New BW EFR Turbo Thread
Feb 17, 2012, 09:33 PM
#1460
Feb 17, 2012, 11:41 PM
#1462
It's going to take another 100+ HP to get any kind of internal wastegate type "record."
Kind of seems odd to be after a "record" like that when making the claim that this wastegate setup is perfectly capable though.
I'm very interested in seeing the max power stuff though, these internal divided housings look pretty awesome. Hope to see the flapper not be a limiting issue though.
Kind of seems odd to be after a "record" like that when making the claim that this wastegate setup is perfectly capable though.
I'm very interested in seeing the max power stuff though, these internal divided housings look pretty awesome. Hope to see the flapper not be a limiting issue though.
Feb 18, 2012, 07:43 AM
#1463
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Not sure how I missed that it was an EFR8374. Holy crap. That's ... phenomenal.Geoff, any plans to bolt-on an EFR7670 for a back-to-back comparo?
l8r)
Feb 18, 2012, 09:00 AM
#1466
i have a lot of plans for this setup, but none involve putting a smaller turbo on... the 8374 is the turbo for me (At least for a little while) finishing up my first vid right now on the speed sensor setup, with a little in-car video of the speed sensor gauge during a short pull. Ive got some work to do this weekend! I want to be on the road course at bondurant next week - nothing like shakedowns on the circuit
edit: ive been beyond happy every time i drive the car - huge thanks to john @ tre for the buttery trans, kiggly's HLA is amazing (my catchcan doesnt fill up at all!) chris moore is sending me a couple updates to the map too so i will try them out today. still need to beat the fenders more and make my wheels fit better. carbonetics clutch is awesome
edit: ive been beyond happy every time i drive the car - huge thanks to john @ tre for the buttery trans, kiggly's HLA is amazing (my catchcan doesnt fill up at all!) chris moore is sending me a couple updates to the map too so i will try them out today. still need to beat the fenders more and make my wheels fit better. carbonetics clutch is awesome
Last edited by Geoff Raicer; Feb 18, 2012 at 09:17 AM.
Feb 18, 2012, 12:37 PM
#1470
Evolving Member
Question about the bearings:
Are the inner races (2 parts) an interference fit (press fit) onto the shaft?
What I'm thinking about is, what are the chances that they could actually move slightly on the shaft during use, thereby messing up the bearing preload/clearance?
On the other hand, if they are locked down tight to the shaft, then they would follow the shaft axially - thermal expansion and contraction wise. If there was ever much of a temperature difference between the shaft and the outer bearing race - then again there would be a bearing preload/clearance problem. Assuming the shaft temporarily hotter than the outer race, the bearings would temporarily be too loose.
Here's a pic of the inner races (2 parts) from the EFR video:
[IMG]
[/IMG]
Are the inner races (2 parts) an interference fit (press fit) onto the shaft?
What I'm thinking about is, what are the chances that they could actually move slightly on the shaft during use, thereby messing up the bearing preload/clearance?
On the other hand, if they are locked down tight to the shaft, then they would follow the shaft axially - thermal expansion and contraction wise. If there was ever much of a temperature difference between the shaft and the outer bearing race - then again there would be a bearing preload/clearance problem. Assuming the shaft temporarily hotter than the outer race, the bearings would temporarily be too loose.
Here's a pic of the inner races (2 parts) from the EFR video:
[IMG]
[/IMG]
Last edited by Talonboost; Nov 5, 2017 at 01:36 AM.