ls1290

iTrader: (20)

I was wondering if a stock, 3.89" bore, block be over bored? Say like 0.030" or 0.040" over? TIA

GeorgeC

The factory spec on 2000-up blocks is .010 overbore, but I do know for a fact that some blocks can be taken out more than that if they are sonic tested and shown to be thick enough in the critical areas... I had a .050 over aluminum block for a short time.

SJH

.050?
Wiseco pistons are .005 over FYI.

XLR8NSS

iTrader: (4)

Yep, Stock aluminum blocks are boring. <img border="0" title="" alt="[Razz]" src="gr_tounge.gif" /> <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

Ragtop 99

iTrader: (7)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by GeorgeC:
<strong>
I had a .050 over aluminum block for a short time.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Most of us like to measure engine life in years, not minutes! <img border="0" title="" alt="[Razz]" src="gr_tounge.gif" /> <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

GeorgeC

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by ls1290:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by GeorgeC:
<strong>I had a .050 over aluminum block for a short time.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Why only a 'short' time?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">To make a long story short, a wristpin broke just after initial break-in (evidently a defective part), doing some pretty major damage along the way. Since the block and 2 pistons had to be replaced anyway, I just decided to go ahead and do a 4.100" bore motor this go around...

GeorgeC

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by SJH:
<strong>.050?
Wiseco pistons are .005 over FYI.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Yes, .050, as in 3.950" bore, 355cid... I had a hard time with it at first too... It seems to be a little more commong than a lot of people would suspect, though. You just have to find the right block.

BADZ

iTrader: (5)

What did you use for lifters on your 1st set up GC? 2nd set up?

ls1290

iTrader: (20)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by GeorgeC:
<strong>I had a .050 over aluminum block for a short time.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Why only a 'short' time?

GeorgeC

Comp "R" lifters were in the old motor.

I am going the solid roller cam route now, with Crane lifters...