with the box. At least you'll be back up and running fairly soon and fairly cheap too. Good luck.

Steve

#32 luvemfast

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Posted 11 March 2010 - 03:01 PM

Been playing around with an idea for a short shifter while the box is out.
Standard pivots 40mm from the ball end on the gearstick, this design pivots 90mm from the ball end.
Only shortens 1st-2nd, 3rd-4th & 5th- reverse direction though.
Pretty simple to do though, only 3 new parts and 2 new fasteners. If it works at all that is!

How far is the standard gearstick top from the gearbox? My old is cut shorter, but would make it factory height again.

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#33 Zedman240®

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Posted 11 March 2010 - 04:20 PM

Simon, just make sure your gearbox is ok to handle the quicker shifts!

#34 luvemfast

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Posted 11 March 2010 - 05:43 PM

Simon, just make sure your gearbox is ok to handle the quicker shifts!

I asked it and it said ok.  :P

How do you propose I do that?
Its being reco'd, what more can I do?

#35 Zedman240®

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Posted 11 March 2010 - 06:28 PM

Being a gearbox 30+ years old and never being designed for a short shifter, I'm no expert but something may wear prematurely. If you had a gearset made for it, that's another story. You'd be the first I know of who have made something like this so I guess we will find out how it all goes..

#36 luvemfast

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Posted 19 March 2010 - 11:28 PM

Well tonight has been fairly productive as I have a drivable Z once more.
The gearbox was finished off Thursday night, I had a hard on all day thinking of getting layed.... under the car to fit it.
Everything went smoothly and I kept waiting for something to go wrong so I'd have to pull it out and start over, but it never happened. Tomorrow is the big test day for the original reco'd gearbox. I've been running a 260Z gearbox in it all this time, so will be interesting to see the difference.
The short shifter hasn't been made yet, so obviosly it hasn't been installed.

While we were under the car tonight, dad moved some cobwebs and shinned the torch under where I had been working and discovered a big redback spider..... right next to where my hand was. 
Talk about lucky huh? I squished it with some pliers......

My mate who works at Hollinger, and helped me rebuild it, asked "If I minded someone else fu*king around with my box while I wasn't around?" To which I replied "Nah man, as long as you lubricate the shaft before engaging the fork, don't damage any of the ring gear and leave it nice and clean when finished after your play. I'm cool with that." Sad but true story.
Here's some pics of the box.....

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#37 Lurch ™

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Posted 19 March 2010 - 11:40 PM

Looks good Simon :)

Hrmm, your mate at Hollinger... also able to rebuild Datto boxes with ease?
It isn't 'Don' is it?

#38 luvemfast

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Posted 19 March 2010 - 11:48 PM

Hrmm, your mate at Hollinger... also able to rebuild Datto boxes with ease?
It isn't 'Don' is it?

Don's in the fitting room I think, my mate's name is Brad and he works on the CNC lathes.
But as soon as you take in an old gearbox, they all want a look at it, same as when Brad took his Saginaw 4 speed from his Pontiac Firebird. Peter Hollinger was very interested in looking and comparing, obviously his boxes are better.

#39 benny

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Posted 20 March 2010 - 07:54 AM

hey simon,

looks great!!! met your dad the other week, (caught him peeping over the fence checking out whats in my carport lol.. great guy!!

Ben

#40 luvemfast

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Posted 20 March 2010 - 09:15 AM

hey simon,

looks great!!! met your dad the other week, (caught him peeping over the fence checking out whats in my carport lol.. great guy!!

Ben

Yeah, he told me about that Ben. He lives a stones throw away from you.
He has a habit of checking in peoples yards for cars, passed it on to me. Has his eye on an R32 between your house and his.





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