CEF11E

yes possibly, but i have not tested them yet. but i will let you know if they are available. it might be a few months before the neo ones are ready. cheers"

I am pretty sure the shaft is fairlt worn. i am going to take it back out and measure it against holset specs will keep this updated

thanks adriano good find. i have jsut pulled the turbo down and the rear bearing was all choked up and full of burnt oil. also the oil seals were so loose they fell off the shaft when i pulled it out! the new parts all went on fine and I went to reassemble it and as soon as i tighten the compressor wheel down the turbo siezes and will not spin. i have measured all the parts and they are all the same, thrust bearing, oil slinger, bearings, c clips, the lot... the assembly spins perfectly when the nut is finger tight but as soon as you torque it down it siezes!!! I think the shaft has worn on the oil seal fitting c channel due to the old seal blowing and the turbo being used and thrust pulling the assembly towards the compressor. the thrust bearing was worn about 0.2mm my optoins are to loctite the compressor nut in place and run it like it is. I am sure it will be fine as they is no in out play and no side to side play with the rebuild kit in the turbo and the play before was quite bad. I have to do some more thinking... but its a good learning excercise. if it all gets too hard i will just buy another holset

I am in the process of testing 13 different types of JECS injectors (dont ask me where i got them from) i work in the automotive industry. these are all side feed and are the right impeadence for r32 and r33 gtst ecu's they bolt right into the rail of an rb25 and even fit the plugs. once finished I should have availability of 440, 600 and 790cc injectors based on a fuel pressure of 42psi. the problem with this is I have had to BUILD my own flow testing bench and calibrate it against another machine. this is due to most commercial machines do not have toe ability to test 6 800cc side feed injectors. I went a bit overboard and buit a bit of a monster and in the end spent more than a commercial machine costs building it but it is one hell of a machine. once this is all done I am hoping to have sets of injectors available for less than $400 perhaps even $300 if i can get all the parts needed for the right price. I was sick of paying stupid amounts for aftermarket products that are O.E. hopefully I will be able to recoup some of the cost by selling a few sets. I still need to do a bit more testing before i am happy to sell them to people but so far I have a factory idle with bolt in 790cc injectors and excellent atomisation. they will flow enough for 450rwkw safely. that should be enough for almost anyone.

my holset rebuild kit arrived yesterday. it contains new bearings, thrust bearing o rings and oil seal plate, slinger and a new set of clips. i am going to attempt to rebuild the turbo myself. I will keep this updated with my progress. the whole kit cost $80 delivered so if i bugger it up its no big loss.

i wil take the injectors, rail and reg. pm sent

dyno will take a while, i want to pull off the turbo nad replace the seals and i will do the bearings at the same time as they come in the kit. the kit will take a week to arrive from the us and i have a busy month on. but it should be done in about a month. so you will have to wait a while

yep cradle rake is set to max squat. using solid aloy cradle C inserts. transient response is honestly not fantastic. a tune will make it better but it is a bloody big bush bearing turbo. it generates posative boost instantly between 2500 and 3000 but you have to leave your foot in it for a good 1/2 a second before it really builds boost. coming from my hiflow that was way too small but would loose traction at 3000 at jsut a stab of the throttle its a big difference. i probably need to run less rear camber, i have 255 semis on the back and they get fried with ease in a straight line

thanks for the props!! I have ordered a rebuild kit for the turbo and at only $80 its a pretty good value proposition I have got the oiling sorted out now and got the turbo seeing 2.3 lt per min using a 3mm restrictor i made from an old tig tip. this is spot on as per the holset guide. the turbo sounds good and the oil drain is still doing ita job. I have installed the new injectors and given it a basic tune. it is now running 21psi and pulls so hard it feels like it is twisting the chassis. the car flicks the car HARD to the left under boost even in 4th at 110kmph. i think i have to replace my engine mounts. also think i need an engine damper. full boost is reached by 3500 and it pulls hard from 2700 guessing power is around 350rwkw,,, trust me this is WAY to much for a RWD r32. a 280rwkw r32 wiht good suspension and good power delivery would be much faster. i am going to turn down the boost and tune it properly once the new seal kit arrivers. cheers!!

sorry guys all this stuff is now sold. thanks

I am going to take off the return and have a look at it. if its too small i will increase it yep looking at it from memory the return was about 15mm? so yep it might be to small.

thanks for the info I jsut swapped the oil line round and measured the flow and its now flowing 1.2 litre/min and took it for a drive around the block without boosting it but it still smokes so i have ordered a rebuild kit for it from the US. the great part is the kit only cost $50! I will drill out the restrictor further till i get the right amount of flow and then rebuild the turbo. it will be a while till i get it tuned but i am still sure its going to work out good

I have run into a bit of a problem i have not sorted yet. it took me ages to diagnose but bacically the turbo CHRA is filling up with oil under pressure and pushing oil past the rear seal at idle when the car is cold... i thought the seals in the turbo were gone (still could be i am not sure yet) but the signs point to an over supply issue. I took the dump pipe off and there was oil in the rear housing. so i thought it was the seals but there was no problem under boost. I then took off the banjo bolt and fed the oil line into a bottle and started the car for 15 seconds and it dumped 800ml of oil into the jar in 15 seconds! The oil drain is the same as the standard nissan turbo and the same as the bush bearing hiflow i had on the car for 12 months and never had a problem with. the bush bearing hiflow also used the same oil line and never had a problem. just with the holset it appears to not be able to remove all the oil i feed into it. its fine under boost as there is back pressure in the rear housing pushing against the rear oiil seal but under no load the pressure inside the chra is to great. the banjo bolt has no restrictor and an ID of 4mm, being a bush bearing turbo i did not want to restrict oil flow but i may have to or it will blow out the seals. How much oil should flow thru the oil supply line (volume) I have fitted a 2mm restrictor i made from a tig tip. I spun down and press fitted in the banjo. I have started and run the car and now 15 seconds gives about 620ml of oil. is this to much at idle? is my oil pressure too high?

depends how big the turbine is, how much gap there is between it and the housing and how much exhaust gas flow there is. big turbo on a little engine will do what you discribe cheers!

i would look at the small hx35 with the 8^cm housing and the 6 blade compressor or even the small hy30

remember this is on a 30DET i imagine the spool wioll also get better with a decent tune, but may well be lower on the 25det. the seat of the pants feel is much better than the hifolw i had on the car before much more progressive and controllable transient boost comes on hard and fast.

have a look in the Forced Induction section. I have a thread there I have a hx35w installed on my car. 311rwkw @ 17psi still in the the process of tuning it.

a guy a twork also told me about jet drills. hmmm I might give it a go! cheers trent:)

currently it has 370cc's in there and a whole lot of rail pressure to push those numbers. i wouldn't recommend it to anyone. and would never drive it like this on the road. the pressure is now back at 45psi and boost is back to 10 psi. I am about to remove the caps from a set of rb25det injectors and see if the flow spray pattern and flow rate is good enough. there are little caps sopt welded to the end of most sidefeed nissan injectors ans if the caps are removed there is just 1 large pintle just like rb20 and 26 injectors. this increases the flow to approd double, depending on which injector you start with. for an rb25det i have been told between 700 and 810cc they could also be a bastard to tune with. I have access to a CNC machine so with a couple of careful hours i should be able to remove the caps. i will then put them on a flow bench and see what they turn out like. I may just ruin a perfectly good set of injectors but it will be interesting to see if they work as people claim. there are business doing this ecxact modification and charging almost $600 for a set.

adriano, the turbo was bought off ebay, the seller had it advertised as holst lol!! I had been looking for one for a while and spotted this. it sold for $150 i could not believe it... I was expecting to pay $600 for one from the US. but i guess it was because the title was wrong and no one else saw it. I was lucky. I bought this one months ago. If I was after one now I would be looking at truck wreckers that specialise in IVECO, Cummins and Scania. mine is actually has a 10cm^ rear housing and came from a Iveco 6 litre straight 6 diesel. the wastegatte pressure was set to 25psi.

Well I decided I would put it on the dyno this afternoon for a quick check to see if it would be ok to drive it like it is untill I get it properly tuned with the bigger injectors and afm... 1st run - 10psi all good, very rich (9.8:1)and pulled a lazy 246rwkw 2nd run - 15 psi I was a bit nervous and did not mean to up the boost that much! 288rwkw WTF!!! jeebus! this was my power goal 3rd run - 17 psi too lean (12.7:1) just after peak torque and it spiked sharply so boost control needs to be sorted out but it pulled 311rwkw no wonder it felt fast... You should have seen heard the amount of exhaust gas flow on the 3rd run it sounded like a big dirty jet!! boost comes on progressive and hits 17 psi at 3400 rpm but it feels like its on full boost from about 3000. I suspect even more boost will nett no more gain due to the stock manifold. and i don't want any more power than this. I drove it down the road just after the last run on the same boost and it was to brutal... absolutely brutal... so I will swap in the bigger injectors and tidy up the tune as the current fuel curve looks like a stock market chart. also there is a fairly big hole in the midrange due to the timing map needing to be totally redone but the turbo has prooved itself... I suspect the turbo I have needs the oil seals done, either that or the oil drain is not big enough for the turbo as its smoky on start up and occasionally when you back off after full boost. but a turbo repair kit for one of these is only $100 the dyno sheet was BUTT UGLY due to the afr's and timing map so i didn't bother with it but the numbers are great! the dyno operator was fkn impressed, he looked under the bonnet and shook his head and said " looks like stock, goes like a velvet sledgehammer" I had a laugh and decided I would call it just that "the velvet sledgehammer" Wooo Hooo!!!

also don't mind the oil all over the engine and the cam breather dodgyness... mew ones going no shortly... hehe its pretty cool to pop the bonnet and see an engine that looks stock that is capable of making 300rwkw!

well the install is finished now and here are some pics. I still have to make some changes. the intake pipe from the turbo to the intercooler has to be remade as the clamp blows off under boost because i cut the pipe too short. I also forgot to tughten up 1 hosr clamp on my front oil drain from the head and it blew oil all over the engine bay so a good clean will be needed. apart from that its all done. the car was making 250rwkw before and would be making well in excess of that but do not know untill i get the tune done, probably about 3 weeks away from now. liike i said before apart from the blue ghey silicone hoses it looks nearly dead stock, the airbox is off in the photos so you can better see everythng.

I left the ring in place as the car is supposed to be a "no attention car" but the spool still sounds cool, even when just cruising a light app of the throttle produces a very loud SSSHHHHHHHHHHOOOOw chhhh chhhh chhhh. it sounds awsome! and yeah, i have the compressor map for mine and did some rough calcs. it is the bigger compressor and should make 300rwkw by 20psi and full boost around 3600. but there will be enough flow for 200rwkw at only 10psi and they will be reached by less than 3000rpm on the 30det. Back in the garage to finish off the install now and take some photos. cheers!

Well the turbo is now on and mostly finished... the intake piping was a nightmare to make and i can not fit the stock blowoff valve anymore because the intake piping sits 17mm higher, this combined with the rb30det 38mm does not give enough clearance. I also kinda screwed up where the o2 sensor plug location was welded in teh dump pipe and it fouls the air con drain hose. but it is all in and running. I have not tuned it yet but it sounds SO HORN! nice deep exhaust note and the intake noise sounds like a jet coming onto boost. I am running around 10psi and have not revved it over 5g.. i stopped when the 255 semis let go in 3rd in a straight line. the car sounds insane, I cant wait to finish off a few little things and tune it, I have some 700cc injectors going in and a Z32 afm. I am pretty sure it will pull over 300rwkw but dont want to push it that hard so will limit the power to there. anything more and i will need new bottom end, clutch, fuel pump, gearbox and $$$ and 300 is enough for any road driven car. I will post up some photos tomorrow. just let me add, putting one of these turbos in a low mount position is not a bolt on proposition, every single connection from the engine to the turbo had to be modified extensively. it took me about 20 hours of labor all up and the results look like they are going fantastic, there is no lag, i am not sure when full boost comes on but its really good. photos to come