T4 vs T3 Spool and HP Difference???
#1
T4 vs T3 Spool and HP Difference???
Hey Guys,
I was wondering if anyone had any data comparing an open scroll T3 to and open scroll T4. I have seen data with the Twin scroll t4 to open scroll t3, but cant find anything on the open scroll T4..
I know back in the day RNR made a the same looking Ram Horn manifold for T4 and T3 open. I am assuming data then said to step up to T4 when you step up from like a 35r to a 40r...
I am particularly looking for 35r data going from t3 to t4 if anyone has any info. But any would be helpful...
Thanks,
Freddy
I was wondering if anyone had any data comparing an open scroll T3 to and open scroll T4. I have seen data with the Twin scroll t4 to open scroll t3, but cant find anything on the open scroll T4..
I know back in the day RNR made a the same looking Ram Horn manifold for T4 and T3 open. I am assuming data then said to step up to T4 when you step up from like a 35r to a 40r...
I am particularly looking for 35r data going from t3 to t4 if anyone has any info. But any would be helpful...
Thanks,
Freddy
#3
Evolving Member
iTrader: (3)
Join Date: Dec 2006
Location: Abq, NM
Posts: 219
Likes: 0
Received 0 Likes
on
0 Posts
Hey Guys,
I was wondering if anyone had any data comparing an open scroll T3 to and open scroll T4. I have seen data with the Twin scroll t4 to open scroll t3, but cant find anything on the open scroll T4..
I know back in the day RNR made a the same looking Ram Horn manifold for T4 and T3 open. I am assuming data then said to step up to T4 when you step up from like a 35r to a 40r...
I am particularly looking for 35r data going from t3 to t4 if anyone has any info. But any would be helpful...
Thanks,
Freddy
I was wondering if anyone had any data comparing an open scroll T3 to and open scroll T4. I have seen data with the Twin scroll t4 to open scroll t3, but cant find anything on the open scroll T4..
I know back in the day RNR made a the same looking Ram Horn manifold for T4 and T3 open. I am assuming data then said to step up to T4 when you step up from like a 35r to a 40r...
I am particularly looking for 35r data going from t3 to t4 if anyone has any info. But any would be helpful...
Thanks,
Freddy
I would love to see the data you are referring to between the ts t4 and the open t3. I am not saying ts t4 doesn't work but I just want to see the same vehicle with both, which will probably never happen...
#4
Evolving Member
Join Date: Jun 2004
Location: Australia
Posts: 371
Likes: 0
Received 0 Likes
on
0 Posts
Different people have different opinions , mine is that the only justification for using a single entry T4 International flanged exhaust manifold is to merge large diameter runners . Large runners that can communicate with each other into a common collector will accentuate any reversion issues which your four cycle air pump (engine) won't thank you for .
To each their own , cheers A .
To each their own , cheers A .
#5
Found this thread on a different form.. very interesting..
http://www.dsmtuners.com/forums/turb...ivided-t3.html
"According to some information that I have read, and hearsay from the folks at PTE, a .68 t4 will flow a little more and spool a little better than a .82 t3 (both undivided). Other than that i'm sure your not going to get any great information out of this...."
"One of the guys from AMS said something pretty similar to that. I don't remember the exact details but I think they swapped a .82 T3 with a .68 T4 on a GT35R and picked up quite a bit of power and had a similar spool."
http://www.dsmtuners.com/forums/turb...ivided-t3.html
"According to some information that I have read, and hearsay from the folks at PTE, a .68 t4 will flow a little more and spool a little better than a .82 t3 (both undivided). Other than that i'm sure your not going to get any great information out of this...."
"One of the guys from AMS said something pretty similar to that. I don't remember the exact details but I think they swapped a .82 T3 with a .68 T4 on a GT35R and picked up quite a bit of power and had a similar spool."
#6
I don't see why you would want a t4 open scroll. Go with a t3 open or a t4 twin scroll, simple as that. This is a thread that could easily get out of hand. A t4 ts 1.06a/r is about the same size as a t3 .63a/r.
I would love to see the data you are referring to between the ts t4 and the open t3. I am not saying ts t4 doesn't work but I just want to see the same vehicle with both, which will probably never happen...
I would love to see the data you are referring to between the ts t4 and the open t3. I am not saying ts t4 doesn't work but I just want to see the same vehicle with both, which will probably never happen...
#7
EvoM Guru
iTrader: (1)
Different people have different opinions , mine is that the only justification for using a single entry T4 International flanged exhaust manifold is to merge large diameter runners . Large runners that can communicate with each other into a common collector will accentuate any reversion issues which your four cycle air pump (engine) won't thank you for .
To each their own , cheers A .
To each their own , cheers A .
Trending Topics
#8
Evolving Member
iTrader: (3)
Join Date: Dec 2006
Location: Abq, NM
Posts: 219
Likes: 0
Received 0 Likes
on
0 Posts
#9
Account Disabled
iTrader: (7)
here is a t4 singlescroll vs t4 twinscroll comparison on a subaru of T4 singlescroll vs T4 twinscroll spoolup/midrange -- at 5800ft elevation. This test was performed using the identical turbo, identical manifold, identical downpipe, wastegates, charge pipes, etc. The ONLY difference was the turbine housing was swapped from singlescroll to twinscroll, and the singlescroll was at 25PSI due to knock showing up on the singlescroll that was not on the twinscrolls
.88 a/r singlescroll housing
.91 a/r twinscroll housing
1.00 a/r twinscroll housing
the twinscroll .91 and 1.00 spool very similarly, with the .88 losing huge midrange power and much later spool. the top end power is very similar
agree
Thread
Thread Starter
Forum
Replies
Last Post
sssr20det510
Northwest Region
0
Nov 8, 2015 09:24 AM
Morphin
Evo Engine / Turbo / Drivetrain
3
Jun 8, 2011 05:50 PM
21, 35r, collector, difference, differences, evo, flow, housing, manifold, merge, t3, t4, turbine, turbo, twinscroll