NEW External Wastegate on Stock Turbo!
#1
Evolved Member
Thread Starter
iTrader: (24)
Join Date: Oct 2007
Location: Ft. Lauderdale, Florida
Posts: 1,005
Likes: 0
Received 0 Likes
on
0 Posts
NEW External Wastegate on Stock Turbo!
so as some of you may have seen my other thread where i made an ewg set up for my stock turbo by mounting a tial 38mm on a megan manifold with a Y pipe, that set up worked very nice excpet for i didnt take into account that i forgot to divorce the Y-pipe so my spool was terrible but i did hold boost like a champ...
now i ripped all that off and got cracking on another set up with was originally designed by revmoto and with his help i was able to make this new set up which keeps the twin scroll design fully intact and divorced so spool is next to stock... heres the process
here what is was before
new synapse bov (belongs to revmoto also haha)
with IC piping and intake out of the way
turbo and manifold gone
ground down the hotside to expose only the factory wastegate dump
another pic of the hotside ground down
cut the wastegate flow chamber off of my megan o2 housing and used that to connect back to the dp
another pic
and another
the divider keep the gases seperate till the ewg
and a pic with it all fabed up on the bench
and a pic with the factory mani back on
and it all finished back up
sorry for the poor quality pics iphone camera fails
now i ripped all that off and got cracking on another set up with was originally designed by revmoto and with his help i was able to make this new set up which keeps the twin scroll design fully intact and divorced so spool is next to stock... heres the process
here what is was before
new synapse bov (belongs to revmoto also haha)
with IC piping and intake out of the way
turbo and manifold gone
ground down the hotside to expose only the factory wastegate dump
another pic of the hotside ground down
cut the wastegate flow chamber off of my megan o2 housing and used that to connect back to the dp
another pic
and another
the divider keep the gases seperate till the ewg
and a pic with it all fabed up on the bench
and a pic with the factory mani back on
and it all finished back up
sorry for the poor quality pics iphone camera fails
Last edited by evokid511; Jan 4, 2010 at 01:30 PM.
#6
Evolved Member
Thread Starter
iTrader: (24)
Join Date: Oct 2007
Location: Ft. Lauderdale, Florida
Posts: 1,005
Likes: 0
Received 0 Likes
on
0 Posts
nah no videos yet will get some up tomorrow if i cant find my actual camera... and yes this holds boost much better then a factory wastegate... on my old set up i was holding 25lbs to redline with a boost leak and leaking mani... hoping to hold like 27ish now
Trending Topics
#9
Evolving Member
iTrader: (9)
Join Date: Dec 2007
Location: Washington
Posts: 424
Likes: 0
Received 0 Likes
on
0 Posts
same thing here except no work, and it comes with a warranty
#10
Evolved Member
iTrader: (7)
Join Date: May 2008
Location: VaBeach
Posts: 587
Likes: 0
Received 0 Likes
on
0 Posts
its holds 29psi to redline on my fpred, others drop to 27 or lower on a red. And the exhaust chambers are divided on the X turbo, and the flange keeps a tight seal, so i have no leakes. It might not of been the best way to do it, but it damn sure works great.
#12
Evolved Member
Thread Starter
iTrader: (24)
Join Date: Oct 2007
Location: Ft. Lauderdale, Florida
Posts: 1,005
Likes: 0
Received 0 Likes
on
0 Posts
Yeah think I've got it right this time my spool is back to factory and I'm holding boost like a champ but since I've fixed a few leaks I'm now running very lean so going to be getting the tune tweaked a little and see why the power gains were from my last set up... I made 354 wheel before my old set up then went to te ewg setup and e85 and boosted me to 410 but spooling at 4300 so now with a way faster spool I should be making a bit more power now
#13
Evolved Member
Thread Starter
iTrader: (24)
Join Date: Oct 2007
Location: Ft. Lauderdale, Florida
Posts: 1,005
Likes: 0
Received 0 Likes
on
0 Posts
i believe you are correct about his set up... meat evo did you divorce the pipe that connects from the hotside to your ewg? if nto then your spool is prob a little slower then most but you still hold boost like a chamo so its all good... if you divorce the entire pipe all the way to the ewg then your set up will be nasty!
#14
Evolved Member
iTrader: (8)
Just because it holds a higher boost pressure doesn't mean it is making more power.
I'm very interested as I've been considering doing something similar but I really question if it will actually make any more power or just push the turbo so hard that exhaust back pressure skyrockets and the car makes no more power, or may even lose power.
There are definite shaft speed limits on turbochargers. You go beyond the critical shaft speed and all you do is increase stress on everything and make no more power.
I'm very interested as I've been considering doing something similar but I really question if it will actually make any more power or just push the turbo so hard that exhaust back pressure skyrockets and the car makes no more power, or may even lose power.
There are definite shaft speed limits on turbochargers. You go beyond the critical shaft speed and all you do is increase stress on everything and make no more power.
#15
Evolved Member
Thread Starter
iTrader: (24)
Join Date: Oct 2007
Location: Ft. Lauderdale, Florida
Posts: 1,005
Likes: 0
Received 0 Likes
on
0 Posts
Just because it holds a higher boost pressure doesn't mean it is making more power.
I'm very interested as I've been considering doing something similar but I really question if it will actually make any more power or just push the turbo so hard that exhaust back pressure skyrockets and the car makes no more power, or may even lose power.
There are definite shaft speed limits on turbochargers. You go beyond the critical shaft speed and all you do is increase stress on everything and make no more power.
I'm very interested as I've been considering doing something similar but I really question if it will actually make any more power or just push the turbo so hard that exhaust back pressure skyrockets and the car makes no more power, or may even lose power.
There are definite shaft speed limits on turbochargers. You go beyond the critical shaft speed and all you do is increase stress on everything and make no more power.