Rear mounted turbo advices needed
#21
10 Second Club
iTrader: (26)
Oil restrictors are a heated topic. I've always ran a restrictor on any turbo setup I've had, all journal bearings, and never cooked a turbo. Most that do it will use anywhere from a 0.040-0.080 restrictor. On the pump I don't have a controller it just runs whenever the key is on. I'm using a Turbowerx Spartan that is still going strong, but many run the Turbowerx Exa pump. MAKE SURE YOU RUN A CHECK VALVE ON THE INLET TO THE TURBO. If you dont, oil in the feed will leak into the turbo after shut down and cause all sorts of problems.
And yes, for a daily you'll certainly want a muffler. Look into the turbo muffler style from Thrush or Dynomax, etc. if you want it quiet. You'll want a cutout though for max perfomance if you run anything other than a straight through bullet style muffler.
And yes, for a daily you'll certainly want a muffler. Look into the turbo muffler style from Thrush or Dynomax, etc. if you want it quiet. You'll want a cutout though for max perfomance if you run anything other than a straight through bullet style muffler.
#22
8 Second Club
iTrader: (13)
Definitely need a better tire than an auto for sure. I don't mind topping out the DD at 6300-6500 rpms....variably cams FTW. Being in boost at 1500 is fantastic for my driving style. But that's also why on my Camaro I shifted from the GT67 to the 7665 to the 7875, so it'll rev over 7k no issue.
#23
TECH Apprentice
Thread Starter
Oil restrictors are a heated topic. I've always ran a restrictor on any turbo setup I've had, all journal bearings, and never cooked a turbo. Most that do it will use anywhere from a 0.040-0.080 restrictor. On the pump I don't have a controller it just runs whenever the key is on. I'm using a Turbowerx Spartan that is still going strong, but many run the Turbowerx Exa pump. MAKE SURE YOU RUN A CHECK VALVE ON THE INLET TO THE TURBO. If you dont, oil in the feed will leak into the turbo after shut down and cause all sorts of problems.
And yes, for a daily you'll certainly want a muffler. Look into the turbo muffler style from Thrush or Dynomax, etc. if you want it quiet. You'll want a cutout though for max perfomance if you run anything other than a straight through bullet style muffler.
And yes, for a daily you'll certainly want a muffler. Look into the turbo muffler style from Thrush or Dynomax, etc. if you want it quiet. You'll want a cutout though for max perfomance if you run anything other than a straight through bullet style muffler.
I try to keep it as simple as possible.the less " extras I have to add the better it is for me.
PS for the oil return from The turbo . Do you run a 10AN to the reservoir only? And then a smaller line from reservoir to scavenge pump . And then similar size line to the oil drain back in the pan?
Last edited by Sebambam; 09-08-2022 at 12:44 PM.
#24
10 Second Club
iTrader: (26)
Hah. I have not thought of simple oil restrictor fittings. That's a great "mechanical" way to always have oil in the turbo and resorvoir. CHECK VALVE before Turbo = CHECK!
I try to keep it as simple as possible.the less " extras I have to add the better it is for me.
PS for the oil return from The turbo . Do you run a 10AN to the reservoir only? And then a smaller line from reservoir to scavenge pump . And then similar size line to the oil drain back in the pan?
I try to keep it as simple as possible.the less " extras I have to add the better it is for me.
PS for the oil return from The turbo . Do you run a 10AN to the reservoir only? And then a smaller line from reservoir to scavenge pump . And then similar size line to the oil drain back in the pan?
#25
8 Second Club
iTrader: (4)
A decent vented reservoir would likely eliminate the need for the check valve. None of the aircraft I worked on ran a check valve pre turbo. Just a reservoir gravity drained to the case. check valve sounds easier, but I'd think a properly vented sump would prob be a better more reliable setup.
similar to this...
These seem pretty cheap. Hadn't seen them before.
https://www.sonexaircraft.com/eshop/...oduct_id=17586
Depending on how high you can get the turbo mounted another option would be a stand-alone oiling system. Gravity drain into a gallon sump. Then pump it out of the sump, thru a cooler and filter into the turbo. That was my plan for a truck mounted remote setup anyway. Prob not much room on the BMW tho… unless you put the turbo in the trunk.
similar to this...
These seem pretty cheap. Hadn't seen them before.
https://www.sonexaircraft.com/eshop/...oduct_id=17586
Depending on how high you can get the turbo mounted another option would be a stand-alone oiling system. Gravity drain into a gallon sump. Then pump it out of the sump, thru a cooler and filter into the turbo. That was my plan for a truck mounted remote setup anyway. Prob not much room on the BMW tho… unless you put the turbo in the trunk.
Last edited by Forcefed86; 09-08-2022 at 04:19 PM.
#27
TECH Apprentice
Thread Starter
#28
TECH Apprentice
Thread Starter
A decent vented reservoir would likely eliminate the need for the check valve. None of the aircraft I worked on ran a check valve pre turbo. Just a reservoir gravity drained to the case. check valve sounds easier, but I'd think a properly vented sump would prob be a better more reliable setup.
similar to this...
These seem pretty cheap. Hadn't seen them before.
https://www.sonexaircraft.com/eshop/...oduct_id=17586
Depending on how high you can get the turbo mounted another option would be a stand-alone oiling system. Gravity drain into a gallon sump. Then pump it out of the sump, thru a cooler and filter into the turbo. That was my plan for a truck mounted remote setup anyway. Prob not much room on the BMW tho… unless you put the turbo in the trunk.
similar to this...
These seem pretty cheap. Hadn't seen them before.
https://www.sonexaircraft.com/eshop/...oduct_id=17586
Depending on how high you can get the turbo mounted another option would be a stand-alone oiling system. Gravity drain into a gallon sump. Then pump it out of the sump, thru a cooler and filter into the turbo. That was my plan for a truck mounted remote setup anyway. Prob not much room on the BMW tho… unless you put the turbo in the trunk.
#31
TECH Apprentice
Thread Starter
i see , makes sense i dont think i have much space for a gravity feed reservoir
so a combo of this little direct mount Sump (https://www.sonexaircraft.com/eshop/...oduct_id=17586)
+ a check valve would be a good option i think.
again, the return line from
TURBO- Pump = 10 AN
then from Pump ( with restrictor) to Pan = 10An as well? since its restricted anyways logically thinking, i shouldnt need a 10 AN , right?
so a combo of this little direct mount Sump (https://www.sonexaircraft.com/eshop/...oduct_id=17586)
+ a check valve would be a good option i think.
again, the return line from
TURBO- Pump = 10 AN
then from Pump ( with restrictor) to Pan = 10An as well? since its restricted anyways logically thinking, i shouldnt need a 10 AN , right?
#33
10 Second Club
iTrader: (26)
i see , makes sense i dont think i have much space for a gravity feed reservoir
so a combo of this little direct mount Sump (https://www.sonexaircraft.com/eshop/...oduct_id=17586)
+ a check valve would be a good option i think.
again, the return line from
TURBO- Pump = 10 AN
then from Pump ( with restrictor) to Pan = 10An as well? since its restricted anyways logically thinking, i shouldnt need a 10 AN , right?
so a combo of this little direct mount Sump (https://www.sonexaircraft.com/eshop/...oduct_id=17586)
+ a check valve would be a good option i think.
again, the return line from
TURBO- Pump = 10 AN
then from Pump ( with restrictor) to Pan = 10An as well? since its restricted anyways logically thinking, i shouldnt need a 10 AN , right?
#34
8 Second Club
iTrader: (13)
Huron Speed makes a nice low profile turbo drain that has some extra room for oil. I've used these in a few builds: Huron Speed Turbo Oil Drain Flange - Side Exit - Huron Speed Products
#35
10 Second Club
iTrader: (26)
Huron Speed makes a nice low profile turbo drain that has some extra room for oil. I've used these in a few builds: Huron Speed Turbo Oil Drain Flange - Side Exit - Huron Speed Products
The following users liked this post:
ddnspider (09-09-2022)
#37
TECH Apprentice
Thread Starter
Thanks alot for all the input.
How do you guys support the turbo weight.
how you build your mounts to the frame, chassis etc.
I thoughtthoughtfabbing a mount of the T4 flange
How do you guys support the turbo weight.
how you build your mounts to the frame, chassis etc.
I thoughtthoughtfabbing a mount of the T4 flange
The following users liked this post:
Sebambam (09-10-2022)
#39
TECH Apprentice
Thread Starter
I can share my direct rear mount turbo swap experience as I went through 3 turbos-
Started with the STS upgraded turbo which is a GT67. Light switch but felt choked.
Went to a Billet 7665. Much better and more suited to stockish rpm range. Topped out about 6k, maybe a little higher.
Finally went to a Billet 7875. Pulls to 7k+ and wants to keep pulling. Give up some lowend, but its helped with traction in lower gears. When 3rd gear hits and it wants to spin the tires at 90 mph, its LOL.
Started with the STS upgraded turbo which is a GT67. Light switch but felt choked.
Went to a Billet 7665. Much better and more suited to stockish rpm range. Topped out about 6k, maybe a little higher.
Finally went to a Billet 7875. Pulls to 7k+ and wants to keep pulling. Give up some lowend, but its helped with traction in lower gears. When 3rd gear hits and it wants to spin the tires at 90 mph, its LOL.
i have a new 78/75 ( ebay special) here that i am planning on using
if i would purchase a 76/65 ish turbo i would go cheap ebay as well and see what it does before investing in something better.
so the routing etc is pretty much clear , now its the turbo sizing.
in general i love the "work with what you have" approach