Full 4” exhaust will add 20-50whp?!!!
No, mines 4" from the turbo back. V band connections the whole way.
A full 4" exhaust, with a 4" downpipe (AT BOTH ENDS), and an exhaust that's truly 4" (or transitioning to dual 3") the whole way adds 15-20 WHP on the stock turbo and upwards of 40-50 WHP on an upgraded turbo.
It's not listed on their website. Good to know. Pretty poor salesmanship on their part, though, to be one of the few truly performant Supra exhausts and not say anything about it. But I'm just some dude, I suppose.
What's with the drivers side piping blocked off?SHS Autosport does. It's a v-band connection. It uses 2 mufflers, so it's not as loud as some exhausts.
This is A hemholtz resonator to remove drone.
I'm not sure how much it helps. In sport it drones at 2k. So around 70 on the highway is a bit much. But in regular mode there's no drone.
Ahh I see it now on their site, in the photo above it literally looks like the other side of the exhaust, lol.
Loved my AWE touring, with the stock dp it may have had the best overall tone of any setup I’ve run
On a Pure 800: +33 WHP, +27 WTQ with no changes to the map -- only change was 3.15" exit DP and 3.5" exhaust to 4" exit DP and 4" exhaust. I don't have the dyno sheet, but I have personal knowledge that this customer was then able to revise their map for more boost and ended up around +44 WHP/+35 WTQ versus their previous best. The turbo was just suffocating with the stock 3.15" downpipe exit.
On stock turbo:
Red is stock car (317 WHP)
Blue is stock car + tune (408 WHP)
Green is a stock catback + typical catless 3.15" exit downpipe (429)
Orange is same DP from green + more aggressive tune (428)
Black is 4" downpipe + 4" exhaust + same tune as orange (438)
Customer picks up a nice gain just by removing the restriction of the cat (+21 WHP). Customer makes the tune more aggressive and gains nothing from it. Customer adds full 4" exhaust and gains another +10 WHP on the same tune.
But these kind of gains are not new knowledge. People have been proving massive gains from larger exhausts for a long time, because turbos love large diameter exhausts. It's one of their core principles. The less restriction you put behind the turbo, the faster they can spool, the more air they push, and the more power they make. For example, here's another Supra doing similar in 2011:
On 3" DP + 3" exhaust it made 527 WHP at 19 PSI
On 3" DP + 3.5" exhaust it made 567 WHP at 19 PSI
On 3.5" DP + 3.5" exhaust it made 610 WHP at 19 PSI and spooled 200 RPM faster
This is very analogous to our MkV Supra with an upgraded turbo: Inline 6 powerplant, same engine displacement, similar boost levels. Same debates about exhaust sizing. Turbo cars keep proving that all things being equal, a bigger exhaust is simply better. Every time.
If you get an exhaust that keeps the 3.15" downpipe exit, you're throwing performance away.
And throwing away your hard-earned money...On a Pure 800: +33 WHP, +27 WTQ with no changes to the map -- only change was 3.15" exit DP and 3.5" exhaust to 4" exit DP and 4" exhaust. I don't have the dyno sheet, but I have personal knowledge that this customer was then able to revise their map for more boost and ended up around +44 WHP/+35 WTQ versus their previous best. The turbo was just suffocating with the stock 3.15" downpipe exit.
On stock turbo:
Red is stock car (317 WHP)
Blue is stock car + tune (408 WHP)
Green is a stock catback + typical catless 3.15" exit downpipe (429)
Orange is same DP from green + more aggressive tune (428)
Black is 4" downpipe + 4" exhaust + same tune as orange (438)
Customer picks up a nice gain just by removing the restriction of the cat (+21 WHP). Customer makes the tune more aggressive and gains nothing from it. Customer adds full 4" exhaust and gains another +10 WHP on the same tune.
But these kind of gains are not new knowledge. People have been proving massive gains from larger exhausts for a long time, because turbos love large diameter exhausts. It's one of their core principles. The less restriction you put behind the turbo, the faster they can spool, the more air they push, and the more power they make. For example, here's another Supra doing similar in 2011:
On 3" DP + 3" exhaust it made 527 WHP at 19 PSI
On 3" DP + 3.5" exhaust it made 567 WHP at 19 PSI
On 3.5" DP + 3.5" exhaust it made 610 WHP at 19 PSI and spooled 200 RPM faster
This is very analogous to our MkV Supra with an upgraded turbo: Inline 6 powerplant, same engine displacement, similar boost levels. Same debates about exhaust sizing. Turbo cars keep proving that all things being equal, a bigger exhaust is simply better. Every time.
If you get an exhaust that keeps the 3.15" downpipe exit, you're throwing performance away.
