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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 04-03-2010, 11:32 AM   #1
SSinthedesert
 
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1 7/8 vs. 1 3/4 LT Headers

I'm having a problem decidine between 1 7/8 and the 1 3/4 LT headers. Does anyone have dyno sheets with the same setup in the car, only changing the size of the headers? Please no "I know a guy who knows a guy" stories. I want to see actual proof. I just have a hard time believing that an 1/8 of an inch warrants the $300-$400 dealers are charging. Show me proof and then I'll believe. Also, I'm sure the size of the cam will make a difference. Will putting a bigger cam make that much of a difference?
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Old 04-03-2010, 11:45 AM   #2
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Here's a great test on header sizes from the same manufacturer done recently by a respected tuner on this site: http://www.camaro5.com/forums/showth...ght=ted+header

Yes, cam will definitely make a big change. For that, here's a good article: http://www.gmhightechperformance.com...son/index.html

Most of those are pretty radical cams for street driving, though it all depends on your reference. Your best bet is to call 2-3 tuners you see on this site, tell them your current configuration, your goals, what you're willing to spend, etc. and they'll help you work up a configuration including cam that'll get you there. It's all about what you want and what you're willing to spend and that pretty well defines the final configuration.
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Old 04-03-2010, 12:16 PM   #3
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Whether it's worth it or not totally depends on two things:

1) What are your plans for the car?

2) What is your budget for carrying out those plans?
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Old 04-03-2010, 04:05 PM   #4
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Jannetty showed that the biggest LT's available right now, 2in, showed the most gains. This was throughout the entire bandwidth. The price difference is totally what your budget can afford.
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Old 04-03-2010, 06:06 PM   #5
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The 1 7/8s will work perfect for you, now and if you add a cam. I have 1 7/8s ARH on mine and it runs and sounds incredible.
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Old 04-03-2010, 06:21 PM   #6
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I just went through reading and asking tons of questions about headers. Get the 1 7/8! I just ordered my Kooks 1 7/8" LT catted headers a week ago.
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Old 04-03-2010, 08:44 PM   #7
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I got the 2 inchers and they are awesome.
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Old 04-03-2010, 09:16 PM   #8
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Just some food for thought.... I just ran a 10.99 @ 125 in my L99 and I have the Kooks 1 3/4 headers. The car was also built by Jannetty Racing. So any choice you make will be a good one. Gd Luck!
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