robcool
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 posted on 17/4/10 at 08:48 PM |
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Help!!! New camshaft..
Hey people
Just hoping someone can help me.
I bough myself a new camshaft on Ebay of all places for my pinto engine. I believe it’s a Burton BF30 Camshaft, I got the numbers off the camshaft
itself today and they are CAMTEC ZC369.
I fitted the camshaft today and reset the clearances of the tappet at .010mm as I believe that is the correct setting? However on rotating the engine
after setting one or two of the clearance the valve is hitting the piston so can’t rotated to engine fully.
So what am I don’t wrong people?? Am I right with the normal clearance of .010mm.
Rob
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austin man
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| posted on 17/4/10 at 08:51 PM |
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Have you got the timing right ?? you could be out henc piston being higher up the bore when valve opening. A high lift cam has a longer overlap rather
than being higher so the valve is opening longer.
Id put my mone on the timing being out a tooth or two
Life is like a bowl of fruit, funny how all the weird looking ones are left alone
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madteg
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| posted on 17/4/10 at 08:58 PM |
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Are you shaw your valve springs are not boxing, as last time i put a high cam in a pinto i had to machine a recess in head so springs sat lower also
using double valve springs.
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robcool
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| posted on 17/4/10 at 09:09 PM |
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I found this on the Burton website 108 deg and .008/0.010" clearance. I dont know it the timing is correct. The bottom pulley have afew marks
on it i have set it to the first and bigger mark. and i am not shore about tyhe camshaft? there are two nobbley bits on the camshaft which i have put
facing upper most.
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will121
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| posted on 17/4/10 at 09:15 PM |
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quote:
Originally posted by robcool
I found this on the Burton website 108 deg and .008/0.010" clearance. I dont know it the timing is correct. The bottom pulley have afew marks
on it i have set it to the first and bigger mark. and i am not shore about tyhe camshaft? there are two nobbley bits on the camshaft which i have put
facing upper most.
have you got details of how to set standard cam timing? i would start here first, to set at 108degrees will requite a timing disc and a DTI to find
centre of cam duration. i would set at standard and see how it goes, is the cam shaft you got have wild amount of lift compared to standard?
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flak monkey
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| posted on 17/4/10 at 09:15 PM |
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If its a BF30 you need to do the following.
Turn the cam to 108deg after TDC, so set to TDC then turn clockwise looking at the pulley by 108deg. For this you will need a timing disc.
Then set inlet valve #1 to full lift by using an indicator on the valve spring cap.
Then fit the belt as normal.
Your cam will then be timed in.
Normal valve clearances are inlet 0.2mm and exhaust 0.25mm same for the BF30.
David
Sera
http://www.motosera.com
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robocog
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| posted on 17/4/10 at 10:26 PM |
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http://www.locostbuilders.co.uk/viewthread.php?tid=67284
I also think mine had one of those cams in when it was Pinto powered
(I did try and find my posting where I asked if anyone had heard of them but I must have deleted it)
I set mine to std timing and clearances according to the Haynes and made more accurate by using a method I found from a Dave Walker article that was
linked on here somewhere
Summary of which was, don't believe the markings on the cam pulley nor the crank pulley
Block the piston so it wont go past TDC (think extra long spark plug type doo dah)
print a timing wheel and stick to crank pulley, make a pointer
rock engine both ways and mark the pulley at both these points, exactly halfway is exactly TDC, set the timing wheel to TDC on your pointer
(I think I used a dial gauge to get this as accurate as I could as I didn't have an extra long spark plug)
It then involved a dial gauge on the valves to set the cam pulley up correctly (maybe minus the woodruff key if required...makng sure to locktite and
torque stuff up properly after a final check
If I find the article I will repost it as it was pretty handy
I did use a vernier to get mine 100%...which was pretty bling, but I never got to play with swinging the timing to see if I could detect any
differences
(I managed to loose/gain 10hp at peak by using switched ignition timing via megajolt which I failed to detect any differences between the two maps via
my bum, but have a dyno printout to prove it did exhist)
Regards
Rob
[Edited on 17/4/10 by robocog]
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robocog
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| posted on 17/4/10 at 10:42 PM |
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cam timing 1
 
cam timing 2
 
cam timing 3
Regards
Rob
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robcool
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| posted on 20/4/10 at 07:59 PM |
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i think i am going to just put the standard one on and when i do decide to get it converted to unleaded i will fit the camshaft then. good weather is
here and i want to get out in it now.
cheers
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