Propane...new first hand information

[greyforestgst]

oh, and the tank is always open, regulator always hovering between 65 and 90psi, needle valve always open. the only leak i ever had was between the solenoid and the regulator valve, and i fixed that before the setup ever went in my car.

 

[RipperXX]

WOW, sure learned alot reading all 6 pages here...

now i know once i ever get my car fixed this is DEFENTLY going to be a mod i do.. seeing as if you can get rid of the hesitation it causes when first injected it seems to only have good effects and no cons...

 

[Sotarts]

Is anyone still subscribed/following this thread?

I haven't seen anyone mention this... How does propane injectino affect emissions results?

Is it wise to install and simultaneously use water injection AND propane injection?

Will water+propane setup affect emissions testing?

Will all this set-up co-exist with a blow-through installed GM MAFT safely w/out hurting the sensor?

(I don't think I should even have asked the last question.)

 

[Imp Pwr Online]

Don't know about emmisions but you could just lower the boost and turn off the propane at the testing site

As for water and propane there are Buick folk that have done just that with great results. I know since some are my customers.

 

[Sotarts]

Originally posted by Imp Pwr Online
Don't know about emmisions but you could just lower the boost and turn off the propane at the testing site

As for water and propane there are Buick folk that have done just that with great results. I know since some are my customers.

Turbo Buick Grand Nat. you mean? Is the set-up with blow-through MAS location or stock location? Location of the mass air flow sensor that is.

 

[Imp Pwr Online]

Yes, on GNs. Never got full info on the particular setups so I don't know if they are using blow thru or not.

 

[cummins4953]

Originally posted by RipperXX
WOW, sure learned alot reading all 6 pages here...

now i know once i ever get my car fixed this is DEFENTLY going to be a mod i do.. seeing as if you can get rid of the hesitation it causes when first injected it seems to only have good effects and no cons...

There is only one major con to propane....True the EGT's are down, but that is due to a much HOTTER burn inside the cylinder, thus reducing partially burned fuel, allowing faster exhausting and lower temps. The only danger(although severe if it occurs) is the potential of melting a piston or two. I have seen this first-hand if propane is injected without enough boost, at the wrong time, too long, etc. A guy with a motor like mine(massive iron pistons) siezed up his motor when he melted cylinders 3 and 6 and gouged the hell out of his cylinder walls.

So a word to the wise...do it carefully and make sure all the settings are correct then checking them again before you light it off.

Best Wishes, Hammer Down, Enjoy the Ride,
Will

 

[greyforestgst]

Originally posted by cummins4953


There is only one major con to propane....True the EGT's are down, but that is due to a much HOTTER burn inside the cylinder, thus reducing partially burned fuel, allowing faster exhausting and lower temps. The only danger(although severe if it occurs) is the potential of melting a piston or two. I have seen this first-hand if propane is injected without enough boost, at the wrong time, too long, etc. A guy with a motor like mine(massive iron pistons) siezed up his motor when he melted cylinders 3 and 6 and gouged the hell out of his cylinder walls.

So a word to the wise...do it carefully and make sure all the settings are correct then checking them again before you light it off.

Best Wishes, Hammer Down, Enjoy the Ride,
Will

makes sense i suppose, but heat is directly proportional to power, so if you're melting your pistons, you're one fast son of a bi***

anyways, as a followup to this thread, ive been injecting daily since the date i started this thread with no problems, and only one tank fill on my 10# pancake. as soon as my wannabe tmo chip arrives, im ready to update this thread on how to run 22psi from a big16g with 440's and a stock fuel pump.

 

[bottledbird68]

Originally posted by greyforestgst
as soon as my wannabe tmo chip arrives, im ready to update this thread on how to run 22psi from a big16g with 440's and a stock fuel pump.

Damn, I'm running 450's with a 14b, hardwired VR4 pump, and a MAF translator and I can't get away from fuel cut over 15 psi with the propane on?

 

[Imp Pwr Online]

Been running over a year on 20+psi on pump gas

JUST went to the dyno (AAM-Dynojet SAE Corrected) using 93 octane and propane and did 401AWHP 401AWTQ. On PUMP GAS

 

[greyforestgst]

Originally posted by bottledbird68
Damn, I'm running 450's with a 14b, hardwired VR4 pump, and a MAF translator and I can't get away from fuel cut over 15 psi with the propane on?

me either.

thats why i got the tmo chip, because it eliminates fuel cut.

 

[bottledbird68]

Originally posted by greyforestgst


me either.

thats why i got the tmo chip, because it eliminates fuel cut.

hmm, must look into this tmo chip a little more

 

[Imp Pwr Online]

You DSM peeps get all the good shit

 

[Sotarts]

Originally posted by Imp Pwr Online
You DSM peeps get all the good shit

So buy a DSM or two.. or three....

 

[toddinsb]

I have heard that a car running propane only has a different stoichiometric (sic) A/F ratio then a gasoline car. it's not 14:1 it's more like 15 or 16:1. I wonder how this would effect a mixed fuel car and if there is a good way to do some minor calibration on a wideband. Since it's mixed i would think it would be harder. Opiniouns please

 

[Imp Pwr Online]

Originally posted by toddinsb
I have heard that a car running propane only has a different stoichiometric (sic) A/F ratio then a gasoline car. it's not 14:1 it's more like 15 or 16:1. I wonder how this would effect a mixed fuel car and if there is a good way to do some minor calibration on a wideband. Since it's mixed i would think it would be harder. Opiniouns please

Stoich for Propane is 15.7:1

 

[toddinsb]

As to everyones question of why the lower egt with the propane this pdf may shed some light

http://www.ext.nodak.edu/extpubs/ageng/structu/ae1015a.pdf

it appears that propane has atleast 30,000 less BTU's/Gal then gasonline and this may be why you get a slightly lower EGT. The propane being injected doesn't burn as hot as the gas but it does burn more completely(gaseous form) and more controlled (higher octane).

 

[Frontwheeler]

I was just wondering if anyones has used propane at the track yet ? I would like to know if they have ran into problems with pre race safety instpections. My local track require a purge valve for N2O, is this necissary for propane ?

 

[arlopear]

good call .. i would like to know also ..... anyone ?

chris

 

[Imp Pwr Online]

NHRA Rule Book
SECTION 1A


E.T. SUPER PRO, PRO, SPORTSMAN

7.50 (*4.50) seconds or slower

DESIGNATIONS
E.T. SUPER PRO: 7.50 to 11.99 (*4.50-7.49)

E.T. PRO: 12.00 to 13.99 (*7.50-8.59)

E.T. SPORTSMAN: 14.00 or slower (*8.60 and slower)

- REQUIREMENTS AND SPECIFICATIONS -


1.3 FUEL

Gasoline, methanol, gasohol, diesel, natural gas and propane permitted. Nitromethane prohibited.

 

[greyforestgst]

i use it at the track all the time

 

[arlopear]

what are you thoughts on running propane with a 75 shot ? ....would somthing like that be safe ?

 

[Imp Pwr Online]

Originally posted by arlopear
what are you thoughts on running propane with a 75 shot ? ....would somthing like that be safe ?

Propane and Nitrous are AWESOME together. Vipers run a $3000 Propane/Nitrous kit with HUGE power gains.

 

[greyforestgst]

Originally posted by arlopear
what are you thoughts on running propane with a 75 shot ? ....would somthing like that be safe ?

itd be fun to have the nitrous solenoid activate off of the same line that the propane one does

easy as hell to tune, just crank up the propane to match the nitrous goin in.

 

[Antilles]

thats not a bad idea at all. it'd take some tuning, but it sounds like a poor mans wet kit.