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JB
Mr Quoter-vator
Joined: 16 Feb 2004
Posts: 7405
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| Posted:
Thu Sep 02, 2004 2:13 pm |
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ere look at these.... first pic is the old 1.8 pistons i got from jimbo's block...inlets on the left
the second is a shot of mine in my newer 1.8 block....inlets only showing
dont my newer ones look smaller than the older ones....!!
was lookin at this as im still deciding whether to grind the old but new rebuild block piston cutout for my 32s with cams....but the pocket seems bigger already (albeit bashed!) |
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Neal
Forum Moderator
Joined: 18 Feb 2004
Posts: 7432
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Thu Sep 02, 2004 3:26 pm |
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looks the same to me.
measure along the straight edge of the pocket and youll know wont you! |
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JB
Mr Quoter-vator
Joined: 16 Feb 2004
Posts: 7405
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| Posted:
Thu Sep 02, 2004 11:52 pm |
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how can u say they look the same...the top picture (inlets to the left) are almost touching the edge whereas the bottom ones are a good few mil in...
cant measure as mine no longer look like that lol...ground them out. |
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Neal
Forum Moderator
Joined: 18 Feb 2004
Posts: 7432
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| Posted:
Fri Sep 03, 2004 12:35 am |
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heres mine, look more similar to your newer ones. |
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JB
Mr Quoter-vator
Joined: 16 Feb 2004
Posts: 7405
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| Posted:
Fri Sep 03, 2004 1:11 pm |
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yeah id agree...wouldnt u say the old ones at the top look bigger? the cutouts seem to go right to the edge of the piston |
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Chris H
Forum Moderator
Joined: 02 Mar 2004
Posts: 19978
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Fri Sep 03, 2004 1:44 pm |
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yes the top ones are bigger, so the point being?
Check it with plastercine. |
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JB
Mr Quoter-vator
Joined: 16 Feb 2004
Posts: 7405
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| Posted:
Fri Sep 03, 2004 7:11 pm |
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apparently plastacine test with std cams and valves shows about 3mm clearance...so with kent cams with a lift of about 10.3 and 32mm valves do i need to grind?? esp seeing as the pistons i am about to use have what appears to be bigger cutouts |
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Chris H
Forum Moderator
Joined: 02 Mar 2004
Posts: 19978
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| Posted:
Sat Sep 04, 2004 6:51 am |
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stan
Gay Rights Activist
Joined: 07 Apr 2004
Posts: 1268
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| Posted:
Sat Sep 04, 2004 8:59 am |
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thing is, although u're using more lift, at the point where contact MAY take place, there is hardly going to be much difference in lift. wot (I mean what really) i mean is, say u have 3mm more lift with kent cams, it isnt 3mm untill its at max lift, by which time the piston is over half way down and well clear of any contact. at say TDC, there wont be a big enough increase in lift to cause contact....
they be fine!! |
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JB
Mr Quoter-vator
Joined: 16 Feb 2004
Posts: 7405
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| Posted:
Sat Sep 04, 2004 12:11 pm |
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ok im with ya.....ill leave em be
ta very much |
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