tdo5 - 20g

[Fiz]

Could anyone give me there honest opinions if this is a 20g or big 16g turbo

thanks in advance

 

[to4garret]

thats just a plain jane Big 16G

 

[milkandoj]

Its based on an E3 big16g at least, based on the numbers 01470.

I cant read your tape well, its hard to get good pics, but look in the inlet snout of the turbo, see that step about 1cm in, a 20g is enlarged on the enducer so that step gets ground away. So id say 16g as well.
If you want to be sure line the tape up with that inner step that starts like 1cm into the intake of the turbo, thats the same as you inducer of the turbo wheel. Compare that to the Big 16g and 20 wheel.
I dont want to say as i cant remember exactly, the info is out there (it may be 48mm for the inducer of big16g and 52mm for 20g double check that though. Both are 68mm exducer)

 

[CLuTZ]

http://www.gtpumps.com.au/wheels.html

 

[Fiz]

thanks for all the replies

I'll give it a measure up

cheers

 

[EVO85]

thats just a plain jane Big 16G

Oh really? lol

How'd you work that one out? Or are you just really bad at guessing?

 

[3zercrowd]

thats just a plain jane Big 16G

Oh really? lol

How'd you work that one out? Or are you just really bad at guessing?

The 20g is designed to "LOOK" like a 16g to fool the everyday eye ^_^
Ninja spec.....Isnt that the whole point of the 20G's? h34r:

Better to measure it aye

Maybe Craig has x-ray AND MEASUREVISION (Tm)

 

[milkandoj]

Im still putting my money on that its a E316g, and not even a 20g build from an e3 16g.
Like i said look at the angled step at the start of the inducer into the turbo. When it gets ground out to match the inducer of a 20g that step is not longer there.

My turbos wheel is a little larger in the inducer to a 20g wheel, and its ground away. But that doesn't prove much coz my wheel is a mm or so larger, but if it was a 20g wheel the band you can see from that step would at least be much much narrower or gone as that material is ground away. That's what had me convinced when i first looked at it.

So now i just got home, and checked my spare big16g if i line the ruler up at 52mm for a 20g's inducer, it would take all the material out where that step is.
If you measure the diameter between where that edge starts its 52mm, then if you line it up with where you recon the inner diameter is its 48mm. I just measured it on a turbo.

I recon Mr x-ray vision is right lol.
I don't know his reasons but they are mine.

 

[to4garret]

Oh really? lolHow'd you work that one out? Or are you just really bad at guessing?

hahahahaha

well, i looked at both pictures and its defiantly not a 20g.

 

[to4garret]

i took a screenshot of the MEASUREVISION ™ in action.

even if the measurements are off, there is no way a 20g would fit.

i looked at the other picture and noted the compressor intake snout has not been milled out large enough even further down the snout either.

chances that the wheel is a 20g, massively slim. hence my first reply, i just couldnt be fucked typing.


cant believe i just made a picture :huh:

 

[EVO85]

hahahahaha

well, i looked at both pictures and its defiantly not a 20g.

Well, the turbo in question was actually owned by me and recently sold to Fiz.

I purchased it new a few years ago - it was assembled and balanced by Bill Keen at Adelaide Turbo Services. It was fitted with a 20g wheel and the internal wastegate was also enlarged to cater for the additional flow. I only recently had Bill from ATS check it's condition and verify it's type whilst my engine being built. Additionally, I still have all the receipts stating exactly what it is.

Fiz, if you continue not to believe me, i'd suggest you take it to your nearest turbo specialist. Evidently, some people on here don't know exactly what they are talking about :lol:

 

[to4garret]

Evidently, people here are working with the information provided.


After looking more closely at the first picture, its possible there is a taper in the compressor snout.

 

[milkandoj]

The only way i can see that being a 20g wheel inside is if the snout into the turbo isn't ground out all the way, but just enlarged where the wheel sits. They are normally enlarged all the way up the snout from all Ive seen.

Or its an aftermarket/copy compressor cover that has a larger snout.

Pull the compressor cover off an measure the wheel all you need it to do is take the circlip off. That will end the speculation.

Hey i could be wrong, but looking at all the info and not having the turbo in front of me i recon its a 16g lol.

If i had the turbo in front of me i could be sure. I can take a pic of my turbo which is basically a 20hg if you like, doesn't look like that.

 

[milkandoj]

Evidently, people here are working with the information provided.


After looking more closely at the first picture, its possible there is a taper in the compressor snout.

oh yeah, that could be the case.

Take the cover off lol

 

[mattrat]

from the first picture you can see where it starts to taper, about 2 cm in. 20g nuff said

 

[to4garret]

Even if it does turn out to be a 20g, it would be like a GrpN car running with a restrictor as the compressor cover inlet is not matched to the inducer of the compressor wheel like every other 20g i have ever seen.

I cant believe you had that turbo built by a "reputable builder" and they/he didnt mill the entire inlet housing out completely. Thats the same as having a 3" exhaust fitted the chocking it with a 2.25" rear muffler.

 

[EVO85]

I don't have the turbo in front of me anymore, so like yourself, I can only go by the photos attached in this thread. And be that as it may, it still made 226.3wkw's on only 1.2bar, so I feel comfortable in saying that it'd make the 400hp E3/20g's are capable of.

 

[to4garret]

come on, you know dyno readings are only relative to the dyno they are read from. true measure is 1/4m trap speed.

It will be fine regardless, you may loose 8.6% cross sectional flow potential and heat the air up slightly more than a cover that was milled properly. but at the end of the day it will be a little better than a B16G :unsure:

 

[BMGTZ]

Well, the turbo in question was actually owned by me and recently sold to Fiz.

I purchased it new a few years ago - it was assembled and balanced by Bill Keen at Adelaide Turbo Services. It was fitted with a 20g wheel and the internal wastegate was also enlarged to cater for the additional flow. I only recently had Bill from ATS check it's condition and verify it's type whilst my engine being built. Additionally, I still have all the receipts stating exactly what it is.

Fiz, if you continue not to believe me, i'd suggest you take it to your nearest turbo specialist. Evidently, some people on here don't know exactly what they are talking about :lol:

hey don't take this the wrong way mate......are you sure the pictured turbo IS the same one you sold? I sold a turbo to milkandoj and it had a larger wheel installed. There was a bit of a lip at the wheel to the housing......but as i recall the snout was milled out quite a bit more than the one in the picture.

 

[milkandoj]

Yeah Brian your right, on that turbo you sold me its milled all the way out and a tiny bit more down the bottom. Its a differnt wheel but almost the same size. I’ve seen a fair few pics of 2nd hand 20g hybrids for sale and they are milled all the way through. Same as a lot of pics of new 20g's ive seen from various companies.

I didn’t see that this one had the milling only in the bottom.
Fiz. Mate you have a 20g, make it hammer!

I was only trying to ID the turbo and coulnt see the milling insid. And going off info provided. If you read through my posts you'll see how i suggested it may be milled only in the bottom, and said to take it apart to be sure.
Im not trying to defame your sale of the turbo evo85. I had no idea of the history of it.
So no I wasn’t trying to be a “turbo expert”