propane turbo build

[motoman426]

I am going to take my 300 mixer and it is going to be mounted on it's side that adapter goes to a 200 throttle body which is just a 2" bore 1barrell throttle body. I am builing a bracket that bolts to the two bolts on the side of the manifold toward the radiator. on the bracket on the bottom will be a 2" nipple welded to the bracket and I clamp a hose and bend tubing to get to the turbo inlet. For the discharge it comes off the turbo and just goes to the intake with a nipple to clamp the tubing to. It would have been a lot easier if I had a 200 mixer laying around but I like the way my 300 runs so I am using it. I actually bout another 300 to put back on my old throttle body to sell and I cant believe no one wants propane setup.

 

[motoman426]

here is the 300 adpter that I am running

 

[ntsqd]

Until a point, right? Isn't the rule of thumb to not exceed 1200*?

The placement doesn't dictate the EGT, it's the load and fueling that does. There is a consideration floating around out there in OE-land to build individual turbo, for each cylinder, into the cylinder head. They want as little wasted heat as possible. The next wave in OE turbos will be pulse-charging or what ever they decide to call it. Each exhaust pulse will drive the turbo better than allowing them to even out. I don't know why.

 

[motoman426]

Most of the time it is only turned up diesels that have to worry about the 1200 degree mark. The reason being that is the point that some aluminum starts melting and it could cause heating in the head and warp the head and blow a head gasket. In most cases a gas vehicle I do not think comes under that kind of load I may be wrong but I see very few gas vehicles that have a EGT gauge.

 

[motoman426]

I got bored tonight and decided to go to the shop and do a little work. I had two more pieces cut to match my exhaust housing, one being completly open to allow the waste gate to be able to dump into the exhaust and the other shut off other than the 2" hole for the exhaust. I took the three and sandwiched them together to make my down pipe and picked up a piece of mandrel bent pipe to make a nice 90 degree down pipe. I did not have room to put my exhaust facing backwards because of my orbitol valve placement so I am haveing to go through a little more trouble pluming my intake and everything in now but I hope to have all the pieced to it done and running by Monday evening

 

[CruisinFJ60]

Most of the time it is only turned up diesels that have to worry about the 1200 degree mark. The reason being that is the point that some aluminum starts melting and it could cause heating in the head and warp the head and blow a head gasket. In most cases a gas vehicle I do not think comes under that kind of load I may be wrong but I see very few gas vehicles that have a EGT gauge.

I had a GSX eclipse with a bunch of stuff done to it and it would temp up to about 1900 if I stayed on it from a exhaust housing being to small on the turbo and it creeping boost and heat on me.

My Dodge has some goodies too and currently my turbo is to small and I have seen it go over 2200*F ! ..... NOT good! but luckily all is well and a bigger turbo will solve that issue for me there.


Most gas engines that people build really should have an EGT gauge and I would bet is a likely problem to many failed engines and gaskets in the import / tuner world. but many times people use a turbo that is slightly bigger than their needs so it shouldnt be a problem.

finish yours i wanna see the end result!

 

[Slowerthanu]

I am going to take my 300 mixer and it is going to be mounted on it's side that adapter goes to a 200 throttle body which is just a 2" bore 1barrell throttle body. I am builing a bracket that bolts to the two bolts on the side of the manifold toward the radiator. on the bracket on the bottom will be a 2" nipple welded to the bracket and I clamp a hose and bend tubing to get to the turbo inlet. For the discharge it comes off the turbo and just goes to the intake with a nipple to clamp the tubing to. It would have been a lot easier if I had a 200 mixer laying around but I like the way my 300 runs so I am using it. I actually bout another 300 to put back on my old throttle body to sell and I cant believe no one wants propane setup.

I im'ed you about your setup, I am in the market and was considering got propane.

 

[Tinker]

Now if someone would come up with a closed-loop turbo TBI/propane setup we'd really have something!

 

[CruisinFJ60]

I love my propane

 

[ntsqd]

I don't know how big of a hole Mace's technique makes, but 3/4" NPT or 1" NPT would be about the size range desired with a 5/8" hose being the smallest drain hose that I would ever suggest. The hole needs to be above the normal oil level in the oil pan. This is particularly important if other constraints force a smaller drain hose selection so that pan vacuum generated by the PCV system will be applied to the turbo's bearing housing. Otherwise expect significant anti-rust oiling of the inside of the exhaust system.

Most of the time it is only turned up diesels that have to worry about the 1200 degree mark. The reason being that is the point that some aluminum starts melting and it could cause heating in the head and warp the head and blow a head gasket. In most cases a gas vehicle I do not think comes under that kind of load I may be wrong but I see very few gas vehicles that have a EGT gauge.

On my old VW Caddie diesel going over 1200*f for more than a very brief period of time meant that I shortly was going to be replacing one or more of the glow plugs. BT, DT.

 

[CruisinFJ60]

On my old VW Caddie diesel going over 1200*f for more than a very brief period of time meant that I shortly was going to be replacing one or more of the glow plugs. BT, DT.

Real trucks dont have glow plugs and fire off of compression alone!

 

[motoman426]

Now if someone would come up with a closed-loop turbo TBI/propane setup we'd really have something!

it would not be hard to do that do you want to blow through the carb or blow through the turbo. In fact I have a setup for a SBC that I just got from one of the guys in my club so that would take the place of the tbi so all that is left is to take off all the wiring harness and bolt the propane up

 

[ntsqd]

Now if someone would come up with a closed-loop turbo TBI/propane setup we'd really have something!

Not sure what you're asking for here. ECU control over the propane?

Real trucks dont have glow plugs and fire off of compression alone!

That makes you a Cummins fan, because every other make that I know of has glow plugs. You'll notice that I used the non-US name for the car, not the US name.

 

[Mace]

it would not be hard to do that do you want to blow through the carb or blow through the turbo. In fact I have a setup for a SBC that I just got from one of the guys in my club so that would take the place of the tbi so all that is left is to take off all the wiring harness and bolt the propane up

Make it draw through and have a TBI for the butterflies. And then have it switchable. Pretty easy actually.

 

[motoman426]

yeah that would be a good duel fuel setup but how would it work with the sensors and everything with shutting the ecm and everything down whenever you would switch over but to I dont know why you would really want to run both because TBI will work standing straight up I truly would not know the benefit of it

 

[motoman426]

I am having trouble finding cheap tubing to do the intake pipe work with I think I am going to buy a bunch of silicone elbows instead of trying to find 2" and 2.5" mandrel bent pipe

 

[Tinker]

Not sure what you're asking for here. ECU control over the propane?

Exactly! No idea how you'd meter the 'pane, but awesome with closed-loop EFI. Imagine a dual-fuel turbo EFI!

 

[motoman426]

you would not meter the propane the throttle body would only be there to use the butterlys to work the throttle. The mixer is what determines how much propane is injected not the TBI setup

 

[Tinker]

I guess I'm fantasizing about a computer-controlled turbo propane setup: the throttle body would be just that, but the MAF & O2 sensor(s) would dictate the propane flow & get close-to-perfect A/F ratios.

 

[Mace]

I guess I'm fantasizing about a computer-controlled turbo propane setup: the throttle body would be just that, but the MAF & O2 sensor(s) would dictate the propane flow & get close-to-perfect A/F ratios.

Autotronics used to make a solenoid controlled mixer for the model E vaporizer. I have one but didn't get it hooked up before I broke the front end on my cruiser.

That being said, a lot of the new Taxi's around here are dual fuel. Nat Gas and Gasoline.

They run a modified mixer and computer that goes along with the stock computer to switch back and forth.

Anything is possible.

Dual Fuel TBI Conversions

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