2l turbo install problems

[new2zukes]

well i have recently put a turbo on my 2l petrol motor which has been converted to lpg all has been done i have used a terrano turbo and i have used radiator hose to connect the turbo (pressure side) to the inlet manifold and my problem is that the hose is squashing when the motor is running almost to the stage where there doesn't seem to be much air going threw (motor stays running as usual. when i manually open the wastegate and rev the motor the hose goes back to the normal shape. so my question is, is the radiator hose too soft for this application? i would go and take some pic of it and show you but its over at a m8s workshop.
any help would be much appreciated thanks.

martin

[meatc]

That doesn't sound right Sounds like an air restriction in the turbo or pre turbo, are you sure you didn't leave a rag in it somewhere? What happens when you rev it?

Also the radiator hose won't last. See http://www.dsrturbo.com (they are in Paihia) for silicone elbows and use a bit of exhaust tube in between.

[new2zukes]

ah ok thank, yes could well be a restriction as the lpg mixer doesnt seem to have much of a gap for the air to flow threw would putting another pipe that bypasses the mixer and goes in before the throttle body aid in getting enough air flow so it would be dragging air in from the mixer and the bypass pipe.

[meatc]

HOw have you got it set up? Is it turbo, mixer, radiator hose, intake or mixer, turbo, radiator hose, intake? If the mixer is after the turbo that shouldnt cause it, if the mixer is before the turbo that would be it, and I'm not sure you would want a lpg/air mix going through the very hot turbo, turbo should be blowing into the mixer

[new2zukes]

mixer turbo r hose inlet the mixer is an impco and i dont think it will handle being under pressure. yes i understand what you are saying about lpg and air threw a turbo but the research i have done threw sites like gasresearch.co.au says that a draw threw setup is ok as long as the intake is short and there is no intercooler. there are alot of people who have done draw threw methods with lpg but there are also some that say it shouldnt be done. i have some tube and some bends that i can make up the space that the radiator hose is in.

[new2zukes]

well i have struck a few other problems with my install, i have a blown head gasket and oil in the intake which i know how to fix but its a pain. better still found out the alloy radiator i have been using is stuffed, it has somehow managed to get enough pressure threw it to expand the core tubes so they are touching each other and there is no air flowing threw it. so the truck will spend a few more weeks in the shed will post some pics of the manifold and setup tomorrow.

[meatc]

Stink

do you think the radiator may have been damaged by the head gasket been blown for a while? would have thought cap would have let it bleed off.? Hope you can get it sorted

[new2zukes]

think that the rad was buggered when i got it as it has never let pressure/water out of the cap have taken a gd condition hilux 3 core rad in to ron to get cleaned and have a different size hose put on. will get it back next week. the head and manifold is going to whangerei next week to get plained. so should have it all back together in the next few weeks.u cant even see through it.

[new2zukes]

well here are some pic of the turbo head isnt on motor due to headgasket.


and yes it is totally leak proof have pressurized the tubes with compressed air and squirted soapy water all over the manifold.

[new2zukes]

well i got it all installed and it works mint has heeps of power running 7psi which i need to turn down a bit, i have a slight problem though when i am at full boost and i decelerate the revs drop and the motor cuts out if i boost but not too full revs its fine its only when im gunning it. it then takes a few seconds of cranking for the motor to start again, then im back running as normal. my setup is as follows, lpg mixer, throttle body, turbo, inlet manifold.
timing is checked and is fine, the mixer runs off vacuum to tell it how much fuel to put threw so was wondering if it isnt stabilizing before it reaches idle. hope someone with a little more knowledge can help me out here. ive googled it and other people have had the same issue but they have had ecu issues.

[Madaz]

What kind of gas regulator are you running? Have you installed a balance line to it? i had similar issues when i supercharged my suzuki on lpg.
You also need to run a second balance line to the underside of the regulator.
I also ran up to 20lbs boost blowing through the mixer without any problems.

[Pedro]

well here are some pic of the turbo head isnt on motor due to headgasket.


and yes it is totally leak proof have pressurized the tubes with compressed air and squirted soapy water all over the manifold.

The hose is collapsing as it sees full vacuum when idling or slowing down. Would think silicone hose has same issues. You could put a spring rhat is snug fit to inside of hose to support it. Also is the Turbo off something that saw full manifold vacation accross Turbo? As it may tend to suck the oil past the seals of the Turbo. And remember if the blow off valve dumps to atmosphere you are dumping a very flammable mix out to a hot engine bay

Pedro

[new2zukes]

hi thanks for your replys i was not going to dump the gas air mix into the air i was going to recirculate it. oil leaking into manifold problem is fixed it was the oil return that was too small, now its a 25mm hose:) the silicone hose does not collapse so that problem has been sorted. turbo if off a stock standard nissan terrano. the mixer has a double vacuum hose that connects to the solenoid and that is the only ports in the mixer. the mixer is an impco 125 reg is a j type i think. im using a suck threw not blow threw so balance lines shouldn't be an issue here. i think the balance lines are for give the mixer the right readings so the motor gets the right gas/air mix. may well be wrong.

[Madaz]

hi thanks for your replys i was not going to dump the gas air mix into the air i was going to recirculate it. oil leaking into manifold problem is fixed it was the oil return that was too small, now its a 25mm hose:) the silicone hose does not collapse so that problem has been sorted. turbo if off a stock standard nissan terrano. the mixer has a double vacuum hose that connects to the solenoid and that is the only ports in the mixer. the mixer is an impco 125 reg is a j type i think. im using a suck threw not blow threw so balance lines shouldn't be an issue here. i think the balance lines are for give the mixer the right readings so the motor gets the right gas/air mix. may well be wrong.

Yeah, your probally right, your set up might not need a balance line.
when you use a set up that blows boost through the mixer, the balance lines crank up the gas pressure to compensate for the amount of boost going in, pretty much the same as a rising rate reg, the more boost you run the more fuel you get.

[new2zukes]

i have put a ballance line in and i think it made it better but it still cuts out every now and then will get a bov and dump it into the intake and see how that works, i also turned the pressure down a bit now its running 5psi. thanks for your info.

[Madaz]

The thing with the balance line setup, was that you needed to drill and tap a hole into the underside of the regulator and run a balance line there too.
Nothing i could find on the net or in any of the impco instructions mentioned this, it was only talking to someone who had done a turbo into a car and he had had all these problems as well.
Once that was done, i never touched it again.
BUT..... that was a blow through set up, not a suck through like you have.

It did make sense though, because running a line to the top and bottom sides of the reg, equalised the pressure on both sides of the diaphram

Good luck

[new2zukes]

cheers thanks for the info will try the bov which is my theory as to why it cuts out but if that doesnt work il try out the balance lines. went out yesterday and have it a test without running at full boost and it worked well shame the starter motor didnt agree with me .... again.

[new2zukes]

well finally have fixed my problem with the motor cutting out after boost i ended up putting the butterfly after the turbo and a bov in between turbo and butterfly. now i have the opposite problem it now takes ages for the revs to drop so it is still at about 5000rpm after i let off the throttle then takes about 5 seconds for it to return to normal again. not too sure as to whats happening here if someone has any suggestions that would be great.so just to clarify it goes lpg mixer,turbo,bov,butterfly,inlet