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Posted: April 14th, 2011, 12:49 pm
by blownbillybob
oggo69 wrote:not getting into a slagging match as such but sticking to the pics , if an apprentice drilled that hole off centre he would be on sweeping and coffee duties for a month .
fogive my ignorance but are the bores done on a mill , lathe or line borer ?
DeWalt cordless
4Zs pics
Posted: April 14th, 2011, 1:02 pm
by blownbillybob
4Zs pics
www.community.webshots.com/user/4zsnow
He still has some pics of glens work done back in 08'
The only reason I can come up with for the holes in the skirts is the finish of the cyl was so rough that it was scoring the piston skirts at the 4 corners because the cyl couldn't hold the oil so his fix was to drill some holes in the pistons to push oil in those areas. It was a bandaid for a incorrect cyl wall finish??????
Posted: April 14th, 2011, 1:22 pm
by Roostius_Maximus
Posted: April 14th, 2011, 1:30 pm
by oggo69
ah vertical borer . adam i take it thats ur one ? sweet
Posted: April 14th, 2011, 2:22 pm
by blownbillybob
I see someone has been working on some new fixtures!!!
NICE!!!!!!
Posted: April 14th, 2011, 2:29 pm
by Roostius_Maximus
ya, thats mine. Only had about 10 cyls thru it sofar. does a hell of a nice job
the hone is in the background
Re: 4Zs pics
Posted: April 14th, 2011, 4:18 pm
by 100hp honda
blownbillybob wrote:4Zs pics
www.community.webshots.com/user/4zsnow
He still has some pics of glens work done back in 08'
The only reason I can come up with for the holes in the skirts is the finish of the cyl was so rough that it was scoring the piston skirts at the 4 corners because the cyl couldn't hold the oil so his fix was to drill some holes in the pistons to push oil in those areas. It was a bandaid for a incorrect cyl wall finish??????
there was another dude that got a shit gss bore way before 4Z. think it was back in '06 or some where around that time.
Posted: April 14th, 2011, 6:03 pm
by AlisoBob
blownbillybob wrote:I see someone has been working on some new fixtures!!!
NICE!!!!!!
X2
I asked Adam why it isnt being bored with the torque plate on? He said his current one isnt compatible with the with of the boring head cross-section.. but he's designing one soon so that from start to finish the cylinder will be properly stressd.
x 491
For now, he leaves it undersized enough so the final honing still take it to perfectly round with the torque plate on...
Posted: April 14th, 2011, 6:22 pm
by Roostius_Maximus
I need to leave atleast .004", honing shows me the load it's taking, says if I leave .003" it's stil not to the bottom of the disturbed material from the boring process.
= a full density cylinder wall that will last longer and not immediately wear out
There's more to this R&D Than some recognize
Posted: April 14th, 2011, 6:44 pm
by Kuma
AlisoBob wrote:blownbillybob wrote:I see someone has been working on some new fixtures!!!
NICE!!!!!!
X2
I asked Adam why it isnt being bored with the torque plate on? He said his current one isnt compatible with the with of the boring head cross-section.. but he's designing one soon so that from start to finish the cylinder will be properly stressd.
x 491
For now, he leaves it undersized enough so the final honing still take it to perfectly round with the torque plate on...
I was wondering the same thing, thanks Bob for the catch and 'spanation
Posted: April 14th, 2011, 6:46 pm
by Kuma
Nice equipment Roosty!
Is there any issues sending parts back and forth across the border?
Posted: April 14th, 2011, 7:06 pm
by Roostius_Maximus
Not usually, if it comes and goes in the mail with a value under 200$ or so it slips by, occasionally i have one come in and i pay 6% of the declared value. Never heard of any such charges when heading back to the USA.
I've done the shipping deal for a few years now, decompressors, parts, whatever, never had an item lost
Posted: April 14th, 2011, 9:05 pm
by AlisoBob
Kuma wrote:Nice equipment Roosty!
Those Rottlers arent cheap...... not at all.
But you still need a machinist with some brain power to spin the knobs the right way...
Posted: April 15th, 2011, 7:15 am
by blownbillybob
Roostius_Maximus wrote:I need to leave atleast .004", honing shows me the load it's taking, says if I leave .003" it's stil not to the bottom of the disturbed material from the boring process.
= a full density cylinder wall that will last longer and not immediately wear out
There's more to this R&D Than some recognize
Leaving the cyl a tho smaller is know big deal when using a power hone ,maybe 2 mins more hone time on a single cyl, now if your hand honing or using a rod machine with a AN hone head then forsure you would want to bore with a torque plate just cause that's a tho more you have fight (hone) out of it.
And ain't even going ther for a ball hone
Posted: April 15th, 2011, 7:54 am
by Roostius_Maximus
no, i'm saying the loose material from the boring tip is not completely removed unless we go .004"
I had been sizing them on a rod machine with sunnen GY25J67 stones, worked excellent and it can be done true and strait, and it didnt take long, but the rottler has a guage to show the load of the stone, so i can tell if the bore is properly sized past where the boring head loosened it.
Posted: April 15th, 2011, 4:27 pm
by racein01
AlisoBob wrote:Kuma wrote:Nice equipment Roosty!
Those Rottlers arent cheap...... not at all.
But you still need a machinist with some brain power to spin the knobs the right way...
x 491
Posted: April 16th, 2011, 8:05 pm
by AlisoBob
OU812 wrote:I sent a barrel to Glen, shame the pic does not really show how bad it was but you can see it some what. the bridge goes totally snaky on both sides, not a good thing. When I went to install the new supplied piston it would not even go half way in. Glen says "it just dirty clean it" WTF? sorry dude it ain't dirty. sent it back on my coin, comes back to be and he took the piston and sanded it, looks like a poor hand job, paid big money for amateur work.
He them blames the work on some kid he had working in the shop "Had to let him go"
Gee glad I was your guinea pig for your minimum wage kid learning to port.
To each his own.
Posted: April 16th, 2011, 8:18 pm
by fastkart
That shaky bridge looks familiar... I have one like that too.
Posted: April 16th, 2011, 8:27 pm
by AlisoBob
The piston stuck in the bore is the troublesome part.........
Seems like its commonplace.
Posted: April 16th, 2011, 8:39 pm
by 100hp honda
end of the exh is hogged so far its now much bigger than the manifold
part of the full race package i suppose
Posted: April 16th, 2011, 8:42 pm
by 100hp honda
good thing roostius is around. otherwise bob probly still be runnin the variable port stuff
Posted: April 16th, 2011, 10:08 pm
by AlisoBob
100hp honda wrote:end of the exh is hogged so far its now much bigger than the manifold
part of the full race package i suppose
My "Trailport" was the same way..... pure shit.
Posted: April 17th, 2011, 8:55 am
by Roostius_Maximus
you can cut that exhasut that big, aslong as its the same width all the way arround and doesnt blow behind the flange.
You can make it bigger without a lip and make a flange, but its super crappy the way its done in that pic
Posted: April 17th, 2011, 9:04 am
by 100hp honda
wonder what the ratio of areas are between the window at sleeve and the end of the port ?
Posted: April 17th, 2011, 9:07 am
by Roostius_Maximus
i could talk out my ass, but i do have all that in my notes at the shop, atleast for my own work i do.