i know you can go 86mm bore in a b sereis motor and still be safe how big can you go in a d series and be safe. just curious.

 

max safe bore for a B series would be 85mm, 86 is the max the sleeves can get bored to but its not the safest unless your running a super good tune on ems. 78mm would be the max safe bore after sleeving for a D series of course,now not talking safe some people have taken it to 79.5mm n/a of course.

 

word up thanks for that bit of info

 

for the street the max we'd bore to is 77mm for reliability and longevity.

Of course with a more hardcore setup, step it up to 78mm and if you want to take it even farther. go 79mm bore.


Here's how a 78mm bore sleeved D16A6 block looks like.

 

How much difference in reliability is there between 78 and 77mm bores on the A6? If the compression was under 12:1 and the revs were no more than 8k.

 

78mm will actually be fine still. Its more of a longevity decision and if you want to rebuild later for choosing a smaller 77mmbore.

Its kinda like when going 85mm all motor B-series. at 85mm its still possible to street it, but its at the edge you know. if you have to rebore later on to rebuild, the next size 85.5 and that usually isnt a good bore for a daily street car.

 

cool.

hey what are your cam profiles for the a6?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by exospeedAMcrx &raquo;</TD></TR><TR><TD CLASS="quote">for the street the max we'd bore to is 77mm for reliability and longevity.

Of course with a more hardcore setup, step it up to 78mm and if you want to take it even farther. go 79mm bore.


Here's how a 78mm bore sleeved D16A6 block looks like.

</TD></TR></TABLE>

I know this is not relevant to this topic, but how is this a d16a6 block, if it has a vtec oil plug between cylinders 2 & 3? A d16a6 block is non vtec.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by type_rev &raquo;</TD></TR><TR><TD CLASS="quote">

I know this is not relevant to this topic, but how is this a d16a6 block, if it has a vtec oil plug between cylinders 2 & 3? A d16a6 block is non vtec.</TD></TR></TABLE>


What??? That is not a "vtec oil plug". It's a plain old oil jet. Lots of non-vtec blocks have them. This is the oil jet you MUST REMOVE when doing a mini-me swap so VTEC engages.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mr Hammond &raquo;</TD></TR><TR><TD CLASS="quote">


What??? That is not a "vtec oil plug". It's a plain old oil jet. Lots of non-vtec blocks have them. This is the oil jet you MUST REMOVE when doing a mini-me swap so VTEC engages.</TD></TR></TABLE>

Yup

And that is a BAD *** block!

 

you made me think there for a second. LOL haha.

It is a D16A6 block. and Hammond is correct.

 

good stuff Wil.!!!