3"

 

That was my retarded fault for leaving out the R, I didnt even realize there was a non R version until you said something

 

what plugs were u getting J-rat? Platinum leading u said? I also need some plugs.

 

does teh s5 turbo have the twin scroll also? so it would be best to get the s5 hybrid instead of the s4?

 

s5 turbos do not have twin scroll. the s5 hybrid would be better than the s4.

 

S4 exhaust housing is larger than the S5, you simply take off/weld up the twinscroll and your S4 turbo becomes better than an S5 with slower spool time, but more power.

 

ok so why did it take so long to get this turbo

 

The S4 won't make more power than the S5! That's bullshit.
An S4 with removed twin scrool will have a slower spool but higher overall power compared to a S$ turbo with twin scrool, but both lack compared to an S5 divided manifold.

 

u mean s5

 

Well, Bryan at BNR has a reputation of being a good builder, albeit a bit on the slow side. I felt that the wait was justified, because I was reassured that it was a good turbo, from a reputable builder.

 

No, I meant what I said.
The S4 exhaust manifold is undivided with a twin scroll system. The S5 manifold is fully divided (and superior.)
The Turbo cartridges are the same amongst S4 and S5 turbos, and other than the manifold and wastegate designs, are virtually identical in exhaust sides.
The S5 has a Superior exhaust manifold; there is no way tat the S4 undivided will make more power.

 

I think the use of 'twin scroll' is decieving. To most people a twin scroll manifold simply means a divided as opposed to collected turbo manifold. However to FC owners, twin scroll usually refers to the s4 turbo's design.

I ran a s4 with and without the twin scroll. While the turbo was stock and not a hybrid, I did notice more noticable power in the higher rpms. However I wouldn't reccomend it on a stock turbo, or possibly even on a hybrid. The increased lag simply was not worth the fractional gain in power to me.

 

so simply the s5 cuz of the s5 turbo manifold?

 

Good Lord.
The series 5 manifold is superior in every way to the series 4 manifold.

I'll say it again, just like everybody else:
The Series 5 manifold is superior.

So yes, just because of the manifold.

 

Here is the list everyone has been asking for:

Autometer gauges(boost and A/F ratio), Autometer dual gauge pod, Thunderfabrications 3 inch DP/MP Dawes Devices MBC, Racing Beat FCD, TurboXS Type S BOV, ACV and Airpump are OUTTA THERE, CAI, TID mod, K2RD Aluminum radiator, Perma-cool finger chopper, Racing Beat catback, 720 primaries, 890 secondaries, APEXi SAFC, TB mod, Walbro 255l in-tank Fuel Pump, BNR stage 4 turbocharger.

 

The series 5 has a different exhaust wheel too...

 

Same exhuast wheel, different housing.

 

"I prefer the S4 over the S5 just b/c when I get done with the wastegate portion of the turbine housing, it will be able to control the boost a whole lot better than a ported out S5 turbine housing. The S4 usually run 100 more than the s5 in price, but you don't have to do the conversion from S4 to S5 (manifold/turbo). "

quoted from bryan at bnr.

eric.

 

Any dyno numbers yet?

 

not with the stage four, someone on the boards goes like 330? rwhp with his stage three. i remember reading it

 

hehe some cross referencing for those
https://www.rx7club.com/showthread.p...hreadid=305498

So J when do you have to pass emissions? Thinking of s SP or something when the rebuild comes along?

 

No dyno numbers...See above post..