Sequential turbos
 

do Sequential turbos spool together or does one kick later then the other

One turbo spools, then the second one kicks in at 4,500 rpms. This is the why there is a "dip" in the boost pattern. (10-8-10) With a non-sequential setup, both turbos spool together.

-Alex

what would cause the second one not to kick in?

There's a million and a half reasons why the second one may not kick in. Are you having a problem with the second turbo not kicking in?!

Oh, try searching next time! ;)

-Alex

gee i guess thats why i asked
oh yea i forgot to search again oops you Arrogant ...
thanks for your help

just give me the first couple hundred reasons

Maybe you could start by telling us what's going on you jackass. :rolleyes: How the hell are we supposed to help you when all you ask is how the sequential system works?

Oh, BTW, learn how to search. ;)

-Alex

All you need to and more.....

http://www.autosportracetech.com/RX-...leshooting.htm
http://rx7.voodoobox.net/howto/solen...oid_check.html

In case you're curious how the system is supposed to work...

http://davidgeesaman.com/rx7/TwinTurbo.PDF

http://davidgeesaman.com/rx7/Mazda_S...ual_Turbos.PDF

Where I would look, in order:
- Tear in intake hose coupling (between the turbos and intake elbow) - remove each and turn inside out, looking for a small leak
- System holds vacuum and pressure without leaking
- Correct vacuum and pressure going to the TCA at exactly 4500rpm
- CCA opening at 4500rpm

If you don't have a pressure and vacuum Mityvac tool, now is the time to buy one.

Dave

thanks