RPI Power Plenum

Any posts regarding LPG to be posted here ONLY please.

Moderator: phpBB2 - Administrators

Post Reply
Richard P6
Getting There
Getting There
Posts: 207
Joined: Sat Feb 14, 2009 11:04 pm
Location: Yorkshire

RPI Power Plenum

Post by Richard P6 » Thu Jan 05, 2012 2:52 pm

I have been looking at this Power Plenum from RPI which is supposed to give you fuel injected performance from a 4 barrel, even on LPG.

Anyone tried one?

Richard



sidecar
Top Dog
Top Dog
Posts: 2395
Joined: Sun Feb 04, 2007 9:52 pm

Post by sidecar » Thu Jan 05, 2012 6:09 pm

I'd take anything that RPI state with a huge sack of salt! For starters they can't even jet the Eddy 500 carb properly, their Ebay blurb states that the carb is not "jet sensitive" yet I've found that you can set the cruise up with a jet and rod combo and its fine then go one thousandth of an inch smaller with the size of the aperture that the fuel flows through and the car is un-driveable....I'd call that quite sensitive! This setup looks better... http://www.ramairbox.com/
Last edited by sidecar on Fri Jan 06, 2012 11:13 am, edited 1 time in total.

Richard P6
Getting There
Getting There
Posts: 207
Joined: Sat Feb 14, 2009 11:04 pm
Location: Yorkshire

Post by Richard P6 » Fri Jan 06, 2012 9:36 am

sidecar wrote:I'd take anything that RPI state with a huge sack of salt!
Me too, that's why I was asking :shock:
sidecar wrote:For starters they can't even jet the Eddy 500 carb properly, their Ebay blurb states that the carb is not "jet sensitive" yet I've found that you can set the cruise up with a jet and rod combo and its fine then go one thousandth of an inch smaller with the size of the aperture that the fuel flows though and the car is un-driveable....I'd call that quite sensitive!

This setup looks better... http://www.ramairbox.com/
What's this set up like on LPG?

Richard

sidecar
Top Dog
Top Dog
Posts: 2395
Joined: Sun Feb 04, 2007 9:52 pm

Post by sidecar » Fri Jan 06, 2012 11:12 am

Richard P6 wrote:
What's this set up like on LPG?

Richard
Dunno mate, I've never used the stuff! I thought that the carb played no part in running the engine once it was burning LPG though? I though it was a 'mixer' that controlled the engine.

sidecar
Top Dog
Top Dog
Posts: 2395
Joined: Sun Feb 04, 2007 9:52 pm

Post by sidecar » Fri Jan 06, 2012 11:14 am

Double post

sidecar
Top Dog
Top Dog
Posts: 2395
Joined: Sun Feb 04, 2007 9:52 pm

Post by sidecar » Fri Jan 06, 2012 11:15 am

Cack, another!

Richard P6
Getting There
Getting There
Posts: 207
Joined: Sat Feb 14, 2009 11:04 pm
Location: Yorkshire

Post by Richard P6 » Fri Jan 06, 2012 3:43 pm

sidecar wrote:Cack, another!
You can say that again :shock:

Quagmire
Knows His Stuff
Knows His Stuff
Posts: 377
Joined: Wed Jul 30, 2008 9:42 am
Location: Hook, UK

Post by Quagmire » Sat Jan 07, 2012 1:47 pm

Pete you are spot on in what you say about the carb not having any part in determining the mixture on an LPG system.

Once running on LPG fed from the mixer ring the only bit of the carb doing anything is the throttle butterfly. Mixture control is performed by the vapouriser and power/economy valve on the gas side of the LPG pipework.
1974 Rover 3500s
1984 3.5 90
1959 2.25 series 2

Post Reply

Return to “LPG Section”