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Author Topic: XXO/BVGC '38 Chevy Coupe Build  (Read 1029949 times)

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Offline fordboy628

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Re: XXO/BVGC '38 Chevy Coupe Build
« Reply #2280 on: April 23, 2014, 07:43:32 AM »
Quote from: 38flattie on April 22, 2014, 12:53:09 PM
Quote from: Jack Gifford on April 19, 2014, 12:34:48 AM
What O-ring wire diameter? Block groove width and depth? Receiver groove width and depth?

Wire:  .041

Groove Width in Head:  .0395 (interference fit - very important of it won’t stick!)

Groove Depth in Head:  .026

Protrusion:  about .015 proud (wire in the head)

Receiver Groove Width:  .055 to .060 (centered with the head groove)

Receiver Groove Depth:  .012 to .015


All these dimensions seem pretty normal for o-ring set-ups.    I suspect that the .085" (14 gauge? listed as .0863") thick copper conforms/deforms less than a 21 gauge sheet (.0320") or even an 18 gauge sheet (.0485")

 :cheers:
Fordboy
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Offline pops29

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Re: XXO/BVGC '38 Chevy Coupe Build
« Reply #2281 on: April 24, 2014, 09:59:06 AM »
Quote from: Jack Gifford on April 23, 2014, 12:32:29 AM
Thanks. With those odd-shaped rings/grooves, I assume you did the grooves with a CNC program? With locations referenced to head dowels?


 Yes I did -- I did both the dowels and the groves on the same setup

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Offline Jack Gifford

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Re: XXO/BVGC '38 Chevy Coupe Build
« Reply #2282 on: May 06, 2014, 02:06:55 AM »
It appears to me that the .080" gasket thickness defeated the intended function of the O-ring and receiver groove. Using your dimensions I sketched to scale a cross-section view. It looks as if the movement of the gasket into the receiver groove would be insignificant. The other scale-sketch is of the O-ring scheme in my blown alky hemi V8- where the receiver groove and the .024" gasket form a labyrinth-type seal.
« Last Edit: May 06, 2014, 02:13:36 AM by Jack Gifford »
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Offline fordboy628

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Re: XXO/BVGC '38 Chevy Coupe Build
« Reply #2283 on: May 07, 2014, 09:31:28 AM »
Quote from: Jack Gifford on May 06, 2014, 02:06:55 AM

It appears to me that the .080" gasket thickness defeated the intended function of the O-ring and receiver groove.
 

x2

 :cheers:
Fordboy
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Science, NOT Magic . . . .

I used to be a people person.  But people changed that relationship.

"There is nothing permanent except change."    Heraclitus

"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former."     Albert Einstein

Offline Roseville Carl

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Re: XXO/BVGC '38 Chevy Coupe Build
« Reply #2284 on: May 13, 2014, 11:22:06 PM »
Happy Birthday Buddy......... :cheers:
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Offline 38flattie

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Re: XXO/BVGC '38 Chevy Coupe Build
« Reply #2285 on: May 14, 2014, 10:29:52 AM »
Thanks Carl, and good luck at Eagle field!

We're headed to El Mirage, to run on a 185 MPH minimum in XXO/BFCC
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Offline Elmo Rodge

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Re: XXO/BVGC '38 Chevy Coupe Build
« Reply #2286 on: May 14, 2014, 11:16:37 AM »
When are you heading out, Buddy? Wayno
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Offline 38flattie

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Re: XXO/BVGC '38 Chevy Coupe Build
« Reply #2287 on: May 14, 2014, 11:58:38 AM »
Wayno, I fly into Sacramento tomorrow-I left the car, trailer, and truck out there. We'll be on the lake by 9 Friday morning.
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With sufficient thrust, pigs fly just fine. However, this is not necessarily a good idea. It is hard to be sure where they are going to land, and it could be dangerous sitting under them as they fly overhead. -- RFC 1925

You can't make a race horse out of a pig. But if you work hard enough at it you can make a mighty fast pig. - Bob Akin

http://www.flatcadracing.org/
http://youtu.be/89rVb497_4c

Offline saltwheels262

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Re: XXO/BVGC '38 Chevy Coupe Build
« Reply #2288 on: May 14, 2014, 05:52:13 PM »
good luck to you and all others going to em this weekend.
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Offline tauruck

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Re: XXO/BVGC '38 Chevy Coupe Build
« Reply #2289 on: May 14, 2014, 09:47:47 PM »
Have a blast Buddy.

We're always pulling for you from this side.

Be safe. :cheers:
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Offline 38flattie

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Re: XXO/BVGC '38 Chevy Coupe Build
« Reply #2290 on: May 14, 2014, 11:03:03 PM »
Thanks guys! I'll post up results of our escapades next Monday or so!
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With sufficient thrust, pigs fly just fine. However, this is not necessarily a good idea. It is hard to be sure where they are going to land, and it could be dangerous sitting under them as they fly overhead. -- RFC 1925

You can't make a race horse out of a pig. But if you work hard enough at it you can make a mighty fast pig. - Bob Akin

http://www.flatcadracing.org/
http://youtu.be/89rVb497_4c

Offline Roseville Carl

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Re: XXO/BVGC '38 Chevy Coupe Build
« Reply #2291 on: May 15, 2014, 03:12:05 PM »
Kool Buddy go gettum........ I will be thinking of you guys while running at Eagle, maybe next time you run down there I can make it!
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Offline kustombrad

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Re: XXO/BVGC '38 Chevy Coupe Build
« Reply #2292 on: May 18, 2014, 01:05:32 PM »
Saw the beast yesterday and I must say, what a cool car! Hearing the weight of the motor cracked me up (freakin' heavy!) and the difference from Ford to Caddy flathead was pretty cool! While I was standing there talking to (I believe Bored and Stroked) about pushing out head gaskets and other weird issues, I asked what size head studs he was running. I know guys who have run fuel in BBC motors and stepped up from the 1/2" studs for more clamping force, so I can't see how this motor can hold anything from moving around with 7/16" studs! The car is awesome and I love the concept, but if there's room I'd stuff 1/2" studs in there at the very LEAST! Just my opinion guys... see you on the salt!
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Offline 38flattie

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Re: XXO/BVGC '38 Chevy Coupe Build
« Reply #2293 on: May 27, 2014, 03:36:00 PM »
Quote from: kustombrad on May 18, 2014, 01:05:32 PM
Saw the beast yesterday and I must say, what a cool car! Hearing the weight of the motor cracked me up (freakin' heavy!) and the difference from Ford to Caddy flathead was pretty cool! While I was standing there talking to (I believe Bored and Stroked) about pushing out head gaskets and other weird issues, I asked what size head studs he was running. I know guys who have run fuel in BBC motors and stepped up from the 1/2" studs for more clamping force, so I can't see how this motor can hold anything from moving around with 7/16" studs! The car is awesome and I love the concept, but if there's room I'd stuff 1/2" studs in there at the very LEAST! Just my opinion guys... see you on the salt!

I think you are probably right, but it is too late for us to change this year-it is on the winter 'to do' list though.

For Bonneville, we'll have deeper head chambers, so we'll run a .035" thick head gasket, instead of the current .085" gasket-hopefully the O-rings will work better with the thinner gaskets.
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With sufficient thrust, pigs fly just fine. However, this is not necessarily a good idea. It is hard to be sure where they are going to land, and it could be dangerous sitting under them as they fly overhead. -- RFC 1925

You can't make a race horse out of a pig. But if you work hard enough at it you can make a mighty fast pig. - Bob Akin

http://www.flatcadracing.org/
http://youtu.be/89rVb497_4c

Offline 38flattie

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Re: XXO/BVGC '38 Chevy Coupe Build
« Reply #2294 on: June 04, 2014, 11:35:31 PM »
We've been busy modifying the exhaust
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With sufficient thrust, pigs fly just fine. However, this is not necessarily a good idea. It is hard to be sure where they are going to land, and it could be dangerous sitting under them as they fly overhead. -- RFC 1925

You can't make a race horse out of a pig. But if you work hard enough at it you can make a mighty fast pig. - Bob Akin

http://www.flatcadracing.org/
http://youtu.be/89rVb497_4c
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