The newest 100% bolt on Greddy Hybrid turbocharger!
#627
Turbocharger Guru
Thread Starter
/\ totally agree with you on the experience thing - it's almost like it's a must to be doing your own mechanical work and problem solving (and be good at it) on these things to get a decent result .
My oil cool Greddy has lasted 24000kms so far - it was built using 360 degree thrust brgs . I think that is helping a lot .
My oil cool Greddy has lasted 24000kms so far - it was built using 360 degree thrust brgs . I think that is helping a lot .
#628
Turbocharger Guru
Thread Starter
I installed an additional spring to the greddy wastegate actuator on a turbocharger ordered recently.
Without the spring the rod would start to move at 7 psi. When I put the additional spring on with the rod on its factory setting, I got 12 psi out of the base setting. If you adjusted the rod length to be shorter, I got the rod to move at 16 psi! So now we have a very easy solution to turn the boost up and the rod travel is normal!
Without the spring the rod would start to move at 7 psi. When I put the additional spring on with the rod on its factory setting, I got 12 psi out of the base setting. If you adjusted the rod length to be shorter, I got the rod to move at 16 psi! So now we have a very easy solution to turn the boost up and the rod travel is normal!
#630
Boosted Kiwi
iTrader: (2)
I installed an additional spring to the greddy wastegate actuator on a turbocharger ordered recently.
Without the spring the rod would start to move at 7 psi. When I put the additional spring on with the rod on its factory setting, I got 12 psi out of the base setting. If you adjusted the rod length to be shorter, I got the rod to move at 16 psi! So now we have a very easy solution to turn the boost up and the rod travel is normal!
Without the spring the rod would start to move at 7 psi. When I put the additional spring on with the rod on its factory setting, I got 12 psi out of the base setting. If you adjusted the rod length to be shorter, I got the rod to move at 16 psi! So now we have a very easy solution to turn the boost up and the rod travel is normal!
Seems to work well . I get 10psi consistently to about 6000 after which the boost drops away to 7.5 by 7500 .
Have not tried playing with arm adjustment with it like this .
#632
Turbocharger Guru
Thread Starter
The top end will also change because I am using a 11 blade TD06H wheel that has a casted clip. Less back pressure will make the wastegate act differently as well.
Bryan@BNR
205 640 1193
#636
Boosted Kiwi
iTrader: (2)
I don't think anyone has dynoed over 300 yet with this after more than a yr . There were reports of someone making 332whp after tweaking the WG shut but no dyno was ever posted .
We know it SHOULD do well over that but it has not yet been done . Gregs has been the most persistent of the users so far and has spent a lot of time on getting boost control sorted . I'm 90% sure that this can be overcome but there is still a nagging feeling that perhaps the compressor is too big for the housing/turbine combo . Possibly the 48lb 50 trim T04e (as mentioned in the 1st post)is a better upgrade to the Greddy for us to recommend to people ?
We know it SHOULD do well over that but it has not yet been done . Gregs has been the most persistent of the users so far and has spent a lot of time on getting boost control sorted . I'm 90% sure that this can be overcome but there is still a nagging feeling that perhaps the compressor is too big for the housing/turbine combo . Possibly the 48lb 50 trim T04e (as mentioned in the 1st post)is a better upgrade to the Greddy for us to recommend to people ?
#637
Banned
iTrader: (3)
I've had a few of these on the dyno and none of them have produced more than 30 - 50 g/sec flow over the regular GReddy turbo.
The turbine is spinning at similar speeds, so I don't think its the compressor being too big, especially on a rotary.
I've gone up 2 wheel sizes on the GT3071 (76mm and 82mm) with no appreciable slow-down of the turbine. (Those are all 56 trim wheels, BTW.)
The turbine is spinning at similar speeds, so I don't think its the compressor being too big, especially on a rotary.
I've gone up 2 wheel sizes on the GT3071 (76mm and 82mm) with no appreciable slow-down of the turbine. (Those are all 56 trim wheels, BTW.)
#640
Boosted Kiwi
iTrader: (2)
Pretty sure that casting is way less than 2" at the bend but tapers out somewhat towards the exit .
Anyway : there must be a point at which the compressor wheel is too big for the overall package and i'm just raising the possibility that this upgrade may well be at that point given the difficulty people seem to be having in getting expected results ....
Anyway : there must be a point at which the compressor wheel is too big for the overall package and i'm just raising the possibility that this upgrade may well be at that point given the difficulty people seem to be having in getting expected results ....
#648
Banned
iTrader: (3)
How do you figure that?
They are both in the 76% - 78% range and 28 lbs at a Pr of 2.
They both run out of "puff (at 65%) at 40 pounds or so.
The small variations at the outsides of the islands are exceeded by the statistical variation.
In any event, the 71mm Garrett wheel is the small one.
The wheel you should be using for comparison is the 82mm compressor.
They are both in the 76% - 78% range and 28 lbs at a Pr of 2.
They both run out of "puff (at 65%) at 40 pounds or so.
The small variations at the outsides of the islands are exceeded by the statistical variation.
In any event, the 71mm Garrett wheel is the small one.
The wheel you should be using for comparison is the 82mm compressor.
Last edited by MazdaManiac; 05-12-2010 at 09:09 PM.