Brettus turbo 111 (the ultimate Renesis turbo ?)
#130
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if we extrapolate some data for an approximation
CT2-5862.............................................. .5.614..................5.171..................... . 92
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Last edited by TeamRX8; 07-07-2015 at 10:10 PM.
#131
The spoolup on these EFRs is so spectacular ......... it's a moot point anyway.
And no , I'm aiming for 400 - 450 reliably . with the emphasis on that last word .Something that has not been achieved to date .
But if I can achieve that , someone else may want to take the next step perhaps ...?
Last edited by Brettus; 07-07-2015 at 10:27 PM.
#132
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you can handle it several different ways, but if that's all you want then the 1.06 is too much and only adds more cons than pros again IMO
Originally Posted by turblown @ RX7Club
I didn't tune this one, it was on a PFC in England(FD3S chassis)
7670 IWG @ 1.1 bar, pump gas, stock ports, stock ignition( 9s), 3" exhaust, vmount, bosch 044 etc..
7670 IWG @ 1.1 bar, pump gas, stock ports, stock ignition( 9s), 3" exhaust, vmount, bosch 044 etc..
#133
That 7670 is too small for that aim . As a side note ..... I see the first guy to fit one recently blew his engine AND turbo . ...... Maybe..................... because it's overspooling ??????
#134
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8374 makes that easily without the laggy 1.06 AR, again no need to go there
your facts are off, he broke the front plate where the turbo oil feed line was, turbo seems to be fine, but clearly it wasn't a turbo failure issue that took out the motor
Sad news from my garage.
I just started stripping down my TII and got to the turbo; the no play but the 7670 shaft takes some effort to spin now.
Turbo probably toast from when the front plate cracked right at the turbo oil feed passage.
After talking to a friend who had a similar experience of cranky turbo I put some Seafoam in the turbo oil feel and let it sit overnight and spun the turbo up while hosing WD40 into the turbo oil feel hose.
It spins better than when it was new (wd40 is thinner than motor oil) and has that tiny bit of shaft play back like when new instead of feeling all bound up.
Hopefully it was just coked up from cooking the little bit of oil that was in it on hot shut down after the engine failure. I guess I will see what is in the turbo oil drain hose when I get that off!
Weird that at no point did it ever feel "gritty".
your facts are off, he broke the front plate where the turbo oil feed line was, turbo seems to be fine, but clearly it wasn't a turbo failure issue that took out the motor
Originally Posted by BLUE TII @ RX7Club
Sad news from my garage.
I just started stripping down my TII and got to the turbo; the no play but the 7670 shaft takes some effort to spin now.
Turbo probably toast from when the front plate cracked right at the turbo oil feed passage.
After talking to a friend who had a similar experience of cranky turbo I put some Seafoam in the turbo oil feel and let it sit overnight and spun the turbo up while hosing WD40 into the turbo oil feel hose.
It spins better than when it was new (wd40 is thinner than motor oil) and has that tiny bit of shaft play back like when new instead of feeling all bound up.
Hopefully it was just coked up from cooking the little bit of oil that was in it on hot shut down after the engine failure. I guess I will see what is in the turbo oil drain hose when I get that off!
Weird that at no point did it ever feel "gritty".
#136
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not compared to old technology, but the main basis to my opinion is there's no need to go there, larger A/R on an otherwise all-else-being-equal turbo is always slower to respond, always ...
So you just say anything to get other people to believe what you want??? (just joking back atchya )
Detonation is always a possibility an any turbo system. The reasons why are endless ... got anything to offer other than speculation?
Detonation is always a possibility an any turbo system. The reasons why are endless ... got anything to offer other than speculation?
#137
I suspect that people will realise in time that the 8374 spoolup is so good that there is no reason to overspin a smaller turbo anyway and people will just stop using it .
Last edited by Brettus; 07-08-2015 at 12:26 AM.
#138
Driving my unreliable rx8
I'll be back mid spetember with a turbo rebuild also and I'm running.
#143
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vs 0.92
10 psi @ 2500
15 psi @ 2800
20 psi @ 3000
28 psi @ 3400
hit 22 psig @3050 rpm and 220 lb-ft output, compare to 3050 rpm for the 1.05 above that was shooting for 22 psi boost
frankly the 0.83 IWG non-divided would make more sense than the 1.05 IMO, especially on a street car shooting for 400 rwhp ...
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10 psi @ 2500
15 psi @ 2800
20 psi @ 3000
28 psi @ 3400
hit 22 psig @3050 rpm and 220 lb-ft output, compare to 3050 rpm for the 1.05 above that was shooting for 22 psi boost
frankly the 0.83 IWG non-divided would make more sense than the 1.05 IMO, especially on a street car shooting for 400 rwhp ...
.
Last edited by TeamRX8; 07-08-2015 at 08:22 PM.
#150
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I feel like you still don't fully get the AR vs turbine design vs engine requirement relationship
it's not just a 1.05, it's a T4 1.05, which is not the same as a T3 1.05. I can't see a 500+hp 2-rotor engine having sufficient wastegate control through the restricted siamese center port, but maybe I'm wrong.
Turblown had a good post in Hoss-05's thread about why a larger than normal (normal = piston engine) turbine wheel is a better fit on the rotary. Since you had participated in the discussion, you may have forgotten about it from several years ago ...
as for an EFR 7670, more than a few highly experienced turbo gurus think it's perfectly acceptable for up to 400 rwhp 2-rotor application. Their reasoning is that for a street/autox application the low rpm boost response is superior to the 8374 and they aren't running continuous WOT for long periods of time. As always, the right configuration and tune matters.
As you eluded to earlier, a T3 1.06 with a GT3582R is a known quantity. You won't have any real issues and should hit your goal fine *assuming* the 3rd-port wastegate deal works. That doesn't mean it couldn't have been improved on with a different compressor wheel and turbine housing. You are already risking on the manifold setup so it was reasonable to play it safe otherwise.
it's not just a 1.05, it's a T4 1.05, which is not the same as a T3 1.05. I can't see a 500+hp 2-rotor engine having sufficient wastegate control through the restricted siamese center port, but maybe I'm wrong.
Turblown had a good post in Hoss-05's thread about why a larger than normal (normal = piston engine) turbine wheel is a better fit on the rotary. Since you had participated in the discussion, you may have forgotten about it from several years ago ...
as for an EFR 7670, more than a few highly experienced turbo gurus think it's perfectly acceptable for up to 400 rwhp 2-rotor application. Their reasoning is that for a street/autox application the low rpm boost response is superior to the 8374 and they aren't running continuous WOT for long periods of time. As always, the right configuration and tune matters.
As you eluded to earlier, a T3 1.06 with a GT3582R is a known quantity. You won't have any real issues and should hit your goal fine *assuming* the 3rd-port wastegate deal works. That doesn't mean it couldn't have been improved on with a different compressor wheel and turbine housing. You are already risking on the manifold setup so it was reasonable to play it safe otherwise.