GT47 ex. housing question:
08-20-2007, 11:32 PM
#22
Launching!
Thread Starter
Join Date: May 2005
Posts: 210
Likes: 0
Received 0 Likes
on
0 Posts
JZ you still alive? 
EDIT: NVM, i just found the consumption table. Working diligently.
AAAND after 101 it appears the consumption table has zilch to do with exhaust housing selection.
EDIT: NVM, i just found the consumption table. Working diligently.
AAAND after 101 it appears the consumption table has zilch to do with exhaust housing selection.
Last edited by stevewix; 08-20-2007 at 11:47 PM.
08-21-2007, 07:44 AM
#23
LS1Tech Co-Founder
iTrader: (34)
Oh they make a 1.23?
There is a thread on www.TheTurboForums.com that talks about efficiency, guy compares a 76mm T4 to a 88 T6 (something like that) on a mod motor Ford. Seemed like the point was that both were equal at 20psi, but after that the bigger T6 kept making more power.
I'd love to see you actually measure backpressure. I have said to friends that I would upgrade to a bigger turbo if I was (a) racing, (b) fast, and (c) went with more cubes.
There is a thread on www.TheTurboForums.com that talks about efficiency, guy compares a 76mm T4 to a 88 T6 (something like that) on a mod motor Ford. Seemed like the point was that both were equal at 20psi, but after that the bigger T6 kept making more power.
I'd love to see you actually measure backpressure. I have said to friends that I would upgrade to a bigger turbo if I was (a) racing, (b) fast, and (c) went with more cubes.
08-21-2007, 10:54 AM
#26
Originally Posted by Pro Stock John
Oh they make a 1.23?
There is a thread on www.TheTurboForums.com that talks about efficiency, guy compares a 76mm T4 to a 88 T6 (something like that) on a mod motor Ford. Seemed like the point was that both were equal at 20psi, but after that the bigger T6 kept making more power.
I'd love to see you actually measure backpressure. I have said to friends that I would upgrade to a bigger turbo if I was (a) racing, (b) fast, and (c) went with more cubes.
There is a thread on www.TheTurboForums.com that talks about efficiency, guy compares a 76mm T4 to a 88 T6 (something like that) on a mod motor Ford. Seemed like the point was that both were equal at 20psi, but after that the bigger T6 kept making more power.
I'd love to see you actually measure backpressure. I have said to friends that I would upgrade to a bigger turbo if I was (a) racing, (b) fast, and (c) went with more cubes.
Also the key is turbine map , vs A/R, vs comp map. That is an art though and you can't simply just use consumption charts etc....for that.
02-11-2008, 04:08 PM
#29
Launching!
Thread Starter
Join Date: May 2005
Posts: 210
Likes: 0
Received 0 Likes
on
0 Posts
needed to wake this thread up, I still haven't changed anything because I drive the car on the street a lot. Can anyone tell me how going to the 1.23 A/R housing will change my spool characteristics?
02-11-2008, 04:36 PM
#30
TECH Enthusiast
Join Date: May 2007
Posts: 538
Likes: 0
Received 0 Likes
on
0 Posts
Pictures of siad kit with Wastgate routing and parts specs. Also what type of camshaft are you running ? If I saw a gt47 make 710whp on a mustang I would be worried.
Hey guys, about a month ago I dyno'd my car on a mustang MD1750, made it to 710 rwhp @6000 rpm through an unlocked turbo 400 @ 21psi. going to 22psi made the exact same power, and literally grenaded one of the exhaust manifold gaskets (multi-layered aluminum made by percys). Maybe i'm the dumbass for running aluminum manifold gaskets, but the old gasket has a gap somewhere around .25" wide. It isn't BURNED, it's ragged and looks like it simply exploded.
Getting to the point of my post, I've never checked exh. backpressure, I'm running a gt47-88 with .96 a/r housing on a 370. Is it possible i was out of power on the dyno after 21psi because the exhaust housing is too small? I've never hooked up a pressure gauge to the exhaust side, is there a certain gauge or sensor that will take the heat?
I would be interested to know what a/r some of you out there are running on similarly sized turbochargers.
Getting to the point of my post, I've never checked exh. backpressure, I'm running a gt47-88 with .96 a/r housing on a 370. Is it possible i was out of power on the dyno after 21psi because the exhaust housing is too small? I've never hooked up a pressure gauge to the exhaust side, is there a certain gauge or sensor that will take the heat?
I would be interested to know what a/r some of you out there are running on similarly sized turbochargers.
04-08-2008, 08:01 PM
#31
Launching!
Thread Starter
Join Date: May 2005
Posts: 210
Likes: 0
Received 0 Likes
on
0 Posts
2.5" y pipe into a smooth t6 merge, 2" wastegate y-pipe coming off the 2 pipes leading to the merge. 1.625" primaries on shorty headers, cam specs 230/220 116 LSA with roughly .580 lift. Help me find my bottleneck, i'd greatly appreciate it.
