MEGAsquirt A place to collectively sort out this megasquirt gizmo

Anyone else have Boost spikes with EBC hooked up?

Thread Tools
 
Search this Thread
 
Old 11-28-2007 | 03:19 PM
  #1  
krayzrac3r's Avatar
Thread Starter
Guest
 
Joined: Mar 2006
Posts: 407
Total Cats: 0
From: So Cal
Default Anyone else have Boost spikes with EBC hooked up?

EBC is hooked up and working fine however my boost is weird. 1st thru 3rd i spike up to maybe 12-13 then hold 8-9psi. 4th and 5th gear i spike 14-15 and hold 12-13psi. I get full boost by 4500RPM and im pretty sure my muffler is whats restricting me (obx muffler) but does anyone else have this issue also? I dont know if im asking for too much or not but i want to boost about 11-12psi 1st thru 3rd and 13-14 psi 4th and 5th.
Old 11-28-2007 | 07:20 PM
  #2  
krayzrac3r's Avatar
Thread Starter
Guest
 
Joined: Mar 2006
Posts: 407
Total Cats: 0
From: So Cal
Default

so im the only one with spikesss? haha
Old 11-28-2007 | 07:28 PM
  #3  
neogenesis2004's Avatar
Elite Member
iTrader: (12)
 
Joined: Aug 2006
Posts: 4,413
Total Cats: 20
Default

Its spiking because you are overshooting when it ramps up. You just need to work on your ebc map to correct the overshoot out. PNP doesnt mean PND (plug and drive)
Old 11-28-2007 | 07:28 PM
  #4  
cjernigan's Avatar
Elite Member
iTrader: (13)
 
Joined: Oct 2006
Posts: 8,091
Total Cats: 7
From: Atlanta, GA
Default

Part of the beauty of EBC is you should be able to tune out any spikes like that. What does your EBC duty map look like? Screenshot is fine.
You want it to build boost as fast as possible then smoothly hold the max boost you tune it for.
Old 11-28-2007 | 07:31 PM
  #5  
krayzrac3r's Avatar
Thread Starter
Guest
 
Joined: Mar 2006
Posts: 407
Total Cats: 0
From: So Cal
Default

I spent 30 minutes on the highway with a buddy last night trying to fix this and that was the best i could do. ill get a screen shot in about an hr when i get home for you guys to take a look at.
Old 11-28-2007 | 09:02 PM
  #6  
krayzrac3r's Avatar
Thread Starter
Guest
 
Joined: Mar 2006
Posts: 407
Total Cats: 0
From: So Cal
Default

Just got
boost controller parameters settings

http://upload.imgspot.com/u/07/331/1...parameters.JPG

Boost duty target settings

http://upload.imgspot.com/u/07/331/1...dutytarget.JPG

Boost KPA Target Settings

http://upload.imgspot.com/u/07/331/1...kpatargets.JPG
Old 11-28-2007 | 09:25 PM
  #7  
FoundSoul's Avatar
Supporting Vendor
iTrader: (5)
 
Joined: Jun 2006
Posts: 803
Total Cats: 0
From: Duluth, GA 30097
Default

How about a datalog from a long pull-- from well before boost onset on up. I need to see manifold pressure versus BCduty in the logs.

It definitely shouldn't be 'spikey' at all. Relatively smooth actually. Though it looks like you're using my scaling on your DC table, which may not match how your turbo spools very well. I'll be able to see this in your logs...
__________________
Jerry a.k.a. 'FoundSoul'
DIYAutoTune.com
'91 Miata BEGi S3 GT2560 w/ MSPNP - 14.1psi - 253whp, 232wtq
'95 Miata n/a
A few other cars....
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Full_Tilt_Boogie
Build Threads
84
04-12-2021 05:21 PM
bigmackloud
Miata parts for sale/trade
19
01-08-2021 12:24 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




All times are GMT -4. The time now is 04:16 AM.