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The Cowboy Cadillac Revival

well i droped the heads off at the mechinest today and i looked at the block. .03 took all the rust out and cleaned it up really well. he had to deck the block .004 to clean them up. so i am definetly going to get the .10 ticker head gaskets now .
got the rebuild kit aswell its an engine tech kit. he swears by engine tech uses them on all the hot rod builds he does. he is going to drill out the broken off Gp.

I was wondering will the .03 change the compression any. i think that it should and then if i put the .01 head gaskets that will drop it some to. how do i figure out what my finally comp ratio is.
 
Bore x bore x stroke x .7854 = cyl cubic inch x 16.39 converts to cc, then check total cc of head, piston,deck height,and prechamber, and headgasket, then divide that into your cyl volume.
 
6.2 turbo said:
Bore x bore x stroke x .7854 = cyl cubic inch x 16.39 converts to cc, then check total cc of head, piston,deck height,and prechamber, and headgasket, then divide that into your cyl volume.
Click to expand...

ok thanks think im going to need some help figuring that one out. ill look into it tomorow. way to late to try and do that kind of math tonight
 
6.2 turbo said:
Bore x bore x stroke x .7854 = cyl cubic inch x 16.39 converts to cc, then check total cc of head, piston,deck height,and prechamber, and headgasket, then divide that into your cyl volume.
Click to expand...

what are the 2 bores for?
wait i might have just figured it out the bore is essentially the diameter of the hole and there for you use the same number twice?? is that any where near right?
 
Basically 2 volumes 1 is the volume of the cylinder So you take the dia and the stroke to compute that. 2 you have to calculate the volume of the head easiest way to do that is to cc the head. The 2 numbers should give you a ratio ie 21:1
 
well i got the block and heads back from the mechinest finally today (it was supposed to be done tuesday)
he ended up decking the block .004 to clean up the the area where the fire ring seals the cylinders. and he surfaced the heads by hand with a file and sanding to clean up the area around the fire ring.

the precups are all cracked. they are the square ones so i think changing them is in order any way.

where is the best place to buy them i was MGW post and she said that the after market ones are not as good as the Gm ones any thoughts on this
 
....and he surfaced the heads by hand with a file and sanding to clean up the area around the fire ring.....
Click to expand...

WHAT ?!?

You're kidding, right?

What is the name of your *machine shop*?
 
he is old school. way old school. he said he couldnt use the broach cause the precup just destroy the cutters and he didnt even want to take that much off just enough to smooth things out around the fire ring. they look smooth as a babys a$$.
 
well i got the pre cups installed. i was a bit worried at first i put a couple in and they didnt seat in far enough and where beyond the .002 allowable protrusion. :mad2: so i got all upset and figured i had to have more machine work done.:mad2: but luckly i was wrong i realized (thanks bk95) that there was alot of carbon that was caked in the corners of the receses. so i scraped it all out and they fit in nicely. :D here is a before and after shot of one of the holes before i cleaned it up.:thumbsup: also the prcups go in much easier when every thing is clean.

i should also mention that i wire brushed and scraped the precups so there was no carbon on them as well
 

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Well i finally got the pistons installed today. all the bearing oil clearances checked out fine got every thing lubed up really well and it all turns nicely.

had a rod bearing that had a nick in it right out of the package, called engine tech and they said they didnt have any and that they where over due (the shipment was due the first of the month and still hadnt come yet) so they told me to try and find one locally and get back with them so they could make it right, i got one from the parts store for $10 (they still havent called back and i left the message for them on monday)

all the pistons are flush with the surface of the deck is that how they are supposed to be??????
 
THe pistons should be fine as long as they don't go above the deck. Are you using standard head gaskets or the +.10 thickness?
 
the .010 thick ones im confused becaouse he said that he decked the block like .004. also does any one know what the gm part number is for the head alignment pins i know iv seen it some where around here before but i cant seem to find it
 
Not sure about the PN on them but i got mine from napa. IIRC they are the same as a bbc alignment dowels. I just took my old ones in and they matched them. I bought some spares in case i needed them again and couldn't find them.
 
GM doesn't stock the alignment pins any longer according to my local truck center guys (who are VERY good at hunting down parts, however obsolete.)

Here's the PN, in case you want to sleuth it further: 12558081

( Pasted from <http://www.thetruckstop.us/forum/showthread.php?t=629> )


But I'll bet if I'd tried to order BBC pins, they might well have shown up in their system. Either way, they're just a cheap roll pin. I'll bet Dorman or other similar outfits make them. Avail at most real auto parts counters.
 
well i got the block all painted and a good coat of clear over the top going to start putting all the parts back on tommorow hopefully.
 
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