borg warner s300-66 (s366) Feedback
04-22-12, 01:12 AM
#1
borg warner s300-66 (s366) Feedback
Im looking into getting a borg warner s366 turbo to replace my recent precison 6765 turbo. I enjoyed the precision response it offered but was not fond of the turbine wheel size for high boost applications. I know that the borg warner turbo has a considerably larger more rotary friendly wheel. I ran a .96 turbine housing on the precision turbo but would the 1.0 be necessary for they borg warner since the turbine wheel flow more? Id like to have good response and good flow for high boost like 30 psi on my street ported REW. Im also aware that I might be asking for too much and in order to have response I sacrifice flow or vise versa. But i figure its a shot in the dark. Any feedback from anyone with experience with the s366 would be greatly appreciated. thanks
04-22-12, 10:51 PM
#6
Junior Member
Join Date: Jul 2009
Location: on a boat
Posts: 29
Likes: 0
Received 0 Likes
on
0 Posts
04-23-12, 07:54 AM
#8
Racing Rotary Since 1983
iTrader: (6)
i have no direct experience w the S366. i do have some dyno time on the 366's sister turbo, the S363.
if you go to Borg Warner's site, go to AirWerks and S300 you will find compressor maps for both turbos.
while the S363 is a 7.0 sq inch compressor wheel, the S366 is 7.7 sq inches... you would think it would flow around 10% more air... which is 10% more potential hp.
BW says NO.
both the 63 and the 66 flow 77 pounds per minute. the 63 at 35 PSI boost and the 66 at 41 PSI.
77 pounds of air is 580 rw rotary SAE hp max.
this is backed up by a PFS dyno sheet for an S366 which made 610 rwhp. this, however is Standard not SAE so the SAE number is 597. dynos of course vary a bit and my estimate is an estimate and can vary + or - a touch.
so is the 366 a better choice than the 363???
i found the 363 to work very well at higher rpms as evidenced by the lowest egts over 20 psi i have recorded... a stable 1540 F from 4500 to 8600. generally egts rise w RPM as backpressure/heat accumulates preturbo.
i attribute this to the large (in relation to the compressor) turbine wheel and 1.0 A/R on the hotside.
i don't see an advantage in going w the 66 over the 63 as you are swinging bigger wheels and getting no more air.
BTW, anything BW oriented... ScorpionT has the correct answer for you.
howard
if you go to Borg Warner's site, go to AirWerks and S300 you will find compressor maps for both turbos.
while the S363 is a 7.0 sq inch compressor wheel, the S366 is 7.7 sq inches... you would think it would flow around 10% more air... which is 10% more potential hp.
BW says NO.
both the 63 and the 66 flow 77 pounds per minute. the 63 at 35 PSI boost and the 66 at 41 PSI.
77 pounds of air is 580 rw rotary SAE hp max.
this is backed up by a PFS dyno sheet for an S366 which made 610 rwhp. this, however is Standard not SAE so the SAE number is 597. dynos of course vary a bit and my estimate is an estimate and can vary + or - a touch.
so is the 366 a better choice than the 363???
i found the 363 to work very well at higher rpms as evidenced by the lowest egts over 20 psi i have recorded... a stable 1540 F from 4500 to 8600. generally egts rise w RPM as backpressure/heat accumulates preturbo.
i attribute this to the large (in relation to the compressor) turbine wheel and 1.0 A/R on the hotside.
i don't see an advantage in going w the 66 over the 63 as you are swinging bigger wheels and getting no more air.
BTW, anything BW oriented... ScorpionT has the correct answer for you.
howard
Last edited by Howard Coleman; 04-23-12 at 07:56 AM.
04-23-12, 12:33 PM
#9
That is pretty good egt's.
Thanks for the info Howard but dont you mena the s362 (s300 series turbo)?
I also have another problem. I built my manifold off of a precision 6765 and im wondering if the bw would sit any different on the manifold and have fitment issues?
Thanks for the info Howard but dont you mena the s362 (s300 series turbo)?
I also have another problem. I built my manifold off of a precision 6765 and im wondering if the bw would sit any different on the manifold and have fitment issues?
Last edited by silverfdturbo6port; 04-23-12 at 12:38 PM.
04-23-12, 02:29 PM
#10
Racing Rotary Since 1983
iTrader: (6)
i am no expert on BW nomenclature. they win the award for zillions of "different" turbos if you just look at the tags. and they all vary a zillionth. i think the problem is marketing and doesn't lie w BW, rather the dealers attempting to gain a proprietary foothold. (which i do not condemn, it is good old american capitalism but does muddy the water)
anyway, if you go to the source.... BW...
you will find they have a series of turbos that share the same general frame/size.
in the S300 category you have the 62, 63 and 66. (inducer size)
so you can call one of them an S300/63, or a S363. each do have different wheel dimensions.
my BW is the S300/63 or if you want to get technical BW PN 177283. 1.00 T4 divided hotside. V band back end.
it will bolt to any T4 manifold and you will need to alter your downpipe, as it has a larger than 3 inch V band.
if your P is a T3, of course, you would need to swap in a T4 flange.
howard
anyway, if you go to the source.... BW...
you will find they have a series of turbos that share the same general frame/size.
in the S300 category you have the 62, 63 and 66. (inducer size)
so you can call one of them an S300/63, or a S363. each do have different wheel dimensions.
my BW is the S300/63 or if you want to get technical BW PN 177283. 1.00 T4 divided hotside. V band back end.
it will bolt to any T4 manifold and you will need to alter your downpipe, as it has a larger than 3 inch V band.
if your P is a T3, of course, you would need to swap in a T4 flange.
howard
Last edited by Howard Coleman; 04-23-12 at 08:20 PM.
04-23-12, 03:22 PM
#11
i don't know about the turbo fitment, i think the s366 is a little bigger than the precision.
but your down pipe wont work with it, the BW turbos have a special exhaust housing outlet that uses 20 degree taper "marmon" style V-Band flanges also the size of this V-band is 3.5"
but your down pipe wont work with it, the BW turbos have a special exhaust housing outlet that uses 20 degree taper "marmon" style V-Band flanges also the size of this V-band is 3.5"
04-23-12, 05:44 PM
#13
The S363 is a great turbo with excellent response. For what its worth the 62mm FMW will flow 71lb max, and the 60mm cast (S360) 68lb. As mentioned above the 63mm cast wheel will do 77lb, very similar to the 66mm cast.
04-23-12, 08:45 PM
#17
Most exhaust benders has a tubing flare tool on it so just flare the 3" to fit tight into the 3.5" and you save your self money on a reducer and a cleaner more professional look.
On a side note Ive been talking to Turboblown Engineering and comp turbo is going to make me a custom turbo. A 6771 with a ct43 compressor 1.0 turbine housing. Not sure if i want ball bearing or not yet
On a side note Ive been talking to Turboblown Engineering and comp turbo is going to make me a custom turbo. A 6771 with a ct43 compressor 1.0 turbine housing. Not sure if i want ball bearing or not yet
04-23-12, 09:42 PM
#18
Most exhaust benders has a tubing flare tool on it so just flare the 3" to fit tight into the 3.5" and you save your self money on a reducer and a cleaner more professional look.
On a side note Ive been talking to Turboblown Engineering and comp turbo is going to make me a custom turbo. A 6771 with a ct43 compressor 1.0 turbine housing. Not sure if i want ball bearing or not yet
On a side note Ive been talking to Turboblown Engineering and comp turbo is going to make me a custom turbo. A 6771 with a ct43 compressor 1.0 turbine housing. Not sure if i want ball bearing or not yet
if your going custom, might as well and spend the extra money for ball bearing setup.
Elliot will build you a nice turbo and you will be very happy with it.
