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is 70hp to the engine worth it?

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Old Dec 15, 2014 | 12:11 PM
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Default Mr. Bill, last post?

Is 70hp to the engine worth spending over two thousand? Full exhaust and CAI? Mostly drive the car on the highway. Has forged motor and machine work on the heads. TIA

Last edited by c5z06.O; Apr 20, 2015 at 01:45 PM. Reason: I believe it was Mr Bill's last post
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Old Dec 15, 2014 | 12:16 PM
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Only you can answer that, it's your $. There are plenty of headers out there for less money. To me these cars should have headers.
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Old Dec 15, 2014 | 12:27 PM
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I also ask if it will make a dramatic difference? I understand about it being my mula. Are the hp gains to the motor something that i would be at "awh" with? Thanks again
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Old Dec 15, 2014 | 12:32 PM
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Originally Posted by c5z06.O
Is 70hp to the engine worth spending over two thousand? Full exhaust and CAI? Mostly drive the car on the highway. Has forged motor and machine work on the heads. TIA
Living in Kalifornia you are very limited to what you can get away with, Save some more money and get a SC.
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Old Dec 15, 2014 | 12:48 PM
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Default Mr. Bill

As always your input is very welcome. It did cross my mind to do the SC install before i make this decision. I already committed and did a cam upgrade. I could wait a couple of months to save up for the SC. Just needed to understand if this will be needed in the future.
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Old Dec 15, 2014 | 04:03 PM
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Being in California does limit you. I have a SC on my car (99 coupe) and otherwise stock (no headers. I'm in Kali too) dyno 510 atw. Drive it right through a smog station. A&A supercharger on my car. All CARB legal. Pretty much the only way to go in this state with their crazy emissions BS. Would like to do headers but not worth the hassle. Definitely makes the car more fun to drive. And stock feel driving around town when you are not on it. Another BIG win to me. Would hate to drive a big cam car day to day in traffic.
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Old Dec 15, 2014 | 04:33 PM
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Thanks. Im going to keep on saving for SC.
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Old Dec 15, 2014 | 05:12 PM
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You can do a C6 ZR1/Z06 exhaust for not too much money. The used manifolds and X-pipe usually sell on the forum for less than $500, and they work almost as well as long tube headers. Horsepower is close and torque is a little below what headers will give you. Though not technically legal, they are OEM parts, so the smog techs don't fail them. There are write ups by RedZMonte and MadMatt if you search for them.
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Old Dec 15, 2014 | 05:14 PM
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Not too me.
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Old Dec 15, 2014 | 05:33 PM
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Thanks Evil-Twin. I have a question. Does it matter that i have a ls2 on my z? Does the size or type on the headers matter? As suppose to 1 3/4" 1 7/8"? Also, can the x pipe be welded to the existing piping on the car? If so. Am i able to purchase the headers and the x pipe and just have them installed? TIA
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Old Dec 15, 2014 | 06:02 PM
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Originally Posted by john8642
You can do a C6 ZR1/Z06 exhaust for not too much money. The used manifolds and X-pipe usually sell on the forum for less than $500, and they work almost as well as long tube headers. Horsepower is close and torque is a little below what headers will give you. Though not technically legal, they are OEM parts, so the smog techs don't fail them. There are write ups by RedZMonte and MadMatt if you search for them.
How hard of a swap/conversion is the c6 zr1 z06 to a c5? Anyone know realistically how much horsepower id gain doing this on a 97 c5 .. my exhaust is stock with flowmaster force II axel back
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Old Dec 15, 2014 | 06:23 PM
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Originally Posted by c5z06.O
Is 70hp to the engine worth spending over two thousand? Full exhaust and CAI? Mostly drive the car on the highway. Has forged motor and machine work on the heads. TIA
Just SuperCharge it !!!
Call A&A, it's smog legal, and lots of power sitting there ready anytime you want it.
As RedRider said, driving normal is easy. Nail it, and it's awesome.

Good luck whatever you decide.

Don
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Old Dec 15, 2014 | 07:27 PM
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II agree with going the supercharger route. With an intake and full exhaust, I doubt you'll get 70 hp out of that. Save your money and get much more with a S/C and be smog legal in your state.
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Old Dec 15, 2014 | 07:46 PM
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Done. Waiting for the SC. My best guess out here is A&A. Thanks fellas
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Old Dec 15, 2014 | 08:38 PM
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Originally Posted by scottieg74
How hard of a swap/conversion is the c6 zr1 z06 to a c5? Anyone know realistically how much horsepower id gain doing this on a 97 c5 .. my exhaust is stock with flowmaster force II axel back
I haven't done it myself yet, but the conversion is fairly easy, from what I've read. You need to weld on air fittings to both manifolds, grind the flanges a little for clearance, and neck the X-pipe down from 3" to 2.5" to fit the axle back exhaust. Here's a thread from RedZMonte that details the swap.

https://www.corvetteforum.com/forums...7-exhaust.html
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Old Dec 15, 2014 | 10:40 PM
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I agree with everyone above, do the supercharger... I did longtubes, vararam, and a smallish cam and made 420rwhp in my z and even then it never felt that fast to me... after installing a blower it woke the car the F*** up... being in california going with a&a is a no brainer
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Old Apr 16, 2015 | 12:08 PM
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Default Bought the kooks

Well I bought the Kooks and soon will be taking it to American Heritage for the install. As soon as they arrive.
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To is 70hp to the engine worth it?

Old Apr 16, 2015 | 01:03 PM
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Default Bought the kooks

Well I bought the Kooks and soon will be taking it to American Heritage for the install. As soon as they arrive.
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Old Apr 16, 2015 | 02:04 PM
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Originally Posted by c5z06.O
Well I bought the Kooks and soon will be taking it to American Heritage for the install. As soon as they arrive.
You are aware there are no CARB approved headers manufactured for C5 Corvettes and if installed your car will not pass the emissions test?
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Old Apr 16, 2015 | 02:16 PM
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Default yes sir

I knew what I was getting into when I had the forged internals/cam install on the ls2 motor swap. So I went all out.
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