rtlkyuubi
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Sept 7, 2010 22:09:56 GMT
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Sept 7, 2010 23:02:58 GMT
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Ron136 is in Newcastle and loves playing with his lathe. Newcastle is kind of close to Sheffield, right?  |
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93fxdl
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Posts: 2,000
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Sept 8, 2010 10:49:59 GMT
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since i don't know how your current pulley is mounted this may not be of any use but
a way of dialling in mini cams used to be using offset keys back in the days before vernier pulleys
ttfn glenn
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rtlkyuubi
Posted a lot
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Sept 8, 2010 12:48:54 GMT
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thanks for the reply and i wish i could do that, elongate the dowel hole, but mr nissan decided to use 3 little bolts to hold it on instead
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Sept 8, 2010 17:09:48 GMT
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could you elongate the bolt holes?
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Full of automotive and culinary delights visit:  1994 Subaru Legacy Estate Turbo 1985 Vauxhall Nova SR 1995 Fiat Cinquecento Sporting |
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93fxdl
Posted a lot
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Posts: 2,000
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Sept 8, 2010 17:36:55 GMT
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before doing anything check the standard cam timing as it may be ok but if not you will then be able to see which way the pulley has to be rotated inrelation to the camshaft, once you know which direction to relieve the holes, either set them up on a millling machine and cut the slots or set to with a round file, once done reasemble and drill a hole through the pulley into the cam and fit a locating dowel
ttfn glenn
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ezzysi
Posted a lot
Posts: 1,189
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Sept 8, 2010 21:07:35 GMT
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Sorry to hijack the thread but,  Anyone got anymore info on this?? |
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1991 Mk2 Golf Gti 8v
2005 Passat tdi (daily)
1971 Mk1 Escort
2004 Touran (her's)
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Theres gotta be loads of machine shops in sheff!! Slotting the holes sounds like it should work, or get the an aftermarket one like a piper cams one that's the right size, and get the centre of your stock one machined too fit. Also try giving piper a ring, they might make you one  |
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Remember the days when sex was safe and motorsport was dangerous. Vintage bling always attracts pussy.  |
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rtlkyuubi
Posted a lot
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Posts: 2,922
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Sept 9, 2010 20:03:36 GMT
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thanks for the replies ;D but, with machine shops and piper cams, they want lots of cashola to do anything, something which is very rare for me atm  The closest piper cams do off the shelf is pulsar timing gear at £185!!! I could try elongating the holes, but I doubt I would be able to keep it straight and the gear running true. Though tomorrow I'm gonna head to some places and see how much they want. also, will be down in bristol for 2 weeks at the start of october, so if there is anyone down there that can lend a hand, I would be very happy  |
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Last Edit: Sept 9, 2010 20:05:23 GMT by rtlkyuubi
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Sept 9, 2010 20:10:39 GMT
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Did you already tried contacting the German company called Dbilas? They do cams for the MA engine.
Or you could draw first with a computer the 3 boltholes with the correct pitch and print it and use it as a drilling template to elongate the holes.
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rtlkyuubi
Posted a lot
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Sept 9, 2010 20:41:09 GMT
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Did you already tried contacting the German company called Dbilas? They do cams for the MA engine. Or you could draw first with a computer the 3 boltholes with the correct pitch and print it and use it as a drilling template to elongate the holes. I might have to do that if all else fails, but just sent that company an email, though they don't list the ma10/2 engine on their website |
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BiAS
Club Retro Rides Member
Insert witty comment here
Posts: 2,231
Club RR Member Number: 147
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Metal spinny toolsBiAS
@cheeqi
Club Retro Rides Member 147
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Sept 9, 2010 20:55:49 GMT
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Maybe worth pming Grunty or B8D? I believe they may have the access to the spinny metal stuff that you require |
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(car+wheels)-rideheight=WIN
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rtlkyuubi
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Sept 10, 2010 6:36:56 GMT
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Ill give them a message now Cheers Ian ;D |
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MrSpeedy
East Midlands
www.vintagediesels.co.uk
Posts: 4,786 
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Sept 10, 2010 10:10:12 GMT
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If you're anywhere near northants i could slot the holes on my bridgeport. Shouldn't take more than about an hour
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Sept 10, 2010 17:18:01 GMT
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rtlkyuubi
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Sept 10, 2010 18:19:47 GMT
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Might take you up on that speedy as I have family in corby that I need to see so rather local! I tried them ettorebigatti, I sent them an email and they replied saying they don't do em  |
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rtlkyuubi
Posted a lot
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Posts: 2,922
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Sept 10, 2010 20:58:05 GMT
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Thanks for the offers everyone but Ive been talking to the lad who I bought the camshaft off and hes told me that is a special grind of some sort and doesnt need the timing adjusting, sweet!! less to go wrong haha!
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BiAS
Club Retro Rides Member
Insert witty comment here
Posts: 2,231
Club RR Member Number: 147
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Metal spinny toolsBiAS
@cheeqi
Club Retro Rides Member 147
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Sept 10, 2010 21:05:01 GMT
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Thanks for the offers everyone but Ive been talking to the lad who I bought the camshaft off and hes told me that is a special grind of some sort and doesnt need the timing adjusting, sweet!! less to go wrong haha! Was the grind for the head you're using? On OHC the cam timing is relative to the thickness of the head, height of the block and thickness of the head gasket. That's why high compression CG engines are few and far between as the head skim to get the high compression alters the cam timing. |
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(car+wheels)-rideheight=WIN
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rtlkyuubi
Posted a lot
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Sept 10, 2010 21:15:24 GMT
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I had no idea about that happening o: Thanks for the info I'm gonna guess that it is as it came with the modified cylinder head and it had been running on an engine before I got hold of it. But just incase, and so I can check it. When you come to time an engine up with a modified head and custom camshaft, do you still time it up like a normal engine, just that the cam timing mark probably wouldnt line up? Or do you set it a little before or after tdc? |
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Sept 11, 2010 21:27:27 GMT
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old rule of thumb is to get inlet and exhaust valve opening the same at TDC on the overlap between exhaust closing and inlet opening (i.e.non firing stroke) in reality you may have to advance on this slightly (inlet valve opening earlier) as the charges take time to gather momentum and you want the charge moving before the piston changes direction. You need accurate TDC marked on the crank pully, turn the engine over measuring valve lift on the inlet valve stop at TDC record the figure, move the dti to the exhaust valve and measure the lift as it closes, adjust until they are the same or inlet leading (more open) slightly.
if you have the timing figures for the cam you can also work out what crank angle you should be at when getting full lift on the cam. If you don't have the figures then start at equal opening as above
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Last Edit: Sept 11, 2010 21:29:18 GMT by Good Scrap
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But the major proplem is that I don't actually own or am able to get to use a lathe. So this thread is a little plee to anyone who has a lathe. If I could use (local is to sheffield) or if anyone could make me one for beer tokens i would be most gratefull! ;D
The closest piper cams do off the shelf is pulsar timing gear at £185!!!
