RalliartRsX

Did the 7064 shift the powerband to the right??

RWD4G63

That's the first I've heard of someone having good results from the 7064! In for more info.

nemsin

iTrader: (19)

Do you have a link to the shop that makes that manifold?

alpinaturbo

iTrader: (5)

I searched and could not find G-RF online.
Knowing the owner of this fine Evo 6 2.3 EFR7064, originally his 7163 kit was done at C-Tec Performance, NigelS, in UK.
http://www.lancerregister.com/showthread.php?p=4231408

I am getting a new twin-scoll IWG T4 7163 kit in a few days, from Kikiturbo on this forum.
It has generous radiator room, ample space for full-radius downpipe past AC Compressor, and features equal length runners within 4mm by CAD modeling the layout to optimize by design.

This Kikiturbo EFR manifold was designed to accept EWG EFR7670 and EFR8374, so its versatile extending potential for future upgrades without requiring new manifold.

kikiturbo

you made a typo... only IWG..

RS200

iTrader: (1)

Everything I've seen about the EFR 7064 tells me that it became obsolete the moment the EFR 7163 came out. Perrin did some tuning originally (granted it is on a Subaru), but the dyno speaks for itself - the 7064 got spanked. It wasn't about to catch up to the 7163 top-end either, it flows 4 lb/min less according to published stats.

tutuur

If the 7064 did hold boost it probably would've won top-end seeing the graph. But there's a turbo for every car, Mark Shead in the UK prefers the 7064 over the 7163, granted that's on Cosworths which are oldskool head design

killerpenguin21

iTrader: (20)

What's really caught my interest lately for some reason is the s200sxe which I believe is very close to a 7064. I just bought a house...so my efr money is gone

MrLith

Very interested to see the comparison where this 7064 out muscles the 7163 - how does spool compare?

nemsin

iTrader: (19)

I have also read of some tuners (MAD comes to mind) on lancerregister preferring the 7064 over the 7163.

I think its because for T4, the 7064 is available in 0.92 A/R IWG and 1.05 A/R EWG , while the 7163 is available only in the smaller 0.80 A/R IWG.

tutuur

Yes, Mark Shead is the owner of MAD

it's all just a fine balance, the YB engine probably has alot less VE to begin with so higher pressures might be needed, which would result in more back pressure in the exhaust housing warranting the bigger 7064 turbine and/or AR

MrLith

^ more turbine actually suits higher VE/displacement better. Exhaust pressure versus intake pressure ratio is the real thing to keep an eye on, not specifically exhaust pressure alone.

If for sake of argument a given turbo/exhaust combo would result in ~30psi exhaust back pressure at 500whp - then if you put that on a lower VE engine which needed ~32psi to make that power then the near 1:1 ratio is not bad.

Now, if you get an awesome high VE motor which needs only 20psi to make 500whp then you end up with 10psi absolute higher in the exhaust side than the intake side - which is starting to get a bit ugly and will certainly be costing VE by replacing nice new intake air with nice hot exhaust gas. Yum

RWD4G63

I think the entire S200 line are the most underrated turbos in the BW catalog. Fantastic spool for the street.

RS200

iTrader: (1)

Agreed, I would be running a T4 TS S200SX-E 7670 FMW if my manifold was set up for EWG. Given that the only divided T4 turbo on earth with a good IWG setup is the EFR line, I didn't really have a choice in the matter.

killerpenguin21

iTrader: (20)

yeah, im not ecstatic about EWG...but the more i look at it the capabilities of the turbo it looks worthwhile. most graphs i can find show it should spool around 4k, and its cheaper and probably easily more reliable than a stock frame piece.

is inconel as fragile when it comes to speed as the gamma-ti?