|
|
01-10-2006, 07:11 PM
|
#1 |
|
500whp yet?
Join Date: Nov 2005
Location: Mechanicsville, MD, US of A, 20659
Posts: 1,060
 |
here something to think about. a turbo runs off of exhaust and when the car is started, no exhaust yet but the engine needs air to run. so the engine will suck in air creating a vaccum, thus reading neg boost. once its running and pushing out exhaust making the turbo spin, the gauge will read positive pressure
__________________
88 N/A w/ 5spd - stock - not running, bhg 87 turbo/targa w/ 5spd- fidanza light weight flywheel, new oem slave cylinder, apexi air filter, no ac and no heat |
|
|
|
01-10-2006, 09:40 PM
|
#2 |
|
3" Exhaust
Join Date: Dec 2005
Location: Houston, Tx
Posts: 83
|
well, what about when the car is reved up? My trubo guage does not read uno matter how long you hold the gas down. It only reads when I am going.
__________________
Supra Project 06... 1987 Turbo. 18" Enkei RS5. K&N Filter. Magnaflow custom exhaust. "I got a pair of subs for my girlfriend...Good traid huh?!  
|
|
|
|
|
01-10-2006, 10:11 PM
|
#3 |
|
500whp yet?
Join Date: Nov 2005
Location: Long branch, NJ
Posts: 1,006
|
pretty much any turbo car should be pulling vaccum at idle...even cruising at low rpms. ive never ridden in a turbo supra but in a grand national it would hardly get to boost...unless he hit the gas kinda hard. would get to about 0 at normal aceleration. and vaccum while cruising. My car also has that waterfall sound...im guessing thats air trapped in the heater core?
|
|
|
|
|
01-11-2006, 12:30 AM
|
#4 |
|
7M POWAH! ;)
Join Date: Jun 2004
Location: New Zealand
Posts: 2,312
|
ahh there's one thing i forgot... what measurement is your vacuum gauge in?
and yes.. burp your car too 
__________________
Please use the forum to ask your questions as they will get replied to much faster than pming me Pics of my build. "Good girls are just bad girls that don't get caught" Do a diagnostic first! |
|
|
|
|
01-12-2006, 03:27 AM
|
#5 |
|
3" Exhaust
Join Date: Dec 2005
Location: Houston, Tx
Posts: 83
|
The boost guage reads negitive 4, then 0, then a midway line, then +8. That's it. I tried to figure out how to post a pic, but having trouble.
__________________
Supra Project 06... 1987 Turbo. 18" Enkei RS5. K&N Filter. Magnaflow custom exhaust. "I got a pair of subs for my girlfriend...Good traid huh?!
|
|
|
|
|
01-12-2006, 11:08 PM
|
#6 |
|
7M POWAH! ;)
Join Date: Jun 2004
Location: New Zealand
Posts: 2,312
|
ohhhhhhhhhhhh the stock gauge lol
quite normal  get an aftermarket boost gauge with vacuum... it's extremely helpful in telling you plenty of things... as with my previous post linked to cygnusx1 page
__________________
Please use the forum to ask your questions as they will get replied to much faster than pming me Pics of my build. "Good girls are just bad girls that don't get caught" Do a diagnostic first! |
|
|
|
 |
|
|
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| HELP PLEASE | Nick0887 | Non-Generation Specific Questions | 4 | 02-28-2009 07:26 AM |
| Mk3 Turbo Problems | NicolasDwolfwood | MKIII Supra | 20 | 05-13-2008 10:48 PM |
| Help...Turbo Problems | Supra_87_mk3 | MKIII Supra | 3 | 11-10-2007 07:51 AM |
| Dream Offer | Karma_Supra | MKIV Supra | 22 | 10-17-2007 03:04 PM |
| Sequential Turbo Question | suprapoweredsoarer | MKIV Supra | 1 | 06-06-2006 12:13 AM |
Hybrid Mode
