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Everything posted by JohnCh
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We had two threads on this topic, so merged them under the initial post to avoid confusion and a split conversation. -John
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Pegasus also has some that work well for silicone hoses: https://www.pegasusautoracing.com//productselection.asp?Product=3613 I've also had good experiences with the Summit style that @toldfield shared above. -John
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My Westfield has the hard lines running through the transmission tunnel. Much older car, but it is odd they moved them to that position. I wonder if that is a result of the Miata transmission which is wider than the Type-9? -John
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1980 Caterham Seven Twin-Cam wiring diagram
JohnCh replied to Larry Sanata's topic in General Sevens Discussion
Thanks for sharing it. I've added it to the downloads section to ease future discoverability. -John -
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1980 Caterham Seven Twin-Cam wiring diagram
JohnCh replied to Larry Sanata's topic in General Sevens Discussion
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1980 Caterham Seven Twin-Cam wiring diagram
JohnCh replied to Larry Sanata's topic in General Sevens Discussion
@MoBoost I just checked and the file is really small (17kb). Do you want to send it to me via PM and see if I can figure out the issue? Thanks, John -
1980 Caterham Seven Twin-Cam wiring diagram
JohnCh replied to Larry Sanata's topic in General Sevens Discussion
If no one has that specific wiring diagram, this one might be close: -John -
By unsupported, I mean that it will not embed the photo in the post as it will with jpeg, jpg, gif, etc. It’s just a downloadable file. If your OS or the apps loaded on your device support that file type, then yes, you can open it.
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Yep, those work. Now hopefully someone can actually help you with your question -John
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Hi James, you attached an .HEIC file which is an unsupported file type (most backend systems used by various brands of forum software don't yet support it.) My guess is you took the photo with your iPhone, then uploaded it to the forum from a Mac device. If so, it stays in that format. Try emailing the photos to yourself, which generally does the conversion to jpeg, or take a screenshot of the photo and save it as a jpeg, then attach it. -John
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The next delay was down to forgetfulness. I had planned to order a new degree wheel for this project; something I failed to do. The Kent Cams wheel I've used in the past is small (<6-3/4") which means the difference of 1/2 degree on the wheel is really tiny and requires a lot of care to ensure timing is just right. A larger wheel has greater spacing between the degree marks and is therefore a little less frustrating to get correct. As long as I was waiting for the new wheel to arrive, I thought I'd mock up and 3D print a better degree wheel pointer option than using an old piece of solid strand wire wrapped around a bolt. The plan is to use the factory TDC bolt to put #1 at TDC, center the degree wheel so the pointer is on 0, then remove the bolt and confirm TDC with the dial indicator. If it's off by a small amount, simply loosen the thumbscrew and slide the pointer to the correct position on the wheel. It seems this will be less frustrating and more precise than re-bending the wire or repositioning the wheel. I hope to finish the engine work this weekend. -John
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I've had a few self-inflicted delays to finishing up the engine. First was indecision over a mechanical timing chain tensioner vs. the factory hydraulic version, then was a realization that I forgot to order a replacement degree wheel. I'll go into some detail on the timing chain tensioner in this post since it might be of interest to anyone contemplating building a Duratec. Most of the UK Duratec tuners recommend a mechanical version of the tensioner as the plastic teeth on the hydraulic version's ratcheting mechanism can supposedly break when the throttle is abruptly lifted at high rpm. The mechanical versions swap out the ratcheting mechanism for a bolt and lock nut setup as illustrated in the images shamelessly stolen from the internet. On the left is the stock hydraulic tensioner with the ratcheting mechanism extended. On the right is a mechanical tensioner that replaces the ratcheting component with a bolt. My 2.0L uses a mechanical tensioner I purchased from Raceco many years ago. I had one on order from Raceline for this engine, but after 7 months of waiting for production, I decided it was time for a rethink. Speaking with Esslinger, they felt the factory unit is fine provided it's the older style cast iron version rather than the new aluminum item Ford currently supplies. Given they have extensive experience building and refreshing race Duratecs, I decided to follow their recommendation and a cast iron item was ordered (Melling still manufactures this as part #BT5514.) I then made the mistake of cruising Caterham's parts site one evening. It seems they also used a mechanical tensioner for the R500 (the one pictured above) and had some in stock. Hmm… Deciding to err on the side of caution, I placed the order and triggered my first delay After the new tensioner arrived from Caterham sans instructions, I dug up the old email from Raceco that explained how to set the tension. It contained a line that didn't apply to my 2.0L installation so never stuck in my memory: "I prefer to use a good used chain. If you use a new one it will initially wear quite quickly and the chain will need to be re-tensioned which involves a timing cover removal. " I have no desire to go through the hassle of pulling and resealing the front cover shortly after getting the car on the road, so I've decided to stick with the hydraulic version for now, then swap to the mechanical tensioner the next time I pull the engine. In the meantime, I'll see if I can take some chain deflection measurements to monitor over time as an indicator of broken teeth. -John
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New member, preparing to take the plunge, VW engine?
JohnCh replied to GTIspirit's topic in General Sevens Discussion
I suspect fitting the engine under the bonnet with the stock intake will be tough. I have a 2.5L Duratec on an engine stand right now and could provide a measurement for comparison. Those engines "just" fit. Are you considering new or used? If used, you could be looking at either a Zetec or Duratec, if new, then Duratec is now the standard configuration. How much of the desire to keep the VW engine is driven by emotional attachment vs. the fact you like the characteristics of that engine? When it's emotional attachment, logic tends to go out the window, which is understandable and often all that's needed to justify a decision. However, if it's the nature of the engine, I wouldn't sell a modified Zetec or Duratec short. Given the money and headaches you would save doing the conversion, you could upgrade the Zetec/Duratec and have something with a lot more power that you may like nearly as much. -John -
And now for something completely different... -John
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Here's a picture of my current setup. For scale, the wheel is 270mm, but it appears my spokes are thinner than yours. -John
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I've been enjoying following this journey and agree with Kitcat that all the new build threads have been great. We need more! -John
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Have you considered mounting the turn signal switches in the spokes? It looks like you might have space for that. Mine are mounted this way and it works well. I can post a picture if it helps. -John
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It looks like there is a sporadic issue with .MOV files. After recreating this issue in 4 out of 5 attempts in our test environment, I've piled onto an existing thread in the Invision support forum in hopes of getting this sorted. -John
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Are you trying to get away from the overstuffed look? The later S-type seats are visually flatter but still have small side supports. I'm not sure what Birkin is using these days, but that could be another option. Intatrim, whom I believe may have made seats for Birkin in the past, does a range of seats that are fairly narrow and might be worth a look. As for regular production cars, that might be tough given the width restriction. -John
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I believe that TPS is from Ford Duratec installations from the early 2000's. If that's the case, it should be easy to source in the US based on the part number. I don't have any experience with that specific TPS, but the Colvern units frequently used on Jenvey's do fail and exhibit similar, random behavior when that occurs. Rule out the easy fixes first. -John
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Thanks for that offer! If I run into a bind, I will let you know. Most things I do should be pretty simple. I'm hoping something like emachineshop.com will suffice, but there are a number of machine shops in my area with good reputations if they don't work out. Cheers John
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Thanks, and you're correct, I'm using an FDM printer, so that won't apply. My current plan is to use the printer for rapid prototyping, then have any parts machined based on the CAD files. Thanks, John