First GXP Dyno Numbers - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Bonneville GXP/ Northstar Powered Cars Discuss your Bonneville GXP and/or any other Northstar powered Olds or Cadillac... Including the 3.5L Twin Cam V6 (Short Star ) 4.0L and 4.6L Northstar V8's. Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Closed Thread
 
 
 
Thread Tools Search this Thread
Old 07-10-2004, 10:27 PM   #1
Executed
Thread Starter
 
Join Date: Aug 2002
Location: Purgatory
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
BadSSEi is on a distinguished road
Default First GXP Dyno Numbers

Totally stock - 1,300 miles on the odometer:

202.1 WHP (252.6 crank horsepower) @ 5,700 RPM (8% less than advertised)
216.3 WTQ (270.4 crank torque) @ 4,200 RPM (10% less than advertised)

The V8 sure does SOUND good on the dyno though...

Scott
BadSSEi is offline  
Old 07-10-2004, 10:29 PM   #2
Senior Member
Certified Car Nut
 
Join Date: Mar 2003
Posts: 12,432
Thanks: 0
Thanked 0 Times in 0 Posts
J Wikoff is on a distinguished road
Default

Did you contact Pontiac with these numbers? They might have something to say regarding the results.
J Wikoff is offline  
Old 07-10-2004, 11:04 PM   #3
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Why does my gut tell me that things are about to change a bit?
willwren is offline  
Old 07-10-2004, 11:34 PM   #4
Member
Posts like a V-Tak
 
Join Date: Aug 2002
Location: New Jersey
Posts: 95
Thanks: 0
Thanked 0 Times in 0 Posts
streetracer is on a distinguished road
Default Dyno

Does the Northstar develop more power after a break-in period?

I know the LS1 has a reputation for developing significantly more power as miles increase - mine continues to feel faster even though I got it at 30K miles.

Do we know if the 4T80 has higher drive train lost, than 4T65 - especially with 3.73 FDR?

Does any one have Dyno'* from a similar caddy?


What is the PCM like?

I know the SSEi and new GTP PCMs are extremely restrictive - but that appears to be due to torque limits of transmission. The 4T80 is supposedly good for 300 ft/lbs and the 4.6 is more a high power than high torque engine.

So, when will see PCMs?

I have heard that this engine/transcombo is capable of much higher rpms - although this version of the Northstar may not generate enough torque beyond stock shitpoints to yield more power.

I say heads/cam from the caddy hot rod fabricators - or better yet a custom instense grind and valve/port job

How about developing a turbo or MP112 kit?

Would love these to work with new Northstar VVT too. I am probably replacing my SSEi with an SRX V8 later this summer or early fall.
streetracer is offline  
Old 07-11-2004, 01:23 AM   #5
Senior Member
True Car Nut
 
Join Date: Jul 2003
Location: Westerville, Ohio 2000 Black SSEi
Posts: 6,127
Thanks: 0
Thanked 0 Times in 0 Posts
Rogue is on a distinguished road
Default

Yep, it roared like a lion. Unfortunately it ran like a kitten.
Rogue is offline  
Old 07-11-2004, 12:30 PM   #6
Junior Member
Posts like a Ricer Type-R
 
Join Date: Jul 2004
Location: Edison, New Jersey
Posts: 12
Thanks: 0
Thanked 0 Times in 0 Posts
marlon is on a distinguished road
Default

BadSSEI States:Totally stock - 1,300 miles on the odometer:

202.1 WHP (252.6 crank horsepower) @ 5,700 RPM (8% less than advertised)
216.3 WTQ (270.4 crank torque) @ 4,200 RPM (10% less than advertised)

Question: Was forced air used to simulate car movement? If not, your #'* are less than what they should be.
marlon is offline  
Old 07-11-2004, 12:58 PM   #7
Senior Member
True Car Nut
 
Join Date: Jul 2003
Location: Westerville, Ohio 2000 Black SSEi
Posts: 6,127
Thanks: 0
Thanked 0 Times in 0 Posts
Rogue is on a distinguished road
Default

Quote:
Originally Posted by marlon
If not, your #'* are less than what they should be.
Ummm...yea, he knows.
Rogue is offline  
Old 07-11-2004, 01:05 PM   #8
Junior Member
 
Join Date: Jun 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
2000SilverBullet is on a distinguished road
Default

Probably why the General is planning to supercharge that engine next year.

Beat them to the punch Scott.
2000SilverBullet is offline  
Old 07-11-2004, 01:11 PM   #9
Senior Member
Certified GM nut
 
Join Date: Jul 2003
Location: Chicagoland
Posts: 1,712
Thanks: 0
Thanked 0 Times in 0 Posts
TaylorD is on a distinguished road
Default

Scott, I didn't check the math but when I had my Aurora, few members dyno'ed them and couple of STS'* too and we came to the conclusion that the 4T80e trans has a 24% loss, just FWI.

Here where my #'*
Baseline---------190.0HP---196.7TQ
+Intake ----------198.3HP---202.9TQ
+80mm TB-------206.7HP---214.0TQ

At the crank 271.9HP 282.8TQ
TaylorD is offline  
Old 07-11-2004, 01:21 PM   #10
Junior Member
 
Join Date: Jun 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
2000SilverBullet is on a distinguished road
Default

Taylor, wasn't your Aurora a 4.0 L ?
Pretty good compared to the 4.6 L GXP.

Like Will, I think Scott will have that puppy singing a sweeter song real soon.
2000SilverBullet is offline  
 
 
Closed Thread

Related Topics
Thread Thread Starter Forum Replies Last Post
U.G.L.Y!!! #'s from 4/18 dyno. DYNO CHART bottom pg OLBlueEyesBonne Performance, Brainstorming & Tuning 14 05-13-2008 11:14 AM
Dyno'ed the 95 @ school the other day...NOW WITH DYNO GRAPHS DJ SHO General GM Chat 13 05-07-2005 01:15 AM
STOCK DYNO Numbers for the Series I SSEi'? DJ SHO General GM Chat 9 10-09-2004 01:08 AM
Getting SSEi & GTP dynoed Saturday. Guess dyno numbers. dbtk2 Performance, Brainstorming & Tuning 45 10-01-2003 06:03 PM
Dyno` numbers turtle_sse Performance, Brainstorming & Tuning 5 12-23-2002 09:37 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 01:32 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.