Projects Dodge This - 1939 Dodge Southeast Gasser Build

Trying out this cell phone pic upload

 

The "Outlaws" running with you guys today?

 

There were quite a few Harley's here not sure what club.

It was rained out so today at 1pm gonna try again

 

Well, how did it go?!!!! Got any pics? I wasn't able to go, hope everyone had a good time.

 

^^^^^^^^^^^^X2

 

That was a loooooong trip. 8 1/2 hours each way. It rained after the first qualifying runs and then a disco ball dance party ensued in the pits about 9pm and I went to bed at midnight. Thank God someone only brought 7 quarts of shine

We all rose rusty and in the morning and made another qualifying round after we all stood and said the Pledge of Allegiance - Sonny Burr had a prayer and then everyone stood for the National Anthem. Why should I even need to say that.

Then we hit the track hard! The Pale Rider was not hooking and what's the point of lane choice if you are gonna pick and choose all the way down the track!

My short stack experiment went wrong wrong wrong. The car was real choppy and really didn't want to wheelie and went 1/2 second slower for both passes. Can't run an O2 sensor at the race so only can speculate. With two races left, the 12" stacks are going back on. No more messing until we can dyno it and see what the stacks are doing. My thinking right now is longer stacks!

Snagged a few pics off F/B

 

I'm guessing you didn't bring the 12" stacks along so you could change back? Bummer

 

No they are a press fit and it takes a lot of effort and a vice to get the tubes in and out of the bases. I'm going to see what Alky Digger is getting for the bases and then, maybe try swapping them at a track when I can mess with the pills and have an O2 sensor.

 

It would take some work to fabricate, too much for during season, but consider for a future project very short straight stacks with a flange with tapped screw holes on the outside where you could attach stacks of any length with matcing flanges with clear holes for the screws to lower stack flange.
Each set would need flanges unless you could figger a way to separate from the upper stack and fasten them to another set of different length.
Track altitude is gonna have some bearing on the air/fuel ratio as well as ambient temp.

 

Been having trouble with a loose radiator cap for a while. We zip tied a rag over it but there was a drop or two. The track crew was running a tighter ship than Chattanooga so - you're outta here! When it started raining I caught a ride to Advanced Auto Parts and got a new cap.

 

Red rag?

 

Speak to a metal spinning company they would be able to make what your after

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That's all I ever use - just the right texture

I talked to Gene Adams and Nick Smithberg about the stack size and its just math. The 12" stacks will not allow full power over 6500 RPM. The engine does rev to 8000 with them but there is going to be more power with say 6" - so Ric mentioned using rubber tubing and big hose clamps and sliding the stacks to change the length to find the best size. I'm hoping to talk Johnny Thomas into making a Hemi adapter for his dyno this winter and work all this out on an engine stand.

 

Here is a graph that is pretty close to what is needed to catch the 3rd order harmonic (most common) for runner length. There are many harmonic waves to catch, just depends on what you are trying to achieve. You need to measure intake port centerline length, runner centerline length in the manifold, intake gasket thickness, and stack length if you are running an injector. Total tract length is what is in the chart above. There are actual calculations to determine exact length needed or RPM desired. Crunching the numbers this way gives you an expectation for dyno testing and you can fine tune from there. If it doesn't end up within a few 100 RPM something else is the cause and time to see what is affecting it. We can all thank the Chrysler Engineers "Ram Chargers" for figuring this out.

When it comes to Wave Tuning the big picture needs to be realized. The header is just as important, if not more since it can manipulate the power curve pretty dramatically with minor changes. When we did Engine Masters I learned how critical header design was and how it manipulates power. It affects alot more than you think and is probably the most overlooked item. All about the details to make them perform at another level!

 

Interesting graph but how does it a count for the runner inlet diameter and radius at the mouth inlet ?

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That graph is just a quick reference to get you in the ballpark in most cases. There are actual calculations and many things to consider for a more exact number.

For bellmouths shape there is certainly a reason why you see them shaped the way they are. Professor Blair spent time figuring what was optimal. You can read about that info here - (top search, open the PDF file)
https://www.google.com/search?q=pro...q=profe&aqs=chrome.1.69i57j35i39j0l2.2636j0j4

For desired area needed I use a Program called Pipemax that Larry Meaux created. It's also very useful for header design for size needed and lengths. There is more to header design than what the program gets into but it will get you 85% there. It also calculates alot more and for what it costs it's a very useful tool for engine design. There are many computer simulation programs that I have used over the years but ultimately past experience and looking at the overall picture mixed with a little gut feeling is what makes the final call for my part.

 

That old thing called experience goes along way in my book thanks for great reply

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Yep those are real 6 pin Halibrands running on Ford 9" axles with 6 lugs.

 

Went to a real old drag strip in Alabama Saturday and almost didn't find enough gas to get back home!

Car never got 2 feet from the trailer though - head gasket time

 

Drain pan looks like you been milking a cow. Ain't racin fun..

 

Well what can you say You Had a good summer. That's racing for sure

 

Yep back on the milk again. Hope it doesn't hurt it because its not the first time.

Had an awesome summer! Just need to get this sorted out for 2 more races and then probably re-ring it over the winter.

 

This was from the screw it sucked up in April

 

Note to self Make race car easy to work on

 

Here's the leak - those damn SCE gaskets with the silicone bead

 

What did the pistons look like with the carbon on them if any?

 

what did the head look like over that piston?

 

OUCH. And now we know we're it went!!

 

clark gasket in minnesota makes good copper gaskets. i have found if the engine is running water set the o-ring about 8-9 thousandths off the deck. any more and water leaks out. also use a very thin layer of silicone over the entire deck surface and head surface. don't use so much that the steam holes get clogged up. this has worked for me for years.