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Ah, the super elusive lesser spotted E42 'Guide Air Arrse'. Once seen, never forgotten...

Thanks Alan, very helpful as usual. They are just a lovely design. I will carry on drooling with a little more info....

I heard from Steve at Precision Plating yesterday. They will be plating my parts in about a week. I am excited to get them back soon and hope they look amazing.

In my neck of the woods throwout and release means the same thing. And the special washing machine is called a chemical vat at our machine shops. But your's could have been some kind of ultrasonic thing like for transmission parts? How you like me now? Party on Wayne!

While drooling at S20 engine pictures during those quiet time "having a look on the web", I notice the S20 air boxes on the Z432 and KGC10 (?) are different. The Z432 (PS30) has the air filter housing in front of the radiator, a longer pipe connecting to the car box (two rubber joiners), and the air enters the carb box at the front. (Z432 image from Kat's thread, page 26) The Skyline fitted with the S20, has the air filter housing behind the radiator and connect directly to the carb box, no pipe connector (1 rubber joiner). The air enters the carb box by a pipe coming in on the side. I presume the obvious difference is red for Z432 and Skyline is blue? I ask as I have an image of a red carb box, but the air pipe into this comes in from the side... was there a change during production of the Z432? The way the air filter housing fits to the engine bay differs, my question is does the fixing point exist on other models (s30, Z-L for example), as some models have places to attach something that was not specifc to that model? On the red airbox pictured not on the car, there is an indent at the back of the carb airbox, I take it this is space for the clutch master? Any other documentation of differences (or correcting me-learning here) would I think make a great thread...

Hi Ian , I am glad that you are interested in Z432 , how is your Silvia doing ? I saw a complete restored Silvia at Tokyo auto salon, that was so nice , I was thinking about you. Alan , your Webber set up is so good ! I have heard at that time Nissan couldn’t afford to install Webber , while Mikuni provided a cheaper carburetor , so they took it. Toyota used it too , maybe the same reason? Anyway thanks Mikuni ! Z432 air box set up is superior to the GTR in terms of fresh air , thanks to the long nose , there is a room to position the air cleaner outside of the engine room. GTR air box is always on sale at Japanese auction , but I have never seen Z432 air box on sale almost 10 years. Z432 were sold 400 and some more , while GTR(S20 engined) were sold 2000 and more , this is the reason why Z432 S20 parts are much difficult to obtain. Kats

Hey, congratulations, Kats!

Hi , this is an old thread but I really like it, today I would like to add one solid metal “Fairlady Z “ quarter emblem for left wing . It was suddenly appeared on Yahoo Japan Auction last week , I am so glad that I won . Finally I have got a set of solid metal quarter emblem for my Z432 ( 01/1970) , this set surely deserves for my Z432 . Interesting thing is , all of my solid metal emblems came to me from each different cars . A set of quarter solid metal emblems for Datsun 240Z , and that set of for Fairlady Z , there might be 4 early cars which provided them for me . When I have got the first one , it was more than 10 years ago and now , my collections are complete. Like Chris said , I am thinking the same for the early 240Z would have the chrome Z metal emblem up to some 1000 to 2000 cars . ( solid one would be first 500 or less or more ?? ) This time I will see the good example, as I have bought HLS30-02146 which has white Z metal (of course hollowed) emblems . If this is true for the car , we will be getting much closer to the fact . Kats

Yeah, since most of us here (including the OP) aren't running Wilwood stuff, then that datasheet is pretty much moot About the only thing that Wilwood data sheet did for me was confirm that "residual pressure valves" are really a thing, and (for me) raised the question of "Is Wilwood the only people who do this, or does everybody do it?" And after some digging "on the internet", the answer appears to be "everybody does it and have been doing it for decades." So my bottom line takeaways from all this are pretty much identical to yours... Some sort of residual pressure valve is a good idea if you are running drum brakes with return springs*. And if you are running disk brakes and have your master cylinder mounted lower than the calipers, you should also use one, but it should be a lower pressure rating. There could easily (probably?) be a difference between F and R outlets on the stock master cylinders and there could be issues if you don't account for that in some way. I think we're all on the same page! * I can get into my take about the "why" if anyone is interested, but not sure anyone wants to hear it at this point.

If it works like other auctions I've seen my understanding is that RW1968 placed a bid of $100,000 (or something close since I do not know the bid increments for this site) at some point before 01/20/2022 @ 6pm. Then someone came along and placed a bid of $65,000 on 01/20/2022 @ 6pm and was immediately outbid by RW1968 since his bid was higher, this happened again and again until RolenMiller came along and placed a bid on 01/23/2022 @ 9:33am that was finally more than RW1968's maximum bid thus now being the high bidder.

No no... it was just like a giant (flat) dishwasher, one with a basket i it and a spaying and turning water and sope spraybar thingy... hahaha ... Party on! Cliff!! 😂

p.s. And, just because others, apparently, use a residual pressure valve on mixed drum and disc systems it doens't mean that Nissan did. Despite the extensive descriptions that Nissan put in to the brake chapters, the only mention of a difference at the MC between front and back is about the reservoir. The closest thing to an RPV is the check valve that they show. But there is one on each side and they look the same.

Did you read the wilwood data sheet above? Page 2 is pretty clear. My other z i removed the m/c and turned it around 180 degrees, then I connected the lines and slowly turned it back around and plugged it back into the booster. Tonight I did the new z a different way. I loosened the m/c and removed both lines and reversed them. I had to spend some time on it getting them bent correctly and it’s a much better fit. Another thing, before I disconnected my front brakes from the m/c, I jacked it up and I spun the tire, the brakes were rubbing. When I disconnected the m/c to the front brakes the brakes quit rubbing. Tomorrow I’ll bleed the brakes and see if the front brakes are still rubbing. Another thing with the left rear drum, I pressurized the system to 15 psi, and turned the bleeder and I got fluid out of it. I’m a little confused about this, but I’ll dig back into it when I get my brakes bled. Sent from my iPad using Tapatalk

I took a quick look on the web and came up with this. Seemed to be the best detail of the situation(s): https://www.jalopyjournal.com/forum/threads/tech-brakes-residual-pressure-valves.74978/ After reading through that, I'm not buying the "return springs" part of the theory, and I'm all in that the residual pressure is required only to prevent sucking air into the system at the wheel cylinders. But of course, I'm just a guy who read it on the internet. I've got a master cylinder here that I've taken completely apart, including the outlet valves. If I can find it, I'll see if I can determine any differences between the valves from F vs R. Of course, when I took them out, I didn't bother to mark which is which, so...

The S20 airboxes have carburettor trumpets/funnels integral with the cover:

Here's my factory replacement airbox on period Weber 45DCOE-9s and S20 inlet manifold, for shape reference:

Hi Ian, On the colour question, both the Skyline GT-R (PGC10 & KPGC10) and Fairlady Z432 (PS30) airbox and connecting tube were RED from the factory, with the 432's airfilter housing being BLACK (because it was mounted ahead of the radiator support) whilst the GT-R's were RED (because they were in the engine bay). Factory replacement spare parts came in (manufacturer) Tsuchiya's factory blue colour, as per your photo. The mounting holes for the 432's airfilter box are present on the radiator supports of all contemporary L-series engined S30-series Z models (both Domestic and Export), as are - of course - the holes for the duct and the (diverted) cabin fresh air inlet. The captive nuts for the mounting of the factory option S20 olil cooler are there too. The 432's airbox fits on the car without any special accommodation/clearancing for the clutch master cylinder.

Comparison back of the solid emblem family. Kats