# Whats under my carb
**URL:** http://forum.driveonwood.com/t/whats-under-my-carb/438
**Category:** Fab Shop
**Created:** [August 13, 2012, 1:53am UTC](http://forum.driveonwood.com/t/whats-under-my-carb/438 "2012-08-13T01:53:42Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@kd0agb](http://forum.driveonwood.com/u/kd0agb)
#### Post date: [August 13, 2012, 1:53am UTC](http://forum.driveonwood.com/t/whats-under-my-carb/438/1 "2012-08-13T01:53:42Z")
The video is pretty dark but it shows the duel blast gates that I use to control the wood gas and air on my engine.
[ ](https://www.youtube.com/watch?v=NjYecX7tMro)
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### Author:  [@humble1a](http://forum.driveonwood.com/u/humble1a)
#### Post date: [August 13, 2012, 10:25am UTC](http://forum.driveonwood.com/t/whats-under-my-carb/438/2 "2012-08-13T10:25:12Z")
Dave,
This is very good, gates are very smooth. I can’t really see the details in the video, could you take a few still pics and post them? Thanks.
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### Author:  [@Dustin](http://forum.driveonwood.com/u/Dustin)
#### Post date: [August 13, 2012, 11:27am UTC](http://forum.driveonwood.com/t/whats-under-my-carb/438/3 "2012-08-13T11:27:00Z")
I really like this idea, actually I had purchased a few of blast gates to do just what you showed, it’s nice to know that it works so well.
One question. Would there be any reason why someone would want to have the woodgas throttle (blast gate valve) and air intake valve (other blast gate valve) independent from one another i.e not linked to one another through a linkage which maintains a constant 1:1 ratio.
I know it complicates things a little more but thought in certain circumstances it might be beneficial to be able to lean or richen the fuel mixture i.e starting the vehicle on woodgas, or using gasoline to get up hills ect. But I don’t know.
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### Author:  [@humble1a](http://forum.driveonwood.com/u/humble1a)
#### Post date: [August 13, 2012, 7:10pm UTC](http://forum.driveonwood.com/t/whats-under-my-carb/438/4 "2012-08-13T19:10:49Z")
My air/fuel mixing valve is separate from my throttle on my truck. Load changes and driving changes require small adjustments. Time will tell on this gate setup of Dave’s. Will be interesting to see how it works when a good load is put on that engine. The setup is a good start.
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### Author:  [@kd0agb](http://forum.driveonwood.com/u/kd0agb)
#### Post date: [August 13, 2012, 10:16pm UTC](http://forum.driveonwood.com/t/whats-under-my-carb/438/5 "2012-08-13T22:16:03Z")
Here is a better video of my setup. The gates can be adjusted separate to allow for gas quality and tuning but not on the fly. My intake air comes in on the left side and is pulled back through the fan when the fan is shut off. I would think that a speed control on the fan could adjust the fuel air mix
[ ](https://www.youtube.com/watch?v=cKte6txTzj0)
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### Author:  [@kd0agb](http://forum.driveonwood.com/u/kd0agb)
#### Post date: [August 14, 2012, 1:47am UTC](http://forum.driveonwood.com/t/whats-under-my-carb/438/6 "2012-08-14T01:47:49Z")
If fine tuning is required this set should work with my setup
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### Author:  [@Dutch\_John](http://forum.driveonwood.com/u/Dutch_John)
#### Post date: [August 14, 2012, 6:02am UTC](http://forum.driveonwood.com/t/whats-under-my-carb/438/7 "2012-08-14T06:02:42Z")
Dave,
Please consider this as a well meant warning, because I really like your technical achievement. But how well are you going to filter the gas? Even very little soot will cause the plates to stick. It will be an exciting, but undesired experience when the gaspedal remains on the floor…
Regards,
DJ
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### Author:  [@kd0agb](http://forum.driveonwood.com/u/kd0agb)
#### Post date: [August 14, 2012, 2:00pm UTC](http://forum.driveonwood.com/t/whats-under-my-carb/438/8 "2012-08-14T14:00:09Z")
Thanks DJ
Your point is well made. perhaps a emergency shut down valve ,like the old Detroit 6- 71’s have, is in order here.