I have read conflicting info from all over the internet.

Ok so far as best I can tell the only down side to the GT35/40 is the cost invoved.

But its BB so it provides a better low end than the t04r

I understand the the t04r is very inexpensive to rebuild. Correct or no?

And answer me this, generally speaking, All things being equal what kind of life expectancy does each turbo have?



If these questions are to easy for you then forgive me.

Im a single turbo newby

Im trying https://www.nopistons.com/forums/pub...IR#>/smile.png

-Dave

BTW Does anyone have a good pic of a to4R ?

I wanted to see the two next to each other.

The simple fact that the gt35/40 is dual bb and the size configuration makes it more streetable. Still delivers good power to a point. Don't think anyone has dynoed it at 20psi yet though. Ball bearings are just about always more expensive to rebuilt, so the T04R would be the cheaper turbo. Kinda hard to tell how long they will last, but BB will take more abuse and probably last longer.

if you are talking about the HKS brand label To4R its pretty expensive too. I'd prefer the 35/40 for the way the power is delivered. The to4r is sort of a violent all at once power delivery that i don't like because its very difficult to manipulate the way the power comes on using the gas pedal. I don't know how the GT3540 fairs in this respect, but it seems that it starts spooling early and has a sort of gradual (controllable) delivery of power by the looks of the dyno sheets.

I bought my T04-R used.. been useing it for over 2 years now.. it could probably use a rebuild here soon. Total cost to rebuild is around $100 and its somethig that you can do. But its a good turbo, would strongly recomend it.



I had a pic of it on my computer.. but it broke right now..and I have another on the nazi forum.. but guess what.. its screwed up right now also. I'll post a pic of mine as soon as I can.

If I was to choose(money not involved) I'd pick the GT3540. If money was involved, I'd pick the T-04R or turbonetics T-66.



I know...I'm running an HKS T-45S...why aren't I running either of the two...simple...MONEY. https://www.nopistons.com/forums/pub...IR#>/blink.png

To4-R, cause it has an R, like type R, or pirate type arRRRRR.

I personaly would like to upgrade to the t04r but the 35\40 is also very tempting https://www.nopistons.com/forums/pub...1047683358.gif either turbo would be fine for the street, but it would all come down to the size of your wallet

The to4r is ball baring also.

It is? Hmmm I wonder what turbo i'm thinkin of then, i'm confused. https://www.nopistons.com/forums/pub...IR#>/smile.png

I was under the impression tha the t04r was bb aswell.

Van (jspecracer7) swore up and down last night on AIM that the to4r is not ball bearing.

So is it BB or not?

Maybe you can get the to4r bb, but I thought it was non-bb as well.

Doesnt the gt35/40 use a t3 flange?

I started a thead about the to04r at the forcefed forum.



You're going to have to excuse the "noise" from Zavier (1fast7) and Jason (Uwish) from the "other" forum. Debating on cleaning up the garbage or not. Not in the editing mood, I guess.

If the T-04R is a ball bearing turbo, then Dragon just rebuilt a Ball Bearing T-04R for $100.00... https://www.nopistons.com/forums/pub...R#>/unsure.png



I was under the impression that the T-04R and the GT35/40 have the same compressor size(Rutt, you told me this!) https://www.nopistons.com/forums/pub...1047683561.gif

Dave when you go single, keep me in mind for your 99 spec twins.

T04r isn't ball bearing unless you add the option

You wont want my twins when I am done with them.

I broke all the primary inducer blades off my last set. https://www.nopistons.com/forums/pub...IR#>/bigok.gif

Does any one have pics of Nocabs set up?

He has the 35/40.

Then I want a pic of the to4r installed would be cool.

Mitch said his to4r is ball bearing. He got the HKS kit. And yea, the 35/40 is a t3 flange.

Search for nocab's video. He shows a closeup of it. The T04 is not BB unless ordered that way. Yes, the 35/40 is a T3 flange

The TO4R and the GT 35/40 have the same compressor side. The TO4R is not BB and never was. HKS does not offer a BB option for this turbo, and unless some other company is taking them apart and rebuilding them with BB cartridges, they don't exist. The exhaust side on a TO4R is your standard P-trim Garrett wheel and housing. The GT 35/40 exhaust side is your standard restrictive somewhere between T3 and T4 HKS proprietary rotary blower. If you are happy with 450-475rwhp at 17-20psi then go with the 35/40. If you want to make that power at 14-16psi then go with the TO4R. In my opinion I think you guys should leave the GT series turbos to the 2L 4cyl guys since that's what they were made for.

i coulda sworn mitch's hks was BB i guess not ??



http://www.hksusa.com/products/?id=824

I think ppl may have read about a T04R BB from A-Spec's site: http://www.a-spectuning.com/products/rx/turbo.shtml The T04R is not BB.



BTW, where can one get more info on the T04Z...can't seem to find it on Google.

I was under the impression it was not BB, and the to4Z is a BB to4R...

whoo hoo!!! I was right! https://www.nopistons.com/forums/pub...1047683329.gif

https://www.nopistons.com/forums/pub...#>/biggrin.png Rats, guess I better start over then https://www.nopistons.com/forums/pub...1047683785.gif Keep in mind the GT series goes a lot bigger than the 35R!!https://www.nopistons.com/forums/pub...1047683827.gif



Seriously, the GT35R works pretty good on the 2L 4 bangers, though I think they use the smaller exhaust housing. The original question was a streetable turbo, and the 35R meets that requirement.

Well, the t-04R is a streetable turbo as well. Cheaper to repair if things go wrong. Good top end power(since Dave exhaust ported his car). And proly easier to find too.



I like the quick spool up of the GT35/40, but that might have something to do with the small exhaust flange(T3) and it being ball bearing.

Ok so at what RPM range do these reach full boost?

I would expect the t-04R to reach full boost later than the GT 35/40...possibly 400 rpms slower.

Aren't these gt35/40 guys hitting 15psi by 3500 rpms? Just like jspecracer said, expect about a 500rpm difference.

That sounds like what I want.

Any Garrett dealer or distributor can get a GT35R. It's made directly by Garrett, it's not a shop constructed hybrid.



The smaller housing and ball bearing do help the spool, but the GT series impellers are also redesigned aerodynamically for better performance.

Any Garrett dealer or distributor can get a GT35R. It's made directly by Garrett, it's not a shop constructed hybrid.



The smaller housing and ball bearing do help the spool, but the GT series impellers are also redesigned aerodynamically for better performance. [/quote]

I meant cheaper as in rebuilding is yourself. rebuild kit cost $100~ to rebuild a Garrett standard shaft turbo. But I was under the assumption that rebuilds of a ball bearing turbo were virtually non-existent since they cost as much as a new turbo. Am I correct?

I don't know, and I'm not in a big hurry to find out. It's not $100, that's for sure! https://www.nopistons.com/forums/pub...#>/biggrin.png

for a non-ball bearing turbo it is. https://www.nopistons.com/forums/pub...IR#>/boink.gif

Ok, i've never been in a car with a T04R, but i would expect it to be around the same as my T-78. My T-78 has a GT79 wheel so it reaches full boost about 800-1000rpm earlier.. so i see boost at about 3800rpm.



My friend has a GT35/40, it generates boost around 3000rpm and reaches full boost at about 3600rpm. Its more gradual.. The T78 on the other hand is like someone kicks the back of the car.. very violent, but predictable if you know your car and the sounds/tach what not..



If you are planning on doing a lot of street driving, autocross, track events.. but not concentrating on drag.. get the GT35/40 Its a good all around turbo, but won't make the highend power that the t04r or t78 will. They start to fall off up top.. They will still make good power.. probably up to the 500-550hp range if i'm not mistaken.



As for rebuild cost i don't know...



Here is a picture of my friend's GT35/40 setup.. its when he was doing his intercooler...

Here is my t78 setup.. i'm sure its a lot like a t04r...

Thanks Pete.

You need to change your screen name now https://www.nopistons.com/forums/pub...IR#>/smile.png

ok.. here's a close up of my T04-R.. I get boost around 4000.. Its not quite a kick in the ass like what twinturborx7pete said.. but its a damn good push. https://www.nopistons.com/forums/pub...#>/biggrin.png



http://www.rx7club.com/photo/data/50...65_IMG-med.JPG