Brettus turbo 111 (the ultimate Renesis turbo ?)
10-20-2016, 07:56 PM
#1177
That is to do with my wastegate siamese setup . The siamese was acting as the wastegate restriction at 10psi which allowed the wastegate to be fully open . This meant there was low pressure post siamese which allowed the Bridgeport to flow more air through the chamber . I was hoping this would translate into more whp .... but it didn't.
I concluded from this that the extra air was just flowing straight through into the exhaust and not filling the combustion chamber with fresh air as i had hoped.
Once I wound on boost , this effect disappeared as the wastegate took over control .
I concluded from this that the extra air was just flowing straight through into the exhaust and not filling the combustion chamber with fresh air as i had hoped.
Once I wound on boost , this effect disappeared as the wastegate took over control .
Last edited by Brettus; 10-20-2016 at 07:58 PM.
10-21-2016, 07:12 PM
#1178
Turbine backpressure on front scroll with 1.01 twin scroll housing . Tested at slightly lower boost but same whp and airflow rates.It seems the BP engine has a slight advantage but this could also be due to other minor tweaks i did .
.......old engine 16psi..vs..new BP engine 15psi
3000.................4....................4
4000.................10..................10
5000.................14..................13
6000.................18..................16
7000.................23..................21
8000.................26..................24
.......old engine 16psi..vs..new BP engine 15psi
3000.................4....................4
4000.................10..................10
5000.................14..................13
6000.................18..................16
7000.................23..................21
8000.................26..................24
10-21-2016, 07:27 PM
#1179
Turbine backpressure on front scroll with 1.01 twin scroll housing . Tested at slightly lower boost but same whp and airflow rates.It seems the BP engine has a slight advantage but this could also be due to other minor tweaks i did .
.......old engine 16psi..vs..new BP engine 15psi
3000.................4....................4
4000.................10..................10
5000.................14..................13
6000.................18..................16
7000.................23..................21
8000.................26..................24
.......old engine 16psi..vs..new BP engine 15psi
3000.................4....................4
4000.................10..................10
5000.................14..................13
6000.................18..................16
7000.................23..................21
8000.................26..................24
10-21-2016, 07:40 PM
#1180
Machined the compressor housing for better back clearance on the compressor , couldn't do anything with the parallel section clearance unfortunately.Should make the compressor more efficient plus looks like it's given me better spool by 200 odd rpm.
Also did a mod to the siamese sleeve which made it more restrictive but lessened the chance of any reversion of exhaust gases from one rotor to the other.
And ......modified the engine mount so i could get the intake hose through without squashing it .
Last edited by Brettus; 10-21-2016 at 07:42 PM.
10-21-2016, 11:16 PM
#1182
Just tested the rear scroll ..... Very happy with what I'm seeing here as it is indicating that the front scroll is venting some pressure through the balance tube to the wastegate at 8000rpm vs previous engine which was flowing air in the opposite direction .
This is significant IMO, because there now is very little chance of reversion from one rotor to the other at peak rpm as it indicates a lower pressure area between siamese sleeve and wastegate.
Turbine backpressure difference between scrolls with 1.01 twin scroll housing .
at 15psi...........front scroll......rear scroll
3000.................4...................4
4000.................10.................10
5000.................13.................12
6000.................16.................15
7000.................21.................20
8000.................24.................24.5
This is significant IMO, because there now is very little chance of reversion from one rotor to the other at peak rpm as it indicates a lower pressure area between siamese sleeve and wastegate.
Turbine backpressure difference between scrolls with 1.01 twin scroll housing .
at 15psi...........front scroll......rear scroll
3000.................4...................4
4000.................10.................10
5000.................13.................12
6000.................16.................15
7000.................21.................20
8000.................24.................24.5
Last edited by Brettus; 10-21-2016 at 11:20 PM.
10-26-2016, 05:10 PM
#1183
Possibly will be getting on the dyno on Saturday morning .
Not expecting more power (dyno is a conservative one as well) but am hopeful that the improvements made will allow the engine to run way more safely at the 400 plus power level.
Hitting 450-460g/s which is near the max. of the current maf setup
Near the max. turbo output (62lbs/min)
Injectors are close to max.
Turbo exit pipe is way maxxed
Everything is maxxxxxxxxxxxxxxxxxxxxxxxxxed.
Not expecting more power (dyno is a conservative one as well) but am hopeful that the improvements made will allow the engine to run way more safely at the 400 plus power level.
Hitting 450-460g/s which is near the max. of the current maf setup
Near the max. turbo output (62lbs/min)
Injectors are close to max.
Turbo exit pipe is way maxxed
Everything is maxxxxxxxxxxxxxxxxxxxxxxxxxed.
Last edited by Brettus; 10-26-2016 at 05:20 PM.
10-26-2016, 11:35 PM
#1189
Hybrid Greddy Boosted
Not much detail that I could find. It survived the dyno, making 427whp. Your setup would make a lot more whp at that boost level of course, since you've spent so much time making it very efficient.
I saw that Pac Performance recently advertised drive in turbo installations on the rx8 Oz FB page. Low mount (per the above setup) and top mount options appeared to be available. Couldn't find any details on their website though.
I saw that Pac Performance recently advertised drive in turbo installations on the rx8 Oz FB page. Low mount (per the above setup) and top mount options appeared to be available. Couldn't find any details on their website though.
10-28-2016, 10:20 PM
#1190
it's Sat. in NZ right?
10-29-2016, 01:26 AM
#1192
well well well
good numbers but I'm disappointed. My theory was just disproved.
good numbers but I'm disappointed. My theory was just disproved.
10-29-2016, 02:31 PM
#1194
I might just do that ...lol
I have to say the current setup hasn't been any sort of breakthrough though . Bridgeport has had zero positive effect .
If my theory that the benefits you get in an rew engine are from fuel going straight through the engine and igniting in the manifold , then the wastegate setup i have was never going to take advantage of that effect anyway.
I have to say the current setup hasn't been any sort of breakthrough though . Bridgeport has had zero positive effect .
If my theory that the benefits you get in an rew engine are from fuel going straight through the engine and igniting in the manifold , then the wastegate setup i have was never going to take advantage of that effect anyway.
Last edited by Brettus; 10-29-2016 at 02:36 PM.
10-29-2016, 08:17 PM
#1197
You wouldn't need to add any more fuel into it unless you're running lean or at stoich (which you might be, I don't know anything about E85). My thinking is that it will at the very least lead to a more complete combustion and put abit more energy into the turbo. It's the same concept one of the of the secondary air system functions, which is allowing more complete combustion on startup.
From what I got out of your idea on why the PP is more effective this would do the same thing without introducing and relying on overlap to supply the oxygen to the exhaust.
From what I got out of your idea on why the PP is more effective this would do the same thing without introducing and relying on overlap to supply the oxygen to the exhaust.
10-29-2016, 08:47 PM
#1198
You wouldn't need to add any more fuel into it unless you're running lean or at stoich (which you might be, I don't know anything about E85). My thinking is that it will at the very least lead to a more complete combustion and put abit more energy into the turbo. It's the same concept one of the of the secondary air system functions, which is allowing more complete combustion on startup.
From what I got out of your idea on why the PP is more effective this would do the same thing without introducing and relying on overlap to supply the oxygen to the exhaust.
From what I got out of your idea on why the PP is more effective this would do the same thing without introducing and relying on overlap to supply the oxygen to the exhaust.
I think with your suggestion for the renesis there would have to be unburnt fuel from combustion . I don't think our engines are that inefficient ...........