Pro Mod Wad:

I was wondering if it's possible to plumb in propane instead of running gasoline off of my racing fuel pump, because I've already got two 750 cfm 4-barrels being fed off of the fuel system. I figure maybe I'd need to use a nitrous solenoid for the propane feed and the propane tank regulator, but I suppose the questions are how much pressure to set the propane to, and what jet sizes to use on the nitrous and propane fuel for a dual system with plates under both carbs and individual runner Fogger nozzles to give a total (with both systems engaged) of 200-300 HP boost.

It's running on a 350 Chevy with 13-1 compression at 600 lift; tunnel ram intake, 290 duration cam; 513 gears. I don't know if you need to know all that stuff or not.

Any knowledge or suggestions would be appreciated.

One Mean T-Bucket Dragster

T-Bucket:

Here is the scoop of propane/nitrous. It does work, but there are some issues on how to use it. Propane has much octane and many BTU's - much more than gasoline - so it can produce big power in small doses with nitrous.

One problem is that since you need to use the propane in its liquid form, it can't be regulated as it would in standard automotive use. This means it will be introduced into the engine at around 200 lbs. pressure, which means fuel jets would be very small compared to a normal gasoline system.

The other issue is the propane tank itself, which is usually very large, clumsy and HEAVY. In a weight conscious car that can be a problem.

But, if you choose to do it, yes, you can use a nitrous solenoid to control propane flow and inject it into the engine using a dual plate system. I don't think you can use Foggers also, as the jetting map would have to be so small you may not be able to get sizes that you need for both systems.

We have had racers stack plates on top of each other and use two different power levels in the plates. This seems to work well. Remember that the propane will be introduced at high pressure, sot the distribution in the manifold will be more even that with low pressure gasoline.

I have worked with motorcycle guys who used Burnzomatic torch propane bottles for their source on the bike and that worked well, but on a race car I don't think they would last long unless you could gang some up on a small manifold device.

If you need more info on this or some help with plumbing questions, call the Tech Dept. at NOS and we can guide you.

Thanks for a great questions.

Pro Mod Wady

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