BBK-3B - my new favorite turbo
Apr 4, 2014, 07:40 AM
#64
Only sometimes. 
However, I am pretty happy with this turbo, so for the time being it will just be tinkering with different bolt-ons.
Its pretty much identical to the Full. Both have great off-boost responsiveness and power, but need a good DV/BOV to effectively deal with part throttle partial lift. The anti-surge cover on the Green hurt the off-boost responsiveness as well as making it feel a bit underpowered off boost, but the anti-surge cover on the Green shines in part throttle partial lift. There was almost no stutter with that turbo.
However, I am pretty happy with this turbo, so for the time being it will just be tinkering with different bolt-ons.Its pretty much identical to the Full. Both have great off-boost responsiveness and power, but need a good DV/BOV to effectively deal with part throttle partial lift. The anti-surge cover on the Green hurt the off-boost responsiveness as well as making it feel a bit underpowered off boost, but the anti-surge cover on the Green shines in part throttle partial lift. There was almost no stutter with that turbo.
Apr 4, 2014, 08:37 AM
#67
Its pretty much identical to the Full. Both have great off-boost responsiveness and power, but need a good DV/BOV to effectively deal with part throttle partial lift. The anti-surge cover on the Green hurt the off-boost responsiveness as well as making it feel a bit underpowered off boost, but the anti-surge cover on the Green shines in part throttle partial lift. There was almost no stutter with that turbo.
Apr 4, 2014, 12:56 PM
#68
Its pretty much identical to the Full. Both have great off-boost responsiveness and power, but need a good DV/BOV to effectively deal with part throttle partial lift. The anti-surge cover on the Green hurt the off-boost responsiveness as well as making it feel a bit underpowered off boost, but the anti-surge cover on the Green shines in part throttle partial lift. There was almost no stutter with that turbo.
Edit: found the thread and it was about 200 rpm slower. post 63 has the dynograph before and after
https://www.evolutionm.net/forums/ev...ing-plano.html
Last edited by 94AWDcoupe; Apr 8, 2014 at 11:33 AM.
Apr 4, 2014, 01:44 PM
#69
This is good to hear. there isnt a whole lot of good info on what the anti-surge cover does other than help stop surge. I have only seen one reliable back to back with only the cover changed. someone on the evo x forums tested both covers on EF3 and the results were surprising. the anti-surge cover clearly spooled 250 rpm slower. thats a pretty good chunk.
When I spoke to Chad he told me that the anti surge cover definitely robs a few hp and slows spool.
First I heard anything about the anti surge cover hampering performance but interesting to know.
Apr 8, 2014, 03:00 PM
#74
With the way that the anti-surge cover softened surge, it definitely felt like it was also affecting off-boost performance, but there are other differences between the two turbos that I suppose could have affected the off-boost performance. I may try to summarize those differences tomorrow when I have some time.
Last edited by mrfred; Apr 8, 2014 at 03:02 PM.
Apr 8, 2014, 03:32 PM
#75
Does the bbk-b bb turbo come with surge ports?
if not, have you been able to generate any surge with the bbk-b bb?
fwiw, i can generate some surge on my hta grn, if i experience such, i just dial down my pcduty in the area of concern for my ebc & problem is solved.
I would imagine such is the same if experienced with a basic bbk.
if the response is similar between the bbk-b bb vs the jb bbk, then maybe the bbk-b bb is the turbo for me...
if not, have you been able to generate any surge with the bbk-b bb?
fwiw, i can generate some surge on my hta grn, if i experience such, i just dial down my pcduty in the area of concern for my ebc & problem is solved.
I would imagine such is the same if experienced with a basic bbk.
if the response is similar between the bbk-b bb vs the jb bbk, then maybe the bbk-b bb is the turbo for me...