Page:
Home > Help Needed / General Tech Chat > Piston to bore clearance

gnd77

1 Posts
Member #: 1410
Junior Member

26th Oct, 2011 at 09:31:58pm

Hi,

Might seem a silly question, but on the subject of piston to bore clearance, if you are aiming for say .0025" clearance, is that per side (i.e. .005" difference in the diameters) or total, i.e. .0025" difference in the diameters?

When the piston is mic'd up at 90 degrees to the pin is about 10mm up from the skirt base the right place to check (to account for 'barreling')?

Finally, I realise this is a matter of opinion, but what do people think is a reasonable clearance? I am running powermax 73,5 pistons on a n/a 16v.

Thanks in advance for any advice!

Gareth

PaulH

User Avatar

1346 Posts
Member #: 2340
Post Whore

Dublin Ireland

26th Oct, 2011 at 09:37:05pm

I all ways aim for 0.002" clearance but in a high rpm application I would settle for 0.025".

And 0.0025" is total Clarence In my book

Edited by PaulH on 26th Oct, 2011.

On 17th Feb, 2009 Rob H said:
I find the easiest way is to super glue the bolt to the end of one of my fingers.

______________________________________________________

BENROSS

User Avatar

9812 Posts
Member #: 332
Resident Cylinder Head Modifier

Mitsi Evo 7, 911, Cossie. & all the chavs ...... won no problem

27th Oct, 2011 at 06:06:43pm

nice and tight its 0.002" overall skirt clearence 0.001" each side, but on a balistic motor like paul says increase it





Home > Help Needed / General Tech Chat > Piston to bore clearance
Users viewing this thread: none. (+ 1 Guests)  
To post messages you must be logged in!
Username: Password:
Page: