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Posted: Mon Jun 09, 14 11:47 am
by Carl
Steve wrote:Gotcha....just trying to learn from your thread Carl as its really interesting....
so the discussion at the moment is whether you should be able to run a 0.004" gauge round or a 0.002" gauge??
You got it, unless I haven't
Posted: Mon Jun 09, 14 11:49 am
by Dave-R
Told you just to hone it and slap it all together again.
Posted: Mon Jun 09, 14 11:51 am
by Steve
Thanks men....
Posted: Mon Jun 09, 14 12:46 pm
by Dave999
the radius of the bore should be 4 thou bigger than the radius of the piston
that means the bore diameter is 8 thou bigger than that of the piston.
the radius being 1/2 the diameter
Dave
Posted: Mon Jun 09, 14 1:35 pm
by Les Szabo
Carl, gap your rings properly, carefully put it all together checking all the clearances including VTP and you will be fine and running sweet
Les
Posted: Mon Jun 09, 14 3:27 pm
by Mick70RR
Did a bit of searching because I started to doubt myself.
Everything I read says you have 0.008" clearance.
This book explains how to measure piston to cylinder wall clearance.
http://books.google.co.uk/books?id=Ff4P ... edir_esc=y
Posted: Mon Jun 09, 14 4:13 pm
by Carl
Les Szabo wrote:Carl, gap your rings properly, carefully put it all together
checking all the clearances including VTP and you will be fine and running sweet
Les
Yep I would be daft not to now ive come this far, need to get hold of a couple of old solid lifters for that then
Posted: Mon Jun 09, 14 6:34 pm
by Mossy68
not again !!!!!
This should be re titled the " piston to wall " thread !!!
As I understand it.
Carl took the block , pistons and rings to a reputable engine machine shop along with the pare work for the Ross pistons showing required dimensions etc.
the bores were honed to the correct dimensions ( according to Ross ) which resulted in 95% of the scoring being removed.
Rebuild time !!!
Correct Carl ???
Posted: Mon Jun 09, 14 10:15 pm
by Carl
Correct Gary
And we have 4 thou either side of Piston so in theory we are good to go.
Posted: Mon Jun 09, 14 10:21 pm
by Mossy68
Carl wrote:Correct Gary
And we have 4 thou either side of Piston so in theory we are good to go.
Thank Bananarama! for that !!!!!
By the way. A circle only has 1 side. Therefore a PTW of 4 thou !!
Posted: Mon Jun 09, 14 10:23 pm
by Carl
No its a square with the edges rounded off
Posted: Mon Jun 09, 14 10:26 pm
by Mossy68
Posted: Mon Jun 09, 14 10:28 pm
by Mick70RR
I'm sure you'll be fine Carl.
By the way how do you measure your bearing clearances?
Posted: Mon Jun 09, 14 10:32 pm
by Mossy68
Mick70RR wrote:I'm sure you'll be fine Carl.
By the way how do you measure your bearing clearances?
No Mick. Please !!!!
Posted: Mon Jun 09, 14 10:40 pm
by Mick70RR
Ok, I give in.