Notices
944 Turbo and Turbo-S Forum 1982-1991
Sponsored by:
Sponsored by: Clore Automotive

Best Way to 300 whp on 91 Pump Gas -Turbo S

Thread Tools
 
Search this Thread
 
Old 03-28-2006, 01:14 PM
  #1  
M758
Race Director
Thread Starter
 
M758's Avatar
 
Join Date: Aug 2002
Location: Phoenix, Az
Posts: 17,643
Likes: 0
Received 8 Likes on 7 Posts
Default Best Way to 300 whp on 91 Pump Gas -Turbo S

Ok gang,
I am begining to consider some power updates to my Turbo S.

I can put in Vitesse chip and should be able to get to about 275 rwhp on my stock K26/8. Correct?

What more would it take to hit a reliable 300 rwhp using crappy 91 pump gas?

Different Turbo? MAF? Injectors? WG?

BTW... I would probaly want to keep the cat on the car too.
Old 03-28-2006, 01:16 PM
  #2  
Mike1982
Drifting
 
Mike1982's Avatar
 
Join Date: Feb 2003
Location: Akron, Ohio
Posts: 2,254
Likes: 0
Received 0 Likes on 0 Posts
Default

With a MAF, injectors, new WG and tune it I would bet you could get 300rwhp out of it. If you drop your cat, I would say 99% sure you could get it with just those. How much boost do you want to run?
Old 03-28-2006, 01:25 PM
  #3  
jgporsche
Drifting
 
jgporsche's Avatar
 
Join Date: Oct 2005
Location: Hampton Roads, VA
Posts: 2,926
Likes: 0
Received 0 Likes on 0 Posts
Default

Tial WG/boost controller, 3" exhaust, possibly Vitesse AFM chip...... Although you'd definitely get 300WHP with the MAF.
Old 03-28-2006, 01:38 PM
  #4  
M758
Race Director
Thread Starter
 
M758's Avatar
 
Join Date: Aug 2002
Location: Phoenix, Az
Posts: 17,643
Likes: 0
Received 8 Likes on 7 Posts
Default

Originally Posted by Mike1982
How much boost do you want to run?
Low enough to still use 91 octane pump gas and drive in 110F heat on the street.

This would be done only after I pulled the motor, checked & cleaned everything.
Old 03-28-2006, 02:35 PM
  #5  
fast951
Addict
Rennlist Member


Rennlist
Site Sponsor

 
fast951's Avatar
 
Join Date: Mar 2002
Location: Atlanta
Posts: 6,885
Likes: 0
Received 37 Likes on 27 Posts
Default

Don't be too concerned with peak numbers. You only hit the pak at a certain RPM, but you spend most of the time at other RPMs. Shoot for the largest area under the curve. On your car the K26 is the limiting factor, it just does not flow wnough. If you want a solid 300rwhp, matching torque and a flat beefy power curve, you will have to upgrade the turbo (and associated components to support the added power).
__________________
John
Email
www.vitesseracing.com
Old 03-28-2006, 02:48 PM
  #6  
gregeast
Addict
Rennlist Member

 
gregeast's Avatar
 
Join Date: Jan 2004
Location: Loveland, Colorado USA
Posts: 2,911
Received 41 Likes on 32 Posts
Default

Hi Joe,

Take a look at this thread https://rennlist.com/forums/showthre...ferrerid=20449

Streckfu posted some interesting charts comparing the K27/6 to 2 different K26/8's
Old 03-28-2006, 03:08 PM
  #7  
M758
Race Director
Thread Starter
 
M758's Avatar
 
Join Date: Aug 2002
Location: Phoenix, Az
Posts: 17,643
Likes: 0
Received 8 Likes on 7 Posts
Default

Originally Posted by fast951
Don't be too concerned with peak numbers. You only hit the pak at a certain RPM, but you spend most of the time at other RPMs. Shoot for the largest area under the curve. On your car the K26 is the limiting factor, it just does not flow wnough. If you want a solid 300rwhp, matching torque and a flat beefy power curve, you will have to upgrade the turbo (and associated components to support the added power).

I figured that. So what is realistic if I stay with a my stock k26/8? The 300 hp thing is sort of a nice round number, but agree that the best thing is less peak power with a better curve.
Old 03-28-2006, 03:10 PM
  #8  
Jake951
Addict
Rennlist Member

 
Jake951's Avatar
 
Join Date: Mar 2002
Location: Greater Boston
Posts: 1,930
Received 14 Likes on 11 Posts
Default

The K26/8 will do 300 rwhp in the 951, although that's pushing the turbo pretty much to its limits. I did it with an MAP setup and with the factory cat, but my turbo was dropping boost in the upper rpm's (18 psi peak dropping to 15 psi at redline). I've heard of a few others who have also done around 300 rwhp with the K26/8. If your engine is good and strong I'm sure it can be done with a good MAF setup, perhaps the Vitesse. The part I'm not so sure about is whether it could be managed with 91 octane. I always run 93 octane.
Old 03-28-2006, 03:17 PM
  #9  
macnewma
Addict
Rennlist Member

 
macnewma's Avatar
 
Join Date: Oct 2003
Location: Indy
Posts: 1,750
Likes: 0
Received 0 Likes on 0 Posts
Default

If you want to push the boost with 91 octane and high ambient temps you could implement a water injection setup. Check out http://www.snowperformance.net/. You can also search for a couple of installs on Rennlist. I think B951S had a snow setup.
Old 04-01-2006, 01:12 AM
  #10  
lleroyb
Burning Brakes
 
lleroyb's Avatar
 
Join Date: Mar 2004
Location: Seattle
Posts: 837
Likes: 0
Received 0 Likes on 0 Posts
Default

M758,
I posted a dyno run several weeks ago. 263 RWHP or about 300 hp at the crank. 278 Ft/Lbs at the wheels. Weltmeister chips and a 3mm wastegate shim. 3 bar FPR. I would think Vitesse's chips would do even better. Stock air cleaner and exhaust. Plenty of power for a street car. (Now I am going to get flamed.)

Lou
Old 04-01-2006, 01:56 AM
  #11  
nize
Banned
 
nize's Avatar
 
Join Date: Aug 2004
Location: seattle, washington - usa
Posts: 1,822
Likes: 0
Received 0 Likes on 0 Posts
Default

get rid of that cat lou, you'll pass emissions without it.
Old 04-01-2006, 03:00 AM
  #12  
lleroyb
Burning Brakes
 
lleroyb's Avatar
 
Join Date: Mar 2004
Location: Seattle
Posts: 837
Likes: 0
Received 0 Likes on 0 Posts
Default

Believe me, the idea is tormenting me daily. I am still chicken though.

Lou
Old 04-01-2006, 10:05 AM
  #13  
washington951
Addict
Rennlist Member

 
washington951's Avatar
 
Join Date: Aug 2002
Location: El Lay
Posts: 1,248
Received 3 Likes on 3 Posts
Default

my car personally did 288 hp/306 tq at the wheels BEFORE the fabspeed testpipe. i gotta believe that the testpipe added close to 12hp if not a bit more...
Old 04-01-2006, 10:48 AM
  #14  
DanG
Three Wheelin'
 
DanG's Avatar
 
Join Date: Nov 2001
Location: Costa Mesa, CA
Posts: 1,594
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by macnewma
If you want to push the boost with 91 octane and high ambient temps you could implement a water injection setup. Check out http://www.snowperformance.net/. You can also search for a couple of installs on Rennlist. I think B951S had a snow setup.
This company also has some nice full-featured, high quality, decent priced kits...

http://www.devilsownonline.com/
Old 04-01-2006, 02:27 PM
  #15  
nize
Banned
 
nize's Avatar
 
Join Date: Aug 2004
Location: seattle, washington - usa
Posts: 1,822
Likes: 0
Received 0 Likes on 0 Posts
Default

270whp and 346wtq with light mods on pump gas;
https://rennlist.com/forums/showthre...highlight=dyno


Quick Reply: Best Way to 300 whp on 91 Pump Gas -Turbo S



All times are GMT -3. The time now is 04:30 AM.