Well, Turbonetics told me to fuk myself
#21
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I don't know why the gt2860rs gets so much hate, its awesome on my car and i would not change the turbo in hindsight even on the old manifold.
#23
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I think 300whp is the ceiling for the .86 tater. The gt2860rs and the 2871 have the same hot side.
I made similar #'s and hit 16psi at 4200rpm on begi's cast manifold on a dynodynamics box.
I don't know why the gt2860rs gets so much hate, its awesome on my car and i would not change the turbo in hindsight even on the old manifold.
I made similar #'s and hit 16psi at 4200rpm on begi's cast manifold on a dynodynamics box.
I don't know why the gt2860rs gets so much hate, its awesome on my car and i would not change the turbo in hindsight even on the old manifold.
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yes, but I think that if you want 300whp on a real dyno you should get the 2871 or something else. 20psi/300whp is at the top of efficiency in this turbo. Then again, I may be there now at significantly less power than before with the new hot-parts.
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I forgot to inform everyone why I am rushing this so much. I have to have a decision in the morning.
I have a Pro Am event on the 16th. I need this car dyno'd and completely up to Formula Drift Spec. I am close, but there is still a decent amount of time for preperation. After I have the turbo it has to go on. See what other **** I have to change. Then get it tuned. So alot of **** for me..
Thats where I am at right now. I didnt plan on a 2nd turbo shitting out..
I have a Pro Am event on the 16th. I need this car dyno'd and completely up to Formula Drift Spec. I am close, but there is still a decent amount of time for preperation. After I have the turbo it has to go on. See what other **** I have to change. Then get it tuned. So alot of **** for me..
Thats where I am at right now. I didnt plan on a 2nd turbo shitting out..
#28
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2871 .64 is probably the simplest route to "tiny housings and aggressive wheels". but in this case I wouldn't call the housings tiny. this is a sub 2.0L motor remember.
I'm perfectly happy with my 2876 .64's ability to spool and have no question that it can produce 300 rwhp on a well tuned motor probably somewhere around 15 psi. sadly I have a high compression motor with a compromised tune so I will just wait for the next dyno day quietly now.
I'm perfectly happy with my 2876 .64's ability to spool and have no question that it can produce 300 rwhp on a well tuned motor probably somewhere around 15 psi. sadly I have a high compression motor with a compromised tune so I will just wait for the next dyno day quietly now.
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I think 300whp is the ceiling for the .86 tater. The gt2860rs and the 2871 have the same hot side.
I made similar #'s and hit 16psi at 4200rpm on begi's cast manifold on a dynodynamics box.
I don't know why the gt2860rs gets so much hate, its awesome on my car and i would not change the turbo in hindsight even on the old manifold.
I made similar #'s and hit 16psi at 4200rpm on begi's cast manifold on a dynodynamics box.
I don't know why the gt2860rs gets so much hate, its awesome on my car and i would not change the turbo in hindsight even on the old manifold.
I fear the hotside is restrictive, and I think Jeremy's comments and observations are probably accurate. His statements were made after returning home from a paid trip to california where he tuned a 2871 car. We have seen some oddball turbos that don't live up fully to their compressor map potential, and the 2871 may be one of them. The 3071 appears to be a better combination of wheels.
I think Andy Floyd showed this to us a few years ago, but no one paid attention to him, because he did it so goofy. If you recall, he had a 93 chassis with a cheap built 95 motor. The turbo was a 3271. His engine management consisted of the stock 93 electronics + a high pressure fuel pump + a pressure regulator + 330 injectors + a bipes. Sumbitch made 300 whp on a mustang, and his motor ran for years.
Turbo : GT3271 .78a/r hotside -- .50 a/r coldside
Manifold/DP : Log manifold w/ 2.5in DP
Exhaust : 3" enthuza w/ thermal muffler
I start making positive pressure around 3000rpm and have 7psi by 3500rpm. By the time Im at 3700rpm it starts really pulling and by 4300rpm or so in 3rd gear I have a full 16psi.
3000rpm = 1-2psi
3500rpm = 7psi
3700rpm = 10psi
3900rpm = 12psi
4100rpm = 14psi
4300rpm = 16-17psi
Thats on a 1.8L bored .40 over with a ported 95 head.
![](https://www.miataturbo.net/forum/attachments/2735d1164956129-16psi.jpg)
Manifold/DP : Log manifold w/ 2.5in DP
Exhaust : 3" enthuza w/ thermal muffler
I start making positive pressure around 3000rpm and have 7psi by 3500rpm. By the time Im at 3700rpm it starts really pulling and by 4300rpm or so in 3rd gear I have a full 16psi.
3000rpm = 1-2psi
3500rpm = 7psi
3700rpm = 10psi
3900rpm = 12psi
4100rpm = 14psi
4300rpm = 16-17psi
Thats on a 1.8L bored .40 over with a ported 95 head.
![](https://www.miataturbo.net/forum/attachments/2735d1164956129-16psi.jpg)
Can you imagine how much more power and better spool Andy would have made if he had a 99 head with o/s valves? With solid TEC engine management? With bad *** TEC ignition? With just a few psi more boost?
I think we need to spend more time looking at builds like what Andy, CCC, and Eliminator are doing. They are showing us that using small turbos is a mistake.
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dude you are drifting i would get the 3071 and be done with it. I doubt the 28xx series can support the torque you want and besides on the case of spool when you drift you can keep the motor above 4k anyway so with alil practice you should be good to go. But im partial to antiquated DSM turbos so i might just be talking out of my *** here.
#35
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They want you talking to their distributors. ATP wont talk to you about turbo sizing on the phone for some bullshit reason.
At this point I am thinking of just getting a 2871 with a .62 a/r and just spinning it at 20psi and see what happens.
I dont have time to get a custom jobber
dude you are drifting i would get the 3071 and be done with it. I doubt the 28xx series can support the torque you want and besides on the case of spool when you drift you can keep the motor above 4k anyway so with alil practice you should be good to go. But im partial to antiquated DSM turbos so i might just be talking out of my *** here.
I am trying to walk a better path. if this were a few years ago there would be a **** ton of china charger housing thrown through their **** box office windows..
#39
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call tial or a tial retailer. I bet you could call Twins Turbo and they'll talk to you, especially if you order a turbo through them. You can also try AMS, FP, or Alamo if you speak with Brice.