XXO/BVGC '38 Chevy Coupe Build

Started by 38flattie, July 21, 2010, 06:34:16 AM

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38flattie

#180
February 21, 2011, 08:11:26 AM
Thanks for the advice, Gary!


As you can see in the pic, I have about 2" clearance. That is a 2.5" piece of square tubing. The oil pan has more clearance, and still needs to be made shallower.

I had to use a Ford FE bellhousing, so it fits differently than the factory bellhousing

Is 2" enough at the bellhousing?

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

Peter Jack

#181
February 21, 2011, 11:13:45 AM
In oval track racing we've been known to trim the bottom of the bellhousing flange flat to obtain extra clearance.

Pete

Rex Schimmer

#182
February 21, 2011, 12:34:35 PM
I agree with Pete, wack of the bottom of the adapter flange, you have plenty of bolts and if you are going to dry sump the engine I would make the pan as flat as possible, all of this allows you to run the car closer to the ground which in a car like yours helps the aero. I know that you have pretty much got the engine in place and this  is your build and I am just a "kibezer" but I would raise the motor until nothing hangs below the frame rails and then lower the car until the frame rails are about 2 inches of the ground. The idea is to keep as much air as possible from going under the car and the air that does should see as much flat surface, i.e. oil pan, bell housing, cross members etc as possible. Having things like cross members hanging down in the wind only cause drag which requires hp to over come. Don't let the loading and unloading of the car from the trailer be the deciding factor on how you make the bottom of the car low and slick.

Rex
Rex

Not much matters and the rest doesn't matter at all.

38flattie

#183
February 22, 2011, 09:08:50 AM
Peter, Rex, I like the idea of trimming the adapter and bellhousing flange. I had forgotten that we used to do that on roundy rounders!

Rex, I agree that sitting the engine, so that the lowest part is between the frame rails would be optimum. I don't, however, like the high center of gravity of the engine, when it sits that way. Remember, this is why I gave up the Coupe class, and went with the setback. In Comp Coupe, there will be a bellypan, so that should help some.

Maybe I'm being over cautious, having never ran on the salt. I'm trying to avoid spinning, and if I do, I want the CG as low as possible. It is entirely possible/probable, that after running this year, I will rethink this whole setup, and do as you suggest next year!

Please keep the suggestions and critiques coming, as they are very helpful!
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

38flattie

#184
February 23, 2011, 06:10:39 PM Last Edit: February 23, 2011, 06:19:27 PM by 38flattie
The cam blanks came today! There are no blanks available, save having custom billet ones made. I looked for two years, calling every cam maker I could find. Finally, I had Joe Paneck at Roto-Faze make two for me.

Instead of a Caddy snout, it has a BBC snout, to fit the Donovan gear drive.

A stock cam has .334 lift. We'll use this cam for .525 lift, and 280 duration
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

Buickguy3

#185
February 23, 2011, 06:26:50 PM
  Hmmm! Wonder if thet'd be interested in doing a straight 8 Buick blank?  :cheers: :cheers:
I keep going faster and faster and I don't know why. All I have to do is live and die.
                   [America]

38flattie

#186
February 23, 2011, 06:33:08 PM Last Edit: February 23, 2011, 07:12:30 PM by 38flattie
Quote from: Buickguy3 on February 23, 2011, 06:26:50 PM
 Hmmm! Wonder if thet'd be interested in doing a straight 8 Buick blank?  :cheers: :cheers:

PM sent with Joe's contact info.
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

RichFox

#187
February 23, 2011, 06:40:33 PM
Quote from: Buickguy3 on February 23, 2011, 06:26:50 PM
  Hmmm! Wonder if thet'd be interested in doing a straight 8 Buick blank?  :cheers: :cheers:
Joe don't care. Give him a call.

Milwaukee Midget

#188
February 23, 2011, 07:17:21 PM
Quote from: Rex Schimmer on February 20, 2011, 11:13:25 AM
What does the other side of the head look like??
Rex
Quote from: Tman on February 20, 2011, 06:03:02 PM
I would pass as well, gotta keep at least ONE ace up yer sleeve :-D

Well, there's clearly two routs about .525 deep.  :-D

Now if we can get a good look at the pistons, we might be able to figure it out.

Rex, Tman, I don't think I want to play poker with this guy . . . .
"Problems are almost always a sign of progress."  Harold Bettes
Well, I guess we're making a LOT of progress . . .  :roll:

38flattie

#189
February 23, 2011, 07:45:31 PM Last Edit: February 23, 2011, 08:18:42 PM by 38flattie
Quote from: Milwaukee Midget on February 23, 2011, 07:17:21 PM
Quote from: Rex Schimmer on February 20, 2011, 11:13:25 AM
What does the other side of the head look like??
Rex
Quote from: Tman on February 20, 2011, 06:03:02 PM
I would pass as well, gotta keep at least ONE ace up yer sleeve :-D

Well, there's clearly two routs about .525 deep.  :-D

Now if we can get a good look at the pistons, we might be able to figure it out.

Rex, Tman, I don't think I want to play poker with this guy . . . .


Haha! All will be revealed, just not yet...

I will show you something I'm working on for a 324 CID engine. Call it phase 2...
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

Dr Goggles

#190
February 23, 2011, 09:11:23 PM
Quote from: 38flattie on February 21, 2011, 08:11:26 AM
Is 2" enough at the bellhousing?

I'm thinking a skid plate wouldn't be a bad idea......it's not unheard of to get a bit of air here and there ( :roll:)and even if all four wheels stay on the deck any bumps are exagerated by the speed.....with limited suspension that means bottoming out pretty hard, something smooth is better than an abrupt edge that might plow the salt or worse still upset the car................................

Great build by the way.
Few understand what I'm trying to do but they vastly outnumber those who understand why...................

http://thespiritofsunshine.blogspot.com/

Current Australian E/GL record holder at 215.041mph

THE LUCKIEST MAN IN SLOW BUSINESS.

jimmy six

#191
February 23, 2011, 09:48:24 PM
I would definately be careful with a skid pad......ANYTHING considered "aero" in gas coupe especially in vintage could cause a problem in impounds.........Good Luck
First GMC 6 powered Fuel roadster over 200, with 2 red hats. Pit crew for Patrick Tone's Super Stock #49 Camaro

desotoman

#192
February 23, 2011, 10:33:43 PM
How small is the base circle going to be on the cam with .525 lift? What is the minor diameter of the camshaft?

Tom G.
I love the USA. How much longer will we be a free nation?

Asking questions is one's only way of getting answers.

The rational person lets verified facts form or modify his opinion.  The ideologue ignores verified facts which don't fit his preconceived opinions.

SPARKY

#193
February 24, 2011, 05:36:52 AM Last Edit: February 24, 2011, 05:39:31 AM by SPARKY
Guys,  It looks to me like "the price of poker" in this game is going way UP  :cheers:
Miss LIBERTY,  changing T.K.I.  to noise, dust, rust, BLUE HATS & hopefully not scrap!!

"Security is mostly a superstition. It does not exist in nature, nor do the children of men as a whole experience it. Avoiding danger is no safer in the long run than outright exposure. Life is either a daring adventure or nothing."   Helen Keller

We are going to explore the racing N words NITROUS & NITRO!

LittleLiner

#194
February 24, 2011, 05:49:45 AM
Quote from: 38flattie on January 24, 2011, 05:13:49 PM
. . . . The Flatcad that ran in the early '50's.

"The  car was the DuNah-Goldman entry from Pasadena. It had a 347" '36 Cad for power. It ran 133.130 mph in '50 and 133.729 mph in '51 at the salt. It also ran 143.31 at the lakes in '50. This car was a '28-29 roadster body with a belly pan and race car nose without a grill opening. A picture of it can be found on the ahrf.com website, key number GGC_167."

The website is download protected, but I'm trying to get a picture of the car, from Jim Miller.    . . . . .
I was able to pull a copy of the photo you mentioned.  Quality might be a bit low because of the duplicating process I had to use.  Anyway, is this the car you mentioned?   
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