THE HEADER SIZE DEBATE WILL BE SETTLED ONCE AND FOR ALL - Page 4 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Edrock · 01-15-2010, 09:28 AM

Man...sure is alot of popcorn munch-n-crunch going on in here. Hey, somebody pass the salt.....

PieNsky · 01-15-2010, 09:33 AM

Whoa. Ted, they should have your username in Gold

.

robertway · 01-15-2010, 10:18 AM

Quote:

Originally Posted by 2SSRS

Can we get the A/F in the tail so we know if one set is leaner then the other.?

Get your mind out of the gutter.....

Rcfiddy1 · 01-15-2010, 11:08 AM

This will be good....

Nine Ball · 01-15-2010, 11:28 AM

I can't see how this test will show any meaningful results unless you get a better catback system than stock installed first.

Russell James · 01-15-2010, 11:40 AM

I wonder if the rest of the exhaust will make a difference. I.E if the stock catback is left on there providing a little more back pressure, would it really matter to the engine if the headers were 1 3/4 or 7/8?

Would be interesting to see this back to back to back test with a popular - x pipe and 3" cat back setup. So you'ld have the ideal back half of the exhaust, and then the only variable being the 3 different header sizes.

alfie43 · 01-15-2010, 11:46 AM

Quote:

Originally Posted by Nine Ball

I can't see how this test will show any meaningful results unless you get a better catback system than stock installed first.

It has been demonstrated many times and is commonly accepted that most of the restriction in the factory system is in the cast exhaust manifolds and cats. This is where your potential power gains are.

There are little power improvements to be had after the cats. Cat backs are mostly about audible improvements. We have seen axle backs changed with 0 hp gains on the dyno.

Alfie

JANNETTYRACING · 01-15-2010, 12:13 PM

Quote:

Originally Posted by alfie43

It has been demonstrated many times and is commonly accepted that most of the restriction in the factory system is in the cast exhaust manifolds and cats. This is where your potential power gains are.

There are little power improvements to be had after the cats. Cat backs are mostly about audible improvements. We have seen axle backs changed with 0 hp gains on the dyno.

Alfie

What He Said

Jason 98 TA · 01-15-2010, 03:05 PM

I've done this testing with the 1 3/4" & 1 7/8" on engine dyno testing before. It'll be interesting to see if you get the same results.

14pilot · 01-15-2010, 03:08 PM

Quote:

Originally Posted by Jason 98 TA

I've done this testing with the 1 3/4" & 1 7/8" on engine dyno testing before. It'll be interesting to see if you get the same results.

And your results are posted where ?

thalilbear02 · 01-15-2010, 03:57 PM

Quote:

Originally Posted by Nine Ball

I can't see how this test will show any meaningful results unless you get a better catback system than stock installed first.

Sorry, but I'll agree with the statement below:

Quote:

Originally Posted by Russell James

I wonder if the rest of the exhaust will make a difference. I.E if the stock catback is left on there providing a little more back pressure, would it really matter to the engine if the headers were 1 3/4 or 7/8?

Would be interesting to see this back to back to back test with a popular - x pipe and 3" cat back setup. So you'ld have the ideal back half of the exhaust, and then the only variable being the 3 different header sizes.

The exhaust manifold (aka the headers) are usually always the most restrictive part of the exhaust. Though technically without a tune you cant really benefit from all of the back pressure you have just released, but regardless it's an interesting idea for these guys to do it and obviously for vendors among the boards will probably try to stock more of the one that is chosen to produce the most power, and then aggressively price it for the market of Camaro guys.

Subscribed to see what these gains are!

maximus7969 · 01-15-2010, 04:00 PM

:emoticon7:

litle88 · 01-15-2010, 04:14 PM

Explain to me why you guys prefer not to tune a 1 7/8 or EVEN a 2 in primary long tube headers? As long as the AFR is the same throughout the test with all the headers then its fair. Not tuning a 2in primary and getting AFR reading at the tailpipe will not be accurate enough for a REAL test.

10redrocket · 01-15-2010, 04:28 PM

01-15-2010, 09:28 AM	#43
Edrock Drives: '10 Camaro 2SS LS3 Join Date: Jan 2009 Location: Jamestown, NC Posts: 964 View My Garage	Man...sure is alot of popcorn munch-n-crunch going on in here. Hey, somebody pass the salt..... __________________ DT Shorties, Solo hi-flow Cats, X-pipe, resonator delete, Flowmaster Super-44s, VMAX TB, Stronger MAF, C.A.I. Intake with race scoop, and JRE Tune! WOT is my happy place!!

01-15-2010, 11:08 AM	#46
Rcfiddy1 Sold car... Drives: 2010 Rally Yellow 2SS/RS #37115 Join Date: Oct 2009 Location: Manalapan, New Jersey Posts: 2,019 View My Garage	This will be good.... __________________ Build Thread ECS Novi 1500 Supercharged, LS3 conversion, Small blower cam, Alky Meth injection, 3:45 rear, BMR Suspension parts, 1LE Sways, Billy Boat ZL1 dual mode exhaust.

01-15-2010, 11:28 AM	#47
Nine Ball Drives: 1969 & 2016 Camaro SS Join Date: Oct 2008 Location: Houston, TX Posts: 3,849	I can't see how this test will show any meaningful results unless you get a better catback system than stock installed first. __________________ Fquick.com/NineBall

01-15-2010, 04:14 PM	#55
litle88 V8 Lounge member #2 Drives: 2001 Ws6 Join Date: Sep 2009 Location: Burbank,IL Posts: 6,373	Explain to me why you guys prefer not to tune a 1 7/8 or EVEN a 2 in primary long tube headers? As long as the AFR is the same throughout the test with all the headers then its fair. Not tuning a 2in primary and getting AFR reading at the tailpipe will not be accurate enough for a REAL test. __________________ 2001 ws6, 40k miles, Ls3 416 stroker, short block built by PER the rest by me. LPE Ls3 heads milled to 12-1 comp, FAST 102, NW 102, kooks 2", dual DMH cutouts, Magnaflow C/B, BTR cam + springs. Full UMI suspension.

01-15-2010, 04:28 PM	#56
10redrocket Drives: 2SS Camaro LS3 Join Date: Oct 2008 Location: Irwin, PA Posts: 195	__________________ RECEIVED 5/22/09 - 2SS, SIM with CGM stripes, Black Leather, Polished 20's, Sunroof, LS3. Past Rides: 69 Camaro RS Small Block 67 Chevelle SS Big Block 05 Cobalt SS Supercharged 07 Cobalt SS Supercharged 10 Camaro 2SS LS3 Soon: 18 Camaro 2SS 1LE

01-15-2010, 09:33 AM	#44
PieNsky Drives: Victory Red 1LS Join Date: Nov 2008 Location: Louisville,KY Posts: 1,928 View My Garage	Whoa. Ted, they should have your username in Gold .

01-15-2010, 11:40 AM	#48
Russell James Drives: '15 SS 1LE, '69 Z28 drag car Join Date: Dec 2009 Location: Mich Posts: 4,482	I wonder if the rest of the exhaust will make a difference. I.E if the stock catback is left on there providing a little more back pressure, would it really matter to the engine if the headers were 1 3/4 or 7/8? Would be interesting to see this back to back to back test with a popular - x pipe and 3" cat back setup. So you'ld have the ideal back half of the exhaust, and then the only variable being the 3 different header sizes.

01-15-2010, 03:05 PM	#51
Jason 98 TA Drives: Camaro Join Date: Apr 2009 Location: Texas Posts: 1,670	I've done this testing with the 1 3/4" & 1 7/8" on engine dyno testing before. It'll be interesting to see if you get the same results.

01-15-2010, 04:00 PM	#54
maximus7969 Account Suspended Drives: 2010 Camaro 2ss/sim Join Date: Feb 2009 Location: Mcallen,tx Posts: 219	:emoticon7: