I'm hoping my math is mathing...

Current setup is a freshly rebuilt 13B-REW with stock apex seals and a mild street port in a GSL-SE. Induction is NA through a Weber 48IDA.

I'm currently in the process of acquiring the parts necessary to return it to EFI with FD manifolds, TB, and compression elbow. It will remain NA for a bit while i get the fuel and timing mapped out and I can spend time focusing on as much drivability as possible.

Fuel System
Stock fuel tank and pump feeding a 2 liter surge tank mounted under hood. Single Bosch 044 pump feeding through 6an lines to Deatschwerks FD fuel rails and 4 x 1000cc injectors.

Power goal is 350WHP peak at 7000k RPM.

Most of the turbo options I see discussed are aiming for considerably more power, using considerably more fuel, and going through considerably stronger drivetrain parts. I have no desire to make 500+ HP with this car. My goal is 350WHP. I'd rather not have too big of a turbo. Unless i'm missing something feel like a smaller turbo would better suit my platform and work more efficiently.

My math says i should have no problems supplying 5lbs/m of fuel to accommodate 50lbs/m of airflow. I feel like that is the sweet spot for my power goals.

Looking at the Borg Warner S200SX-R I feel like the numbers line up with my goals.

Is my math right? Am I missing something? All the attention always falls on the S300 line because they make considerably more power and that is all fine and good, but for somebody like myself I have goals for quick spool and modest power. I'm just feeling a sense of trepidation because there is little to no mention of the S200 line being used on any 13B platform.

 

That should work fine. The difficulty with going smaller is you generally have to give up some peak power rpm and usable overrev but it will pick up earlier than a 300 series.


Looks like they do have several larger AR turbine housing options though.

 

+1, that should do fine, in fact you'd have some headroom to go bigger.
i've run a V Trim and now a T04E-46 on my car, and the ECU says both are right at the 300hp mark (i'm thinking flywheel though)

 

I was looking at something similar. Since I have yet to find an s200sxr dyno i threw in some number into the BW matchbot. Below is a a comparison with the s362sxe and efr8374 (different price league just threw in for data). Points at 3,4,5,6,7,8,k rpm. Boost at 7,12,17psi to redline. what drew my eye was that the 362 was more efficient at every point including the low rpm. At the upper end was much more efficient and could go for higher power if needed. Point 5 is hair under 50lb/min. Not sure if that will translate to faster spool down low though. would love to see a dyno tbh.

 

I’ve been playing with the Matchbot a lot lately and I’m getting similar results.

I might just roll with the S362. I like the idea that they’re more prevalent and available than the S200. I can usually find the S362 on marketplace as an unused part somebody bought for a project or tried out and went to a bigger option.

I don’t know… I also like being different so I may just get the s200 🤷🏻‍♂️🤣

 

haha, from some more reading, efficiency does not directly = spool. it is a factor. Plus with the BW matchbot you are inputting PSI and getting a result. maybe the s200sxr is hitting higher PSI and sooner than what is being input. you should do the s200, we need the info. might be a perfect setup for a lot of people. IE a replacement for the twins with similar power + spool, + better reliability and lower heat.

 

im kind of a pioneer

 

SXE 200 was tested at 1.3 bar, and while there’s limited info on the setup. The owner achieved a 100-200 km/h time of 7.84 seconds (no draggy report so unsure if run was valid), which equates to around 400hp (not rwhp). Luckily, this owner even tested the 200-250 km/h range, the time was 9.37 seconds, about 1.5 seconds slower than the 100-200 km/h run. This suggests the top-end performance is limited, as expected with a smaller turbo. Nonetheless, it's still an overall impressive result for this turbo/ small street port combination.

I imagine the S200 sxr might be similar or a touch quicker.

 

I think I’m sold on this one.

My car is an FB with admittedly dodgy steering. I need to fab up some reinforcements for the fenders and the front spoiler before I attempt any kind of speed over 120mph/200kph.

im also traction limited by tire size, they’re essentially my slipper clutch.

 

forgot to add, the two turbos i've used are rated at 44lbs per minute for the V trim and 41 for the T04E-46, the T04E-46 is rated at 350hp (again flywheel) at 13psi. which i think i can do
so you're on the right track there, my setup has no headroom to make more power

and i'll second the notion that 120+ is faster than you want to go in a 1st gen!