Dynamometer Results & Comparisons Dyno Records | Dyno Discussion | Dyno Wars

help me get to 400rwhp

Thread Tools
 
Search this Thread
 
Old Aug 22, 2010 | 11:25 AM
  #1  
santiago's Avatar
Thread Starter
TECH Resident
iTrader: (28)
 
Joined: Sep 2004
Posts: 987
Likes: 0
From: norcal
Default help me get to 400rwhp

the car is a 05 cts-v with
CAI
vrx5 cam(236/238 113 lsa)
pacesetter headers
no cats
car was tuned on straight pipes but it has magnaflow mufflers now
i thought my car would make 400rwhp cuz it has an ls6 but **** i guess not.

the car made 393/355

Last edited by santiago; Aug 22, 2010 at 11:32 AM.
Reply
Old Aug 22, 2010 | 12:38 PM
  #2  
Black 99 Bird's Avatar
TECH Resident
20 Year Member
Photogenic
iTrader: (31)
 
Joined: Nov 2001
Posts: 815
Likes: 0
From: East, TN
Default

Do you think the tune is where it should be? Maybe a pulley will get you the 7 hp you need?
Reply
Old Aug 22, 2010 | 12:39 PM
  #3  
twitchtwice's Avatar
12 Second Club
iTrader: (12)
 
Joined: May 2008
Posts: 2,612
Likes: 1
Default

underdrive pulley will probably put you right over 400 and will cost about 350 including the belts and shipping.
Reply
Old Aug 22, 2010 | 01:25 PM
  #4  
SWEET98SS's Avatar
TECH Fanatic
20 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (8)
 
Joined: Dec 2002
Posts: 1,349
Likes: 2
From: Syracuse, NY
Default

Ported TB, FAST intake, underdrive, pick one or do them all
Reply
Old Aug 22, 2010 | 01:48 PM
  #5  
Twotonefreak's Avatar
TECH Resident
iTrader: (11)
 
Joined: Aug 2004
Posts: 806
Likes: 0
From: Southeast of Disorder
Default

Wait and dyno again in the cooler weather. That way all it cost you is dyno time
Reply
Old Aug 22, 2010 | 05:45 PM
  #6  
ds98formula's Avatar
TECH Resident
15 Year Member
Photogenic
iTrader: (3)
 
Joined: Mar 2008
Posts: 965
Likes: 0
From: Joliet Illinois
Default

Take it to the track and see what it says
Reply
Old Aug 22, 2010 | 07:09 PM
  #7  
santiago's Avatar
Thread Starter
TECH Resident
iTrader: (28)
 
Joined: Sep 2004
Posts: 987
Likes: 0
From: norcal
Default

Tune seems ok i jus got it back except it sputters wen I accelerate while driving in low rpm
Reply
Old Aug 22, 2010 | 07:43 PM
  #8  
RJB01camaross's Avatar
TECH Enthusiast
 
Joined: Mar 2008
Posts: 635
Likes: 0
From: Largo,FL
Default

Did you dyno on a mustang dyno by chance?
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

 Pouria Savadkouei
story-1

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

 Verdad Gallardo
story-2

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-3

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-4

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-5

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-6

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-7

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-8

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-9

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
Old Aug 22, 2010 | 07:53 PM
  #9  
98z8uup's Avatar
TECH Fanatic
iTrader: (7)
 
Joined: Apr 2008
Posts: 1,111
Likes: 0
From: Covington ,GA
Default

Are you sure the tunes okay. Also do you know why does it has the sputter down low.
I would think you should be at 400 now.
Reply
Old Aug 22, 2010 | 08:05 PM
  #10  
180ls1's Avatar
TECH Fanatic
iTrader: (4)
 
Joined: Jun 2007
Posts: 1,528
Likes: 1
From: San Diego
Default

Maybe get a better tune, because there is no reason why that car shouldnt make 410rwhp on a dynojet.
Reply
Old Aug 22, 2010 | 08:36 PM
  #11  
santiago's Avatar
Thread Starter
TECH Resident
iTrader: (28)
 
Joined: Sep 2004
Posts: 987
Likes: 0
From: norcal
Default

i was told the tune is good and it is good except for the sputtering so ill take it back for that,ya it was on a dynojet.
ported throttle body and underdrivepulley should get me there.
Reply
Old Aug 22, 2010 | 11:28 PM
  #12  
98z8uup's Avatar
TECH Fanatic
iTrader: (7)
 
Joined: Apr 2008
Posts: 1,111
Likes: 0
From: Covington ,GA
Default

Not trying to come down on you, but do know what makeing it sputtering? Also who told you it was a good tune? The tuner!
Reply
Old Aug 23, 2010 | 02:26 AM
  #13  
86zcamaro's Avatar
On The Tree
iTrader: (8)
 
Joined: Apr 2010
Posts: 165
Likes: 0
From: Independence MO
Default

I only have a partial tune and the only time it seems to not be responsive is right on start up and when I had lower octane gas. You do run premium with the tune and all?

If it didnt do that before the tune its not a good tune, I would get someone else to tune it or see if the person can fix it.

7rwhp isnt a huge amount, if your happy with how it runs I wouldnt bother for that little of a gain in my opinion. Its still over 400 before it gets to the wheels.
Reply
Old Aug 23, 2010 | 08:54 AM
  #14  
santiago's Avatar
Thread Starter
TECH Resident
iTrader: (28)
 
Joined: Sep 2004
Posts: 987
Likes: 0
From: norcal
Default

Originally Posted by 98z8uup
Not trying to come down on you, but do know what makeing it sputtering? Also who told you it was a good tune? The tuner!
well i assumed it was good because i payed $450 plus $80 in gas to get it tuned.

the sputtering im pretty confident can be tuned out because ive had other cars tuned and this never happened,
Reply
Old Aug 23, 2010 | 10:08 AM
  #15  
Super Speed's Avatar
Banned
iTrader: (8)
 
Joined: May 2005
Posts: 1,785
Likes: 0
From: 'Merica
Default

Underdrive pulley and ported throttle body should do it, if that doesn't then a fast or electric waterpump will get you there for sure!
Reply
Old Aug 23, 2010 | 10:10 AM
  #16  
kinglt-1's Avatar
TECH Senior Member
20 Year Member
Liked
Loved
Community Favorite
iTrader: (26)
 
Joined: Jul 2005
Posts: 5,898
Likes: 255
From: Ft. Wayne, IN
Default

if thats a cammed ls6 then its down about 20-30whp from where it should be imo... problem is dynos are different across the board. Get it to the track and see what it traps.
Reply
Old Aug 23, 2010 | 11:09 AM
  #17  
Damian's Avatar
LSX Mechanic
20 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (89)
 
Joined: Nov 2001
Posts: 10,396
Likes: 14
From: Atlanta
Default

When you say "sputtering", are you referring to low rpm surging or actual hesitation when you hit the gas? I've seen the X5 cause some low rpm surging on the LS1/LS6 motors with stock gearing, but it shouldn't be hesitation upon throttle.

I feel sorry for you Cali boys. Not too many shops out there know what the hell they're doing these days.
Reply
Old Aug 23, 2010 | 01:31 PM
  #18  
180ls1's Avatar
TECH Fanatic
iTrader: (4)
 
Joined: Jun 2007
Posts: 1,528
Likes: 1
From: San Diego
Default

I would consider taking the car to Nick at Newtech. Also did you upgrade the valvesprings and what rpm did you make max power at?
Reply
Old Aug 23, 2010 | 08:26 PM
  #19  
santiago's Avatar
Thread Starter
TECH Resident
iTrader: (28)
 
Joined: Sep 2004
Posts: 987
Likes: 0
From: norcal
Default

its definetly hestitation it almost doesnt wanna accelarate past 80 in 6th
it was tuned on straight pipes.
the day after i got it i took it to have magnaflows installed could this be the problem?

i mean 355rwtq on cam only ls6 is ****** bullshit as far as im concerned
Reply
Old Sep 4, 2010 | 08:57 AM
  #20  
santiago's Avatar
Thread Starter
TECH Resident
iTrader: (28)
 
Joined: Sep 2004
Posts: 987
Likes: 0
From: norcal
Default

ok so i just found out my car has been throwing the p0300 code,i guess they tuned it like that.

could this be a reason my car is a lil down on power?
Reply



All times are GMT -5. The time now is 01:27 PM.

story-0
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-1
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-2
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-3
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-4
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-5
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-6
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-7
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-8
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-9
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE