Datsun-240z Vs Fairlady-z432

[Gav240z]

Good lord, I want that.

[kats]

On 6/2/2022 at 5:27 PM, 26th-Z said:

Hear are some pictures of the exhaust manifold I found for 26th.  This was just after I had it ceramic coated and I was testing the fit.  It came with a metal shroud for the air filter pre-heater tube bolted to the manifold.  That's what those tapped holes are for.  It has full casting nipples.  Yours were ground off, Kats!  My thought about this manifold is that the flow and pressure is about the same as a set of custom headers.  I read some report that dyno tested the cast manifold against the headers for the gain in horsepower.

Thanks Chris, I see no dimples for air pipes , clean looking exhaust!

I finally found “ U98” , I still don’t know what car was designated for U98 but , Fairlady Z electronic fuel injected models  uses 14004-U9800 . 
At that time, US and Canada used different exhaust manifold for the fuel injected modes , that is a lot bigger one .Interesting! 
Kats
 

[kats]

On 6/3/2022 at 7:21 PM, HS30-H said:

Lovely E4620 tubular manifold, Kats!

Talking about the E7275 (later E7276) Race Option megaphone exhaust, a friend of mine owns this one. A rare survivor:

Thanks Alan, sharing the pictures of the megaphone exhaust system ! Super cool , and super rare . If someone starts making it , it would be a nice for people who wants to have a period-correct looking sports option parts .

By the way , for HLS30 and RLS30 , GRLS30 , what kind of exhaust manifolds  were listed on the competition parts catalog ? Were they also used for LHD Works rally cars? Or completely different one ?  Or could it have been made by some local exhaust specialists ? 
Kats

[kats]

Today I was shocked by this , a portion of an oil spray bar pipe was found from the oil pan . I couldn’t find out what it was first, but today I found that the pipe was the part of the spray bar . 
 

All the retaining bolts are loose,  I now understand this is why people want to get rid of it and going to have oil holes the camshafts and camshaft brackets.

But I want this to be an original.

Kats

Edited June 5, 2022 by kats

[bartsscooterservice]

55 minutes ago, kats said:

Today I was shocked by this , a portion of an oil spray bar pipe was found from the oil pan . I couldn’t find out what it was first, but today I found that the pipe was the part of the spray bar . 
 

All the retaining bolts are loose,  I now understand this is why people want to get rid of it and going to have oil holes the camshafts and camshaft brackets.

But I want this to be an original.

Kats

I found this picture of my e31 head. Looks like a revised version of the spray bar ? I dont know, thought I could share a picture.. maybe you know ?

[Gav240z]

5 hours ago, kats said:

Today I was shocked by this , a portion of an oil spray bar pipe was found from the oil pan . I couldn’t find out what it was first, but today I found that the pipe was the part of the spray bar . 
 

All the retaining bolts are loose,  I now understand this is why people want to get rid of it and going to have oil holes the camshafts and camshaft brackets.

But I want this to be an original.

Kats

Kats nearly every L24 I've worked on has had this happen. The brazing just seems to fail due to engien harmonics and then the spray Bar ends up jammed in the corner of the head.

I had to fix this on my white 71 240z which is matching #'s and original. I had a spare spray Bar I took out of the motor from HS30 00051. I think it's only a matter of time before that 1 gives up too.

I personally don't worry about originality for internal engine pieces that can't be seen like this. I will convert to internally oiled cam when I get the chance.

When these fail they cause premature cam wear I think. I can hear a ticking noise that isn't valve / lash adjustment related on my L24. Maybe I just need a louder exhaust?

[kats]

5 hours ago, bartsscooterservice said:

I found this picture of my e31 head. Looks like a revised version of the spray bar ? I dont know, thought I could share a picture.. maybe you know ?

Hi Bart , thanks for sharing it , your thoughts are just the same as mine , my #2156 has it , I realized it today . Tetsu , he restored my 240Z and he definitely thought this spray bar was much better than the original one . I will ask him later . But I think we can see the one in the picture looked later one , much simpler way to make . The early one has a heavy duty looks , more metal and more screws . 
 

The first picture is my #2156 , and the second picture is my spare L24 which was removed from 01/1970 240Z .

Kats

Edited June 5, 2022 by kats

[kats]

16 minutes ago, Gav240z said:

Kats nearly every L24 I've worked on has had this happen. The brazing just seems to fail due to engien harmonics and then the spray Bar ends up jammed in the corner of the head.

I had to fix this on my white 71 240z which is matching #'s and original. I had a spare spray Bar I took out of the motor from HS30 00051. I think it's only a matter of time before that 1 gives up too.

I personally don't worry about originality for internal engine pieces that can't be seen like this. I will convert to internally oiled cam when I get the chance.

When these fail they cause premature cam wear I think. I can hear a ticking noise that isn't valve / lash adjustment related on my L24. Maybe I just need a louder exhaust?

Thanks Gavin, I am thinking like you time to time . This car , I already am going to have fun with some modifications like non- emissions intake and exhaust, with a dual exhaust system, non-original radio , etc etc . 
I have got the “C camshaft “ which is designed as internal oiling system , and this has slightly sportier feeling profile. 
It will be a good choice for this broken oil spray head . 
 

The picture is my #2156 valve cover, Mr. K and Mr. Matsuo kindly gave their autograph on it in 2000 , just before departing Yokohama to attend ZCON LAS VEGAS .

Almost gone , but I still can see them !!

Kats

[240dkw]

Kats, this is what I did, happy to say that everything is still in place and grommets are still soft.

 

[kats]

3 hours ago, 240dkw said:

Kats, this is what I did, happy to say that everything is still in place and grommets are still soft.

 

Thanks 240dkw, I saw your work , you are genius! I like the idea of the splint for the pipe so much . Also the grommets are still doing good , that is a good news , almost three and a half years passed since you worked. Your car is a Canadian 240Z ? I see non emissions devices on your exhaust manifold.

Kats

[240dkw]

Yes, it is a 1970 Canadian car, a UN code. So it has none of the emissions equipment on it. 

[HS30-H]

On 6/5/2022 at 6:33 AM, kats said:

By the way , for HLS30 and RLS30 , GRLS30 , what kind of exhaust manifolds  were listed on the competition parts catalog ? Were they also used for LHD Works rally cars? Or completely different one ?  Or could it have been made by some local exhaust specialists ? 

I'm possibly not the best person to answer the question regarding what was available for the LHD models, but - as far as I am aware - the full range of Nissan Sports/Race Option parts, as seen in the Japanese market, were not readily available for buyers in Export markets until Nissan started issuing their catalogues in English.

Certain individuals, race and rally preparation shops and dealers got access to the Japanese catalogues through their own contacts and purchased parts privately (reportedly this could often be a struggle...) but it was not until the mid 1970s that this became a little easier. 'Datsun Competition' in the USA seemed to sell a mixture of Japanese made parts and locally-sourced products, and - for example - their 99996-E1140 'Competition Header' for the L6 was certainly a locally-made version with a single merged outlet rather than the typical Japanese 'binocular' twin-pipe outlet.

The Works rally cars usually had hand-made exhaust manifolds with the expected creeping evolutionary differences. They were always made in Japan and the cars arrived fully built and ready for the events, even if a little local modification (to suit driver and navigator preference) was performed locally by a combination of Works and satellite team personnel. Because of their position on the cars the manifolds are quite camera shy, but here are some I have captured:  

     

 

 

Edited June 6, 2022 by HS30-H
photo edit