Measured my blocks ridge,rigid hone ok or have to bore?

Measured my blocks ridge,rigid hone ok or have to bore? - 02/27/14 12:03 AM

Measured my 440 blocks cylinder bores and I'm trying to figure out what I want to do with it.
I really am trying to be lowbuck on this one, but I'll do what I need to do if necessary.

With a dial bore gauge, measuring the untouched top of each cylinder and just below the ridge...I get between .0013-.0015 wear (ridge). I'm tempted to just hone the cylinders as I may have a line on a new set of pistons for real cheap at the current bore.

To me (not a machinist and not really that knowledgable in this area) that seems like minimal wear and would hone right out with a ridged hone. As I don't have the pistons on hand...I can't measure them to see what exactly that would do to piston-to-wall clearances. They are KB Hyperuetic pistons which would put compression right where I want it to be.

Input is appreciated.....I figured as long as I don't exceed .0040" that they may be a bit noisey....but would be otherwise ok. Opinions?

Posted By: Crizila

Re: Measured my blocks ridge,rigid hone ok or have to bore? - 02/27/14 02:56 AM

"Low buck build", ridged hone it and run it.

Posted By: Quicksilver440

Re: Measured my blocks ridge,rigid hone ok or have to bore? - 02/27/14 03:00 AM

Quote:

"Low buck build", ridged hone it and run it.

My only hesitation is changing to the higher Compression height pistons.....

Posted By: MR_P_BODY

Re: Measured my blocks ridge,rigid hone ok or have to bore? - 02/27/14 03:03 AM

Only problem you will have is KB pistons normally
call for a tight piston to wall... you might be way
above that.... time to hone it and measure what you
get... then based on that make your call

Posted By: dogdays

Re: Measured my blocks ridge,rigid hone ok or have to bore? - 02/27/14 04:46 AM

KBs use MORE clearance than a stock 440 piston. It should work out fine.
Be sure the top ring won't catch on the ridge, though!

R.

Posted By: Quicksilver440

Re: Measured my blocks ridge,rigid hone ok or have to bore? - 02/27/14 06:05 AM

I thought the KB forged required extra clearance... while the KB hyperuetic can be run with, but like, less?

Posted By: MR_P_BODY

Re: Measured my blocks ridge,rigid hone ok or have to bore? - 02/27/14 07:49 AM

Quote:

I thought the KB forged required extra clearance... while the KB hyperuetic can be run with, but like, less?

Thats my understanding

Posted By: Quicksilver440

Re: Measured my blocks ridge,rigid hone ok or have to bore? - 02/27/14 08:03 AM

Quote:

Only problem you will have is KB pistons normally
call for a tight piston to wall... you might be way
above that.... time to hone it and measure what you
get... then based on that make your call

I'm sure your right....just didn't want to waste my time honing if it was way too much wear to even consider trying it.

I'll give her a try....

Posted By: 85_Ram_4speed

Re: Measured my blocks ridge,rigid hone ok or have to bore? - 02/27/14 01:17 PM

All the big blocks I have built for myself and others with KB hypers got .0025" piston to wall clearance set up as a fresh new build.

That said, you can run a little more, but it's not really recommended. If they are a domed piston and are in any way close to the chambers in the head, you may want to look at those clearances as the piston is going to move alot more. Also don't expect the the same ring and skirt wear as a tighter running piston.

On the cheap, it could work, but it won't be ideal for sure. But you already know that going in. And truth be known, would run ok for a cheap build. There certianly have been worse things done by others.

Posted By: Performance Only

Re: Measured my blocks ridge,rigid hone ok or have to bore? - 02/27/14 07:27 PM

Quote:

Quote:

Only problem you will have is KB pistons normally
call for a tight piston to wall... you might be way
above that.... time to hone it and measure what you
get... then based on that make your call

I'm sure your right....just didn't want to waste my time honing if it was way too much wear to even consider trying it.

I'll give her a try....

You should find an old block to practice on. It's very unlikely as a new user with the AN style hone that you'll get the cylinders straight and round and also with the correct cross hatch. Also, make sure the drill you use is variable speed so you can time the stroke vs. head rotation to work on the cross hatch.
I somehow manage to get a few of those blocks in every year that are pretty messed up because the user thought "how hard can it be?" It takes practice to get it right.

Posted By: CHAPPER

Re: Measured my blocks ridge,rigid hone ok or have to bore? - 02/27/14 07:46 PM

Quote:

Quote:

Quote:

Only problem you will have is KB pistons normally
call for a tight piston to wall... you might be way
above that.... time to hone it and measure what you
get... then based on that make your call

I'm sure your right....just didn't want to waste my time honing if it was way too much wear to even consider trying it.

I'll give her a try....

You should find an old block to practice on. It's very unlikely as a new user with the AN style hone that you'll get the cylinders straight and round and also with the correct cross hatch. Also, make sure the drill you use is variable speed so you can time the stroke vs. head rotation to work on the cross hatch.
I somehow manage to get a few of those blocks in every year that are pretty messed up because the user thought "how hard can it be?" It takes practice to get it right.

I don't try to hand hone blocks anymore. I have found that a good power honing with a Sunnen or equivalent to be much more accurate. As for the varible speed drill sugestion, I have used an air powered drill with a small regulator at the connection. This allows you to maintain the speed of the hone consistently. Also, a good rubber tarp strap, hooked to the drill, and supported by an engine hoist, allows the up/down movement to be made without so much back pain.

Posted By: Quicksilver440

Re: Measured my blocks ridge,rigid hone ok or have to bore? - 02/27/14 07:56 PM

I appreciate your guys input/advice. I will definitely try my hand on a junk block first. Don't want to screw it up...but I sure like to do things myself and learn. Spent more on tools than farming it out would have cost for sure...but I like to try things.

I tried my hand at bpaint before...found out it wasn't for me! Lol...