Looks like it has had an interesting life.....One's popped up in Richmond BC. No. 00152.
Looks like it has had an interesting life.....One's popped up in Richmond BC. No. 00152.
I think 152 was not on our current list so thanks for info ! any more you know of would be appreciated . I think we are up to around 50 to 55 cars at this point .. appox 5 possibly in Europe. It has been rumored that appox 60 cars where still on shop floor unfinished when doors where closed !Did you know about 00152? I often wonder how many unknown ones are left.
I have this delicious memory that Renault outsmarted Colin Chapman there by selling him a batch of up-rated R16 engines not long before the TS engine was released. Given CC wasn't slothful in business....... Maybe there was an issue fitting in the crossflow system? Not sure.thanks for the info Frans interesting to hear makes one wonder if there where a few other small start up companies that Renault may have stopped the supply lines on ?? Did they not also limit the performance pieces to the lotus guy's back in the day ?
Manic GT
Probably could but being a experiment I was just using up old inventory . I since found some 1565 flat tops but for now I will try this . I have set it up so the pistons can be easily exchanged and upgraded to take the 1255 head That I still have in spare inventory .I like the interesting mods. Floating wrist pins are a better idea than the interference fit. Getting them in and out is always frought with the chance of damage to a piston. Can't you get 1596 cc R12 G pistons any more? They would have given 10.25 : 1 compression without need for head shaving. Like the photos. Thanks for the update.
Very clever Frans! Hope you haven't just been shaken about too much!Manicgt,
How did you cut the circlip grooves into the piston? When I got my new pistons, there wasn't a groove for them either and I tried to figure a way without a 4-jaw chuck but couldn't do it.
I then went and bought a Teflon rod and made these plugs. I have used them in previous race engines and they work well provided you cut a slot or hole in them because if the air inside the piston pins heats up it starts pushing the pins out and it creates another groove on the inside of the barrel. Learnt the hard way!
Frans.
He is still using the R12 Wedge head, so the flat tops will be the best choice. If looking for even more compression the head can be angle milled a couple of mm, rather than cutting it down straight.I like the interesting mods. Floating wrist pins are a better idea than the interference fit. Getting them in and out is always frought with the chance of damage to a piston. Can't you get 1596 cc R12 G pistons any more? They would have given 10.25 : 1 compression without need for head shaving. Like the photos. Thanks for the update.
I wish my old computer had not died it had all the pictures showing how the circlip grooves where cut and a picture is worth a thousand words ! I will try to explain with words ! I turned down a rod that was the wrist pin size than drilled and tapped the one end with a tapered pipe tap . Than I cut 2 slots across the tapped portion so that when you thread in the tapered plug it would expand the end . It is basically the same as a collect would work ! when inserted into the wrist pin hole it will lock the piston in place . I than spend some time custom grinding a high speed bit for my tool holder that had a hook on the end the proper width for the circlip . Frans I would have followed your lead with using teeth from a saw blade welded onto the end of a rod for the tool cutter but since this was a test case did not go that far with the effort . The piston cut easily after all it is just aluminum based ? I can take a picture of wrist pin home made holder if you like ?Manicgt,
How did you cut the circlip grooves into the piston? When I got my new pistons, there wasn't a groove for them either and I tried to figure a way without a 4-jaw chuck but couldn't do it.
I then went and bought a Teflon rod and made these plugs. I have used them in previous race engines and they work well provided you cut a slot or hole in them because if the air inside the piston pins heats up it starts pushing the pins out and it creates another groove on the inside of the barrel. Learnt the hard way!
Frans.
With a answer like that you got me curious as to whether your piston clamping is patented or how different it would be compared to how I would approach machining a piston if needed ?No need Manic, I understand and it is actually very simple once you've seen or heard about it. Funny, isn't it always like that? I have my own secret way (don't know how secret it is) of clamping a piston to machine the tops off. That is in a small average lathe like mine without even touching sides to do damage with the jaws.
Frans.