Homepage Garage Wiki Register Members List Social Groups Calendar Search Today's Posts Mark Forums Read
#Camaro6
Go Back   CAMARO6 > Engine | Drivetrain | Powertrain Technical Discussions > Forced Induction Discussions


AWE Tuning


Post Reply
 
Thread Tools
Old 02-16-2019, 08:05 AM   #1
Hilltopper
 
Drives: 2018 Camaro SS 1LE, 2017 Z06/Z07
Join Date: Jan 2019
Location: Burns, TN
Posts: 99
1 7/8" vs. 2" Kooks LTH

At what power level would be break even point where using the 2" header over the 1 7/8" Kooks header? I currently have the 1 7/8" Kooks installed, but have to take my car back down to Vengeance Racing next month for some updates and am wondering if it would be worth it to have them swap out my 1 7/8" headers for a set of 2" headers while it is there and being tuned. I am curious if anyone has done back to back testing at the 850 hp mark to see if there is any significant, real world gains in going to the larger diameter header. I know I will give up a little boost, but that could be addressed easily enough if it was enough boost to worry about. I have always believed that boosted engines like bigger exhaust, but I would like some real world feedback if it would be worth the effort in this specific combination. I am also curious if there are any issues with rubbing/clearance issues on the 2" headers as compared to the 1 7/8.
__________________
___________________________________________

2018 ZL1, Kong Ported LT4 SC, Kooks 2" Headers and X-Pipe, NW103mm TB, ATI Underdrive Pulley 673/688, 2017 Z06/Z07, Kong Ported LT4 SC, Kooks 2" Headers and X-Pipe, NW103mm TB, IW 18% Underdrive Pulley 640/664, 2019 Mustang GT Perf Pkg. 1
Hilltopper is offline   Reply With Quote
Old 02-16-2019, 08:51 AM   #2
laynlo15
 
laynlo15's Avatar
 
Drives: 2016 1ss A8, Npp
Join Date: Nov 2015
Location: clark, mo
Posts: 5,245
I'm running 1 7/8 BBK coated with high flow cats. Haven't been on the dyno yet but should be at 800 to 825 on 10-11 lbs of boost on E or race fuel. Staying with lower boost this year, old motor didn't like 16 lbs.
__________________
2016 Camaro 6.2, Magnuson 2650 Heartbreaker, Manley, Livernois cam, stock heads trans/converter/diff. Kentshotrodgarage (M/T,Hoosier, Racestar Wheels), BBK, RPM RB, DSS Griptec Pulley Best 9.41@146 Best MPH 149 1/4, 5.99@119 Best MPH 120 Best 60' 1.35. Magnuson Employee/Driver
laynlo15 is online now   Reply With Quote
Old 02-16-2019, 09:13 AM   #3
ShizzySupra
 
Drives: 16' Camaro 2SS
Join Date: Sep 2015
Location: Oregon
Posts: 374
At no point is it NOT worth going with 2” headers. Been proven time and time again you wont lose power anywhere and will only gain. I have had TSP 2” headers since my first round of mods and on extremely hard right hand turns you can occassionally hear a slight rub. That should be able to be adjusted with a slight tweak to the steering knuckle.
__________________
@DeathWatchCamaro on Insta
9.5 @ 145, Magnuson 2300, Full Weight 2SS, 17’s
ShizzySupra is offline   Reply With Quote
Old 02-16-2019, 09:41 AM   #4
USAFS197

 
USAFS197's Avatar
 
Drives: 2019 Corvette Z06
Join Date: Jan 2014
Location: Navarre, Florida
Posts: 1,600
Quote:
Originally Posted by ShizzySupra View Post
At no point is it NOT worth going with 2” headers. Been proven time and time again you wont lose power anywhere and will only gain. I have had TSP 2” headers since my first round of mods and on extremely hard right hand turns you can occassionally hear a slight rub. That should be able to be adjusted with a slight tweak to the steering knuckle.
Yeah, I agree with this. I'm a "do it once, do it right the first time" kind of guy. While you could make gobs of power through a 1 7/8, I don't see any particular reason to not go with a 2" setup right away. However, I have Kooks 2" headers. Good fitment, no rubbing issues.
__________________
2019 Corvette Z06 3LZ
USAFS197 is offline   Reply With Quote
Old 02-16-2019, 09:43 AM   #5
laynlo15
 
laynlo15's Avatar
 
Drives: 2016 1ss A8, Npp
Join Date: Nov 2015
Location: clark, mo
Posts: 5,245
I'm good with my choice and yes the 2" will make a little more power but I should have plenty to go where I'm planning.
__________________
2016 Camaro 6.2, Magnuson 2650 Heartbreaker, Manley, Livernois cam, stock heads trans/converter/diff. Kentshotrodgarage (M/T,Hoosier, Racestar Wheels), BBK, RPM RB, DSS Griptec Pulley Best 9.41@146 Best MPH 149 1/4, 5.99@119 Best MPH 120 Best 60' 1.35. Magnuson Employee/Driver
laynlo15 is online now   Reply With Quote
Old 02-16-2019, 06:08 PM   #6
oldman


 
Drives: SS 6 speed of course
Join Date: Jan 2016
Location: austin
Posts: 3,053
I like the clearance etc from the smaller header, but as stated at no point will the small header be "better" in the power making department. I had to upgrade to 2" because my goal is to make 709 WHP with the LEAST boost possible. I could not leave the 15 HP difference on the table (1 PSI).
__________________
2016 to 2017 Stage 1, FBO, ported MSD, 103 TB, E85

2018 Stage 2, P1C, 4.0 pulley, Pray ported heads, Pray stage 1 blower cam, TxSpeed valvetrain, 103mm TB, ported MSD, 1 and 7/8 headers

2019 stage 3: Forged short block 11.5 CR, "defined lope" supercharger cam 33% fuel lobe from Cam Motion, Pray Ported Heads, 3.65 pulley D1X, stage II intercooler, 2 BOVs, DSX secondary low side, DSX E85 sensor, Lingenfelter big bore 2.0, Kooks 2" coated, Lingenfelter injectors, ZL1 driveshaft and half shafts, wrap starter and header, MSD intake, 103 MM TB, BTR valvetrain.
oldman is offline   Reply With Quote
Old 02-27-2019, 06:12 AM   #7
Drsagacity

 
Drsagacity's Avatar
 
Drives: 2017 Camaro 2SS Nightfall Gray vert
Join Date: Jan 2018
Location: Swansea, IL
Posts: 1,204
Quote:
Originally Posted by oldman View Post
I like the clearance etc from the smaller header, but as stated at no point will the small header be "better" in the power making department. I had to upgrade to 2" because my goal is to make 709 WHP with the LEAST boost possible. I could not leave the 15 HP difference on the table (1 PSI).
I was over 700whp with the 1 7/8 headers @8psi. That’s a really easy target.
__________________
2017 Camaro 2SS - Nightfall Gray
Magnuson Heartbeat SC - Tuned by JRE Racing
776whp/745wtq (12psi)

2016 Corvette Stingray - Shark Gray
LT4 Supercharger - To be tuned by JRE Racing
TBD performance
Drsagacity is offline   Reply With Quote
Old 02-27-2019, 12:41 PM   #8
647
 
Drives: 2017 Camaro 1SS M6 Whipple SC
Join Date: Nov 2018
Location: Mesa, Arizona
Posts: 16
Boost is a measure of restriction. Just because you get a bigger exhaust or port your heads and boost drops does not mean a loss in power.
647 is offline   Reply With Quote
Old 02-27-2019, 02:43 PM   #9
18ss376
 
Drives: Camaro
Join Date: Sep 2018
Location: USA
Posts: 522
My 434ci engine made over 800h.p. with 1-7/8 headers on the dyno, started with 2" headers & lost over 20h.p. The dyno shop was very suprised & we told them 1-7/8" would make more power. My engine builder & I were just smiling after the dyno pull.
18ss376 is offline   Reply With Quote
Old 02-27-2019, 02:51 PM   #10
JonD
 
JonD's Avatar
 
Drives: 2018 SS 1LE
Join Date: May 2018
Location: Arizona
Posts: 292
2” was proven to not lose power and gain a little torque comparing cars with the same mods at the shop. I can’t speak for others experiences...

Plus with all the random Dyno graphs I see posted showing 500hp with a few bolt on’s to the tires gets me too, no consistency in Dyno load, correction factors, etc. I wonder if people realize the changes that can be made on a Dyno to spit out a fantastic #
__________________
🌽 Sauced, 2018 SS 1LE - 123mph @ 5,000 DA
ARH 2”x3” FULL System, Pray Ported MSD Intake Manifold, Pray Ported GM 95mm TB, RotoFab CAI, DsX e85 Kit, MightyMouse Catch Can, NicD Tune
https://instagram.com/corn_sauced?ut...d=o0ako89uurwl
JonD is offline   Reply With Quote
 
Post Reply

Thread Tools

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

Forum Jump


All times are GMT -5. The time now is 01:57 PM.


Powered by vBulletin® Version 3.8.9 Beta 4
Copyright ©2000 - 2019, vBulletin Solutions, Inc.