i know of the .78 atp makes but its too small

holset makes divided t3's i think, but could you use one of those on something like a 35r?

 

What are your hp goals?

 

how much power are you trying to make?


Modified by blinx9900 at 6:06 PM 10/19/2008

 

id like to max out a 35r or BW258 eventually

i've just read nothing but bad about the .78 t3 divided housing from ATP

i've heard its comparable to a .48 or smaller open housing and i damn sure don't want that on a 35r

i would like something divided comparable to an open .63 hotside the .82 is too laggy for me

i may end up having to do a t4 35r with the divided housing that suits my needs

jeff evans told me i could pick up about between 600-800 rpms of spool with a divided housing in the t4 format

 

Here is a dyno graph of a 35r with an atp .78 divided t3 housing. 93 octane 15psi and Q16 27psi. Again, decide what your power goals are before you pick a turbo.

 

If you're still thinking about the S258, here's a little data about it and what you could expect to make.

http://www.bullseyepower.com/t...a.asp

The test car was a local guy in association with SLS. It was an 81mm sleeved GSR.

 

Running a larger A/R on divided housings is a benifit, not a requirement. The fact its bigger than the most common housing is one easy to see benifit. The fact you get far better gas scavenging (ie less reversion) with high exhaust pressures is something a typical brainwashed "I NEED BIGGER" Honda guy won't see very easily. The divided housing needs less pressure to 'opperate', and also seperates the most destructive pulses from closing valves. Given there are more pulses per second the closer you get to redline, it all comes together.

If that's too many words, I can simplify: a divided housing spools faster & makes more top-end compaired to an undivided housing with the same AR size. I don't know where you heard that 'same as a .48ar' crap; one SIDE of the .78ar housing will flow nearly as much as the entire .48ar housing.

Honestly if you want to make a whole shitload more than the t3 .78ar housing can get you, you reeealy don't want the t3 frame. A striaght t4 housing has many more options as far as wheels and housings go, and will end up making more power if you care more about that than spool time. As shown above, a GT35 even close to maxed out is not a street car, so the importance of spool time gets tossed out the window (unless you mis-shift a lot ).

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boostismycrack &raquo;</TD></TR><TR><TD CLASS="quote">Here is a dyno graph of a 35r with an atp .78 divided t3 housing. 93 octane 15psi and Q16 27psi. Again, decide what your power goals are before you pick a turbo.

</TD></TR></TABLE>

wow that really surprises me with than housing
but IMO it doesn't appear that it spools any sooner than a standard 35r

correct me if im wrong

what was the setup with the car in the above dyno?





Modified by spoolin turbo s at 10:47 AM 10/20/2008

 

84mm gsr, type r cams, jg intake, bdl 72mm tb, j-g fab undivided ramhorn. I didn't buy the housing for spool, I bought it for clearance issues. Its the slimest housing I could get at the time which allowed a 3" downpipe to clear my a/c compressor . Still made pretty good power and spooled decent. IMO the housing is a little on the small side for the turbo, but it still works for my application.

 

so its divided turbine housing and undivided manifold

do you get any of the advantages of the divided turbine housing without a divided mani? from the looks of that dyno it doesn't appear to help the spool compared to a typical setup because jeff evans said that with both divided you should see about 6-700 earlier spool and your dyno looks to spool about like every other 35r graph ive seen

 

Just pick a turbo that suits your needs. At 600hp, your butt dyno won't even notice 600-700 rpms of spool... I still drive this car on the street on the 93 octane tune and its very responsive. IMO its the perfect setup for street and strip. Small enough turbo to be quick from redlight to redlight and big enough to go 139mph in the 1/4. Like I have said before, figure out what your goals are and don't get caught up in the h-t I need the baddest turbo out there for my street car hype...