riceball777

iTrader: (33)

I'm looking for a upgrade turbo for my s2000 and I have decided between the garrett gtx3576r with a t3 .63 hotside or the borg warner efr 7670 with the t3 .83 hotside. Which one should I go with. I have always been a fan of garrett turbos but I have read that the boost response/ transit response and spool is amazing and superior because of the titanium turbine wheel from the EFR.

JohnBradley

iTrader: (30)

I take it you already have a T3 manifold on the car? I would suggest the 7670 of those 2 choices. Stock motor or built?

riceball777

iTrader: (33)

yes this will be going on a stock s2000 motor and I know a t4 twin scroll set up is superior in every way as I do have a t4 twin scroll setup on my evo but I already have a t3 setup on my s2000 and I only want to change the turbo and not the whole manifold setup.

I just want to know if both turbo are of equal size and equal power potential which turbo will be better. A garrett GTX or a borg warrner EFR? Does the titanium turbine wheel of the EFR really make it respool and respond that much better. I have asked in a lot of otherforumes and i'm getting a lot of mixed opinions. Some people sware by the new erf turbos saing nothing will come close to the spool ad transit response and other people say the garrett's GTX lie is the best money can buy.


Here is a pic of my current setup. I'm currently using a garrett ball bearing 50trim turbo



Here is my current dyno. 395whp on 91 octane 11psi and 501whp on e85 17 psi

JohnBradley

iTrader: (30)

Well there is only one 3576 in use on this board that I am aware of and I havent been able to find the VDR sheet for it in Twin Scroll thread. 240Z Twinturbo owns that one. The Ti wheel in the 7670 is literally half the mass of a coventional wheel which is going to be big for initial spool as well as transient response.

3576-

https://www.evolutionm.net/forums/ev...eriment-9.html

He switched it sometime near the end of the thread but I havent seen the test data, or I keep staring at it and not realising what it is PM him and he can supply it I am sure.

240Z TwinTurbo

iTrader: (25)

Thanks Aaron...

I believe the GTX3576R is the closest in size to the EFR 7670 based on physical dimensions of the wheels. As far as which is better, hard to say from what I have seen and depends on what you are seeking. I have yet to see hard data to say transient response is better and I have not seen one on a 2L that spools as well as my GTX3576r, but that is also a function of my manifold and TS setup.

Here are a few links for reference data...

https://www.evolutionm.net/forums/ev...0hp-375tq.html

https://www.evolutionm.net/forums/ev...-gtx3576r.html

JohnBradley

iTrader: (30)

Thanks my friend...that is awesome.

Now off to read.

Aaron

Blue91lx

iTrader: (44)

If you can find one, I'd say the EFR will eat the GTX up in transient response.

R/TErnie

iTrader: (32)

2235cc Evo on E85 in 4th gear. 7670 EFR 1.05AR TS T4. Nuff said.

nollij

iTrader: (21)

2.2l 4g64 block, tubular exhaust manifold with magnus intake and S3s correct? That spool looks amazing. You going to an 8374?

Makes me want to do a 7670 with 2.3l and "Revhard" type exhaust manifold with stock intake manifold. Ugh. The cost for all that is not in the books for a long time though... engine + turbo + piping ~

R/TErnie

iTrader: (32)

^ yeah... all the things that don't make it spool up lol.

240Z TwinTurbo

iTrader: (25)

It would be good if you can post your 3rd gear results on pump gas so we can compare to my 2.0L results with the GTX3576r.

31.4psi@4204rpm in 3rd gear and the screen shot is from my dyno run log

R/TErnie

iTrader: (32)

Yeah. 92 oct 19 psi I made 455whp. I'm going back on the dyno next week for more tuning. It's only going to spool up sooner and make more power