turboed sc eng
#1
Senior Member
Certified GM nut
Thread Starter
Join Date: Oct 2006
Location: burb of detroit. 2 miles north of 8 mile Rd.
Posts: 2,028
Likes: 0
Received 1 Like
on
1 Post
turboed sc eng
i know im not the first one to think of the concept of having both a turbo and a sc. but, has any one successfully done it?
#2
Senior Member
Posts like a Turbo
Join Date: Aug 2005
Location: Grand Rapids,MI
Posts: 226
Likes: 0
Received 0 Likes
on
0 Posts
zoom'* car ran 9'* on a twin charged setup.....I don't know why you would want to twin charge with todays turbo technology but to each his own.
#3
Re: turboed sc eng
Originally Posted by samueljackson
i know im not the first one to think of the concept of having both a turbo and a sc. but, has any one successfully done it?
well its been talked about, and If i recall it is better to just gut the SC and have turbo only
Willwren is planning on doing this to his car unless plans have changed, he would be able to fill you in alittle better once he sees this thread (he'* donr lots of research on the matter)
#4
Junior Member
Posts like a Ricer Type-R
Yes, it'* been done. In fact, GM has produced it in one unit on a commercial vehicle in the last 50 years. See if you can find it.
ADTR and I were seriously discussing doing this to my SSEi nearly 4 years ago.
ADTR and I were seriously discussing doing this to my SSEi nearly 4 years ago.
#5
Senior Member
True Car Nut
Join Date: Jul 2006
Location: Granville, Ohio ~NEBF '07 Survivor~
Posts: 5,001
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by willwren
ADTR and I were seriously discussing doing this to my SSEi nearly 4 years ago.
#6
Senior Member
Posts like a Supercharger
Join Date: Jun 2006
Location: Moon of meepsorp
Posts: 183
Likes: 0
Received 0 Likes
on
0 Posts
Someone made this comment that I saw on another web site:
This may be a miles off topic, but the best solution to all these turbo problems with todays technology, seems to be to combine a turbo with a positive displacement supercharger, (with the compressors simply run in series). This has now been succesfully done on three mass produced production engines.
Nissan did it with the March, a small hatchback not sold outside Japan, it combined a Garret turbo with a roots blower.
Lancia did it with the Delta S4, again a KKK turbo with a roots blower, and two intercoolers.
VW are doing it right now with the Golf GTI hatchback just released in Europe this year.
I built an experimental system like this myself over fifteen years ago, the results were exceptionally good in all respects. The corporate bean counters are probably the only real obstacle to overcome, otherwise I am sure many more forced induction production engines would now be using this system.
It combines lag free low end torque, with high top end airflow. The advantages of being able to keep boost pressure just above exaust back pressure should not be overlooked. The torque curve can be made any shape you wish to make it, and it is relatively simple. Initial cost is the only real disadvantage.
This may be a miles off topic, but the best solution to all these turbo problems with todays technology, seems to be to combine a turbo with a positive displacement supercharger, (with the compressors simply run in series). This has now been succesfully done on three mass produced production engines.
Nissan did it with the March, a small hatchback not sold outside Japan, it combined a Garret turbo with a roots blower.
Lancia did it with the Delta S4, again a KKK turbo with a roots blower, and two intercoolers.
VW are doing it right now with the Golf GTI hatchback just released in Europe this year.
I built an experimental system like this myself over fifteen years ago, the results were exceptionally good in all respects. The corporate bean counters are probably the only real obstacle to overcome, otherwise I am sure many more forced induction production engines would now be using this system.
It combines lag free low end torque, with high top end airflow. The advantages of being able to keep boost pressure just above exaust back pressure should not be overlooked. The torque curve can be made any shape you wish to make it, and it is relatively simple. Initial cost is the only real disadvantage.
#10
Senior Member
Posts like a Supercharger
Join Date: May 2006
Location: Vancouver
Posts: 160
Likes: 0
Received 0 Likes
on
0 Posts
Well at low RPMs, you have boost from the SC and at higher RPMs, more effective boost with less robbing of engine power because the SC hardly sets any resistance to the engine belt drive when receiving boost from the exhaust gases.