Ian Kinder (Bagpuss) - Joint Peak District AO Posted January 12 Share Posted January 12 12 hours ago, Davemk1 said: Thanks for the reply. Are you running the Denso alternator on an S2000? My concern was that if you needed to gear it down to keep from spinning it too quickly that it might not charge well since it would be spinning so slowly most of the time. Have you had any issues? Interesting idea on the Ford gear box. The Type9 box is not at all common in the USA and they seem to be hard to come by. I love the gearing of the S2000 box. With the rear diff and tire size I have the perfect 63 mph at 9000 rpms in 2nd gear. dave Hi @Davemk1 I built my S2000 with a small denso type Alternator in 2016 and I've covered circa 32,000 miles since then. It's not been plain sailing, but I'd still recommend you doing the same. Details in my build thread here- Bagpuss build thread If I was to do it again, I'd do the same again. As a fellow S2000 user, regular visits to the 9000rpm redline are made by me. I chose the alternator pulley size to ensure the alternator doesn't seen north of 18000 rpm. Charging at the 1100 rpm idle isn't a problem. My first alternator was a e-bay special and didn't last too long (the charge warning light started to flicker above 5000 rpm) I replaced this with Denso branded item from GBS Cars and that's been fine ever since. I did have a concern last spring with a noise sometimes, so I took it off and took it to an alternator specialist and they confirmed the bearings to be fine and tested it electrical as fine too (free of charge as well). I then used a laser light to align the pulley correcly with the 4 groove belt to the crank pulley and it's been quiet every since. From my build thread, you'll see there has been some 'evolution' of brakets and tests of different types of tensioners. My current large alloy bottom bracket and upper steel bracket have been fine. Though I did have the bottom alternator hole bushed so it didn't rock on the bolt. The two bolt fixing syem isn't ideal. I'd prefer 3. Given you do much lower mileage than me, I'm sure you'll be fine. Drop me a PM if you wish to have a call and talk any of this through. Best regards, Ian 3 Quote Link to comment Share on other sites More sharing options...
David Oxfordshire Posted January 12 Share Posted January 12 Bit embarrassing this one. Whilst waiting for the new Westfield to come out and weighing up options I've bought an MK Indy that needed some TLC. Interesting comparing it to a Westfield.....🙂 3 Quote Link to comment Share on other sites More sharing options...
Euan Hoosearmy Posted January 12 Share Posted January 12 Photos and detailed findings please! 1 Quote Link to comment Share on other sites More sharing options...
David Oxfordshire Posted January 12 Share Posted January 12 30 minutes ago, Euan Hoosearmy said: Photos and detailed findings please! If there is enough interest i can put something in build diaries maybe? 6 Quote Link to comment Share on other sites More sharing options...
Flying Carrot Steve Posted January 12 Share Posted January 12 7 hours ago, Rob Hunter - Club Secretary said: Gearbox wise I would be thinking about the MX5/Miata gearbox rather than a Type 9 as they're more plentiful. A number of companies (like MK Sportscars) are doing adapter plates for the K20 so I'm sure an F20 adapter would be possible. What battery are you running? I've been running the Jack Webb Motorsport LifePo4 lithium that weighs about 1.6kg. How has the Jack Webb battery performed? That's my next purchase. Did you go for the PS-12? Quote Link to comment Share on other sites More sharing options...
Flying Carrot Steve Posted January 12 Share Posted January 12 1 hour ago, Euan Hoosearmy said: Photos and detailed findings please! I second that! 1 Quote Link to comment Share on other sites More sharing options...
Ian Kinder (Bagpuss) - Joint Peak District AO Posted January 12 Share Posted January 12 42 minutes ago, David Oxfordshire said: If there is enough interest i can put something in build diaries maybe? Go for. The club is inclusive of all seven type sports cars. 4 Quote Link to comment Share on other sites More sharing options...
Rob Hunter - Club Secretary Posted January 12 Share Posted January 12 3 hours ago, Flying Carrot Steve said: How has the Jack Webb battery performed? That's my next purchase. Did you go for the PS-12? To be honest, I researched it loads after the lithium battery horror stories (I have RC cars with Li-Po's that are like hand grenades 😂) but the new ferrous phosphate ones are much more stable. I've had the PS12 version on the car since Feb 2021 and it hasn't missed a beat. I've had a dead battery twice in that time (down to me leaving ignition on or something plugged into the 12v socket). Amazingly, 10-15mins with the JWM charger and the car bursts into life. I've got no bad things to say, its been 100% reliable and the 6kg saving over the Banner 53034 means I can have more cakes, bonus! 😂 1 1 3 Quote Link to comment Share on other sites More sharing options...
Flying Carrot Steve Posted January 13 Share Posted January 13 17 hours ago, Rob Hunter - Club Secretary said: To be honest, I researched it loads after the lithium battery horror stories (I have RC cars with Li-Po's that are like hand grenades 😂) but the new ferrous phosphate ones are much more stable. I've had the PS12 version on the car since Feb 2021 and it hasn't missed a beat. I've had a dead battery twice in that time (down to me leaving ignition on or something plugged into the 12v socket). Amazingly, 10-15mins with the JWM charger and the car bursts into life. I've got no bad things to say, its been 100% reliable and the 6kg saving over the Banner 53034 means I can have more cakes, bonus! 😂 Thanks Rob. I have to say that not all lithium batteries seem to be created equal and the Jack Webb ones do seem to have an excellent reputation. This comes from the JW website..... 'Safe: Unlike other lithium batteries, JWM batteries are internally inert, do no run warm and do not leak as they contain no liquids. You can even install them upside down! JWM batteries are equipped with internal electronic management to protect against overcharging, over-discharging and short circuit - as required to become a MSUK Registered supplier. JWM batteries are supplied with a 1 year return to base warranty (excludes Misuse)' I haven't heard of any issues with fire etc. 1 Quote Link to comment Share on other sites More sharing options...
Rob Hunter - Club Secretary Posted January 13 Share Posted January 13 1 hour ago, Flying Carrot Steve said: Thanks Rob. I have to say that not all lithium batteries seem to be created equal and the Jack Webb ones do seem to have an excellent reputation. This comes from the JW website..... 'Safe: Unlike other lithium batteries, JWM batteries are internally inert, do no run warm and do not leak as they contain no liquids. You can even install them upside down! JWM batteries are equipped with internal electronic management to protect against overcharging, over-discharging and short circuit - as required to become a MSUK Registered supplier. JWM batteries are supplied with a 1 year return to base warranty (excludes Misuse)' I haven't heard of any issues with fire etc. I've not heard anything bad either, they weren't that well known when I fitted mine but know battery technology reasonably well with 35 years of running RC cars, planes, helicopters etc. Mine has been on for 3 years and 10,000 miles of fast road and track with no problems. The old 53034 would need charging regularly as did the varley red top I had in my previous car 1 Quote Link to comment Share on other sites More sharing options...
Davemk1 Posted January 13 Share Posted January 13 On 11/01/2024 at 09:40, LoneWolf said: I've got a small Denso alternator which weight around 2kg. You can adjust the rpm by changing the alternator pulley. The S2000 gearbox is actually quite heavy and not specifically geared for a light car. I've seen some custom bellhousings to mate the F20C to the Type9, which is quite light in comparison (my full aluminium SPC Type9 is surprisingly light, probably less than 30kg, I can grab it quite easily alone, while it was pretty heavy with the iron case). I don't see other areas where you can lose a substantial amount of weight. Carbon stuff is, as you say, mostly cosmetic for the money you pay for it. Hello Mr. Lone - I'm curious as to what pulley you have fit to your Denso alternator? I ask because it looks like the stock Honda alternator has a 17 mm shaft where the Denso has a 15 mm shaft so I'd need to buy a new pulley. Can you please tell me what pulley you are using? Thanks so much! dave Quote Link to comment Share on other sites More sharing options...
Dave Eastwood (Gadgetman) - Club Chairman Posted January 13 Share Posted January 13 Lone Wolf isn't using a Honda, I'm afraid 1 Quote Link to comment Share on other sites More sharing options...
Ian Kinder (Bagpuss) - Joint Peak District AO Posted January 13 Share Posted January 13 1 hour ago, Davemk1 said: Hello Mr. Lone - I'm curious as to what pulley you have fit to your Denso alternator? I ask because it looks like the stock Honda alternator has a 17 mm shaft where the Denso has a 15 mm shaft so I'd need to buy a new pulley. Can you please tell me what pulley you are using? Thanks so much! dave Here's the 80mm pulley I used (Honda Crank pulley is 160mm Diameter, so this gears it perfectly to 18,000 rpm at the alternator at the engine redline of 9000rpm- Brise pulley It comes with a bush so it fits on 15 or 17mm shafts. 3 Quote Link to comment Share on other sites More sharing options...
Davemk1 Posted January 13 Share Posted January 13 2 hours ago, Ian Kinder (Bagpuss) - Joint Peak District AO said: Here's the 80mm pulley I used (Honda Crank pulley is 160mm Diameter, so this gears it perfectly to 18,000 rpm at the alternator at the engine redline of 9000rpm- Brise pulley It comes with a bush so it fits on 15 or 17mm shafts. Thanks so much - that's the one I was looking at. dave Quote Link to comment Share on other sites More sharing options...
Flying Carrot Steve Posted January 18 Share Posted January 18 Something I wish I hadn't done 😤 They look rough but actually they are mint when cleaned, double ceramic coated etc 2 Quote Link to comment Share on other sites More sharing options...
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