HELP: HEADERS SIZE - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

aet08 · 06-14-2010, 05:13 PM

I currently have a Vortech SC VS3 kit installed on my SS L99 Automatic with pre-programmed tune.

Car currently puts out 480 rwhp.

I need more power so I went back to company who installed it and he recommend the following:

KOOKS - 1 3/4" long tube headers, x-pipe w/cats, catback exhaust system
vortech fuel pump voltage booster
belt and pulleys
and a custom tune.

He said that if I go with larger headers (1 7/8" or 2") that I will actually lose power, since I'm not putting out 1000hp

Need some feedback and recommendations please!

SShift · 06-14-2010, 06:29 PM

I also agree, all you need is 1 3/4". If ya raced it at the track all the time then maybe 1 7/8"

Stock is a cast manifold.

tvwilkes · 06-14-2010, 07:41 PM

I don't believe that you would lose any power with the 1 7/8" headers. I would add 1 7/8" headers and an under drive pulley, with a custom tune.

8ty8 ls1 · 06-14-2010, 08:13 PM

1 7/8" all the way. you will not lose power. if anything it should breathe a little better.

*GTAHVIT* · 06-14-2010, 08:16 PM

1 7/8ths seems to be the norm for most blown cars... at the 500+ range.

I would not go any bigger than 1 7/8ths.

Jekyll-N-Hyde · 06-14-2010, 08:19 PM

Quote:

Originally Posted by GTAHVIT

1 7/8ths seems to be the norm for most blown cars... at the 500+ range.

I would not go any bigger than 1 7/8ths.

I agree however ADM just installed 2inch headers with a large Cam along with a TVS2300 maggy and they brought out 625 hp and I heard Any myself tell the owner " firefighter1 " Just wait there is much more Hp in this car

I would say 1 7/8 unless you have a real monster then I would go 2inch

Apex Motorsports · 06-14-2010, 08:20 PM

You need the 1 7/8ths.

Supercharged SS · 06-14-2010, 08:28 PM

You don't "need" the 1 7/8". You may want them. Not to sound like a d**k here but I have one of the few and one of the first 10 second 5th gen camaros and yes it has 1 3/4" Kooks on it. At the time I put them on I wasn't planning on modding the car so much. So they stayed on the car and haven't been a hinderance. I asked Jannetty, the car builder, if I should change them out and he has told me NO. Now, if I was to do it all over again, I would CHOOSE the 1 7/8". They seem like the best all around choice.

Apex Motorsports · 06-14-2010, 08:39 PM

Quote:

Originally Posted by Supercharged SS

You don't "need" the 1 7/8". You may want them. Not to sound like a d**k here but I have one of the few and one of the first 10 second 5th gen camaros and yes it has 1 3/4" Kooks on it. At the time I put them on I wasn't planning on modding the car so much. So they stayed on the car and haven't been a hinderance. I asked Jannetty, the car builder, if I should change them out and he has told me NO. Now, if I was to do it all over again, I would CHOOSE the 1 7/8". They seem like the best all around choice.

I'm not saying he needs them because there will be some kind of problem if he doesn't, but if your going to invest this kind of money in a car thats already running a supercharger the 1 7/8ths are going to give him a substantially better result than 1 3/4. When someone asks for my recommendation on what will give him the best results, I'm going to tell him what I think he "needs".

Since Jannetty was mentioned, here is some test numbers he ran a while back along with his comments. Forced induction only reinforces what this testing showed.

Quote:

Originally Posted by JANNETTYRACING

Stock Peak Numbers 373 RWHP 378 RWTQ
Stock Average Numbers I will post tomorow Forgot to print them.

1.75 long tube headers w high flow cats Peak 401.1 HP 403.8 TQ
1.75 long tube headers w high flow cats Average 281.2 HP 363.9 TQ

1.875 long tube headers w high flow cats Peak 406.8 HP 407.5 TQ
1.875 long tube headers w high flow cats Average 283.7 HP 366.6 TQ

2.0 long tube headers w high flow cats Peak 411.7 HP 408.9 TQ
2.0 long tube headers w high flow cats Average 288.1 HP 368.1 TQ

The 1 3/4 Headers did Surprisingly well.
The 1 7/8 Headers IMO are the best all around header.
The 2.0 Headers are neck and neck with the 1 7/8 but Slightly stronger from 5000 to 6300

danhr · 06-15-2010, 09:27 AM

You will be leaving a lot left on the table with 1 3/4. The guys might be thinking about gen i/gen ii motors. I would atleast go with 1 7/8. If you plan on modding more.. maybe even 2". I wouldnt dream of putting 1 3/4 on it though.

Darth_Emma · 06-15-2010, 09:57 AM

I just went through this. I went with 1 7/8" headers (thanks, danhr). Those will leave you some room to increase your hp later if you decide you want a Maggie or a cam (or both). I didn't want to limit myself by going with 1 3/4".

aet08 · 06-16-2010, 02:25 PM

thanks guys, switched to 1/78" headers.

MarylandSpeed · 06-16-2010, 02:40 PM

Both 1 3/4 or 1 7/8" would perform basically the same in that application. I would run 1 7/8" just to have room to grow.

gtbaldini · 06-16-2010, 02:52 PM

1 7/8" is my vote as well

06-14-2010, 05:13 PM	#1
aet08 Drives: c Join Date: Feb 2010 Location: c Posts: 627	HELP: HEADERS SIZE I currently have a Vortech SC VS3 kit installed on my SS L99 Automatic with pre-programmed tune. Car currently puts out 480 rwhp. I need more power so I went back to company who installed it and he recommend the following: KOOKS - 1 3/4" long tube headers, x-pipe w/cats, catback exhaust system vortech fuel pump voltage booster belt and pulleys and a custom tune. He said that if I go with larger headers (1 7/8" or 2") that I will actually lose power, since I'm not putting out 1000hp Need some feedback and recommendations please! Last edited by aet08; 06-15-2010 at 04:04 PM.

06-14-2010, 08:13 PM	#4
8ty8 ls1 Resident Engineer Drives: 2010 Camaro SS, 1988 GMC S-15 Join Date: Jun 2009 Location: New Jersey Posts: 766	1 7/8" all the way. you will not lose power. if anything it should breathe a little better. __________________ 12.68 @ 109: LSR cai, Borla S-type axle-back, Tunes

06-14-2010, 08:16 PM	#5
GTAHVIT Blessed Drives: 2013 Sonic RS MT Join Date: Dec 2007 Location: Saint Augustine FL Posts: 28,444 View My Garage	1 7/8ths seems to be the norm for most blown cars... at the 500+ range. I would not go any bigger than 1 7/8ths. __________________ Click image to see build thread. PQ - "the love of cars. It's a boys first step toward manhood and a mans last hold on boyhood." Fbodfather - "We do not want to use the Z28 moniker on a car that does not deserve this hallowed name." The_Blur - "Let's not confuse competitors with equals."

06-15-2010, 09:27 AM	#10
danhr BAMF SS Drives: 2016 Camaro 1SS A8 Join Date: Mar 2010 Location: Ford City, PA Posts: 3,023	You will be leaving a lot left on the table with 1 3/4. The guys might be thinking about gen i/gen ii motors. I would atleast go with 1 7/8. If you plan on modding more.. maybe even 2". I wouldnt dream of putting 1 3/4 on it though. __________________ 2016 1SS A8: FBO + Circle D + P1X + Meth + Tuned by Pray Performance Stock Longblock 800 SAE rwhp. 9.4 @ 145 mph.

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06-14-2010, 06:29 PM	#2
SShift Drives: Only Bowties! Join Date: Jan 2009 Location: Depths of Hell Posts: 154	I also agree, all you need is 1 3/4". If ya raced it at the track all the time then maybe 1 7/8" Stock is a cast manifold.

06-14-2010, 07:41 PM	#3
tvwilkes Drives: 2010 Camaro 2SS Join Date: Aug 2009 Location: Rainbow City,Al Posts: 341	I don't believe that you would lose any power with the 1 7/8" headers. I would add 1 7/8" headers and an under drive pulley, with a custom tune.

06-14-2010, 08:20 PM	#7
Apex Motorsports Drives: 2000 Camaro SS Join Date: Feb 2010 Location: Louisville, Ky. Posts: 25,179	You need the 1 7/8ths.

06-14-2010, 08:28 PM	#8
Supercharged SS Account Suspended Drives: 2010 Camaro Join Date: Feb 2010 Location: Sandy Hook, CT Posts: 11,927	You don't "need" the 1 7/8". You may want them. Not to sound like a d**k here but I have one of the few and one of the first 10 second 5th gen camaros and yes it has 1 3/4" Kooks on it. At the time I put them on I wasn't planning on modding the car so much. So they stayed on the car and haven't been a hinderance. I asked Jannetty, the car builder, if I should change them out and he has told me NO. Now, if I was to do it all over again, I would CHOOSE the 1 7/8". They seem like the best all around choice.

06-15-2010, 09:57 AM	#11
Darth_Emma Psssssssssshhhhhhhhhhhhh! Drives: under contruction Join Date: Nov 2009 Location: Marysville, Ohio Posts: 12,996 View My Garage	I just went through this. I went with 1 7/8" headers (thanks, danhr). Those will leave you some room to increase your hp later if you decide you want a Maggie or a cam (or both). I didn't want to limit myself by going with 1 3/4".

06-16-2010, 02:25 PM	#12
aet08 Drives: c Join Date: Feb 2010 Location: c Posts: 627	thanks guys, switched to 1/78" headers.

06-16-2010, 02:40 PM	#13
MarylandSpeed Account Suspended Drives: 2012 ZL1 & 2010 2SS/RS Join Date: Jul 2009 Location: Maryland Posts: 3,378	Both 1 3/4 or 1 7/8" would perform basically the same in that application. I would run 1 7/8" just to have room to grow.

06-16-2010, 02:52 PM	#14
gtbaldini Drives: 2010 Cyber Grey 2SS/RS LS3 Join Date: Jul 2009 Location: Albuquerque Posts: 153	1 7/8" is my vote as well