Mud-club

Vehicle & Technical => Discovery => Topic started by: barnhill4x4 on February 11, 2007, 19:18:38

Title: LPg and snorkle?
Post by: barnhill4x4 on February 11, 2007, 19:18:38

I have recently fitted a mantec snorkle to me 3.5efi with drawthough single point LPG.
  I have faced the intake backwards to avoid Ram Air, I have no running probs at all with it fitted apart from it using about 30% more gas!
  If I take the front of the airbox off effectivley bypassing the snorkle my fuel consumption is back to norm.
   Is this normal?

Title: LPg and snorkle?
Post by: Ralph on February 11, 2007, 21:09:58

Try facing the top fowards. Rear facing could be causing a vacuum in the snorkle on overrun effectivly sucking gas back up the snorkle.
If the ram air effect causes problems you will have to use a round top.

Title: LPg and snorkle?
Post by: solihull-mick on February 11, 2007, 21:25:55

The problem your having is the airflow or ram effect down the snorkle will open you air flow senser thus fooding the engine, as the last thread suggests try facing the snorkle rearwards, or out of the airflow somehow

Title: LPg and snorkle?
Post by: Range Rover Blues on February 11, 2007, 21:32:05

Forget all this ram air nonsense, the physical length of the air intake is causing a slightly higher vacuum at the LPG collar so it's running rich.  All I do is remove the front plate of the filter if I'd not expecting to go swimming and it runs a treat.

Title: LPg and snorkle?
Post by: solihull-mick on February 11, 2007, 21:36:29

Quote from: "Range Rover Blues"

Forget all this ram air nonsense, the physical length of the air intake is causing a slightly higher vacuum at the LPG collar so it's running rich.  All I do is remove the front plate of the filter if I'd not expecting to go swimming and it runs a treat.

As  matter of fact i can say by moving the snorkle rearfacing, a mates disco runs fine, forward facing and the airflow meter resistance goes mad when you reach 50mph or so, But im sure we are all adults on so thats the last from me on this subject, belive what you will :lol:

Title: LPg and snorkle?
Post by: Ralph on February 11, 2007, 22:03:53

Quote from: "Range Rover Blues"

Forget all this ram air nonsense, the physical length of the air intake is causing a slightly higher vacuum at the LPG collar so it's running rich.  All I do is remove the front plate of the filter if I'd not expecting to go swimming and it runs a treat.

No nonsense, actual fact.




There are a lot of fools about

Title: LPg and snorkle?
Post by: Range Rover Blues on February 11, 2007, 22:05:19

Oh, right then :roll:

Title: LPg and snorkle?
Post by: barnhill4x4 on February 11, 2007, 23:23:26

The snorkle is facing back, I put it on like that to stop ram air as I realised this was bad for LPG, I suppose the vacuum theory makes sence. So in effect, when the engine isn't burning the fuel it is being sucked the wrong way out of the intake?
  I think I will just do as RRB suggests and keep the cover off unless I need it.
  I never would have though it would make that much difference to the consumption but now I understand how. Thanks

Title: LPg and snorkle?
Post by: jjsaul on February 15, 2007, 21:36:08

at least its cleared up...i will be running lpg/snorkel soon  :lol: