entropy
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posted August 15, 2007 10:51 AM
 Edited By: entropy on 15 Aug 2007 15:01
Tim,
Good tip on the exh tolerance. I was under the impression that .080" was min for exh.
They all happened at NEAR the same crank angle. I measured at 2.5degree increments and it was clear that the real min was near but not exactly on the same place because at 2.5 before and 2.5 after it wasn't always symmetrical.
Here is a symmetrical one
bTDC_10.0 na
5.0 na
TDC__00.0 0.062
2.5 0.053
5.0 0.045
7.5 0.042
10.0 0.040 = min int VTP; #1 quench = .035", Int cam CL =103
12.5 0.042
15.0 0.047
here is an asymmetrical one
bTDC_10.0 na
5.0 na
TDC_0.072
2.5 0.063
5.0 0.055
7.5 0.051
10.0 0.050 = min int VTP; #1 quench = .035", Int cam CL =105
12.5 0.052
15.0 0.057
However, the VTP readings are probably +/- .001" also, so i didn't get too worried about it.
But, I was absolutely amazed at how consistent my reverse engineered version of the "TimChin patented VTP tool" (aka Tim's 14" tool) was.
That tool + having the ends of the cams turned down to .750, makes VTP determination really satisfying.
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entropy
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posted August 15, 2007 10:59 AM
Edited By: entropy on 15 Aug 2007 12:00
Gary,
I am behind schedule on this build by a week due to a lil glitch, but still might go to Andy's this weekend.
Or more likely, i might do some honey-do's. I'm driving to New England next week, taking my daughter back to school, so better treat wifey nice before I go 
Piston pic?: here's one... (barbies were attending an NA meeting)
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tcchin
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posted August 15, 2007 11:47 AM
Edited By: tcchin on 15 Aug 2007 16:29
I have a 14" tool? That really flies in the face of traditional racial profiles, eh?
BTW, your natural-light still photos are fabulous!
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TRNorBRN6001
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posted August 15, 2007 05:39 PM
Very lovely piston!
New England, thats a bit of a drive. Becareful and have fun!
My bro and I might make a run to Indiana in a couple of weekends as well, as he has been eyeing a hairdryer bike out that way.
There always seem to be little glitches no matter how careful you plan. Hope yours come
out smooth and easy.
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entropy
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posted August 15, 2007 11:25 PM
quote:
I have a 14" tool? That really flies in the face of traditional racial profiles, eh?
BTW, your natural-light still photos are fabulous!
bahahahahahahaha, and by the way, it's a 16" tool!
hi-ho, hi-ho, its off to garage I go...
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entropy
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posted August 15, 2007 11:29 PM
quote:
Very lovely piston!
New England, thats a bit of a drive. Becareful and have fun!
My bro and I might make a run to Indiana in a couple of weekends as well, as he has been eyeing a hairdryer bike out that way.
There always seem to be little glitches no matter how careful you plan. Hope yours come
out smooth and easy.
Indiana is also a a "bit of a drive". Robert getting a turbo???? From Motorhead???...
At least I get to fly back,
AND I'm gonna have lunch w/Y2K a week from yesterday, get a tour of his new head machine.
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entropy
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posted August 16, 2007 03:32 AM
Edited By: entropy on 16 Aug 2007 04:40
quote:
I always enjoy looking at shiney engine stuff, maybe a Garage Barbie as well!
Well here you go Gary!
Garage Barbies just got outa rehab and are back home in the garage helping out where they can:
[img] [/img]
[img] [/img]
[img] [/img]
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TRNorBRN6001
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posted August 16, 2007 05:34 AM
I don't know what he is looking at just yet, but he just asked me if I would help with driving
to Indiana one weekend in two or three weeks as he was looking at a bike in those
parts. If it is a motorhead turbo it will probably come part in a ziplock sandwich bag and
the other part in a used Doritos bag. Just kidding...................................................but not really.
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psycho1122
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posted August 16, 2007 06:02 AM
Question entropy; will you be doing anything with your piston tops?
You have alot of sharp edges for that high of compression. I widdled mine down to help reduce "Hot" spots.
Also, will you be thightening up your quench?
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VincentHill
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posted August 16, 2007 07:33 AM
quote:
Question entropy; will you be doing anything with your piston tops?
You have alot of sharp edges for that high of compression. I widdled mine down to help reduce "Hot" spots.
Also, will you be thightening up your quench?
Same question here! The looks like a VERY Sharp edge in the Middle of the combustion Chamber. You may want to use a Rubber abrasive wheel very lightly and polish the edges specially the on in the center.
I was really looking at the HIGH Compression and realized that you are not using any NOS
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entropy
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posted August 16, 2007 10:10 AM
the edges are not all that sharp, but point well taken. Too late this build anyway, i bolted the head on this morning.
psycho,
my min quench is as tight as i can get it with this combo.
#1- .035; #2-.032; #3=.033; #4=.036
I'd like all 4 cyl to be at .030, but lil differences in rod length and crank throw unfortunately give a spread from .032 to .036. My thinnest base sim is .005, so going to the next tighter quench puts #2 at .027". I don't want to go that tight. Could have had the block ground .002, but didn't want to do it this time around. I have had enough block issues as it is...
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osti33
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posted August 16, 2007 12:37 PM
quote:
the edges are not all that sharp, but point well taken. Too late this build anyway, i bolted the head on this morning.
psycho,
my min quench is as tight as i can get it with this combo.
#1- .035; #2-.032; #3=.033; #4=.036
I'd like all 4 cyl to be at .030, but lil differences in rod length and crank throw unfortunately give a spread from .032 to .036. My thinnest base sim is .005, so going to the next tighter quench puts #2 at .027". I don't want to go that tight. Could have had the block ground .002, but didn't want to do it this time around. I have had enough block issues as it is...
Sweet!! Get that sucker fired up. 
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psycho1122
Pro
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posted August 16, 2007 06:12 PM
I can understand your concern with your stroke.
I run my 1270 at .027 quench. (no base gasket) 
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dougmeyer
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posted August 16, 2007 07:01 PM
Edited By: dougmeyer on 16 Aug 2007 20:04
I massage them a little more than that. It's kind of a ritual for me. Putting my "touch" on the parts and all. But that's just me. It's a Doug thing.
Oh yeah, and let's see more of The Barbies......
You're sick Karl
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psycho1122
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posted August 16, 2007 07:27 PM
I agree Doug, I took some of your advise back in the day!
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zx12mark
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posted August 16, 2007 09:05 PM
i think karl is going to have to install titanium rods in his arms to keep from tearing them off his shoulders when he cracks that bastard.
video the first time you start it so we can hear it's first breath.
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tcchin
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posted August 16, 2007 10:12 PM
...Is Doug admitting to massaging the Garage Barbies, putting his touch on their parts and all?! (Note that I've ALT+PRT SC'd this page and saved it as a JPG in offsite storage, just in case Doug decides to edit his post again.)
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entropy
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posted August 17, 2007 04:42 AM
Edited By: entropy on 17 Aug 2007 05:48
DougMeyer says: quote:
I massage them a little more than that. It's kind of a ritual for me. Putting my "touch" on their parts and all. But that's just me. It's a Doug thing.
Oh yeah, and let's see more of The Barbies......
You're sick Karl
Yep, i'm sick, but it's good to know that I'm not alone! 
I had the head off since degree-ing the cams last Sun, so I re-checked/tweaked CL's this am, and the GB's were right there lending a hand
Irene-Barbie wants to show you how easy it is to get good dial indicator reading with the end of the intake cam machined down and the cam cap trimmed back
Barbie # 2 points out the same machining/trimming on the exhaust cam
Barbies back at home.
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dougmeyer
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posted August 17, 2007 03:42 PM
NOT THE BARBIES, TC, THE PISTONS!
You're crackin' me up Karl!
I especially like the second to last one- She's massagin' the cam lobe.... LOL!!!!
we are so weird
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tcchin
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posted August 17, 2007 05:35 PM
Ah yes, the pistons!
Personally, I like the up-skirt of the Dial Indicator Extension Brace Barbie in that same photo. Makes cam timing a little more participatory, I would think.
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dougmeyer
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posted August 17, 2007 06:28 PM
I just can't look at that picture without losin' it laughing.
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osti33
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posted August 17, 2007 09:25 PM
Great pics Karl! I'm crackin up over here.
Their is some great info in this thread too.
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entropy
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Posts: 8671
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posted August 17, 2007 10:32 PM
Machining down the ends of the cams and trimming back the cam cap makes setting CL's and VTP measurement WAY easier / reproducible.
There has to be a down side waiting to bite me in the ass; too good to be true.
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Hells Dark Lord
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posted August 18, 2007 03:30 AM
all the numbers are greek to me, but the pics are making laugh my arse off.....lol
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entropy
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Posts: 8671
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posted August 18, 2007 05:54 AM
quote:
all the numbers are greek to me, but the pics are making laugh my arse off.....lol
aha! Another sicko!
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