S300SX-E Options
11-11-17, 05:37 PM
#1
S300SX-E Options
So here is my dilemma: I am looking for a budget turbo for a stock port REW engine that will provide enough air for 550-600 wheel hp (approx. 75-80 lbs of air).
I would love an EFR but the budget just doesn't allow it, so an SX-E is what I am looking at.
There has been a ton of great info posted lately (huge thanks to Howard Coleman for his easy to understand breakdowns of compressor maps and air/fuel requirements!), however it seems like the "S362" and "S366" are the focus of most conversations and there are many other less discussed S300SX-E options. It also doesn't help that the naming conventions are super confusing and don't always point to a single turbo choice.
I was initially leaning towards the "S362" 62mm 83/76. This is a top contender, but will not leave much wiggle room for my upper goals which is why I am investigating further.
I then considered the "S366" 66mm 91/80, but this turbo has mixed reviews and may be a bit too laggy for a street car.
Looking at what is available in between these sizes brings up 5 other choices with little to no rotary related info available:
"S362" 62mm 83/80
"S363" 63mm 87/76
"S363" 63mm 87/80
"S364" 64mm 87/76
"S364" 64mm 87/80
On paper, I like the idea of an 87/76 for my power goals but my concern is exhaust backpressure and EGTs with the 76mm turbine. Can anyone tell me definitively if this is a solid choice for the rotary? If this is a good choice, is there any reason I should choose the 64mm version over the 63mm (was leaning towards the 63mm)?
My initial thoughts on the 80mm turbines was: "if I am looking at something with an 80mm turbine, why not just go with the 91/80?".
Would there be any reason to choose one of the smaller compressor wheels mated to an 80mm turbine?
I am having a hell of a time making this choice and could use some input. Evidence based information would be preferred but I am also open to theory.
As a final note: I was planning to choose the 0.91 A/R housing for any of these turbo options.
I would like to make decent power to 8000rpm, so opinions on pairing turbine wheels to turbine housings would also be appreciated.
This will be my first aftermarket single turbo, and I hope to make a choice I wont regret.
Thanks in advance!
-Alex B.
I would love an EFR but the budget just doesn't allow it, so an SX-E is what I am looking at.
There has been a ton of great info posted lately (huge thanks to Howard Coleman for his easy to understand breakdowns of compressor maps and air/fuel requirements!), however it seems like the "S362" and "S366" are the focus of most conversations and there are many other less discussed S300SX-E options. It also doesn't help that the naming conventions are super confusing and don't always point to a single turbo choice.
I was initially leaning towards the "S362" 62mm 83/76. This is a top contender, but will not leave much wiggle room for my upper goals which is why I am investigating further.
I then considered the "S366" 66mm 91/80, but this turbo has mixed reviews and may be a bit too laggy for a street car.
Looking at what is available in between these sizes brings up 5 other choices with little to no rotary related info available:
"S362" 62mm 83/80
"S363" 63mm 87/76
"S363" 63mm 87/80
"S364" 64mm 87/76
"S364" 64mm 87/80
On paper, I like the idea of an 87/76 for my power goals but my concern is exhaust backpressure and EGTs with the 76mm turbine. Can anyone tell me definitively if this is a solid choice for the rotary? If this is a good choice, is there any reason I should choose the 64mm version over the 63mm (was leaning towards the 63mm)?
My initial thoughts on the 80mm turbines was: "if I am looking at something with an 80mm turbine, why not just go with the 91/80?".
Would there be any reason to choose one of the smaller compressor wheels mated to an 80mm turbine?
I am having a hell of a time making this choice and could use some input. Evidence based information would be preferred but I am also open to theory.
As a final note: I was planning to choose the 0.91 A/R housing for any of these turbo options.
I would like to make decent power to 8000rpm, so opinions on pairing turbine wheels to turbine housings would also be appreciated.
This will be my first aftermarket single turbo, and I hope to make a choice I wont regret.
Thanks in advance!
-Alex B.
Last edited by 1badFB; 11-11-17 at 07:58 PM.
11-11-17, 10:24 PM
#2
Full Member
here's a link to my setup and dyno chart I don't plan to make more than 400-450 whp so I went with the .88 A/R s363 with the 76/67 wheel
My tuner was very happy with the spool
BorgWarner 13009097006: S300SX-E SuperCore Assembly 8776 62.99mm / 2.48" Compressor Inducer Dia. | JEGS
https://www.rx7club.com/time-slips-d...11psi-1120693/
My tuner was very happy with the spool
BorgWarner 13009097006: S300SX-E SuperCore Assembly 8776 62.99mm / 2.48" Compressor Inducer Dia. | JEGS
https://www.rx7club.com/time-slips-d...11psi-1120693/
The following users liked this post:
FwkUiWN (11-12-17)
11-13-17, 05:09 PM
#5
So I just overlaid the "S363" 63mm - 87/80 compressor map on the "S362" 62mm - 83/76 map, and it doesn't seem like the S363 will provide any noticeable advantage. I may be missing something, but the subtle difference between the two maps is not what I would expect based on size...
The more I look at the compressor maps, the more I think that the 64mm 8780 would be the ticket for me. It is rated at 85 lb. of air, which will leave me with some wiggle room and should spool faster than the S366. This is a real tough decision.. Maybe I should just go with the 83/76 and try to max it out.
The more I look at the compressor maps, the more I think that the 64mm 8780 would be the ticket for me. It is rated at 85 lb. of air, which will leave me with some wiggle room and should spool faster than the S366. This is a real tough decision.. Maybe I should just go with the 83/76 and try to max it out.
11-14-17, 10:09 PM
#6
Skeese
11-15-17, 04:08 PM
#7
So I just overlaid the "S363" 63mm - 87/80 compressor map on the "S362" 62mm - 83/76 map, and it doesn't seem like the S363 will provide any noticeable advantage. I may be missing something, but the subtle difference between the two maps is not what I would expect based on size...
The more I look at the compressor maps, the more I think that the 64mm 8780 would be the ticket for me. It is rated at 85 lb. of air, which will leave me with some wiggle room and should spool faster than the S366. This is a real tough decision.. Maybe I should just go with the 83/76 and try to max it out.
The more I look at the compressor maps, the more I think that the 64mm 8780 would be the ticket for me. It is rated at 85 lb. of air, which will leave me with some wiggle room and should spool faster than the S366. This is a real tough decision.. Maybe I should just go with the 83/76 and try to max it out.
