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Old 01-04-2010   #1
rhipsher
 
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Location: Houston 90 Red ZR-1
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Default Trying a new bit for porting.

It was $50 but man does this egg shape bit makes short work of aluminum. And I didn't blow through any runners.



Setting them up on the cnc mill is a nice idea but in reality it actually cost more time setting them up than it's worth. I know because I've done them both ways.



My daughters are so curious about what their daddy's doing in the garage. One snaps a picture with her I-pod touch while the other one sneaks up behind me.

Yep I'm working on yours Clint.
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Old 01-04-2010   #2
Paul Workman
 
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Default Re: Trying a new bit for porting.

Looks like you're havin' too much fun there!

Is this another project? I thought you had done yours already (but I may be suffering from CRS disease:sign10.

Not intending to hijack your thread, but FWIW, I have a source for machine tools. You might have all the bits you need now, but if not, I can get bits for just over 1/2 of that $$$, depending on what it is. For example, you may want some long shank bits when you do the IHs.

For anyone else that is contemplating a P&P project, I can make you a kit containing three bits (much like the ones pictured), a sanding drum and sleeves, and some flap wheels for about $130: Everything you need so you too can become a "Carbide Cowboy" (as Ryan puts it).






Ripsher is right. So, what's keepin the rest of ya? Dive right in! There is "Gold" (BIG hp to be had) in them thar plenums (etc)!!

P.
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90 #1202
"FBI" top end ported & relieved
Cam timing by "Pete the Greek"
Sans secondaries
Chip & dyno tuning by Haibeck Automotive
SW headers, X-pipe, MF muffs

Former Secretary, ZR-1 Net Registry

Last edited by Paul Workman; 01-04-2010 at 06:39 AM.
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Old 01-04-2010   #3
tomtom72
 
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Default Re: Trying a new bit for porting.

As the worm guys said in MIB II after the GatBot shot up the elevator ....." too scared!"

Besides, I don't know any one near me that is good with welding aluminum to correct my mistakes...some day when I get a real garage that I own, I'll be knocking on your door Paul!

But yes, it looks like Rick is having waaay toooo much fun!
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Old 01-04-2010   #4
billybaloneey
 
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Default Re: Trying a new bit for porting.

I was hoping what you were working on, was mine .

But I am a little disappointed that you're doing mine in your garage, and not in your bathroom...like the pictures of your first porting job...your wife must have laid down the law...,"NO MORE OF THAT CRAP IN MY HOUSE!!!!!!"
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'94 - C4 ZR-1 #445 - Black/Black
'05 - C6 silver/black 6sp
'85 - C4 white/graphite (almost done) automatic
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Old 01-04-2010   #5
rhipsher
 
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Default Re: Trying a new bit for porting.

I'll siamese the plenum tonight and then its pretty much all down hill from there porting the I/H's. Hey Paul are you just about done with the heads?
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Old 01-04-2010   #6
mgbrv8
 
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Default Re: Trying a new bit for porting.

I recomend these for finishing they work great
http://www.directindustry.com/prod/a...42-373002.html

Dave
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Old 01-05-2010   #7
Paul Workman
 
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Default Re: Trying a new bit for porting.

Quote:
Originally Posted by rhipsher View Post
I'll siamese the plenum tonight and then its pretty much all down hill from there porting the I/H's. Hey Paul are you just about done with the heads?
Done with the heads?

A man used to cast very ornate bronze doors - bought by banks and architects as finishing touches for their skyscrapers, etc. He would cast them and then lay them on his work bench and start polishing all the ornate scroll work etc.

When someone asked: "How long does it take to polish one of your doors?" the man answered, "I don't know. They just come and take it away!"


The porting is essentially done. They're nearly modeled after Pete's insane heads to within .5 to 1mm in one parameter, but closer otherwise. I like his his shape a little better, in retrospect, but we're talking about a mm or perhaps a little more thickness on Pete's heads on the short radius: We'll see what the dyno says. I'm pressure testing them tonight, and if all goes well (no blowouts!), then on to do a little touch-up filling on a few of the "eyebrows" and then to the machine shop for the valve grinding. So, if all goes well, it is possible the engine could be back together - fresh as a daisy - (and ready to kick some butt) before the end of the month??

Stay tuned!

P
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Good carz, good food, good friendz = the best of timez!

90 #1202
"FBI" top end ported & relieved
Cam timing by "Pete the Greek"
Sans secondaries
Chip & dyno tuning by Haibeck Automotive
SW headers, X-pipe, MF muffs

Former Secretary, ZR-1 Net Registry

Last edited by Paul Workman; 01-05-2010 at 06:49 AM.
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Old 01-05-2010   #8
rhipsher
 
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Default Re: Trying a new bit for porting.

Quote:
Originally Posted by Paul Workman View Post
Done with the heads?

A man used to cast very ornate bronze doors - bought by banks and architects as finishing touches for their skyscrapers, etc. He would cast them and then lay them on his work bench and start polishing all the ornate scroll work etc.

When someone asked: "How long does it take to polish one of your doors?" the man answered, "I don't know. They just come and take it away!"

The porting is essentially done. They're nearly modeled after Pete's insane heads to within .5 to 1mm in one parameter, but closer otherwise. I like his his shape a little better, in retrospect, but we're talking about a mm or perhaps a little more thickness on Pete's heads on the short radius: We'll see what the dyno says. I'm pressure testing them tonight, and if all goes well (no blowouts!), then on to do a little touch-up filling on a few of the "eyebrows" and then to the machine shop for the valve grinding. So, if all goes well, it is possible the engine could be back together - fresh as a daisy - (and ready to kick some butt) before the end of the month??

Stay tuned!

P
Awsome! When I was at Corey's last week I asked him what he would charge to turn mine into a 368 when I can afford to. He said done right your looking at the 16K range. He said a 368 usually runs in the 425 to 450rwhp range. He said he is bringing his 368 out of retirement and getting everything freshened up.
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