Threads like this are just priceless. 'No boost' and 6weeks later no one has (or if they have ive missed it) tried another turbo on the car. Wind and pi55ing spring to mind
Threads like this are just priceless. 'No boost' and 6weeks later no one has (or if they have ive missed it) tried another turbo on the car. Wind and pi55ing spring to mind
I think Ians tried another turbo on the car now.Originally Posted by stuTHC
Threads like this are just priceless. 'No boost' and 6weeks later no one has (or if they have ive missed it) tried another turbo on the car. Wind and pi55ing spring to mind
I couldn't fit one as i didn't have spare nor did Raj so we were abit suck on that one.
I'm sure Adam would have notivced but can the wheels be put on the wrong way at all ?
Yes T25 but it will be very laggy with that turbine. You might be able to fit the 0.49 from a tomcat onto that turbo though.
I once rana Nissan 200 S13 blower on a 5 many moons ago now, it had a 0.64 back end on it (as standard) and it was laggy as fcuk and at full chat wouldn't produce more than 10psi (if memory serves) even with the actuator locked shut.
Just going to ask the stupid question, can you confirm that the turbo shaft hasn't sheared? I know that it's very unlikely but, I'm just curious?
Shafts not snapped mate as the compressor wheel is spinning freely when reved. Was something we thought of though.
I personally think its a knackerd rear housing or mis-matched wheel and housing on the front or rear.
I can't wait for this to be sorted out Raj. I'm sure you're well past that stage.
i had a t25/t2 that was laggy as hell, removed it and found that the back end was a 0.63 AR....was physically the same size externally. this is why i asked.......
raj turbos can be such pigs, i've had 4 on my new project this week and found only one to be any good. The 3rd turbo i tried was very much like your symtoms and found that exhaust turbine blades were touching exhaust housing (ebay item). But with a little bit of turbo housing swaps i know have a functioning turbo. Don't blame the 5 mate just bad luck. Your car will be worth the hassle once on the road
Turning the housings is a pretty minor problem, easy enough to do it yourself. As far as rebuilding the turbo goes, its completely different for each turbo really. depends how fubard it is.
Just out of interest, have you tried eliminating as much of the pressure side of the circuit as possible i.e. pipe straight from the turbo to the carb, and cut out all the rest of the circuit for a quick simple test - divide and conquer style? How are you loading the engine to generate enough heat to drive the turbine anyway?
ie a human fart had a better chance of producing more pressure!
More pressure perhaps, but not more flow, that wouldnt be nice.
stu not all of us have a spare turbo to handi did actually ask on here to borrow one to no avail.!
Post #52
perhaps he didn't want to bang on a smokey turbo on a newly built engine, I know I wouldn'tPost #52
Pah wont hurt it, only smokes on idle when hot.
the fail bus arrives.....perhaps he didn't want to bang on a smokey turbo on a newly built engine, I know I wouldn't
everyone knows putting a decent turbo on a newly built engine will screw the turbo. (unless you run an inline turbo feed filter)
putting smokey turbo on the newly built engine will not knacker the engine.
so in actual fact you have gotta find someone who will lend you a working mint boosting turbo, that you can guarantee you wont kill....
I enjoyed that one
My exact thoughts sparkie, who wants swarf going through a nice condition turbo. The oil only goes out of the exhaust anyway
My exact thoughts sparkie, who wants swarf going through a nice condition turbo. The oil only goes out of the exhaust anyway
and what if oil gets past the seals and dumps a whole load into the intake?
WHY?
A newly built engine with it's new various internal components will take different times to reach full efficiency and require different approaches to make sure they bed in properly. We all know that's why we use running in oil as the new components will have a few high spots that could actually need to be worn off the various mating components and thus causing contamints in the oil hence an oil and filter change and that is the reason why you don't want to use a decent working turbo as you will fubbar it.
RAJ I have a smokey T2 turbo that holds good oil pressure and boosts fine if you fancy using as you are only going to use briefly to see if your system boosts up fine I would say the turbo i have will be fine to use, i keep it as a spare as it works just a smoker you can use it for postage to yours and back to me
Thanks James!A newly built engine with it's new various internal components will take different times to reach full efficiency and require different approaches to make sure they bed in properly. We all know that's why we use running in oil as the new components will have a few high spots that could actually need to be worn off the various mating components and thus causing contamints in the oil hence an oil and filter change and that is the reason why you don't want to use a decent working turbo as you will fubbar it.
RAJ I have a smokey T2 turbo that holds good oil pressure and boosts fine if you fancy using as you are only going to use briefly to see if your system boosts up fine I would say the turbo i have will be fine to use, i keep it as a spare as it works just a smoker you can use it for postage to yours and back to me
I used to use run in oil. And do not rev the angine over 3000rpm for the first 1000kms. And for the very first start I used to disconnect the ignition for some turns just to have oil pressure. But this inline oil filter is an even better solution.
But have to use a custom oil feed pipe. What kind of filter do you use?
Thanks
When I say run in oil I just use Halfords Cheap stuff run it in for 100miles and the drop it and change engine oil filter if you have a oil feed filter aswell just a case of taking the metal gauze out and cleaning it up properly, with ref to engine oil filter I use a standard spec GTT FRAM filter, with ref to getting an oil feed filter speak to www.thinkauto.com, you don't need a custom oil feed pipe it's just a case of getting the oil feed filter to match the threads on your oil feed pipe.
Im not sure Renault built the engines, put shagged/ smokey turbos on, used run in oil for 100 miles, dumped the oil and filter and changed the turbo to a new one before it hit the forecourts!!!
Yes contaminants may enter a rebuild, but generally from a less than clean working environment / parts and possibly from cheap mass produced non oe parts.
didnt the engine that came new from renault a few years ago have blackened exhaust ports - like they'd been run? my memory is getting like Marts. lol
Raj - you ever noticed how much swarf appears in the turbo oil feed filter?
no way. you're at least 25 years younger than him
Sparkie, by the way my post wasnt intended as a reply to your posts, i have just read the whole thread !didnt the engine that came new from renault a few years ago have blackened exhaust ports - like they'd been run? my memory is getting like Marts. lol
Raj - you ever noticed how much swarf appears in the turbo oil feed filter?
Where does this swarf come from? If the block is immaculately clean and all components fit correctly then ????
Casting/machining drilling and tapping of threads and general dirt when being put together.
You can never be too clean with engine building!to be honest, and ive checked the inline filter many many times and theres not one bit of swarf. but remember this build hasnt even seen say 30miles yet.
i am really anal when it comes to rebuilds.too much infact!
But there is also a filter at the bottom of the oil pump.
With fresh engine rebuilds i use an old furbered T2 exhaust housing which has had the guts taken out and a plate welded over. Also weld shut the waste gate flap, theres plenty of cracked exhaust housing out there. Find it excellent for putting some miles on the car whilst flushing oil and water systems out.
well.. tbh it doesnt sound too good for turbo developments. At this point i would have quite a bit to say to them. But thats what you need to do. Tell them what your concerns are and im sure they will sort it out.
tbh looks like you know enuf... its not rocket science..
Raj do you know what the spec of the turbo is?
I would of tried to sort the issue out with TD myself before having a rant at them on the boards to be fair!
If you run the car with the T25 and you have no boost, then run it with a known good turbo and you make boost then the issue seems to point to the turbo but it would be best to take it up with your supplier. Taking a pop on a public board is just going to get their backs up!
I would ask TD what was done originally during the rebuild, as in a specific list of inspections, parts removed and fitted. I would also ask TD to measure up your comp and tubine wheels so you know what spec you've got.
The above information is for your peace of mind and not a witch hunt.
Hopefully this current step gets it all sorted.
Does the turbo create any boost at any rpm? ive got a tomcat exhaust housing but not sure on the impellor side sizings. mines pretty useless till 3500rpm
Also can you see the compressor wheel spinning when you rev the car? possibly even spinning on idle.
i have a rover tomcat turbo here that does the same, it spins but wont make any boost.
Weird one, if its spinning on idle id presume the exhaust side fits well(not a massive housing on a small wheel) and the exhaust port is sealing well. You left the actuator piping disconnected too didnt you?
If you pressed your hand on the compressor housing would it try to blow it away or not. You'd probably of had to rev it pretty hard a couple of times.
I was with Ian when we tried this, hardly any pressure coming from the compressor housing when you rev it hard
give it back to TD. Tell em it still dont work, yet other turbo's work on you car. Simplezzz
If it was me i would be going off my nut, but to be fair to TD let them check it over again then take it from there mate, ethier way surly there must be some cash coming your way, well i would to think so anyway !
Well, just as suspected. Adam has fitted the turbo to a 5GTT this evening (in his own spare time, 3 hours of it) and the car ran sweet as a nut! They took it to 14 psi with no issues. As he is so sick of this ongoing saga he has even taken photos and videos of it running. Raj, Adam wants a call first thing in the morning if you can please, office opens at 8
Cant get much fairer than that as time is money ! good on ya AdamWell, just as suspected. Adam has fitted the turbo to a 5GTT this evening (in his own spare time, 3 hours of it) and the car ran sweet as a nut! They took it to 14 psi with no issues. As he is so sick of this ongoing saga he has even taken photos and videos of it running. Raj, Adam wants a call first thing in the morning if you can please, office opens at 8
Glad thats been tried, i couldnt understand it making no pressure. Ive seen some pretty fubard turbos still producing good boost.
Sparkie.......................where did you get that
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