Amazon: LPG Volvo 122 b23et turbo problem

[Gavinh]

So I have not long just put up a thread regarding this car, as the title suggest I have a 122 turbo LPG.
I have considered going back to petrol due to ease and I have alot more knowledge about petrol and diesel.
The car has a real flat spot when under load below 3k rpm if I want to accelerate quickly, it just looses all power and sometimes back fires.
Also I would like some boot space back, as there is a 80L? Tank in it which is huge.
The car is using a megajolt ignition ecu, TD04-T16 turbo, vx3 cam and adjustable cam gear.
The lpg side is, gas Reaserch converter (B2) and mixer GRA440.
I have been getting part to convert it back to petrol, but on the other hand if I can get it to run on gas well, it would save me the headache of converting it back.
So with the symptoms of it bogging down, could it possable be the turbo is to big and I'm getting to much air to fuel mix?

Any input weather good or bad will be appriciated.

Cheers

Gavin

[arcturus]

Are you able to or have tried disconnecting turbo?

[Gavinh]

Actually never thought of that, could possably disconnect the intake from the turbo so it's not forced Induction just N/A and leave the turbo connected to the exhaust.

Cheers

[arcturus]

Also check vac' advance if you have one.

[Gavinh]

Originally Posted by arcturus

Also check vav' advance if you have one.

Sorry you lost me there 'vav', talking about timing?

[arcturus]

Originally Posted by Gavinh

Sorry you lost me there 'vav', talking about timing?

Typo, should read vac' vacuum. Do you still us a a dizy and carb's or fuel injection?

[skidje]

Replace the VX3 with a A, B or D.
Are you using a MBC? What kind of LPG injection?

[mocambique-amazone]

Originally Posted by skidje

Replace the VX3 with a A, B or D.
Are you using a MBC? What kind of LPG injection?

VX3 is the last of all cams I would use in this configuration.
The engine is with a carb ?
A blow through carb?
And maximum turbo pressure is????
I can't see a LPG injection. Will( better: tries) this engine to run on lpg with a venturi system?

Good night, Kay

[Gavinh]

The system is distributeless, running megajolt edis from a ford. The car ticks over very smooth and drives great under normal condition if I'm not hammering it.
The car has carburettors and os a blow through system mounted on the inlet manifold.

[classicswede]

VX3 would not be a cam of choice for making drivable power but not likely your problem here.

More photo's would help identify your issue but I would say the main thing is the fact you are running blow through. To go blow through the vapouriser has to be balaced to manifold pressure and getting the balance right is VERY hard and often will not work in all conditions

Suck through will give much more reliable fuel mixture but if you do have a backfire it will be much bigger