Compare and discuss

http://www.imperial.org/~sls/S366 map.jpg

I assume this is the S366 with 66mm wheel.

.60 kg/s = .60 * 2.2lb/kg * 60secs = 79.4lb-min

Plotting the airflow traces of a recent datalog with my 50-trim (spools 23psi by 4100RPM), I was to the left of the surge line until 5500RPM (~34lb-min airflow).
At what point would you expect this turbo reach 23psi on a 2.0L 4G63?

As far as the 366 on a DSM and spool time it has yet to be tested. I have a customer we're wrapping up a manifold for who's going to be using one so i'll try gte some info from him as soon as its completed.

On a side note i just finished up an EVO setup tonight w/ the S256 w/ .76AR turbine and its reaching full boost of 20psi by 4000rpm w/ no additional changes to the tuning.

Thanks for the 366 flow map. I'm really tempted to pull the trigger on one but they seem to be around 1500 smackers How does the compressor housing of the 366 compare to the size of a gt40r's compressor cover? Also, any plans for a 370?

nanokpsi said:

Thanks for the 366 flow map. I'm really tempted to pull the trigger on one but they seem to be around 1500 smackers How does the compressor housing of the 366 compare to the size of a gt40r's compressor cover? Also, any plans for a 370?

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366 goes for $1250. As far as the S370 goes the first prototype was just built and tested about a week ago w/ tremendous results but they still may be awhile before their readily available .

Here's a pic of the T3/67 next to the S366 for size refrence.

I 've heard of an undivided T3, I beleive, in .70 a/r that was gonna be released some time in January by BEP. How is that coming along if somebody knows? That would seem to be a decent housing to be paired with the 3xx series. What do ya think?

i am anxiously awaiting that housing too. I can't wait. As far as i know it will be a few weeks still.

nick, I was under the impression you guys didn't offer a solution for divided t3 turbine housings, are you just using an undivided t3 mani with the divided t3 bullseye housing?

definitiveno said:

nick, I was under the impression you guys didn't offer a solution for divided t3 turbine housings, are you just using an undivided t3 mani with the divided t3 bullseye housing?

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We can do our divided manifold in T3 and well as T4, that is ideal situation but we have used the divided turbne housing on undivided m anifold thats how we originally did the testing. We are currently running the .76 divided housing in our EVO w/ an unidvided manifold and its seeing full boost in 3rd gear @ 4000rpm.

PSI2HI said:

We can do our divided manifold in T3 and well as T4, that is ideal situation but we have used the divided turbne housing on undivided m anifold thats how we originally did the testing. We are currently running the .76 divided housing in our EVO w/ an unidvided manifold and its seeing full boost in 3rd gear @ 4000rpm.

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Nick just curious but whats changed, 3 weeks ago you said that was not available. I think you still have my mani, willing to swap me for a fee? Also what type of wastegate setup do you use for the divided housing, single gate with a feed from each side or dual gates?

definitiveno said:

Nick just curious but whats changed, 3 weeks ago you said that was not available. I think you still have my mani, willing to swap me for a fee? Also what type of wastegate setup do you use for the divided housing, single gate with a feed from each side or dual gates?

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Hmm, idk we must have gotten some miscommunication there. I just built a divided T3 Honda setup last week for a S366. But yes we can do our divided manifold in T3 setup as well. Yes i can swap you out. And i set them up for twin 38mm. E-mail me if you could if you wanna switch something up.

Alright folks, I bought a dual wastegate divided t3 mani from nick, now I just need to figure out if I want to use a gt35r with divided housing or one of these borg warner/schwitzers. Trying to make a pump gas monster and it seems the 35r wheel has more flow capability than the s258 betweeen the 18-21 psi marks. Any one have a map for the s362? Having trouble finding one.......

We've added some spec sheets to our site for the both the S200 and S300 series turbos.

S200 series:
http://store.straightlinespecialties.com//product_info.php?cPath=32_88&products_id=228

S300 series:
http://store.straightlinespecialties.com//product_info.php?cPath=32_88&products_id=229

Damn, you know i really do want to give this thing a go but my gut tells me not to be the test dummy here. 35r or s300...........freak.

Go for the S300. No coolant lines, no inline filters, rebuildable, and it's something different. Plus you can choose from the 362/64/66 to meet your goals most closely. If you can wait a week or so, my car's almost finished getting the welding done for the gate so I'll have some feedback on the S256 soon (I'm a previous Green owner for comparison).

Is the 366 available with a v-band exit on the t4?

nanokpsi said:

Is the 366 available with a v-band exit on the t4?

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Yes and there is a brand new one on ebay for sale buy now for $1000. If your looking.

Steve93Talon said:

Go for the S300. No coolant lines,

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meh

Steve93Talon said:

no inline filters,

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meh

Steve93Talon said:

it's something different.

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meh

Steve93Talon said:

rebuildable,

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now thats interesting

Steve93Talon said:

Plus you can choose from the 362/64/66 to meet your goals most closely. If you can wait a week or so, my car's almost finished getting the welding done for the gate so I'll have some feedback on the S256 soon (I'm a previous Green owner for comparison).

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I have been back and forward on the 258 and 362 if I was going to use a borg warner, but my real intention is simply to make the most power possible on pump gas, 92 octane, no nitrous/meth/water/etc....now the 35r is popular on the evo boards, and every car thats had one installed has dynoe'd 400+ without fail. Not the case for 30r, 50 trim, other known pump gas turbo's.

For your goals, any of the turbos that you listed should be well capable of doing it, as well as the S256. If you're seeing those turbos making less, it just means their owners aren't tuning them to their potential.

Update on the S256 - I picked up the car from JM Fab and my first impression is WOW! My old setup was a TD05H-20g with a big SMIC (stock appearing setup). I was still running my old pump/meth map on DSMlink but my meth nozzle hasn't been installed in the new IC piping yet, so the car was a bit on the lean side for pump gas (93 Octane). I backed my MBC down a few turns before I left because I was previously running 28psi on the old setup.

The first time I did a quick 2nd gear roll, I saw about 22psi by 3800 and it crept 1-2 psi up top (I'm running a Tial 38mm with 1 bar spring and I ported the wastegate hole on the BEP housing to remove the flapper seat). I don't plan on running less than 25psi once it's tuned.

I'd have to say the spool up is somewhere between a 20g and a 50 trim. The transient repsonse is insane, once it starts to spool it's at full boost within a couple hundred RPMs. I spun through 2nd easily and it felt squirrely in 3rd too. I'll be shopping for some new tires before I turn up the boost.

Now for the logs. I saw as much as 46 lb/min during my drive home (I'm running an unhacked 2G MAF so that should be pretty accruate). My AFRs were in the 12s and it was knocking a bit up top. Once I get that dialed in, I'll be able to turn up the boost safely. My timing is around 17 up top, but it was pulled a few degrees due to the knock. My 70-89.5 mph time was 1.73 seconds (DSMlink users use 70-90 as a way to compare acceleration). Others with times around 1.7-1.8 seconds are trapping in the low 120s easily.

Overall impression is very good, I can't wait to start playing with the tuning, turn up the boost, and get some C16 in there! I've attached a log to check out (you can download the DSMlink software for free from their site to view it). The pull starts at 76 seconds.

Thanks for the update Steve. Can you possibly update your profile as I know you've come along way since your 14B setup

DSM90AWD said:

Thanks for the update Steve. Can you possibly update your profile as I know you've come along way since your 14B setup

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Done

Just for reference here's a gt35r compressor pumping out 50 lbs/min on pump, that seems to be a few lbs ahead of the s256 right now. Course BrnOuting has had some time to dial in his gear.......

http://www.dsmtuners.com/forums/showthread.php?t=135728&highlight=gt3561

I would think the S256 competes more against the "GT30" (3071 and 3076) than a GT35R by looking at compressor maps. The S256 on paper (compressor map alone) looks to spool a bit quicker than a GT3076R, and produce more power.

I would think the S300 series would be more equivalent to the spool characteristics of a 35R.

Of course, a compressor map doesn't truly tell us how well it will perform with our cars, especially given the exhaust housing differences. And it is not very clear how the manufacturers develop their compressor maps, and it is possible they do so with different conditions.

That's a T3 hotside, of course it's going to flow more air at a given psi. Not to mention that I was lifting at like 6600 because of the knock. From what I can see in that post, he was taking it up to 8k. Lend me your divided T3 manifold and a Tial 38mm gate, and I'll order up a .76 divided housing and have Jim at JMFab make me an o2 housing so we can compare apples to apples.

Punch in the numbers, it comes out within 1-2 lb/min for my setup and the one you linked:

http://not2fast.wryday.com/turbo/glossary/turbo_calc.shtml

As long as you are within the compressor's flow limitations you will flow the same air at a given psi. A differnt turbine housing and wheel will change this.
The 256 is a good deal smaller than a 61mm 35r so it should spool quicker.