well, my greddy egt is finally in after a couple days of digging through wire hell under the dash. very interesting to have; should have gotten one much sooner. ive learned a lot more about my car tonight.
in particular, how much propane injection really does help out...

all of my experimenting was done in 3rd (a little bit of screwing around in 4th as well) gear at or above 5000rpms. my car's fuel system is bone stock, sans the propane. manual boost controller tries to keep the big16g at 17psi, but lets it run up to 20.
so here we go. 11:30pm, 60 degrees or so, pretty close to sea level. very humid; a shower swept through earlier. there were clouds of fog hanging above the road i tested on.

lets see what happens.
third gear, starting out about 5000rpms, maybe 1/4 throttle. egt was between 750-800c. propane turned off by killswitch. exxon 93 octane in the tank. here we go; throttle pegged. boost spikes to 20, sinks to 17. egts pretty much sweep up to 900 in a couple seconds. fuel cut came quickly at 930 deg which was at about 6000rpms. i let off after that.
no, 440s and the stock pump cant handle that.

third gear, starting out about 5000rpms, maybe 1/4 throttle. egt was hovering pretty much 800c after the last run. propane on, 93 octane etc. lets see now. boost spikes to 20, although after a slight hesitation at 10 when the propane started injecting, then plateaus at 17. egt 850 at 6000rpm. fuel cut. its ok little ecu, i know what you dont. i let off to about 80% throttle to bypass that little pain in my ass and take it to 6500. the egt was just about to crest 900 when i let off.


so there it is. 17psi, stock fuel system = the suck. 17psi, propane = egts 100c cooler.
discuss!

alright how are you running the propane. i red it and seems like i am catching the second half of something.

Brendon

We also see about 80C drop in EGTs. We can max out at 950C with no propane at 22PSI but can't get above 850-870C trying our hardest with propane.

About the glitch when the propane first hits, you may want to move the turn on point higher. THe Hobbs is adjustable. If it is set factory still it is at 10psi. It can adjust from 7-14. You may want to turn it up to 14 since you don't have any problems at 14psi on pump gas. This will give the turbos time to spool and the engine will be more ready for the injection of more fuel where it may not be at lower PSI.

We are working on a dual setup where a small amount can be shot at say 7psi then the larger amount hits at 14. You would set it up so the small amount plus the larger amount would equal the total of what you are shooting now. But it would come on smoother since it's like Half first then the second half comes in later.

Where did you mount the nozzle to vent it in....how far from the throttle body...on my friends 02 Golf TDI his kit had to go before the turbo. Same situation here ?

Originally posted by TonyTSi
Where did you mount the nozzle to vent it in....how far from the throttle body...on my friends 02 Golf TDI his kit had to go before the turbo. Same situation here ?

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Diesel setups fair better pre turbo injection. Gas FI setups are better injected post turbo

Originally posted by TonyTSi
Where did you mount the nozzle to vent it in....how far from the throttle body...on my friends 02 Golf TDI his kit had to go before the turbo. Same situation here ?

Click to expand...

second post on this thread

about 4 inches from the tb

Do you have any direct comparisons to Water Injection? I've been looking at both, and water seems a little more convenient and simple. Or am I just over-dramatizing things?

-Jesse

propane is a fuel water is not! you can mix water and alcohol but it will never reach the octane rating of propane! water injection is more money. just some things to think about. My buddy is a huge water injection freak but I would still pick propane.

Water is free to fill up, Propane is not

Originally posted by larryd
Water is free to fill up, Propane is not

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Uhhh

$2.50 a month...I can swing that

2.50 is what it takes to fill it up? How often do you use it?

Originally posted by larryd
2.50 is what it takes to fill it up? How often do you use it?

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I run 22psi on the street on pump gas daily. No knock (this is a 3000 VR4) and the 5# tank last about a month give or take. That costs $2.50 or so to fill.

So you run it everyday then. I gotcha. Im going to look into propane or water injection soon.

anyone know how this would work out with a VPC, since the temp sensor is in the TB and the propane injected is very cold?

I have been water injection for a some time now. I still think propane is a better way. AQUAMIST is really the only way if you choose water injection in my view. Its nice but pricey, I would want the 2c kit and that would be about 550-600 and that is with my friends discount. Propane is 300.00 shipped plus a tank that is 35.00-40.00. That is cheap to me, I really also like the fact that it’s a fuel, and will boost your octane. I think I’m going to go with propane injection.

price on propane is almost negligable
i have a 12 pound like in my link, and i have not had to fill it once.

yes, propane does vaporize and gets very cold, but it does so out of the tank. water injection vaporizes in your intake which makes intake temps much much colder than what propane could do. water injection also basically steam cleans your internals, something propane does not.
propane, however, helps your fuel be completely detonated much better. since it is a gas, unlike the tiny droplets shot by fuel injectors, it fills the chamber more evenly than said droplets. since it does so, it ignites and wrings out every last bit of fuel in your combustion chamber. add the fact that propane at its lowest is 110 octane, and you get quite a boost in performance.

water injection is very comprable to propane injection. they can even work together to provide benefits unique to both. for me though, i just chose one, and im not regretting it.

The cooling effects of propane are really negligable. The benefits come from the octane boost.

from what im getting is you really cant go wrong with either one?

greyforestgst, keep in mind that adding propane is the same as fuel dumping. Richen the crap out of your fuel curve and your EGT will go down the same without propane. Propane just doesn't smoke like gasoline when running pig rich.

The real test is to get it on a dyno, do back to back runs.

Originally posted by JayHass
greyforestgst, keep in mind that adding propane is the same as fuel dumping. Richen the crap out of your fuel curve and your EGT will go down the same without propane. Propane just doesn't smoke like gasoline when running pig rich.

The real test is to get it on a dyno, do back to back runs.

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This has been said time and time again. To just add more fuel will not improve performance. That is why you have to back out your gasoline with an AFR then add Propne in the amount to get back to your normal O2s. Otherwise you are getting no performance.

I will be putting my propane on any weekend now.been sitting in my garage for what 8 months now.

DO IT FOCKER I want results

Originally posted by candela
DO IT FOCKER I want results

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HAHA!!! Me too. I'm scared to drill into my IC pipe myself.

Are you going to be injecting twice? Or just into the TB elbow? Come on, take it off and drill and tap that sucker. Ill even come down and help if you want (as long as I dont have work) =)... I really want to see results with this setup you got John. I hope it works out for you, especially since you had to take out yoru cams and such for emissions...hopefully youll be able to get some back!