Hypergear Turbochargers and High flow Services Development thread

[Lithium]

122mph sounds a tad unrealistic for 250kw tbh - complete turn around to the other turbos which were getting too low for the power! Will be interesting to hear what it does on a proper dragstrip

[Manuel Kasko]

122mph sounds a tad unrealistic for 250kw tbh - complete turn around to the other turbos which were getting too low for the power! Will be interesting to hear what it does on a proper dragstrip

Trying to organise a spot on a different dyno tomorrow.

Small dyno day down here in Canberra, so I will see what happens.

Also in a few weeks I will get up to the drag strip in Sydney

[Plattsy]

someone point me to the thread which shows you how to modify standard oil banjo to suit highflow please?

[Manuel Kasko]

http://www.skylinesaustralia.com/forums/topic/417373-whoretown-v-in-loving-memory-of-bob-1991-2013/page__st__11220

[Plattsy]

http://www.skylinesa...page__st__11220

motherf**ker.

[Missileman]

250rwkw r33 (Full weight)

14.300 @ 122.6mph

14.909 @ 119.92mph

Does this sound about right?

Got these results from the SAU Nats Airport run

Have you weighed your car?

I drove mine down to the local council refuse tip, and weighed it on both weighbridges to get and average. It urns out a stock auto R32 GTST with a full tank of gas weighs 1385KG. A tad more than the 1280kg quoted in the Skyline book. Obviously you need to know your own weight and subtract it from the reading on the weighbridge.

Edited February 15, 2013 by Missileman

[ARTZ]

Have you weighed your car?

I drove mine down to the local council refuse tip, and weighed it on both weighbridges to get and average. It urns out a stock auto R32 GTST with a full tank of gas weighs 1385KG. A tad more than the 1280kg quoted in the Skyline book. Obviously you need to know your own weight and subtract it from the reading on the weighbridge.

was talking to a weighbridge guy a while back...said the averagely loaded commodore (inc driver ,fuel, junk in the trunk etc) weighs in at 2 tonne

[Missileman]

What surprised me was the entry bridge weighed the car at 1395 and the exit weighed 1375kg. Our council is ripping us 20Kgs

Edited February 15, 2013 by Missileman

[jet_r31]

Its actually very fast, the power delivery is so gradual theres hardly any wheel spin. I'm getting some mickey thompson drag tyres and hitting the strip soon.I think this one can get into the 11sec mark

slick and front runners...should do 10's...

cheers

darren

[hypergear]

So stao what specs is that turbo you put up? Same wheels as a 2535 but larger trim.? Originally I thought 270rwkw would be possible on e85 but the more I think about what r31nismoid said the more I think it will run out up top as the -7 and -9s do on e85. Plus the rear housing is a tiny .64. Wonder how a 2535 would have gone if they made a slightly larger ar rear housing.??? Does anyone think it would be worth putting a billet wheel in. Would it make any difference.

For the SS1, It was too small for a Rb25det, I only recommend it for Rb20/SR20 det engines and they works well.

I did built a .86 version of it and it appeared that compressor went out of puff around 5000RPMs resulting a sharp dip in the power band maxing out similar power level to the .64

52T and 56T 76mm wheels were also trailed, the EGT shot through the roof.

It was a long project but the .86 version did ended up working and refined. the development and testing blog is in this thread if any one like to read, the final version is called the SS1PU.

[hypergear]

That model has been further developed into two additional models, they are the billet SS1 and SS1.5. Results are in page 340

[hypergear]

Swapped steel bearings back to ceramic rollers in the SS2. Its made very noticeable difference in down low throttle response, and I'm aware lot of turbochargers used in rally cars are ceramic bearinged for out of corner speed.

How ever colleges and people I know in the trade choice to support steel bearings, more or less due to the durability of the ceramic surface under heavy load. The majority of turbochargers that we've repaired in the past are steel bearinged also, probably due to the quantity distributed, I have yet to receive a ceramic bearinged turbocharger for overhaul.

Any of you guys experienced ceramic roller bearing turbo failures? if so how long have it lasted at what boost. Cheers.

[XRATED]

I've seen/used/serviced ceramic bearing turbo/other applications in stationary and large marine engine applications... Also in refrigeration/air compressor compressors. Never seen a failure other than lubrication contaminant. Although, most of those applications were slower shaft speeds, less heat... but heavier loads. Ceramic bearings are also used gas turbine engines... increased efficiency (less rotational friction) and better heat handling (less thermal expansion and heat load).

Cheers

Justin

[hypergear]

Thanks for the info. It appears the steel bearings are much quiter in high boost. It is also much cheaper to stock, I will be looking into it a bit more.

This is a pretty interesting turbocharger that I worked on recently. An IHI RH5 twin scroll, twin internal gated. actually has gate in individual pulses. It was very dead when it got here. Now high flowed into a SS1. twin plus VNT turbine is still work in progress, will do further trails once complete before further looking into building some crazy high flows using stock housings.

[Lithium]

Trying to organise a spot on a different dyno tomorrow.

Small dyno day down here in Canberra, so I will see what happens.

Also in a few weeks I will get up to the drag strip in Sydney

How did that go? I saw in another thread that the 119-122mph trap speeds for for 800m - not 400... that explains a lot!

[GTScotT]

i've just ordered a lot of gearbox seals and bits to fix my leaks.

I'll have us an SR SS1PU drag result soon.

Will give hy_rpm a yell too, see how the two compare.

[hy_rpm]

Kando vs Hypergear who will win ?

[hypergear]

Will not win against external gate and proper manifold.

[hy_rpm]

Well I'm on std manifold and int gate aswell ?

My clutch isn't the best but should handle a few more runs

Edited February 19, 2013 by hy_rpm

[Hattori Hanzo 69]

looking at running water meth injection, whats a safe boost level for the tATR43?