BW S256 Question - Page 3

damnslowtsi · 07-17-2007, 12:18 AM

I have one more question for wt71gas or for anybody who may know. Is there any way to special order either an S366 or 62 with the smaller compressor housing like the one on 256/58 units? I know it is a dumb idea since I 'll probably be loosing a few points of efficiency as well as increasing the chance of a surge. The reason I ask is I want to put one of those on my Colt and the space is very limited there. I 'm sure others have put large turbos on those cars but the comp. housing of 3xx series turbos is even bigger a bit than garrett's 'S' housing. May be there are some ways around it but I 'd like not to do any major hacking on it if possible. Thanks.

IPT · 07-17-2007, 09:31 AM

The S258 has a S300 sized cover on it. The only one with the smaller cover is the S256.

wt71gas · 07-17-2007, 09:45 AM

Quote:

Originally Posted by damnslowtsi

I have one more question for wt71gas or for anybody who may know. Is there any way to special order either an S366 or 62 with the smaller compressor housing like the one on 256/58 units? I know it is a dumb idea since I 'll probably be loosing a few points of efficiency as well as increasing the chance of a surge. The reason I ask is I want to put one of those on my Colt and the space is very limited there. I 'm sure others have put large turbos on those cars but the comp. housing of 3xx series turbos is even bigger a bit than garrett's 'S' housing. May be there are some ways around it but I 'd like not to do any major hacking on it if possible. Thanks.

Quote:

Originally Posted by IPT

The S258 has a S300 sized cover on it. The only one with the smaller cover is the S256.

That is not true IPT. I just sold an S258 last week with the smaller cover on it. Bullseye makes the S258 with the smaller cover for all the mistsu guys who don't want to dent the water pipe.

Bullseye will sell a S362 or a S366 with a smaller compressor cover if you want. You might hurt efficiency a little but it can be done. Might be useful if running that big of a turbo in a small area.

prostreetdsmx1 · 07-17-2007, 10:55 AM

that was probably the one off that they made for me a while back that i ended up not using.

It's not something they normally sell but can do a one off of. They CAN make anything you ask for but it's not a standard cover for the 58.

Quote:

Originally Posted by wt71gas

That is not true IPT. I just sold an S258 last week with the smaller cover on it. Bullseye makes the S258 with the smaller cover for all the mistsu guys who don't want to dent the water pipe.

Bullseye will sell a S362 or a S366 with a smaller compressor cover if you want. You might hurt efficiency a little but it can be done. Might be useful if running that big of a turbo in a small area.

me612 · 07-18-2007, 11:03 AM

I'm no good at reading compressor maps, but which one of these flows a similar amount of air to an SC61? That was the original turbo I wanted, but looking into these now instead. I'm torn between the 258 and the 362. It'd be awesome to get one of them in the smaller cover as well! I'm sure it'd hinder performance a little, but it is definately a tight fit in there.

wt71gas · 07-18-2007, 11:26 AM

A good turbo for you I think would be the S258 with the smaller cover. I think this will flow about the same depending on how much boost you plan on running. I think that the extended tip turbos are already underrated as far as trim size goes and above 15psi they will flow an extra 6-8 lbs/min. Here are the trim sizes as shown in the catalog.

S256 49 Trim
S258 53 Trim
S362 54 Trim

I would say that if you are running in the upper 20's as far as psi an S258 would probably flow as many lbs/min and spool up over 1000rpm sooner.

I spoke with AWDer about his S256 and how it performs at about 6000ft elevation. We both were pretty impressed so far and i'm sure he will be posting more results in the near future.

me612 · 07-18-2007, 11:58 AM

Thanks. I'm currently running E85, and on a PTE SCM50, am running at around 23psi right now. I'm working on a couple issues (aren't we always) and plan on running more like 25-27psi. This winter the 50trim is coming off, and I'm going T3. So I'm looking at these. I plan on running around the same boost (25ish) on the new setup with whatever turbo I end up with. I think the SC61's are rated at something around 63lbs/min. So just looking for something comparable to that. I have a friend running an SC61 E-Cover/.63 exhaust, and I like the power level that his car is at, so I'm looking for something similar. If the 258 can do similar to that, but spool quicker, and use the smaller cover, then that may be what I will end up going with, mated up with probably the .7a/r BE T3 housing

IPT · 07-18-2007, 02:47 PM

Green lines are an S362 in a .85 T3 turbine housing @ 38psi
Blue lines are an SC61 @32 psi (this is all the turbo would put out)

Before some one starts yelling about the different boost pressures. The S362 @ 38psi of boost had 18 degree cooler intake temps then the SC61 did @ 32psi. Also 32psi is all that the SC61 would make on this setup.

This was on a fully built SRT4 with a cast log style manifold.

dsm-onster · 07-18-2007, 03:22 PM

I'm not seeing anything but a little red x. . .

damnslowtsi · 07-18-2007, 03:47 PM

Same here, only a red cross for me. I 'm very curious to see that since I have an SCM 61 and will most likely be getting one of the BW in the future.

One more question for the guys 'in the know'

Would it cost any extra money to put a 362 or a 366 into a smaller cover and if so how much? Thanks for all the replies so far.

93AWDTalon1 · 07-18-2007, 03:54 PM

What a/r turbine and turbine wheel were on the sc61? And is the turbine on the S362 divided or open? Also what did the S362 make on 32psi?

wt71gas · 07-18-2007, 04:09 PM

Quote:

Originally Posted by damnslowtsi

Same here, only a red cross for me. I 'm very curious to see that since I have an SCM 61 and will most likely be getting one of the BW in the future.

One more question for the guys 'in the know'

Would it cost any extra money to put a 362 or a 366 into a smaller cover and if so how much? Thanks for all the replies so far.

When I spoke to Bullseye Power they said it could be done but asked a lot of questions regarding engine bay size, engine displacement, etc... probably to find the best way to make something like that work in a given application. The S258 that I sold with the smaller compressor cover was the same price as the standard S258 so I imagine the cost would be the same for that too. Only way to know for sure is to have exact specs ready and see what they want tot try and put together.

T9S1i · 07-18-2007, 05:37 PM

who has the best price/warranty on the S256's? Ive only seen SBR offer a warranty from bullseye for a year, but i really dont want to deal with them, ive had bad experiences in the past. Not on a turbo, but smaller orders.
PM me please with the answer if this isnt allowed in an open thread.

prostreetdsmx1 · 07-18-2007, 05:49 PM

all of us distributors offer the same warranty from Bullseye and though i have only had to deal with it once BEP is VERY good about standing behind their products.

T9S1i · 07-18-2007, 06:26 PM

nice, i have their old cast housing for the 14b/16g and its a nice piece. The internal wg failed after a while, but that wasnt anything that an upgrade to an external couldnt fix. It flows pretty well. I went 12.9 at only 15psi with the s16g. Once i break 12.5 with this turbo (which 20psi should give me) i'll be ready to upgrade to this turbo, it seems pretty promising for 11's.

T9S1i · 07-18-2007, 06:46 PM

Quote:

Originally Posted by AWDer

Wayne has certainly done his homework on these turbos. I went ahead and ordered the S256 Extended tip. It is only available in the 64/74 configuration, so easy choice. I plan to run it to the max pressure ratio efficient up here, which is around 34-35PSI, so hopefully I will be able to give out some numbers soon.

Josh

I was looking on bullseye's site and i see that they offer the 74/64 and the 69.5/61.5

Out of curiosity, if the extended tip s256 is the 74/64, then what is the 69.5/61.5???

wt71gas · 07-18-2007, 07:33 PM

Quote:

Originally Posted by wt71gas

Sorry it took me so long to see this guys

The S256 is only available in the 64/74 combination in the bolt up dsm housing. The other size is for a housing that is used on john deere's and has been used on some indian motorcycles. It is not available so I guess that pretty much makes up your mind

Wayne

Quote:

Originally Posted by wt71gas

Here is some current news for you guys. The S362 is available in two different choices as shown above. The S256 will have a smaller turbine wheel in the future but it is mainly the 1.6l and 1.8l honda guys who have been begging for that. Bullseye said the dsm's move enough air for the bigger turbine wheel in that turbo.

T9S1i: Here are the answers from previous posts. They should have it as something they can do pretty soon but it kinda seems pointless on a 2.0L or bigger motor.

IPT · 07-19-2007, 11:40 AM

I fixed the link. Hopefully you can see it now.

The SC61 had the stage V turbine wheel in a .82 T3 4-bolt housing.

IPT · 07-19-2007, 11:42 AM

The S362 was in the .85 T3 divided inlet.

The log manifold was setup for an undivided.

dsm-onster · 07-19-2007, 12:31 PM

It looks like to me that from 3.1K rpms to 4.3K rpms the S362 tune was running WAY leaner than the sc61 tune. I was going to say that even the S362 beat the scm61 in spool time, but I don't get that a/f graph. Did the sc61 need som sort of supper rich ration on spoolup to avoid knock? Was the timing advance too high for the SC61 between those points? If so, Then retarding the timing would allowe a leaner a/f ratio to assist in spool AND would assist in spool in itself.

Otherwise, that's a great set of runs there.

damnslowtsi · 07-19-2007, 03:39 PM

Quote:

Originally Posted by wt71gas

When I spoke to Bullseye Power they said it could be done but asked a lot of questions regarding engine bay size, engine displacement, etc... probably to find the best way to make something like that work in a given application. The S258 that I sold with the smaller compressor cover was the same price as the standard S258 so I imagine the cost would be the same for that too. Only way to know for sure is to have exact specs ready and see what they want tot try and put together.

I 'm j