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Author Topic: XXO/BVGC '38 Chevy Coupe Build  (Read 1029865 times)

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Offline Milwaukee Midget

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Re: XXO/BVGC '38 Chevy Coupe Build
« Reply #225 on: March 01, 2011, 08:27:01 PM »
Quote from: desotoman on March 01, 2011, 08:11:40 PM
Quote from: Rex Schimmer on March 01, 2011, 09:30:35 AM

Another thought would be to add a 1/2 to 3/4 plates over the entire top of the of each cylinder bank, secure this plate to the block with counter sunk or counter bored bolts that match the existing head bolt pattern then bore through the plate and install sleeves that include the plate thickness, then you can establish a new head bolt pattern into that plate which can be what ever you want. This would raise the deck height by what ever the plate thickness is but this looks like a "labor of love" project anyway so it is just a few more hours on the mill.

Again just "kibizing"!

Rex


Isn't there a rule against doing this type of thing? Something to the effect of deck height has to be within .150 of original deck height and original material. I could be wrong but I remember something to that effect in the rule book. Might want to check the intent of this rule.

Tom G.

I think it's just a two piece head with integral sleeves.   :wink:
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Offline 38flattie

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Re: XXO/BVGC '38 Chevy Coupe Build
« Reply #226 on: March 01, 2011, 09:03:45 PM »
Quote from: desotoman on March 01, 2011, 08:11:40 PM
Quote from: Rex Schimmer on March 01, 2011, 09:30:35 AM

Another thought would be to add a 1/2 to 3/4 plates over the entire top of the of each cylinder bank, secure this plate to the block with counter sunk or counter bored bolts that match the existing head bolt pattern then bore through the plate and install sleeves that include the plate thickness, then you can establish a new head bolt pattern into that plate which can be what ever you want. This would raise the deck height by what ever the plate thickness is but this looks like a "labor of love" project anyway so it is just a few more hours on the mill.

Again just "kibizing"!

Rex


Isn't there a rule against doing this type of thing? Something to the effect of deck height has to be within .150 of original deck height and original material. I could be wrong but I remember something to that effect in the rule book. Might want to check the intent of this rule.

Tom G.


Hmmm, it appears that I 'conveniently' forgot that one little detail.

Think they'll buy this line- "I think it's just a two piece head with integral sleeves." Lol!

I'm going to submit a request tomorrow, and see what the ruling is. If we can't, we can't. If that's the case, we'll continue modifying the version I've posted.

Thanks for pointing that out!

Sam Woodard got started on the roll cage, and sent me these pics tonight. You may remember, Sam did the cage for Hooley's Stude.
« Last Edit: March 01, 2011, 10:03:35 PM by 38flattie »
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Offline Peter Jack

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Re: XXO/BVGC '38 Chevy Coupe Build
« Reply #227 on: March 01, 2011, 09:23:11 PM »
Flattie, PM sent.
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Offline Milwaukee Midget

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Re: XXO/BVGC '38 Chevy Coupe Build
« Reply #228 on: March 01, 2011, 10:49:39 PM »
Well, why couldn't you just call it a cylinder head adapter plate?  That's essentially what it is.  It's bolted onto the block, so you haven't modified the block beyond what they've already okayed - in fact, the process could be reversed, because you haven't altered the block or deck height.  And there's no rule that says you can't sleeve a block in such a way that the sleeves extend past the deck.

As usual, I think Rex might actually be on to something.
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"Problems are almost always a sign of progress."  Harold Bettes
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Offline 38flattie

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Re: XXO/BVGC '38 Chevy Coupe Build
« Reply #229 on: March 01, 2011, 10:57:56 PM »
Haha! I think you guys are on to something!

...Or are you on something? Lol! :-D

I just sent a request off, and we'll see how it turns out. Here are the basics:

 
Can I bolt a 5/8 plate, with the bores, water passages, pushrod holes, etc.,to the deck, then bolt the heads to the plate?
 
Ideally, I'd like to sleeve the cylinders through the plate.
 
If this is not allowed, can I use the plate as part of a two-piece head? The void left were the new plate is cut out over the cylinder bore would be the bottom part of the combustion chamber, with no, or very little, chamber in the head, just the valves.

I'll keep you updated.


In the mean time, Dale, (BoredAndStroked here on the board), just finished our crank girdle design.

This is a thick piece of steel - 1.25" - must be plasma-cut out of plate, Blanchard ground on both sides, sides profiled on the mill on all cut surfaces and then all the holes done with a CNC milling machine. It is a lot of work - and we need it to "contain the beast" called horsepower  :-D

Here is the 3D model that Dale  just finished for the girdle - have to wait to validate the dimensions on a second block I just shipped to him.

I'll post the main caps and the final girdle/cap assembly later on this week.
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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 Milwaukee Midget

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Re: XXO/BVGC '38 Chevy Coupe Build
« Reply #230 on: March 01, 2011, 11:37:44 PM »
Quote from: 38flattie on March 01, 2011, 10:57:56 PM
Haha! I think you guys are on to something!

...Or are you on something? Lol! :-D


You're the one who lives in Colorado, pal.  I ain't got no prescription. :cry:
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Offline SPARKY

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Re: XXO/BVGC '38 Chevy Coupe Build
« Reply #231 on: March 01, 2011, 11:40:52 PM »
just don't drive down I-10 in Tx with that "script"  :-D  :cry:
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Offline Milwaukee Midget

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Re: XXO/BVGC '38 Chevy Coupe Build
« Reply #232 on: March 01, 2011, 11:59:09 PM »
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"Problems are almost always a sign of progress."  Harold Bettes
Well, I guess we're making a LOT of progress . . .  :roll:

Offline SPARKY

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Re: XXO/BVGC '38 Chevy Coupe Build
« Reply #233 on: March 02, 2011, 09:44:45 AM »
There have been numerous folks with legal scrips from other states busted in TX :-o
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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!

Offline Tman

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Re: XXO/BVGC '38 Chevy Coupe Build
« Reply #234 on: March 02, 2011, 11:19:50 AM »
And for 6 degrees, Willie Nleson tickets for Rapid City go on sale next Monday :cheers:
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Offline Stan Back

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Re: XXO/BVGC '38 Chevy Coupe Build
« Reply #235 on: March 02, 2011, 11:32:09 AM »
2.A.1 --

". . . crankshaft centerline to original deck height measurement shall be within .150" of original design;  original deck material and thickness shall be maintained to within .150" of original design."

Looks like there may be .300 combined to play with.  How about adapting already designed heads to the block.  Like Donovans or something.  What's the bore spacing match up to?

Stan
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Offline Stan Back

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Re: XXO/BVGC '38 Chevy Coupe Build
« Reply #236 on: March 02, 2011, 11:35:18 AM »
By the way, Buddy, passed your budget figure yet?

Stan
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Offline 38flattie

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Re: XXO/BVGC '38 Chevy Coupe Build
« Reply #237 on: March 02, 2011, 02:01:18 PM »
Bore spacing doesn't really match up with anything. I may cut some Hemi 241 heads in half, the re-weld at right spacing.

I'll probably just have to work and design around what I have. instead of the plate.



Quote from: Stan Back on March 02, 2011, 11:35:18 AM
By the way, Buddy, passed your budget figure yet?

Stan

Hahahaha!

I HAD a budget. Had to sell the '58 Del Ray to cover the overages. Now I'm selling the Graham Paige to finish the project.

All my wife keeps telling me is " You're NOT selling the Harley!"
« Last Edit: March 02, 2011, 02:03:39 PM by 38flattie »
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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 maguromic

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Re: XXO/BVGC '38 Chevy Coupe Build
« Reply #238 on: March 02, 2011, 02:22:51 PM »
What about the V4 guys running plates with Chevy and Subaru heads and are those engines illegal now? The way I read  the rule was you couldn't change the stock height by more than .150 but with a bolt on plate your not changing the height of the "stock block". Its entirely a different part.  Tony
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Offline 38flattie

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Re: XXO/BVGC '38 Chevy Coupe Build
« Reply #239 on: March 02, 2011, 03:01:17 PM »
I think the 3-piece head design is the one that will work.

If we use the space over the bore, that's created by the adaptor plate, as the bottom .625 of the cylinder chamber, we wouldn't have to change the deck height. We could use a pop-up piston, put virtually just the the top of the chamber and valves in the ' middle' section of the heads, and maybe get this through the committee.

The way I read the rules, this is all allowable. :-D

Biggest downside I can see, is 2 head gaskets per side.
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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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