I just recieved my 1.8 84.5mm Dart block today. I was reading that it hasn't been honed, and must be prior to installation. How much does honing usually take out of the block? Reason I ask, will I still be able to use 84.5mm pistons? Or will honing take the block past that?

-James

 

are they talking about a soft honning ?? I dont know why they could give you a brand new block not honed ??

 

Straight Honing I think. I believe is also must be decked .002"

 

A standard hone will usually create .0001 to .001" more bore. Justs depends on the machiner and how much you want to take out.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IMPORTant Si &raquo;</TD></TR><TR><TD CLASS="quote">I just recieved my 1.8 84.5mm Dart block today. I was reading that it hasn't been honed, and must be prior to installation. How much does honing usually take out of the block? Reason I ask, will I still be able to use 84.5mm pistons? Or will honing take the block past that?

-James</TD></TR></TABLE>

If you measure the cylinder bores, it's not bored out to 84.5mm from Dart, it's slightly less so you can take it to a machine shop for a final bore and hone, ensuring you get the correct clearance with your pistons. I have a NIB Tall deck Dart block and it was bored ~83.8mm when i got it, now i wait on my CP pistons to arrive before i get it bored to 85mm and honed( it's for a NA build). It also looks like it should be decked a few 0.001"