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Journal to Ball Bearing turbo.
https://cimg7.ibsrv.net/gimg/www.evo...069ccf915f.jpg
Red line its the new turbo and blue old turbo. Hello guys, recently I change my blown turbo 6266 journal bearing to a ball bearing. I bought the turbo used, but the guy who sold, told me was journal and not. Its a ball bearing and hotside its not 66mm. According to PTE its a 68mm, so the turbo its 6268 supposedly. I made a datalog with the new turbo whithout tune and numbers are low than 6266 journal. Yes, I know, I need to retune the car, but if the turbo its bigger than the old one, without tune I expected better numbers than before with the same boost dont you think? The car its ok in afr with 27-28psi and zero knock. But I dont know right know if the turbo its ok or what. heres the dyno grahp. |
Originally Posted by Mauricio Evo IV
(Post 11807149)
https://cimg7.ibsrv.net/gimg/www.evo...069ccf915f.jpg
Red line its the new turbo and blue old turbo. Hello guys, recently I change my blown turbo 6266 journal bearing to a ball bearing. I bought the turbo used, but the guy who sold, told me was journal and not. Its a ball bearing and hotside its not 66mm. According to PTE its a 68mm, so the turbo its 6268 supposedly. I made a datalog with the new turbo whithout tune and numbers are low than 6266 journal. Yes, I know, I need to retune the car, but if the turbo its bigger than the old one, without tune I expected better numbers than before with the same boost dont you think? The car its ok in afr with 27-28psi and zero knock. But I dont know right know if the turbo its ok or what. heres the dyno grahp. Your tuned boost at top end from 66 opens your WG and limiting exhaust gas to spin 68 Turbine wheels. 68 is higher rotational mass than 66, a bit heavier to spin. |
Swapping turbos without a tune isn't going to do anything, really. It's pretty dangerous to drive it that way, so get 'er done!
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Is the new turbo making more or less boost than the old one?
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Originally Posted by letsgetthisdone
(Post 11807231)
Is the new turbo making more or less boost than the old one?
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Originally Posted by letsgetthisdone
(Post 11807231)
Is the new turbo making more or less boost than the old one?
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Originally Posted by maxroach
(Post 11807181)
Its a starvation of air (boost) at top end.
Your tuned boost at top end from 66 opens your WG and limiting exhaust gas to spin 68 Turbine wheels. 68 is higher rotational mass than 66, a bit heavier to spin. |
Originally Posted by Mauricio Evo IV
(Post 11807350)
Can you check my datalog???
Your 66/66 spools faster by 600 RPM. Ref blue circle. Wastegate open and cant keep the 66/68 turbo spool at your RPM Limit. Green Circle My safest suggestion is, Re-tune it to your set up. |
Originally Posted by maxroach
(Post 11807386)
https://cimg0.ibsrv.net/gimg/www.evo...0e0102a42e.jpg
Your 66/66 spools faster by 600 RPM. Ref blue circle. Wastegate open and cant keep the 66/68 turbo spool at your RPM Limit. Green Circle My safest suggestion is, Re-tune it to your set up. I will search a good tuner, because my tuner I think have a lot of work and cant help me.... Someone you can recommend to make some adjust in the tune? |
Originally Posted by Mauricio Evo IV
(Post 11807748)
Thanx man for your suggestion.
I will search a good tuner, because my tuner I think have a lot of work and cant help me.... Someone you can recommend to make some adjust in the tune? What wastegate are you running? |
Originally Posted by maxroach
(Post 11808011)
Where are you located?
What wastegate are you running? |
Alright. Try this, order another spring for your Tial WG. Spring should Be next higher compression than what your using now in Tial. |
Originally Posted by maxroach
(Post 11808467)
Alright. Try this, order another spring for your Tial WG. Spring should Be next higher compression than what your using now in Tial. |
Originally Posted by Mauricio Evo IV
(Post 11808574)
Im using a mix spring. Without boost (boost controller close) the car boost 28 psi.
Problem is, When you hit 28 psi on your boost, the WG is fully open already. Exhaust gas losses energy to spool the Turbine Wheel. You need to have higher compression spring to control your WG until 7000 - 7200 RPM. |
Originally Posted by maxroach
(Post 11808636)
You don't have a problem with your boost. Boost is fine.
Problem is, When you hit 28 psi on your boost, the WG is fully open already. Exhaust gas losses energy to spool the Turbine Wheel. You need to have higher compression spring to control your WG until 7000 - 7200 RPM. If I run the car like this, is there a problem? The car not detected knock and afr its ok for the gas that use + methanol. I think run more boost (33-34 psi) with Q16 or Torco 118 octane... and I have the tune with more gas and timing |
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