LPG mixer removed - Less power !!! - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
Ford Forum Ford Forum

» Auto Insurance
» Featured Product
» Wheel & Tire Center

Go Back   Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > LPG Tech
Register Home Forum Active Topics Photo Gallery Auto Loans Garage Mark Forums Read Auto Escrow

FordForums.com is the premier Ford Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 10-01-2003, 01:13   #1 (permalink)
Soon to become: Jake_XR6
 
Join Date: Dec 2001
Location: Melbourne (eastern)
Posts: 515
confused LPG mixer removed - Less power !!!

I was going to post this a while back but forgot...

At a recent XR6T Dyno day in Bayswater, I got my VCT on the dyno
and it dynoed at 142 rwKw's. My car is on LPG, so for the second run I decided to play around and remove the LPG mixer from the intake pipe.
(I taped up the hole with tape nicely).

Now the funny part is that I expected more power, since the mixer
nearly halves the intake diameter of the pipe.

Anyway, I lost 4 kw's - amazing.

The guys at the dyno were scratching their heads, and one of them said that I should have reset the ECU to be fair to the test, since my A/F ratio was what was suffering. Anyway, my conclusion is that intake modifications ie. trying to get more air flow into the engine, seems to me to have little (if not the reverse) effect !!!

Any thoughts taximan and others....
__________________
Wheels: 17" Series 1 XR
Exhaust: VCT with no resonators & 3" mandrel from mufflers back, dump pipe
Pacemaker headers (Waste of money).
Air Intake: T-Series, K&N Filter.
Brakes: Calipers painted red, DBA slotted rotors & Lucas pads.
Windows: Tinted.
Gearstick: Shortened.
Fuel: Dual Fuel.
Dyno: 143 rwKw (Dynodynamics - shootout mode).
Heathcote: 15.87 @ 89.1 Mph.
BLACK XR6-VCT is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 10-01-2003, 01:17   #2 (permalink)
Registered User
 
EFFalcon's Avatar
 
Join Date: Oct 2002
Location: Mornington Peninsula
Age: 31
Posts: 7,517
Re: LPG mixer removed - Less power !!!

fwoah
thats weird.
surely most cars wouldn't do that!
__________________
1995 EF II Falcon GLi: Heritage Green, 4spd Auto, AUII 17" Rims, Custom BA Front Bar, Lowered, Gas Research LPG, Clear Indicators, JVC MP3 Headunit, Phoenix Gold 6.5" Splits, Coustic 481QE Amp, Clarion 12" sub, Leather Seats, Power Window Conversion, 3.45 LSD, Pacemaker Comp Extractors, 2.5" Exhaust, Mandrel Bent Intake, High Flow Filter, Wade 1004 110 cam.

In Progress: BA XR Side Skirts, BA XR Rear bar, BA Shifter Handle.


Want your EF on effalcon.com? Drop me a PM!
E-Series Club Stickers Here!

E-Series Moderator/Membership Officer/Webmaster/Cruise Official
EFFalcon is offline   Reply With Quote
Old 10-01-2003, 01:30   #3 (permalink)
Registered User
 
Join Date: Feb 2003
Location: Adelaide
Posts: 345
Re: LPG mixer removed - Less power !!!

Only thing I can think of is if you restict air down to 40mm at the gas mixer the air would have to be forced in harder eg.like a garden hose there is no pressure when you connect to tap until you fit an attachment like a spray nozzle then you have pressure so it should be the same for air, a large volume of air forced through a smaller opening should make the car go harder.
Hows that for a theory,am I wrong or right?
__________________
AU series1 Futura Duel Fuel,ceramic coated Pacemaker Headers,Hi-Flow cat.2.5in. exhaust,T-series snorkel,K&N panel filter,D.B.A.Slotted Rotors
taximan is offline   Reply With Quote
Old 10-01-2003, 17:24   #4 (permalink)
Soon to become: Jake_XR6
 
Join Date: Dec 2001
Location: Melbourne (eastern)
Posts: 515
Re: LPG mixer removed - Less power !!!

Quote:
Originally Posted by taximan
Only thing I can think of is if you restict air down to 40mm at the gas mixer the air would have to be forced in harder eg.like a garden hose there is no pressure when you connect to tap until you fit an attachment like a spray nozzle then you have pressure so it should be the same for air, a large volume of air forced through a smaller opening should make the car go harder.
Hows that for a theory,am I wrong or right?
Interesting theory....

The only way to prove this, would be to put something simmilar
on a non LPG vehicle's intake pipe and watch the dyno results.

I think that my results may have been different if I had reset the
ECU by leaving the battery disconnected for a while...
__________________
Wheels: 17" Series 1 XR
Exhaust: VCT with no resonators & 3" mandrel from mufflers back, dump pipe
Pacemaker headers (Waste of money).
Air Intake: T-Series, K&N Filter.
Brakes: Calipers painted red, DBA slotted rotors & Lucas pads.
Windows: Tinted.
Gearstick: Shortened.
Fuel: Dual Fuel.
Dyno: 143 rwKw (Dynodynamics - shootout mode).
Heathcote: 15.87 @ 89.1 Mph.
BLACK XR6-VCT is offline   Reply With Quote
Old 10-01-2003, 22:33   #5 (permalink)
300+rwkw DC LTD Member
 
LTDHO's Avatar
 
Join Date: Jul 2001
Location: Melbourne, Vic
Age: 40
Posts: 1,620
Re: LPG mixer removed - Less power !!!

The loss of power could be from a change in conditions in the day or the different running temp. Also the ECU would have been adjusting it's self for the air flow difference. It would need to re-adjust it's self.
__________________
LTDHO
Power by Herrod 185rwkw
Power by me 313.6rwkw
Stereo by ///Alpine
LTDHO is offline   Reply With Quote
Old 10-02-2003, 22:02   #6 (permalink)
Soon to become: Jake_XR6
 
Join Date: Dec 2001
Location: Melbourne (eastern)
Posts: 515
Re: LPG mixer removed - Less power !!!

On the dyno run with the gas mixer in the Air/Fuel ratio was around 11.5.

After removing the gas mixer, the Air/Fuel ratio dropped around to 11.0.

I am not sure what the optimal AFR is ???
__________________
Wheels: 17" Series 1 XR
Exhaust: VCT with no resonators & 3" mandrel from mufflers back, dump pipe
Pacemaker headers (Waste of money).
Air Intake: T-Series, K&N Filter.
Brakes: Calipers painted red, DBA slotted rotors & Lucas pads.
Windows: Tinted.
Gearstick: Shortened.
Fuel: Dual Fuel.
Dyno: 143 rwKw (Dynodynamics - shootout mode).
Heathcote: 15.87 @ 89.1 Mph.
BLACK XR6-VCT is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > LPG Tech



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
2003 Ford F-350 Power Stroke Stacy94PGT Ford Worldwide News 1 11-04-2002 15:31
AUSTRALIA: Independent 42-volt auxiliary power unit for vehicles promised for Detroit RPO83 Ford Worldwide News 0 10-17-2002 08:16
Ford F-series Super Duty Gives Customers Power And Style RPO83 Ford Worldwide News 0 10-09-2002 01:02
Ballard Power Systems and Ford Power Products Unveil the World's First Hydrogen Gener Stacy94PGT Ford Worldwide News 0 08-07-2002 11:41
Super Duty's Improved Power Stroke Diesel Produces Best-in-class Torque LunaticSVT Diesel Tech 0 03-22-2002 22:31

Powered by vBadvanced CMPS v3.2.2

All times are GMT -7. The time now is 04:31.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.6.0
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.