Blown Gas H.T.O. running in the 7's

Fred.Rowe

Fred.Rowe

Knifemaker / Craftsman / Service Provider
Joined
May 2, 2004
Messages
6,848
The forced air natural gas, forge/heat treat oven, I built last year, will hold

the set temperature within 7 or 8 degrees when I run it above 1000 f. Set

at 1300 it will travel from 1293 to 1301 degrees after it stabilizes.

How does this compare to electric ovens or salt pots? I am not familiar with

either.

agm.jpg
 
I thought you meant Blown gas GTO running in the 7's. I was gonna say, damn that's a fast car! lol

Nice setup. I wish I could help, but I know nothing about it.
 
Dave Bowen said:
I thought you meant Blown gas GTO running in the 7's. I was gonna say, damn that's a fast car! lol

Nice setup. I wish I could help, but I know nothing about it.
Click to expand...

I must admit; I new this would snare some muscle car fans. I am one.

When you think about it, there is not that much difference between a good blown forge and a nice street machine. One thing is, I can afford the forge.

Fred
 
Dave Bowen said:
I thought you meant Blown gas GTO running in the 7's. I was gonna say, damn that's a fast car! lol

Nice setup. I wish I could help, but I know nothing about it.
Click to expand...

As in the Pontiac GTO? theres a couple of Holden Monaros (Parent car to the Pontiac GTOs) that I've heard of running mid to high 6's with bored, stroked, blown and NOSed LS1s in aussie

very nice cars, But i'd rather have a Senator or Clubsport over a Monaro.

theres a very nice remote turbo setup for the GTO however if you have a pontiac and want to rev it out a bit :D

and to keep on topic, I bet theres a few bits in the car you could make knives out of :P
 
Fred,
I can't respond with regards to salt pots but I DO know that if you are getting only a 7 degree swing in temp and it is REPEATABLE, you really can't do much better than that with anything else. That is pretty dead on. In the old days, before we had digital readouts, you never would have noticed.

I have seen where temperature is controlled is within +/- 1 degree but you should see the expensive setup and control scheme needed to do that! This is in industries such as pharmaceuticals where it is that critical.

What you have is nothing to sneeze at. That is darn good control.

Craig
 
C L Wilkins said:
Fred,
I can't respond with regards to salt pots but I DO know that if you are getting only a 7 degree swing in temp and it is REPEATABLE, you really can't do much better than that with anything else. That is pretty dead on. In the old days, before we had digital readouts, you never would have noticed.

I have seen where temperature is controlled is within +/- 1 degree but you should see the expensive setup and control scheme needed to do that! This is in industries such as pharmaceuticals where it is that critical.

What you have is nothing to sneeze at. That is darn good control.

Craig
Click to expand...

Hi Graig,

This oven was built from my original forge. It had been retired after getting a whisper lowboy.
I used the parts that were available to me to construct this oven, so the results were not planned, more like, hoped for.:confused:
I don't claim any knowledge or skill in this area.
Some times, blind luck, will suffice.
I believe the reason it holds the temps so close, is that the forge is enclosed and the heat has no were to escape. The working chamber is a 20" by 4" tube, accessed through the top of the forge. The "k" thermocouple is mounted inside this tube.
The little Watlow digital controller is amazing. After the oven runs for 15 minutes, the controller has learned how to meter the gas and maintain the set temp.

I'm heading for Bloomington this Friday, Fred
 
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