ForOnceTheTruth

Im looking into getting the ETS twin scroll GTX3582R, but my question is:

Whats the difference between a T3 and T4. I know they have different flanges on the manifold, but other than that. Any difference power/spool/life wise?

I already emailed ETS and asked but they havent gotten back to me yet.

So thanks for your helpful answers.

murlo26

iTrader: (9)

Call ETS, you will get an answer right away.

They will be able to figure out your actual goals and what you want out of the car and recommend the best kit for you.

Given your limited knowledge between the two I'd say keep it simple and do a single scroll t3 kit. You unlikely have the supporting mods to run a t4 turbo. If you went t4 you'd want to do a twinscroll variant to help in spool but again, I am guessing you don't have a built motor or anything so I wouldn't recommend anything besides a t3 single scroll kit.

MadBoostedEvo

iTrader: (1)

Read up!

http://www.forcedinductions.com/help.htm

ForOnceTheTruth

A T4 has more volume then a T3. I already new that. The area of the flange is like 1.75 bigger on the T4 which in turn effects spool.

I was wondering if anyone tried a T3 then a T4 on the same setup and what they observed in terms of lag vs power. How much is the difference T3 vs T4 on the same setup? Or has no one tried that?

Thanks.

The only supporting mod you need for an upgraded turbo is a good tune, upgraded fuel system, intake, and exhaust. Depending on how much boost youre pushing of course. Im not going for 450 HP, once I get close Ill build my engine. 500 HP is the general guideline of what a stock block can handle anyway.

I mean DG motors has a 620HP X with a stock block.

Why would someone not run twin scroll on a GT35? Twin scroll decreases the lag on a big turbo. Its the best of both worlds. Faster spool and more power along the whole power band.

DevilDog7

iTrader: (1)

Torque kills stock blocks.. not hp..

ForOnceTheTruth

Well you're not going to have a 600hp car with 100 lbs of torque.

murlo26

iTrader: (9)

Maybe on a honda motor that revs to 20,000rpms

ForOnceTheTruth

That would be an interesting drive.. Haha

Anyway,

So no one has any helpfully answers?

Cellar Door

Funny you mention a GT35, I ran a journal bearing GT35 T4 .68 AR(not divided) on my 2g TSI stock 98 block, 272 cams, tubular ex. manifold, meth (would kick in at 15psi).

I ran 27psi, which on canadian 94 made ~450-480whp(depending on the season). I saw 5psi at 3500rpm, it needed 4700rpm for all of the 27psi.

That compared to a turbonetics T3 60trim with a stge 5 wheel(no idea what the ar was, got it with the car) was in a complacently different league and I hatted the gt35 for the street compared to the 60trim. The smaller 60trim was perfect for the street, GT35 was all top end. So if you are willing to sacrifice the spool, which even with a twin scrool turbo of that size you will and are willing to spend the money on a built motor then go for it.

I'm more then happy with the super quick spool of the stocker and beyond a EF2, I would not go but it all depends on your end goals. Cheers

ForOnceTheTruth

Well it's a gtr3582x. So it has the new fins that are supose to decrease lag and it's ball bearing. I was hoping that along with twin scroll would eliminate a lot of lag.

And thank you for actually providing a helpful answer.

RU EVO

iTrader: (5)

Go T4. The T3 tends to get choked up. The biggest housing you can get for a T3 is 1.06 which is the equivalent of a .63 open which is what I run. T4 also has more options in turbos you can run.

ETS Michael

iTrader: (91)

I'm with the guy above.

Run the T4 setup w/ the 1.06 A/R. This hands down seems to be the best setup when running twin scroll turbo kits for spool and power delivery.

The T3 setup have similar A/R's but due to being a T3 the exhaust housing is much smaller which chokes up flow and reduces top end performance.

T4 Twin Scroll or T3 Single Scroll would be my choice.

Thanks,

Michael