Took car to dyno today, have fuel issues - Page 3 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Prefabbed Turbo Kits A place to discuss prefabricated turbo kits on the market
Sponsored by:
Sponsored by:

Reply
 
 
 
LinkBack Thread Tools
Old 10-11-2008, 10:27 PM   #41
Senior Member
Thread Starter
iTrader: (4)
 
Join Date: Aug 2007
Location: Omaha, NE
Posts: 619
Total Cats: 0
Default

well the strange thing is the printout says I got up to almost 14 psi, but the video I posted of the same run only shows me getting a little over 12 psi. Strange. As for the psi range, I also heard that running over 12 is iffy with a stock NB engine. 2001 and up is worse because they have a higher compression ratio than the 99/00.

After driving around for a week with the new setup, I CAN'T WAIT for the new fuel pump. Every time I get into boost, I can watch my fuel gauge go down. Feels like when we used to have the SS Camaro... It is dumping in SO much fuel... Oh well, at least it is safe but I will have to pay to have it retuned when I put in the new fuel pump :(
posidon42 is offline   Reply With Quote
Old 10-23-2008, 01:10 AM   #42
Senior Member
Thread Starter
iTrader: (4)
 
Join Date: Aug 2007
Location: Omaha, NE
Posts: 619
Total Cats: 0
Default

Went back to the dyno today to have him do some more tuning. I REALLY need to get around to installing this fuel pump... According to the log, I am hitting 65-100% duty cycle to keep the AFR under control. So, I am going to install the new pump this weekend, and hopefully it will allow the injectors to do what they need to do.

The only other thing I see is that the boost is getting a LOT higher than I have it set for. The realtime display on my laptop shows it just touching 14psi then settling down to 12. According to this log, I am getting 16psi

Can you see any other issues I need to address?
Attached Images
File Type: jpg 10-20-08_1.jpg (84.3 KB, 52 views)
posidon42 is offline   Reply With Quote
Old 10-23-2008, 10:15 AM   #43
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,900
Total Cats: 1,793
Default

i saw the same thing on the dyno. the Dynojet software was reading exactly 1psi above what I was logging.
Braineack is offline   Reply With Quote
Old 10-23-2008, 10:11 PM   #44
Senior Member
Thread Starter
iTrader: (4)
 
Join Date: Aug 2007
Location: Omaha, NE
Posts: 619
Total Cats: 0
Default

This is a log from when I was driving home, not on the dyno. Is there a good way to get a power estimate from megalog viewer? I haven't played with it that much to know how to get calculated fields from a log file.
posidon42 is offline   Reply With Quote
Old 10-23-2008, 10:14 PM   #45
Senior Member
Thread Starter
iTrader: (4)
 
Join Date: Aug 2007
Location: Omaha, NE
Posts: 619
Total Cats: 0
Default

one more question: if I changed out the rear differential from a 4.3 to a 3.9, will the vehicle speed sensor be off? I haven't changed the speedo gear yet, so I assume it will be. I ask because I am trying to get an estimate of 0-60 times and I think I have to back calculate for a different indicated speed.
posidon42 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Obligation Joe Perez Current Events, News, Politics 118 11-30-2016 01:24 PM
FS/FT: 03.5 Mazdaspeed Protege leatherface24 Cars for sale/trade 15 10-16-2015 12:35 PM
Ms2e Not Syncing Dobzeh MEGAsquirt 2 09-10-2015 07:34 AM
Grinding into 5th and coasting shanesauce General Miata Chat 1 09-06-2015 09:47 PM
Ms2e Not syncing Help? ConnorSzcz ECUs and Tuning 0 09-04-2015 03:46 PM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 07:08 AM.