Anyone using a single BW S369SXE ?!
I swapped from a pair of Turbonetics Tseries Billet 7568s with .81AR to the Borg SXE 369s with 73mm turbine and 88AR. Power was down 200hp and spool went to crap. The netics would be all in at 4600rpm and the borgs werent all in till 6200. I swapped cams and changed stators a few times. I finally put the Turbonetics back on and power/spool was back. I later swapped to a pair of precisions and picked up over the netics. You couldn't pay me to try any of the SXE369s ever again. Testing was done up to 26psi. This was all done about 10 months ago.
So twin 7568's made 800whp at 15psi (judging weight vs trap), but you're saying 6973's couldn't make 600whp at any psi? Something seems amiss since others are making well north of 1200 on the 6973's at mid 20's boost.
Don't remember the whole setup, maybe he had a small exh. housing. Switched to a good old S375 deal and picked up 12-13mph in a truck with the same wastegate spring though.
On The Tree
Joined: Oct 2012
Posts: 171
Likes: 9
Over on performance trucks theres a guy that did a kb racing single kit with the 369 sxe and on 7 lbs of boost it did 470 to the tire. I would think it would be a kick *** instant power little turbo that could do north of 650 tire with the boost turned up.
I have seen LiL John and Jose from forced inductions say that some of those new s300s are garbage. I think they said some of the exhaust wheels just don't work. Hopefully one of them will respond.
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Also had a guy from Cali that experienced the same issues I did. He swapped from a pair of ON3 76mm that made 1180whp at 28psi. The SXE 369s with 73mm turbines wouldn't make more than 970whp at the same 28psi setting. He went back to the ON3s.
I believe your experience. Can anyone provide a more technical answer? These look so promising on paper and I'm sure that BW doesn't pull compressor maps out of thin air, so they must flow. I was hoping to use one on a built 5.3L and run 20 psi, but now I'm having doubts.
Andrew
Andrew
Do you know what kind of pressure ratios you were running? Seems like the SXE line is designed to run at much higher ratios that the older line. Seems more suited to a small engine and a ton of pressure VS a large engine and a ton of Flow. They only flow 105lb/min at like 3:1 pressure ratios. Stick that turbo on a 2 liter and it will sing at 50 psi .
Do you know what kind of pressure ratios you were running? Seems like the SXE line is designed to run at much higher ratios that the older line. Seems more suited to a small engine and a ton of pressure VS a large engine and a ton of Flow. They only flow 105lb/min at like 3:1 pressure ratios. Stick that turbo on a 2 liter and it will sing at 50 psi .
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
Interesting stuff.
how deep/wide were the channel on each cover? BW do claim the sxe cover is a better than the older units. its hard to imagine them dropping a ball.
anyone have any details on Steve Morris provolute mods?
how deep/wide were the channel on each cover? BW do claim the sxe cover is a better than the older units. its hard to imagine them dropping a ball.
anyone have any details on Steve Morris provolute mods?
I believe your experience. Can anyone provide a more technical answer? These look so promising on paper and I'm sure that BW doesn't pull compressor maps out of thin air, so they must flow. I was hoping to use one on a built 5.3L and run 20 psi, but now I'm having doubts.
Andrew
Andrew
Just for fun here is the spool characteristic of my 6.0 S475 compared to the truck above. I brake torqued it about the same amount of time and rolled into it.
They made over 600. They were down almost 200hp compared to the Turbonetics 7568s at 26-28psi. Here are a few pics of why I'm positive they wont make the power. The compressor covers aern't machined enough to allow the volume of air needed. They will make the psi number but not move the volume. Here some pics from when I was playing musical turbos.
I'm wondering if you kept turning up the boost what would happen? You ran 34psi with the Precisions why not the Borgs?
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
The cover on my 364FMW, which even uses the smaller cover as per 362
I'm sure the compressor wheels themselves are very good...but perhaps it is the cover that is letting them down.
Steve Morris modifies Procharger volutes which is supposed to release a good bit of power, and from videos of the work it looks like the work is concentrated in the outer areas mentioned here.
I'm sure the compressor wheels themselves are very good...but perhaps it is the cover that is letting them down.
Steve Morris modifies Procharger volutes which is supposed to release a good bit of power, and from videos of the work it looks like the work is concentrated in the outer areas mentioned here.
TECH Fanatic
Joined: Oct 2015
Posts: 1,280
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From: Pittsboro, IN
Andrew