HS30-H

I would recommend to anybody who has questions that they contact S30.world and ask them there.

I drove one of the S30.world 'test' cars fitted with their NISMO reinforced 6-speed just a few weeks ago whilst assisting Nostalgic Hero magazine staff who are doing a feature on their operations. The six-speed (paired with a 3.9:1 ratio R180) worked really nicely behind a well behaved street-tuned L24 (still on Hitachis) and was a pleasure to use. Don't know what else to say about it. It makes a lot of sense cost-wise as an alternative to a full rebuild of an A, B or C-type transmission (especially so for the Servo synchro variants) and the ratio spread seemed just right. We covered urban, 5-lane highway and winding 2-lane road mileage, so a good mix of conditions. That car is now on a road trip where it has been driven from Hungary, back through to France and onward south for some serious test mileage. I can't imagine the transmission conversion giving any cause for concern. The NISMO Reinforced RRS50 6-speed is used in several other conversion kits for the S30 (notably by ESCORT) and I've never heard of any problems with them. There were some production delays at AISIN - who make the transmissions for NISMO - due to flooding after the recent typhoons, but that situation should be improving by now.

Where would the componentry to build up a running, driving and fully functioning car come from in China? There's no legacy of S30-series Z sales there, so no raw material to act as organ and/or identity donors. Same goes for the AE86, Mustang, classic Mini and other bodyshells they have been knocking out. Everything I have seen about Juncheng Vehicle Co. says to me that they are totally focused on exporting their 'replica' classic bodyshells. The domestic Chinese market for such products is all but non-existent.

Just in case you haven't seen it, here's a factory document showing the system as fitted to Japanese (RHD) variants. You can see the hose and grommet that go in your drain hole:

I would imagine it was a matter of cost, weight and complexity (both in hardware and in fit/no fit building and ordering). The struggle in keeping weight down for some markets was something chief engineer Hitoshi Uemura often mentioned in his stories about the creation of the S30-series Z, so it may well have been a key factor. Nevertheless, the aircon-related details were built into every bodyshell, as well as the basic design of both RHD and LHD heater/fan units.

"Thanks Mr K!" /jk

It's the drain hole for the factory air conditioner that was never offered on the Export market cars, only on Japanese domestic variants.

@Derek Maybe this would be a good time for you to mention that there are already two of your Datsunworks KN20 head conversions (soon to be three) built up and running in Japan with this very same GIKEN CC and NISMO 32010-RRS50 reinforced 6-speed transmission conversions attached to them. Like I said, I think Sagami san of GIKEN CC knows what he's doing and it would be a shame if his engineering facilities, capabilities and judgement were to be called into doubt by omission. The NISMO 32010-RRS50 is an off-the-shelf product that's been available for quite a while so there's plenty of hard data and personal user reviews out there (largely in the S13/S14/S15 scene). NISMO Japan has some nice hard data and graphics here: https://www.nismo.co.jp/products/web_catalogue/clutch_mission/reinforced_cross_6-speed_transmission.html Torque 'capacity' is often quoted at 40 kgfm (392 Nm) but I would have thought such values are more than a little subjective. @Zed Head Call me old fashioned if you like, but I'd recommend that anybody with any serious questions (rather than just arcane, onanistic point-scoring nitpicks ) might be well advised to contact the supplier of said parts and ask them there.

Give it a rest, FFS.

Derek, are you aware of GIKEN CC's other work? I think Sagami san knows what he's doing...

Godzilla Raceworks are offering CD009 and Aisin TL70 conversion kits, I believe? Not the same as the NISMO reinforced 32010-RRS50 6-speed. As for GPS signal to cable-driven speedo, Speedhut SPEEDBOX is a good option: https://speedhut.com/speedbox

Clearly stated on the S30.world web page for the transmission, the Japanese designer and manufacturer of the front case and bellhousing conversion is a company called GIKEN Combination Company ('GIKEN CC'). I also mentioned it in my above answer to your question: I rather doubt that - admirable though Derek's work is - either GIKEN CC or S30.world will have got the idea for an L-series conversion kit for the NISMO S15 6-speed from Datsunworks. Nor will other manufacturers of similar products such as ESCORT Japan, who have had their version on the market for at least two and half years already. Conversion cases/bellhousings are hardly a new idea. are they? I believe the owner of GIKEN CC - as a fellow automotive engineer and machinist - is an admirer of Derek's Datsunworks KN20 cylinder head and that's why he is prepared to make a custom front case/bellhousing for a customer to mate the Datsunworks KN20 with the NISMO S15 6-speed in the same (clocked) way that the NISMO twin cam head conversion can be. As for your thinking out loud/stream-of-consciousness style musing on the word 'Takumi', I'm somewhat nonplussed at your direction of travel. Clearly (maybe not...?) the word 'Takumi' is simply being used as a catchy name for a particular themed line within S30.world's product range. No idea why you'd want to dissect it any more than that. Maybe - to stop the universe getting lopsided - there's somebody in Japan wondering why the word 'Craftsman' is written on a wrench...?

I think you've got your wires somewhat crossed again. The S30.world 'Takumi Series' TS-001 version of the NISMO 32010-RRS50 transmission uses a front case and bellhousing to match the L-series engine which is manufactured in Japan by GIKEN Combination Company (GIKEN CC).

It opens OK for me. Maybe your recent browser problems are to blame?

Google 'Phil Stott Motorsport'. They are based in the United Kingdom.