Drawn Through Turbo - Propane Injection

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01-22-2008, 06:31 PM

#21

0.0 BAR

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Join Date: Jan 2008

Posts: 14

Re: Drawn Through Turbo - Propane Injection

Quote:

Originally Posted by EGgyLShatch

the hy35's are a little harder to come by because they are newer, but the hx35's that came on the same trucks in the years earlier are very similar. From my understanding, the hy35 is slightly smaller and a lil bit more efficient, but the hx35 is not far off at all, and a very popular turbo around HMT. Different size exhaust sides came on different trucks depending on the year, whether it was auto or stick, etc so there is room to play, and there is at least one company (bullydog or bulldog?) that makes a different aftermarket exhaust side also.

heres one build with an hx35
https://www.homemadeturbo.com/forum/...?topic=83325.0

Joseph Davis is using one for is 500hp build if he ever finishes it, along with a lot of other people if you ask around

I found a HY35 on ebay going for about $150, so I can obtain one if I'm really set on it. For the exhaust side I wouldn't want to go larger that 3", preferably around 2.5" if I can. I'm thinking the Holset would probably be better for what I'm doing since my engine has the same rpm range as a diesel truck. MY '05 Dodge CTD 6 spd manual revs out at 5k and I will barely hit 3K, same goes with my FJ40 unless I'm really getting on it in the ice/snow wheeling. Plus the Holset has an internal waste gate already set up on it and a ton of boost.

For a blow off valve could I re-route the blow off valve to re-enter into the inlet side of the turbo? Since my fuel will be flowing through the turbo itself I do not think it is wise to be shooting raw propane into my engine compartment every time I get off the gas especially when I'm rock crawling. Constantly stopping and going, shifting gears, and wide band of rpm range.

01-22-2008, 09:35 PM

#22

EG-prince

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Join Date: Oct 2005

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Re: Drawn Through Turbo - Propane Injection

yes, you could reroute your blow off valve back into the pre turbo intake. Thats how they do it for mass air flow metered cars, because it would throw off their a/f ratio if the amount of air metered does not enter the engine. Sort of the same principle for you, except this way you'll be prevent small explosions under your hood

plus you're being more efficient with your fuel. On a side note, how does running the fj on propane compare cost wise to running gasoline? I'm not current with the current propane prices and have no idea how much you use/how fast it is used when powering a large engine

01-22-2008, 09:48 PM

#23

Smith-02

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Join Date: Apr 2006

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Re: Drawn Through Turbo - Propane Injection

fractionally more consumption, more power, but isn't as explosive. 108-112 octane out of the tank

01-23-2008, 12:15 PM

#24

0.0 BAR

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Join Date: Jan 2008

Posts: 14

Re: Drawn Through Turbo - Propane Injection

Quote:

Originally Posted by EGgyLShatch

Sweet that solves that problem.

Propane in Oregon costs around $2.25 a gallon. Propane is less efficient in consumption unless you build an engine to burn the 110 octane that it is rated at. Engines with 10:1 or 11:1 compression would run really well on propane, however my 2f is 7.8:1 so it doesn't burn it as efficiently. That is why I am wanting to do a turbo for my engine to up the compression. I could mill out the head but I like being different.

I use a 10 gallon fork lift tank and it will last me an entire day on it plus a little extra left over. However I am always crawling around so I'm not using mass quantities of fuel to get across a rock garden or trail.