Show full size 924Board.org
Discussion Forum of 924.org
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 
 Technical FAQ924 FAQ (Technical)   Technical924 Technical Section   Jump to 924.org924.org   Jump to PCA 924 Registry924 Registry

Hyundai Twinscroll manifold and turbo

 
Post new topic   Reply to topic    924Board.org Forum Index -> Performance Upgrades
View previous topic :: View next topic  
Author Message
WEASEL149  



Joined: 19 Aug 2005
Posts: 595
Location: UK, Sheffield

PostPosted: Tue Oct 03, 2017 7:22 pm    Post subject: Hyundai Twinscroll manifold and turbo Reply with quote

Interesting report. No equal length pipes in sight either:-

http://articles.sae.org/9095/
_________________
1979 UK 932
Back to top
View user's profile Send private message
Raceboy  



Joined: 01 Mar 2004
Posts: 2326
Location: Estonia, Europe

PostPosted: Tue Oct 03, 2017 11:29 pm    Post subject: Reply with quote

This is because with twin-scroll having equal length is much less needed.
_________________
'83 924 2.6 16v Turbo, 470hp
'67 911 2.4S hotrod
'90 944 S2 Cabriolet
'78 924 Carrera GT replica
'84 928 S, sold
'91 944 S2, sold
'82 924S/931 "Gulf", sold
'84 924, turbocharged, sold.
http://www.facebook.com/vemsporsche
Back to top
View user's profile Send private message Visit poster's website MSN Messenger
Cedric  



Joined: 27 Aug 2004
Posts: 2600
Location: Sweden

PostPosted: Wed Oct 04, 2017 2:35 am    Post subject: Reply with quote

Its a pretty std setup for a oem turbo engine, minimize manifold volume is they key for pulse utilization, which maximizes available turbine power thus better fuel consumption and response. With vva and twinscroll you minimize cross talk /residual gases in the cylinders.
_________________
1980 924 Turbo
www.instagram.com/garagecedric/
Back to top
View user's profile Send private message MSN Messenger
Cedric  



Joined: 27 Aug 2004
Posts: 2600
Location: Sweden

PostPosted: Wed Oct 04, 2017 3:15 am    Post subject: Reply with quote

If you also optimize the turbine efficiency characteristics for higher pulse amplitudes, then things starts to get real good. These are things i do for a living, i wish i could share some plots but that would be bad. Manifold volume really is a key when it comes to response,
_________________
1980 924 Turbo
www.instagram.com/garagecedric/
Back to top
View user's profile Send private message MSN Messenger
Raceboy  



Joined: 01 Mar 2004
Posts: 2326
Location: Estonia, Europe

PostPosted: Wed Oct 04, 2017 4:26 am    Post subject: Reply with quote

Yes, for throttle response. Does not affect boost treshold though as much as twin-scroll and/or turbine size (and many-many other things like shaft+impeller mass etc-etc)
_________________
'83 924 2.6 16v Turbo, 470hp
'67 911 2.4S hotrod
'90 944 S2 Cabriolet
'78 924 Carrera GT replica
'84 928 S, sold
'91 944 S2, sold
'82 924S/931 "Gulf", sold
'84 924, turbocharged, sold.
http://www.facebook.com/vemsporsche
Back to top
View user's profile Send private message Visit poster's website MSN Messenger
morghen  



Joined: 21 Jan 2005
Posts: 8868
Location: Romania

PostPosted: Wed Oct 04, 2017 4:53 am    Post subject: Reply with quote


_________________
https://www.the924.com
Back to top
View user's profile Send private message Visit poster's website Yahoo Messenger MSN Messenger
WEASEL149  



Joined: 19 Aug 2005
Posts: 595
Location: UK, Sheffield

PostPosted: Wed Oct 04, 2017 5:04 am    Post subject: Reply with quote

The impressive part for me is the single piece casting of the twinscroll manifold/turbine housing in austenitic stainless.
_________________
1979 UK 932
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    924Board.org Forum Index -> Performance Upgrades All times are GMT + 10 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group