DIY Turbo Discussion greddy on a 1.8? homebrew kit?

I overspooled my turbo, can I run at zero boost?

Thread Tools
 
Search this Thread
 
Old 07-03-2008, 02:36 PM
  #1  
Junior Member
Thread Starter
 
fluke's Avatar
 
Join Date: Jan 2006
Location: Toronto
Posts: 181
Total Cats: 0
Default I overspooled my turbo, can I run at zero boost?

Like the title says, I learned what overspool is the hard way, my radial bearings are fried since I've been breaking in and testing the rebuilt motor w/ the turbo venting to atmosphere and all exhaust flow going to turbo. It took ~60miles. :(

I don't have megasquirt running yet, and want to run "safely" at zero boost since I assume that the stock computer won't deal w/ boost.

So, I'm rebuilding the turbo again, once that's done will it be safe to run with:
-Wastegate spring taken out (Tial external wastegate)
-Turbo (TD05 16G) lines and tubes all connected (oil, water, compressor, turbine)
-Stock air filter, MAF sensor, and IAT bolted to inlet of compressor
fluke is offline  
Old 07-03-2008, 02:54 PM
  #2  
Boost Czar
iTrader: (62)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,501
Total Cats: 4,080
Default

it might be easier to pull the turbo out of the tubine housing and bolt a block off plate there instead.

otherwise the turbo, even can still make a few pounds of boost.

also, you've idled and drawn vacuum out of the motor....it's broken in.
Braineack is offline  
Old 07-03-2008, 02:57 PM
  #3  
Junior Member
iTrader: (1)
 
Duckie_uk's Avatar
 
Join Date: Apr 2008
Location: Bristol
Posts: 439
Total Cats: 0
Default

Damn brain too fast for me. What he said^
Duckie_uk is offline  
Old 07-03-2008, 03:09 PM
  #4  
Elite Member
iTrader: (5)
 
m2cupcar's Avatar
 
Join Date: Jan 2005
Location: Atlanta
Posts: 7,486
Total Cats: 372
Default

m2cupcar is offline  
Old 07-03-2008, 03:26 PM
  #5  
y8s
2 Props,3 Dildos,& 1 Cat
iTrader: (8)
 
y8s's Avatar
 
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,338
Total Cats: 573
Default

wiggity what? people run like that?

this is why I keep a spare 4-into-1 header in the garage. oh, wait. i have no garage :(
y8s is offline  
Old 07-03-2008, 03:28 PM
  #6  
Elite Member
iTrader: (39)
 
Zabac's Avatar
 
Join Date: Sep 2007
Location: High Point NC
Posts: 4,850
Total Cats: 8
Default

m2cupcar-NA intercooled, half turbo miata, noice
Zabac is offline  
Old 07-03-2008, 03:39 PM
  #7  
I'm Miserable!
iTrader: (1)
 
SloS13's Avatar
 
Join Date: Oct 2005
Location: Columbia, SC
Posts: 853
Total Cats: 1
Default

First....there was the interfooler now this.
SloS13 is offline  
Old 07-03-2008, 04:12 PM
  #8  
Elite Member
iTrader: (5)
 
m2cupcar's Avatar
 
Join Date: Jan 2005
Location: Atlanta
Posts: 7,486
Total Cats: 372
Default

I did when my turbine blade came apart. It wasn't too bad like that (OE rated ~145chp/ftlbs.) - a little weak on the top end... choke, choke, choke.
m2cupcar is offline  
Old 07-03-2008, 04:37 PM
  #9  
Junior Member
Thread Starter
 
fluke's Avatar
 
Join Date: Jan 2006
Location: Toronto
Posts: 181
Total Cats: 0
Default

Originally Posted by Duckie_uk
Damn brain too fast for me. What he said^
Anyone know if the stock ECU can handle a couple psi? The MAF is on the inlet side of the compressor and I have a huge *** intercooler.

Isn't the worst case that AIT is higher than the the ECU reads (since it's before the compressor) and adds a bit too much fuel?
fluke is offline  
Old 07-03-2008, 05:15 PM
  #10  
Junior Member
iTrader: (1)
 
Duckie_uk's Avatar
 
Join Date: Apr 2008
Location: Bristol
Posts: 439
Total Cats: 0
Default

I assume you have a WBO2 meter if you have a turbo, connected or not. Keep an eye on the AFR if it leans out because you develop boost then ease off and stop.
Duckie_uk is offline  
Old 07-03-2008, 06:12 PM
  #11  
Junior Member
Thread Starter
 
fluke's Avatar
 
Join Date: Jan 2006
Location: Toronto
Posts: 181
Total Cats: 0
Default

Originally Posted by Duckie_uk
I assume you have a WBO2 meter if you have a turbo, connected or not. Keep an eye on the AFR if it leans out because you develop boost then ease off and stop.
Ok, I'll do that. What's AFR is too lean?
fluke is offline  
Old 07-03-2008, 06:31 PM
  #12  
Junior Member
iTrader: (6)
 
99NBMia's Avatar
 
Join Date: Oct 2007
Location: So Cal
Posts: 322
Total Cats: 0
Default

Originally Posted by fluke
Ok, I'll do that. What's AFR is too lean?
I would think as long as you stay under 13 with just a few pounds you will be fine.
99NBMia is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
stefanst
DIY Turbo Discussion
44
09-28-2015 07:16 PM
elior77
MEGAsquirt
30
09-23-2015 06:38 PM
Itty
MSPNP
6
09-22-2015 11:02 AM
SuperSneakySecretSquirrel
Meet and Greet
5
09-06-2015 08:30 PM



Quick Reply: I overspooled my turbo, can I run at zero boost?



All times are GMT -4. The time now is 07:06 AM.