Datsun-240z Vs Fairlady-z432

[HS30-H]

5 hours ago, kats said:

They are for Z432, upper one is a spots option and the lower is a STD. And they are both hand made replica! 
To be looked like genuine one, they will be sand-blasted before installed. I can’t tell it if I weren’t told that they are replica.

Wow. Excellent!

[kats]

I am surprised (maybe only me) that the clutch master cylinder applied for Z432/Z432-R and LHD car was used up to Aug 1974! For the US, it is from the beginning of 240Z to early 260Z. Now I see why I have got mine from the US.

In Japan we have only approximately 420 Z432( 380 Z432, 30-50 Z432R ). The cylinder E4100 to 4201 is rare to see ( I guess other Nissan cars were sharing the cylinder body but) here in Japan. HLS30 and RLS30 were approximately 240000 cars up to Aug 1974.
 

Why Nissan used E4100 suffix for the cylinder applied HLS30 and PS30 chassis at the beginning? E4100 was the suffix for S30 ( RHD, L20 model) originally. It should have been used for S30 and could have been used for HS30 body.
If I were the man who categorized the suffix, I would have E4200 (Z432) or E4400(HLS30 Euro) or E4600(HLS30 US and Canada ) for the cylinder when the factory started making them.

Anyway, for RHD car, the clutch master cylinder has suffix of E4300 which was originally designated for HS30 ( RHD, L24 model).

I can’t stop myself being excited that the clutch master cylinder had the suffix E4201 for early 260Z until August 1974.

Note the red marking of the illustration of the E4100 to E4201 is not correct. This port should be the other side. By the way,Skyline GTR up to December 1972 had the same port on this illustration.

Kats

 

 

Edited April 14, 2023 by kats

[kats]

Hi, Alan and xs10shl or other people, can you find out what it is? 
 

A bolt for fixing the transmission case. The bolt’s head has a hole, I guess it should be used for a wire securing. But how I can do that? Two bolts adjacent each other should be tied? Or any other way?

 I have got this transmission yesterday, I made a gamble for this. The seller said this is Option 3, stand-by duty for a racing team. And he heard it came from Speed Shop KUBO, really?
I rotated the rear end flange to see how much turn does the input shaft make. The seller and I confirmed it is close to the Option 3 ratio.

Without any internal pictures, but I jumped in. I am scared to open the case, let’s see what I will have.

Kats

[Patcon]

Yes, typically they are wired to each other

Sometimes they are all wired in series.

I don't know if the bolts are available already drilled. I know many times racers will drill them themselves to make safety wiring possible. I don't know historically but many modern racing classes require some level of safety wiring

[xs10shl]

Looks like a nice purchase.  What A-box ratios are option 3?  My rally car has option 1 (Mid-Close), and I'm aware of option 2 (Ultra-Close) from my reading materials.  Sounds like there are more ratio options? 

Patcon's picture is a good illustration as to how they'd be wired together.  I don't know that the bolts were drilled that way from the factory, but one can probably purchase them that way from a vendor.

[HS30-H]

7 hours ago, kats said:

A bolt for fixing the transmission case. The bolt’s head has a hole, I guess it should be used for a wire securing. But how I can do that? Two bolts adjacent each other should be tied? Or any other way?

 I have got this transmission yesterday, I made a gamble for this. The seller said this is Option 3, stand-by duty for a racing team. And he heard it came from Speed Shop KUBO, really?

That's a nice purchase, Kats. I am jealous!

Quite possible it did indeed come from SS KUBO. Kubo san acquired many parts from Tomei, Scuderia Nissan and the Works team over the years he was involved in racing and afterwards. He picked up a lot of rare parts.

There's a small mention of lockwiring in the first Nissan Sports 'Yellow Book' from 1970. This was for the oil pan bolts, but - as Patcon mentions - this was common in aviation and specialist machinery preparation since the beginning of the industrial revolution (I've seen it used on steam pumps from the early 1800s...). Typically the bolts are locked against each other to stop loosening from vibration. Here's an example from a Works rally L24:

   

[kats]

On 4/23/2023 at 10:03 AM, Patcon said:

Yes, typically they are wired to each other

Sometimes they are all wired in series.

I don't know if the bolts are available already drilled. I know many times racers will drill them themselves to make safety wiring possible. I don't know historically but many modern racing classes require some level of safety wiring

Thank you so much Patcon, 

The one in the picture all wired in series is super! I have never seen like that before.

I want to do it beautifully, use a drill to twist wires?  
 

Kats

[Patcon]

23 minutes ago, kats said:

Thank you so much Patcon, 

The one in the picture all wired in series is super! I have never seen like that before.

I want to do it beautifully, use a drill to twist wires?  
 

Kats

I think they make a special set of pliers to do it...

I couldn't paste in an image...

Google "safety wire pliers aviation"

Edited April 24, 2023 by Patcon

[Patcon]

It's what every good aviator needs in his toolbox 😁

[kats]

5 hours ago, Patcon said:

It's what every good aviator needs in his toolbox 😁

Oops! I must have it. Ha ha!

Kats

[kats]

On 4/23/2023 at 11:43 AM, xs10shl said:

Looks like a nice purchase.  What A-box ratios are option 3?  My rally car has option 1 (Mid-Close), and I'm aware of option 2 (Ultra-Close) from my reading materials.  Sounds like there are more ratio options? 

Patcon's picture is a good illustration as to how they'd be wired together.  I don't know that the bolts were drilled that way from the factory, but one can probably purchase them that way from a vendor.

Hi, in March 1971 Nissan Race & Rally manual introduced Option 3 gears, please see the attached picture. It says “Option 3 is for a short distance race, Option 2 is for a long distance race. Option 1 is for a small course” 

By the way GTR’s first race ( May 3rd 1969 at Fuji Speed Way) was something unusual. Toyota 1600 GT finished first GTR second. Everyone expected GTR would have won firmly even Toyota team thought the same. After the race, a few days passed, the GTR became a winner because the Toyota 1600GT had obstruction. The GTR had a Option 2 transmission. 

A general manager of the team Mr. Aoji said “the transmission gearing was wrong for freshman. We thought start is only once in the whole race. But we should have taken it more seriously”

As we see the data Option 2 gears looks like omitting 1st gear. It requires certain techniques especially with S20 engine. You can go faster if you can maintain higher RPM.

The race officials announced specific rules two months before the race, “ drivers who won Nippon Grand Prix etc can not enter this race”

So Nissan team had to train freshman  immediately.

Kats 

 

 

 

[kats]

Thank you so much Alan,

I have been looking for the picture of wiring of the bolts for our engines, just fantastic!

 I think oil pan bolts can’t accept much torque so wiring is a good backup for securing.

And thanks for educating me about engineering back ground. Now I am interested in how did mechanics do for their military airplanes and ships WW2 etc. 

Please stand by for further details, I will be so happy if all the gears are intact and have correct number of teeth as Option 2 gears. If not, I will still be happy because it is FS5C71A anyway! And I can dream about Kubo san’s relationship with this one.

Kats