Outer Limits 4x4 Board

hey all
well thought id ask it here seems there are plenty of smart people on here.
now my vehicle is a gq with a td42 with an inline ip and pneumatic governor.
now reasn ive asked it here and not in the nissan section is bugger all patrols came out with inline pumps but i know the 2h toyotas are pneumatically governed and possibly others so thought it would be a good general question not make dependant.
anyway basically with the above vehicle i have just put a turbo on it. and now it goes unreal but i cannot hold a constant speed. so im always either on or off the gas pedal trying to keep to say 70kms an hour. and even off road you try do say 2000rpm up a track and the thing almost shoots to 4500rpm in a heartbeat. just makes it a tad hard to drive at a consistant speed.
the current setup has the one pneumatic line going from the throttle body to pump and the other plumbed in before the turbo. is this the correct way to have it plumbed in?
or should i have both lines plumbed in after the turbo, which i would possibly think would allow the pressure difference to be less making it smoother to drive.
as at the moment its a hoot to drive but im thinking if i had to drive for say 1000kms or so id be awefully fatigued just from having to constantly work the throttle pedal to keep the plods happy. and i must sound like a complete tool driving along being on and off boost every couple of seconds.
so im asking all pneumatically governed turbo diesel owners for their ideas on how to rectify this issue. i do eventually plan to put a ve pump on it but finding a good pump and all the bits i need is not easy and even harder to fund atm.
cheers all.

Both pressure/governor lines should be on the same side of the turbo, one each side of the butterfly. Some 2h kits relocated the butterfly before the turbo - apparently for more prescice fuel control (and probably because they leak and piss oil when pressurized). Mine works well on the pressure side.
Out of curiosity what type of pump does the td42 run? Brand/model#?

dogbreath_48 wrote:Both pressure/governor lines should be on the same side of the turbo, one each side of the butterfly. Some 2h kits relocated the butterfly before the turbo - apparently for more prescice fuel control (and probably because they leak and piss oil when pressurized). Mine works well on the pressure side.
Out of curiosity what type of pump does the td42 run? Brand/model#?

beautiful. exactly what i was thinking. well il have a play tomoz and hopefully will fix my issues. worst thing is i bet it wont go as well now haha.
and for the record the engine is out of an import patrol that uses the inline pump. cannot of the top of my head tell you model numbers but i do know its a diesel kiki pump.

My (limited) understanding is that the pump has to measure pressure difference across the butterfly - using the pressure difference across the turbo AND butterfly would be throwing it right out of whack (and possibly overstressing the diaphragm). The pump should still be delivering the same max fuel output so should go just as well I would think. Let ke know what you find out

And make sure you clamp the hoses. Several toyota owners have fitted turbos, popped off hoses and had their engines rev to the moon.

well had a play today and yep just had to move the breather hose to the other side of turbo and all is swell. it doesnt go anywhere near as good as what it did but with some tweaking im sure similar figures would be achievable. it dont think it would see full fuel as easily setup properly as before there was nothing stopping the diaphragm from just going straight to full. now it has to fight boost pressure. but its good now egts are more user friendly as well. before i was seeing 700c preturbo just going up the highway cruising. and thats just on and off the throttle trying to keep below the speed limit.
ive just gotta figure out how to add fuel to these pumps to up it a bit and might even get a boost gauge and have a bit of a play with that and see what she is capable of.
oh and as for the revving part. you betchya. i went for a quick play yesterday and it was nothing to see 4500 rpm in NO time. even on the road it tended to rev right out real easy.
kind of a shame really as it was fun to drive.
and yes all hoses are clamped but i need to swap then to some turbo spec hose just to keep my mind at ease. dunno how long rad overflow hose will last under boost pressure.