V6 Twin Turbo - Turbo sizing.

[Lith]

I bought my GT3076R from ATPTurbo.com and I received it within a week of placing the order, the price was reasonable etc. Can't comment on any other suppliers.

If you go through with it, I look forward to hearing how it goes

[RedMist]

I've spoken with a local turbo rebuilder and he pointed me towards the GT22. I hadnt considered it before as I thought it stupidly small for my purpose. However its BLOODY efficient! Basing it on my engine dynamics the map should work beautifully from 450 hp through to a decompressed 600.
It is however a plain bearing, with very good spool for plain bearing, and only appears to be oil cooled.
Its definately being twin turbo charged, its just a matter of getting the bloody car here (I've learned its been delayed until the 17th)

[Lith]

I've spoken with a local turbo rebuilder and he pointed me towards the GT22. I hadnt considered it before as I thought it stupidly small for my purpose. However its BLOODY efficient! Basing it on my engine dynamics the map should work beautifully from 450 hp through to a decompressed 600.
It is however a plain bearing, with very good spool for plain bearing, and only appears to be oil cooled.

Yeah I pondered suggesting the GT22, another one that fell onto my "but its not ballbearing" sword. One of the reasons I had assumed you may have swung for BB core is that they tend to be a lot stronger and tolerant of oil starvation which obviously could be somewhat beneficial to your needs.

Another reason I didn't suggest the GT22 is at least the last time I researched it, I couldn't find results to back up its brilliant looking compressor map... and tend to be a bit dubious of such things. I remember matching one up against a 4EFTE and working out it would be capable of some stupid amount of power, more so than some turbos equipped with larger compressors at high boost levels.

A GT22 would definitely respond very well and should on paper at least make good power but I like the idea of headroom (you may want madness in future) which if nothing else absorbs a bit of margain for error etc.

[RedMist]

A GT22 would definitely respond very well and should on paper at least make good power but I like the idea of headroom (you may want madness in future) which if nothing else absorbs a bit of margain for error etc.

I would like a bit of headroom. But if the turbos were cheap enough, and the manifold flanges the same as an upgrade Garrett then I cant see why not. They are a very weird turbo on paper, stupidly responsive and a massive range of compressor islands both vertically and horizontally. Makes for a very flexable turbo... on paper.
I've just got a quote back from turbo.co.nz the Garrett distributor in NZ and they quoted over $1700 + shipping for each turbo. Its more expensive than most of the GT25's and some of the GT28's. It just seems silly. The next best match in compressor map appears to be the TD05-16g small wheel.
Or perhaps I should just throw a couple of steel wheel CT20b's at it. I already have one here and another just needing a steel rebuild. Its a bastuard that there isnt a compressor map for it.

I didnt think purchasing a couple of turbos would be such a hastle.

[Lith]

Haha turbo choosing is a nightmare. The CT20Bs will be laggy! If you have a spare one, can you not bring yourself to selling it to fund the project?

Sorry are the GT22s were more expensive than the GT25s etc? Or the GT2554R? If so, thats random. I saw you enquired about a price for a GT2554R on Tardme, not sure how much he quoted you - but I'd not trust the <$1000 "GT28RS" turbos on there, you'll find they're very likely to be dodgey knockoffs.

And yeah I've previously noticed the map for the GT22 looks awesome - they look like in some cases they'd out perform larger turbos even in outright power. ATPTurbos GT3071R is another "magic" looking compressor map for its size etc, but they are one I know don't really seem to stand up in the real world as well as the map would for whatever reason imply. Not saying that'd happen with the GT22... but it is bizarre.

[RedMist]

Just purchased a pair of GT2560R - 466541- 4, fittings, gaskets, flanges from Alltech Diesel.
Good boost maps from 450hp through to 620 odd.

We'll now see if paper relates in the slightest to reality.

[barryogen]

Just purchased a pair of GT2560R - 466541- 4, fittings, gaskets, flanges from Alltech Diesel.

Sounds like it is going to be a fun car... what do I win for making the winning suggestion, a ride in it?

I really want a ride in this thing.

[Lith]

Just purchased a pair of GT2560R - 466541- 4, fittings, gaskets, flanges from Alltech Diesel.
Good boost maps from 450hp through to 620 odd.

LOL nice a few side steps along the way I'd imagine that should work quite well too, should be suitably insane.

[RedMist]

Just purchased a pair of GT2560R - 466541- 4, fittings, gaskets, flanges from Alltech Diesel.
Good boost maps from 450hp through to 620 odd.

LOL nice a few side steps along the way I'd imagine that should work quite well too, should be suitably insane.

Its friggkin nutty. I better start on tightening my sphincter muscles now. I've driven supposed 350hp cars before, however its going to be different driving a genuine 450hp+, 1000kg car without a windscreen. Its genuinely scaring me.

[RedMist]

Just purchased a pair of GT2560R - 466541- 4, fittings, gaskets, flanges from Alltech Diesel.

Sounds like it is going to be a fun car... what do I win for making the winning suggestion, a ride in it?

I really want a ride in this thing.

Its a single seater, and considering the money invested I'm going to be the only one in the hot seat for at least the first season. After then I'll have to drag it along to a MM for a play or two. (think they'll allow a Nissan)

Rather dissapointed in the Garrett actuators... wound in tight they still produce 6PSI. LinkPlus will have two settings Nutty (6psi) and AAAAAGHHHHHH (around 11psi)

[Mr Revhead]

rides??
you actuallu have to finish it first....

[RedMist]

rides??
you actuallu have to finish it first....

HEY! .... who am I kidding you're right.

However this time I have someone else to blame. The engine is currently at Full Size Performance awaiting the car to go with it. This one will be finished... its just a matter of two factors... when and how much.

[rolla_fxgt]

If they run race to the sky again & its finished you should run it in the offroader class in that, i think there was about 4 cars running in that, 1 being a hilux from memory, they all seemed to do ok, especially when it was wet

Oh & any pics yet, or do you need to wait till it lands?

[RedMist]

If they run race to the sky again & its finished you should run it in the offroader class in that, i think there was about 4 cars running in that, 1 being a hilux from memory, they all seemed to do ok, especially when it was wet

Oh & any pics yet, or do you need to wait till it lands?

I really would love to run in race to the sky. Rod Millens Tundra is an American short course offroad race car (not at all a hillclimb car) and should run in the offroading class. Last years race to the sky included another Jimco of Kevin Charles. His car is considerably newer, bigger, heavier and powerful than my Jimco. The 560hp Chevy v6 was the engine to convince me to twin turbo my v6.

The photos below dont include the roof or lightbar and the car is still running the near useless hunk of iron Toyota straight 4, 3.2 litre carbed engine.

[flygt4]

do you sell drugs in your sparetime redmist? maybe you are pimping out some hoes?

no way i could afford the sort of projects you seem to come up with

[barryogen]

no way i could afford the sort of projects you seem to come up with

I hear he is old, and so has probably passed the kids and mortgage stage, now he'll have all this disposable income as with the things he does he is unlikely to live until retirement

[RedMist]

I hear he is old, and so has probably passed the kids and mortgage stage, now he'll have all this disposable income as with the things he does he is unlikely to live until retirement

I am old... ancient and wisened... watch the wrath of my zimmer frame
Wife is due in a few months, with our first.
Mortgage... up to the eyeballs... and counting.
Disposable income... see above.
Retirement... almost there. Trying to get back into teaching to keep my idle fingers from punching carp into Toyspeed.

[barryogen]

hows this thing going these days surely it must be damn near built?

[RedMist]

I should have updated the project section but its gotten crazy. Car was nothing but a frame last Thursday. Is now assembled ready, well amost, to go to link to get the triggers configured. Then its fuel cell in (it needs to be out for Link to see the crank pulley) axles in and tuned by NZEFI early next week. It'll be racing on the 10th/11th of May.
Wife just went into hospital with pre-clampsia... will probably be endused labour tomorrow night.

[steve murch]

ball bearing turbos arnt the be all to end all,the biggest down fall with a plain thrust bearing turbo is the fricton from the thrust bearing not the main bearings.
a thrust bearing at 30 psi has as much as 50kg of load on it to which slows things down the most.
if garrett had of takin a set unit stock and changed it to roller bearing it would have make a massive differance. but instead they disided they would then increase the turbine hsg and comp wheel at the same time.
eg: a t28 turbine wheel maxes at 320hp in a .82 turbine,so to get more they step it up to 1.06 thus responce is down but hp goes to 350hp.
i turned a td05 on a libero into a ball thrust bearing unit and back to back it didnt turn on till 4200,then change the thrust it turned on at 2800.
the only down fall making things too responcive is it can put the comp wheel closer to surge but you can mod the comp wheel to over come that the same way they do in wrc.
sorry wont tell that one,lol yea i know bastard!!!