 DSM Boost Creep? |
 Sep 15 2004, 06:14 AM
Post
#1
|
|
 Person of Wisdom  Group: Members Posts: 190 Joined: 8-November 03 From: Washington DC Member No.: 197  |
Do DSMs get boost creep after opening up the exhaust? I know it's a constant issue with rotaries. How do you guys control it if it happens?
-------------------- Somebody make the pain stop. They won't let me go.
 |
 |
 
|
 |
Replies
|
Sep 15 2004, 03:38 PM
Post
#2
|
|
 Post Master Group: Members Posts: 626 Joined: 25-September 02 From: Urbana, IL Member No.: 19 |
MBC's (including the stock boost control) don't work all that well on the RX-7 TT when its still running in stock sequential mode. There's more than one wastegate to control in the system, so you can either hook the MBC to both of the wastegates and lose the entire sequential system, or you end up with a problem where the turbo with the MBC on it spikes. If the system spikes over stock boost at all, it runs into a leaner part of the fuel map, leading to higher EGTs, which is what typically contributes to the creep at high RPM. A really really good electronic controller will prevent this spike from happening in the first place.
Porting out the wastegate flappers wouldn't be a bad idea either though, I'm just saying the system is a lot more complicated than you guys are assuming. -------------------- Eric Wort
87 White Buick Turbo 'T' (11.71 @ 116.5, 1.61 60ft, slipping trans) 92 Teal Eagle Talon TSi AWD (burn victim) |
|
|
|
Posts in this topic
Larz DSM Boost Creep? Sep 15 2004, 06:14 AM
awd4kicks Boost creap is a comon issue with DSM's. The ... Sep 15 2004, 06:56 AM Larz Any of you just try electronic control, like a boo... Sep 15 2004, 09:19 AM natedogg The ebc should help with boost spikes, but like Ki... Sep 15 2004, 02:37 PM wortdog An electronic boost controller helped some with bo... Sep 15 2004, 02:43 PM KOU In3 EBC shouldn't matter if you are running a high... Sep 15 2004, 03:14 PM JMoushon Solved all my creep problems by porting the o2 hou... Sep 15 2004, 03:58 PM KOU In3 QUOTE (wortdog @ Sep 15 2004, 09:38 PM)MBC... Sep 15 2004, 04:19 PM Larz Whoa! Hey, just asking how DSMs do it and wh... Sep 16 2004, 05:42 AM Larz Is an external waste gate another workable solutio... Sep 16 2004, 09:25 AM Larz QUOTE (wortdog @ Sep 15 2004, 02:43 PM)An ele... Sep 16 2004, 09:27 AM
Justincredible yes. external wastegate is also a way to solve it... Sep 16 2004, 09:34 AM |
2 User(s) are reading this topic (2 Guests and 0 Anonymous Users)
0 Members:
| Lo-Fi Version | Time is now: 8th October 2025 - 10:49 PM |
Powered By IP.Board
© 2025 IPS, Inc.