XXO/BVGC '38 Chevy Coupe Build

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

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38flattie

#1740
May 21, 2013, 02:47:06 AM
Jack, you're right.

We didn't have dowels last year, but we had tight head bolt clearances, assuring us of precise positioning. Installing/removing heads with tight head bolt tolerances is an extreme PIA, and time consuming. We added the dowels, and opened up the head bolt tolerances slightly, to insure we still had the needed alignment, and to make installation and removal easier.
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

Tman

#1741
May 21, 2013, 07:15:18 AM
Quote from: 38flattie on May 21, 2013, 02:47:06 AM
Jack, you're right.

We didn't have dowels last year, but we had tight head bolt clearances, assuring us of precise positioning. Installing/removing heads with tight head bolt tolerances is an extreme PIA, and time consuming. We added the dowels, and opened up the head bolt tolerances slightly, to insure we still had the needed alignment, and to make installation and removal easier.


Yeah, flatty heads can be a pain even with loose tolerances to pull.

38flattie

#1742
May 21, 2013, 04:02:22 PM
John K.(WZ JUNK) Has been slaving away! From John:

Front aero is done except for the black plastic on the bottom.

I will work on the flange for the hood sides and the grille area tomorrow.  This is nearly last area of fabrication.  The fit around the grille will be the last big thing.  It is all down hill now.

Looking good, John!
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

vintagehotrod

#1743
May 22, 2013, 06:54:22 PM
Buddy , you are out of control , what an amazing effort. I will do my best for you on dyno day. I would hate to be the guy that sinks this ship. You are doing everything right , cyl pressure will double from straight alky to just 20% with a blower. We will feed it right , plenty of fuel.

38flattie

#1744
May 23, 2013, 06:19:42 AM Last Edit: May 23, 2013, 06:25:57 AM by 38flattie
John, I'm really looking forward to the trek to Chico!

I learned a lot last year, and look forward to your help and mentoring again this year.

And again, a BIG thanks to Stan Back for directing me to you-he was right, in saying you were the man we needed to help us! :cheers:
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

#1745
May 23, 2013, 09:50:40 AM
John has been busting his hump!

From John:

What the starter at the starting line will see.

I will work on the fit around the grille opening and the front seam where the two fenders meet next.
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

redhotracing

#1746
May 23, 2013, 10:35:57 AM
Buddy- maybe I missed this, but how much whp
are you looking for with 20% nitro? How much are
you estimating to need to reach your goal of 200?
Luke- Winston Salem, NC
Loring 2 Club- 201.252 (2010)
Ohio 2 Club- 203.712 (2013)

38flattie

#1747
May 23, 2013, 10:58:42 AM
Well, all things being equal, I think we need about 800. John and Sumner think I probably need more.

Now, that would be running exactly as before, with no changes. I'm hoping aero, along with a full bellypan, will allow us to run with less HP, because I think we'll struggle to get 800 on the dyno, and have the engine survive, let alone get that much to the ground.

We had problems getting the HP to the ground, and really saw little gains after the low 160's.I think the car was floating in the rear, so I have high hopes for the bellypan. Last year, the bellypan only covered the front 60% of the car.

I have no idea if all of this will get us the results we need, but if we fall short of our goals, it sure won't be for lack of trying!
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

SteveM

#1748
May 23, 2013, 12:05:00 PM
It looks extremely mean! :cheers:

Steve
1/2 of the Rampage Brothers

Koncretekid

#1749
May 23, 2013, 03:51:45 PM
Buddy,
I think aero is going to achieve a lot more than you think.  I would be cautious with the increase in HP until you see how much you gain with the body changes.  There's always next year -- if you don't blow the motor.
Tom
We get too soon oldt, and too late schmart!
Life's uncertain - eat dessert first!

Pete1

#1750
May 23, 2013, 04:07:44 PM
Quote from: Koncretekid on May 23, 2013, 03:51:45 PM
Buddy,
I think aero is going to achieve a lot more than you think.  I would be cautious with the increase in HP until you see how much you gain with the body changes.  There's always next year -- if you don't blow the motor.
Tom

You guys talk like a bunch of dimwits...You build them to race, not to idle around and save it for next year.
If you build them right they don't blow.

SPARKY

#1751
May 23, 2013, 04:16:01 PM
Well whoop te do---I guess that explains my problem--let's see-- I dim witted--- for I blew up several--that means they were not RIGHT ---dumb me I thought they  didn't like 7900 for the last mile!!!!
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!

Pete1

#1752
May 23, 2013, 04:28:41 PM
Quote from: SPARKY on May 23, 2013, 04:16:01 PM
Well whoop te do---I guess that explains my problem--let's see-- I dim witted--- for I blew up several--that means they were not RIGHT ---dumb me I thought they  didn't like 7900 for the last mile!!!!

You can't go past the valve train for very long.

38flattie

#1753
May 23, 2013, 04:31:51 PM
Well,dim witted or not, I believe every engine will only withstand so many RPM's, and so much cylinder pressure. Then, BOOM!

I think Tom's advice of being cautious with our HP increases, and seeing how much more we may need on the salt, is a helluva lot better than just adding HP until we think we have enough, then BOOM! Kitty litter time!

Pete, you've been building engines and racing a long time-I'll bet you've blown up your share of engines, correct?

Sparky, I'm sure you're dim witted-we all must be! I really can't think of a better explanation for what we are all doing here! LMAO!
:cheers:
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

#1754
May 23, 2013, 04:35:28 PM
Quote from: Pete1 on May 23, 2013, 04:07:44 PM
Quote from: Koncretekid on May 23, 2013, 03:51:45 PM
Buddy,
I think aero is going to achieve a lot more than you think.  I would be cautious with the increase in HP until you see how much you gain with the body changes.  There's always next year -- if you don't blow the motor.
Tom

You guys talk like a bunch of dimwits...You build them to race, not to idle around and save it for next year.
If you build them right they don't blow.
LOL. Tell us how you really feel.
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