Holset Hx35w Installation In Standard Low Mount Position

[Cjmartz2k]

Touche sir, touche

[wolverine]

so far the results look great so the dyno results will be interesting to see but the seat of pants feedback after tuning will be the big seller to me.

such a large turbo intuitively looks like it would be really laggy with pathetic transient response however it is making power much earlier than i would have credited.

it is great to see such positive feedback so far with this install.

[CEF11E]

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.

[SimonR32]

i wonder if a hx30 would be similar in installation on a rb20

should go fairly well on your results

[CEF11E]

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

[Toda1]

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

Put some more pics up mate car and engine from outside the bay very impressive build.

[CEF11E]

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?

[Cjmartz2k]

Do you have a high volume oil pump? Most of the DSM guys in the states run restrictors on them depending on where they get the oil feed from and whether or not they have the "balance shafts" installed.

[Cjmartz2k]

http://www.dsmtuners.com/forums/turbo-syst...-35-oiling.html

http://www.dsmtuners.com/forums/turbo-syst...-too-small.html

[CEF11E]

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

[Adriano]

Are you going to increase the size of the return, my trucks turbo has a 22mm internal id return

[CEF11E]

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.

[robots]

CEF11E, congrats with new car! By the looks of it, its an animal!

[CEF11E]

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!!

[SLAPS]

Nice results.

How is part throttle boost around 2500-3000rpm?

Given the power you estimate if it shows true on the dyno its a damn good alternative to the gt30 and 35.

I presume you have a little cradle angle pushed in? If found this to soften the blow of a hard boost transition giving the tyres the best change to hook up.

[SimonR32]

I presume you have a little cradle angle pushed in? If found this to soften the blow of a hard boost transition giving the tyres the best change to hook up.

couldnt say it better myself... run some whiteline (or whatever) cradle bushes set to traction and not much rear camber and you will have tons of grip

i could load up my gtr with 575rwhp in second gear with 235 nangkangs and it would only wheel spin a little, but it squatted and gets the fcuk outta there

Edited June 8, 2009 by Cerbera

[CEF11E]

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

[Sheriff Wan]

You madman!!

Seems to be coming along nicely - great work.

[Lithium]

Sounds like a lot of fun! Though definitely sounds like its in between the GT30R and GT35R in terms of spool, won't comment on power until you get it on a dyno - is this due to happen anytime soon?

[CEF11E]

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