Boost Creepin' - Page 3 - Miata Turbo Forum - Boost cars, acquire cats.

DIY Turbo Discussion greddy on a 1.8? homebrew kit?
Sponsored by:
Sponsored by:

Boost Creepin'

Old 12-17-2014, 08:01 AM
  #41  
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 75,287
Total Cats: 2,153
Default

Originally Posted by nitrodann View Post
Enjoy your reduced performance.
That fact that you've somehow convinced yourself that's having less torque is quicker/better performance and that having more boost at redline is safer makes it even better.

seriously, why aren't you toying with Rotrex superchargers?
Braineack is offline  
Old 12-17-2014, 08:46 AM
  #42  
Elite Member
 
Join Date: Apr 2010
Location: Newcastle, Australia
Posts: 2,812
Total Cats: 51
Default

Do you genuinely not understand or am.I being trolled?
nitrodann is offline  
Old 12-17-2014, 08:58 AM
  #43  
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 75,287
Total Cats: 2,153
Default

No troll. I 100% completely understand how ridiculous you are. Otherwise I'd accuse you of trolling.
Braineack is offline  
Old 12-17-2014, 09:56 AM
  #44  
Elite Member
iTrader: (3)
 
concealer404's Avatar
 
Join Date: Aug 2011
Posts: 9,801
Total Cats: 1,368
Default

It's almost like you two are intentionally not actually reading what the two of you are posting.
concealer404 is online now  
Old 12-17-2014, 10:16 AM
  #45  
VladiTuned
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 35,078
Total Cats: 3,113
Default

Originally Posted by nitrodann View Post
There for in order to hover at a specific torque (240 for example) boost needs to steadily increase past 4500rpm by a few psi, I tend to see 16 or 17psi at redline on typical 2560 setups. Some might describe this as creep. Call it what you will.
That is not creep. That is a controlled ramp-up of boost to compensate for tapering airflow. Creep is something you can't control.

I know what you're saying though, I sometimes do the same
18psi is offline  
Old 12-17-2014, 10:22 AM
  #46  
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 75,287
Total Cats: 2,153
Default

Originally Posted by concealer404 View Post
It's almost like you two are intentionally not actually reading what the two of you are posting.
probably.

Braineack is offline  
Old 12-17-2014, 10:32 AM
  #47  
Miotta FTW!
iTrader: (24)
 
Splitime's Avatar
 
Join Date: Jun 2006
Location: Chicagoland, IL
Posts: 4,311
Total Cats: 30
Default

Reduced performance... what?

He'll get more out of it by having that boost on sooner vs taper up and having more power under the curve.

Power under the curve is the best thing about being able to tune a car. If you only want some peaky top end... BLEH.
Splitime is offline  
Old 12-17-2014, 10:46 AM
  #48  
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 75,287
Total Cats: 2,153
Default

Originally Posted by Splitime View Post
If you only want some peaky top end... BLEH.
Says the Honda boy.
Braineack is offline  
Old 12-17-2014, 10:47 AM
  #49  
Elite Member
iTrader: (3)
 
concealer404's Avatar
 
Join Date: Aug 2011
Posts: 9,801
Total Cats: 1,368
Default

Goddamnit.

He's saying hit your boost necessary to make your torque target, then taper up from there to keep the torque target from onset all the way to redline.

This gives you no less power anywhere, AND gives you more power up top.
concealer404 is online now  
Old 12-17-2014, 10:49 AM
  #50  
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 75,287
Total Cats: 2,153
Default

with the assumption that torque output alone, not cylinder pressure, bends rods.

I would agree that, in an ideal situation, I'd rather make 15psi at 3K, then increase boost to redline to keep the TQ from dropping--which really isn't that dramatic on our motors in the first place if you can size the turbo correctly.
Braineack is offline  
Old 12-17-2014, 10:53 AM
  #51  
Elite Member
iTrader: (3)
 
concealer404's Avatar
 
Join Date: Aug 2011
Posts: 9,801
Total Cats: 1,368
Default

Then you guys are in agreement. Don't make me knock your heads together.
concealer404 is online now  
Old 12-17-2014, 10:54 AM
  #52  
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 75,287
Total Cats: 2,153
Default

DO IT!
Braineack is offline  
Old 12-17-2014, 05:39 PM
  #53  
Elite Member
 
Join Date: Apr 2010
Location: Newcastle, Australia
Posts: 2,812
Total Cats: 51
Default

Originally Posted by Braineack View Post
with the assumption that torque output alone, not cylinder pressure, bends rods.

I would agree that, in an ideal situation, I'd rather make 15psi at 3K, then increase boost to redline to keep the TQ from dropping--which really isn't that dramatic on our motors in the first place if you can size the turbo correctly.
Ideal situation, like everyone with megasquirt and a mac valve?
nitrodann is offline  
Old 12-17-2014, 06:32 PM
  #54  
Miotta FTW!
iTrader: (24)
 
Splitime's Avatar
 
Join Date: Jun 2006
Location: Chicagoland, IL
Posts: 4,311
Total Cats: 30
Default

Originally Posted by Braineack View Post
Says the Honda boy.
Oh ho ho... ima get you.
Splitime is offline  
Old 12-19-2014, 09:04 AM
  #55  
Former Vendor
 
Join Date: Dec 2007
Location: Texas Hill Country
Posts: 271
Total Cats: 12
Default

SAV has the right idea in my view. Your set up is little different than the integral gate.

The right angle mounting of the gate places the valve/flow relationship square on the same geometry as the integral.

The gate should never be "like this." Again, no different than the integral, save a bigger valve. A bigger valve ain't the problem.

Turn the vent from the exhaust housing 90 degrees, leaning it directly outboard. Literally, bore a hole straight out from the inlet flange through the scroll as it begins to turn downward. Patch the present hole.

This puts the wastegate on a path with the centerline straight out from the manifold exit.

While doing that, check the valve seat on the gate, also.

corky
Corky Bell is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
StratoBlue1109
Miata parts for sale/trade
20
09-30-2018 02:09 PM
Full_Tilt_Boogie
Build Threads
63
08-09-2018 07:54 PM
LucaCarMods
Build Threads
11
02-14-2016 07:13 AM
Trent
WTB
2
10-01-2015 01:15 PM
shooterschmidty
Engine Performance
8
09-30-2015 11:28 PM


Thread Tools
Search this Thread
Quick Reply: Boost Creepin'


Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2018 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.