Single Turbo RX-7's Questions about all aspects of single turbo setups.

Idea to spool turbos faster?

Thread Tools
 
Search this Thread
 
Old 05-23-02, 10:45 AM
  #1  
On a long vacation

Thread Starter
 
13BAce's Avatar
 
Join Date: Feb 2001
Location: Bay Area, CA, U.S.A.
Posts: 2,160
Likes: 0
Received 0 Likes on 0 Posts
Idea to spool turbos faster?

I know it may sound hokey, but I've heard of people using their air pump as a "supercharger." Would an air pump provide enough CFM to help spool a turbo if it was plumbed into the exhaust manifold? Would the differences in temperature cause too much turbulence?
Old 05-23-02, 10:49 AM
  #2  
Rotary Freak

 
Join Date: Jan 2002
Location: l.a.
Posts: 1,640
Likes: 0
Received 0 Likes on 0 Posts
imo, it would lower egt's and make the turbo spool slower
Old 05-23-02, 12:52 PM
  #3  
On a long vacation

Thread Starter
 
13BAce's Avatar
 
Join Date: Feb 2001
Location: Bay Area, CA, U.S.A.
Posts: 2,160
Likes: 0
Received 0 Likes on 0 Posts
Originally posted by fdracer
imo, it would lower egt's and make the turbo spool slower
That's why I asked about the temperature difference. I was wondering if the increased airflow could overcome the decrease in EGT's.
Old 05-27-02, 11:56 PM
  #4  
Looking for a S5 TII??

 
fast13b's Avatar
 
Join Date: Feb 2002
Location: Grand Junction, CO
Posts: 338
Likes: 0
Received 0 Likes on 0 Posts
Just do what the rally guys do *pPow*

~J
Old 05-28-02, 03:36 AM
  #5  
almost done

 
KINETIK_FD3S's Avatar
 
Join Date: Dec 2001
Location: 250 HZ
Posts: 1,049
Likes: 0
Received 0 Likes on 0 Posts
whats ppow
Old 05-28-02, 08:55 AM
  #6  
On a long vacation

Thread Starter
 
13BAce's Avatar
 
Join Date: Feb 2001
Location: Bay Area, CA, U.S.A.
Posts: 2,160
Likes: 0
Received 0 Likes on 0 Posts
Originally posted by KINETIK_FD3S
whats ppow
They use that antilag system where timing is retarded while extra fuel is injected. It causes an explosion which helps keep the turbo spooled up. It works, but it's not the best thing for a turbo.
Old 05-28-02, 10:02 AM
  #7  
Eats, Sleeps, Dreams Rotary

iTrader: (61)
 
87GTR's Avatar
 
Join Date: Aug 2001
Location: Nago Okinawa
Posts: 3,103
Likes: 0
Received 1 Like on 1 Post
yeah anti lag will help your egt's .... sky rocket!!!

hope you got lots of $$$ as you will be rebuilding your turbo often.
Old 05-28-02, 10:14 AM
  #8  
W. TX chirpin Monkey

 
fastrotaries's Avatar
 
Join Date: Sep 2001
Location: Mesquite, TX
Posts: 2,684
Likes: 0
Received 0 Likes on 0 Posts
NITROUS....gets it spooled everytime.
Old 05-28-02, 10:51 AM
  #9  
On a long vacation

Thread Starter
 
13BAce's Avatar
 
Join Date: Feb 2001
Location: Bay Area, CA, U.S.A.
Posts: 2,160
Likes: 0
Received 0 Likes on 0 Posts
Originally posted by fastrotaries
NITROUS....gets it spooled everytime.
Yeah, that's what I was going to try. I was just wondering about the air pump thing. I figured it wouldn't work, but I thought I'd ask anyway.
Old 05-28-02, 11:06 AM
  #10  
Rotary Freak

 
Join Date: Jan 2002
Location: l.a.
Posts: 1,640
Likes: 0
Received 0 Likes on 0 Posts
try sequential twins
Old 05-28-02, 11:42 AM
  #11  
On a long vacation

Thread Starter
 
13BAce's Avatar
 
Join Date: Feb 2001
Location: Bay Area, CA, U.S.A.
Posts: 2,160
Likes: 0
Received 0 Likes on 0 Posts
Originally posted by fdracer
try sequential twins
I have 2 turbos right now. I guess I could use my T-78 as a primary and my T-76 as a secondary.
Old 05-28-02, 12:27 PM
  #12  
Full Member

 
VELCRO SHOES's Avatar
 
Join Date: Apr 2002
Location: SAINT LOUIS
Posts: 128
Likes: 0
Received 0 Likes on 0 Posts
I was watching a special on American Movie Classics or something like that on Drag Racing.They had a 4 cylinder intergra funny car on there running twin turbos.Anyways they said they were spooling the turbos with Nitrous but said it was against the rules right now.Are they talking about something else besides the obvious?
Old 05-28-02, 12:32 PM
  #13  
Rotary Freak

 
Join Date: Jan 2002
Location: l.a.
Posts: 1,640
Likes: 0
Received 0 Likes on 0 Posts
Originally posted by 13BAce

I have 2 turbos right now. I guess I could use my T-78 as a primary and my T-76 as a secondary.
Are you planning on using a 4 rotor to spool those things?
Old 05-28-02, 02:29 PM
  #14  
On a long vacation

Thread Starter
 
13BAce's Avatar
 
Join Date: Feb 2001
Location: Bay Area, CA, U.S.A.
Posts: 2,160
Likes: 0
Received 0 Likes on 0 Posts
Originally posted by fdracer


Are you planning on using a 4 rotor to spool those things?
If somebody want to make me a custom eccentrci shaft for free then sure.
Old 05-29-02, 07:58 PM
  #15  
Rotary Freak

 
Join Date: Jan 2002
Location: l.a.
Posts: 1,640
Likes: 0
Received 0 Likes on 0 Posts
what about creating backpressure, maybe a pressure sensitive plate in the downpipe which opens more and more with more exhaust pressure. That way you have the flow of a large diameter exhaust and the spool of a smaller one.
Old 05-29-02, 08:11 PM
  #16  
On a long vacation

Thread Starter
 
13BAce's Avatar
 
Join Date: Feb 2001
Location: Bay Area, CA, U.S.A.
Posts: 2,160
Likes: 0
Received 0 Likes on 0 Posts
Originally posted by fdracer
what about creating backpressure, maybe a pressure sensitive plate in the downpipe which opens more and more with more exhaust pressure. That way you have the flow of a large diameter exhaust and the spool of a smaller one.
You mean something similar to what Ferrari is using now?
Old 05-29-02, 08:25 PM
  #17  
Rotary Freak

 
Join Date: Jan 2002
Location: l.a.
Posts: 1,640
Likes: 0
Received 0 Likes on 0 Posts
****, i don't what ferrari is using now, i was just thinking of something like a butterfly valve opening and closing with exhaust pressure
Old 05-29-02, 08:29 PM
  #18  
On a long vacation

Thread Starter
 
13BAce's Avatar
 
Join Date: Feb 2001
Location: Bay Area, CA, U.S.A.
Posts: 2,160
Likes: 0
Received 0 Likes on 0 Posts
Originally posted by fdracer
****, i don't what ferrari is using now, i was just thinking of something like a butterfly valve opening and closing with exhaust pressure
Yeah, I think that's what it is. I remember alot of people talking about making something like that, but nothing ever came out of it, as far as I know. I think that I remember seeing something like that for a Dodge pickup. It could probably be adapted to an RX-7.
Old 05-29-02, 08:53 PM
  #19  
Banned. I got OWNED!!!
 
E6KT2's Avatar
 
Join Date: Feb 2001
Location: Illinois
Posts: 109
Likes: 0
Received 0 Likes on 0 Posts
Don't sportbikes have something like this? Yamaha's I remember being called an EXUP valve. I'd check into this, but it would seem to require a large chamber to accomodate the area lost to a butterfly assembly.
Old 05-29-02, 09:32 PM
  #20  
Old [Sch|F]ool

 
peejay's Avatar
 
Join Date: May 2001
Location: Cleveland, Ohio, USA
Posts: 12,507
Received 416 Likes on 296 Posts
Exhaust restriction after the turbo only hurts spool, it can't help it.
Old 05-29-02, 09:41 PM
  #21  
On a long vacation

Thread Starter
 
13BAce's Avatar
 
Join Date: Feb 2001
Location: Bay Area, CA, U.S.A.
Posts: 2,160
Likes: 0
Received 0 Likes on 0 Posts
Originally posted by peejay
Exhaust restriction after the turbo only hurts spool, it can't help it.
I can live with lag. I knew what I was getting into.
Old 05-29-02, 09:59 PM
  #22  
Senior Member

 
gorockrx's Avatar
 
Join Date: Mar 2001
Location: P'Cola, FL
Posts: 649
Likes: 0
Received 0 Likes on 0 Posts
Arrow Wastegate Control!

It's all about wastegate control.......I have been reading about these type valves to control the wastegate:

http://www.dawesdevices.com/boost.html

and

http://www.dawesdevices.com/race.html

They keep the wastegate completly closed until the desired boost level........this works very well on my car! The improvement in turbo spool is VERY impressive. Take a look and maybe you can get the same parts to make your own.

Hope that helps.....
Old 05-29-02, 10:00 PM
  #23  
Banned. I got OWNED!!!
 
sinfestboy's Avatar
 
Join Date: Feb 2002
Location: st. louis
Posts: 100
Likes: 0
Received 0 Likes on 0 Posts
JUST GET A VATN!!!

http://www.aerocharger.com/
Old 05-29-02, 10:08 PM
  #24  
On a long vacation

Thread Starter
 
13BAce's Avatar
 
Join Date: Feb 2001
Location: Bay Area, CA, U.S.A.
Posts: 2,160
Likes: 0
Received 0 Likes on 0 Posts
Re: Wastegate Control!

Originally posted by gorockrx
It's all about wastegate control.......I have been reading about these type valves to control the wastegate:

http://www.dawesdevices.com/boost.html

and

http://www.dawesdevices.com/race.html

They keep the wastegate completly closed until the desired boost level........this works very well on my car! The improvement in turbo spool is VERY impressive. Take a look and maybe you can get the same parts to make your own.

Hope that helps.....
Isn't that what electronic boost controllers do?
Old 05-29-02, 10:12 PM
  #25  
On a long vacation

Thread Starter
 
13BAce's Avatar
 
Join Date: Feb 2001
Location: Bay Area, CA, U.S.A.
Posts: 2,160
Likes: 0
Received 0 Likes on 0 Posts
Originally posted by sinfestboy
JUST GET A VATN!!!

http://www.aerocharger.com/
It looks like a good idea, but I'll wait for someone else to try it.


Quick Reply: Idea to spool turbos faster?



All times are GMT -5. The time now is 04:43 PM.