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Old Jun 3, 2015 | 09:48 AM
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Good morning
Purchased a 98 C5 last year (only 50K on it!)
engine is completely stock. what is the quickest and easiest way to increase the standard 345 horses?
Thanks
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Old Jun 3, 2015 | 10:29 AM
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How much power do you want ? You can do a cold air intake, upgrade the intake manifold, bigger cam, ported heads, headers, exhaust etc.

Or get a supercharger for even more power. A&A vortex kit seems the most popular. They advertise 500hp and no degradation of gas mileage or drivability.

Mine is bone stock except for exhaust dumps. Think I'm gonna get a cat back exhaust system, CAI, and tune.
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Old Jun 3, 2015 | 10:41 AM
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On my 2000 coupe I did the vararam, LS6 intake, long tube headers, cat back exhaust, custom tune and I'm adding a v2 cam in a few weeks.
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Old Jun 3, 2015 | 10:53 AM
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Originally Posted by Corvette#2
How much power do you want ? You can do a cold air intake, upgrade the intake manifold, bigger cam, ported heads, headers, exhaust etc.

Or get a supercharger for even more power. A&A vortex kit seems the most popular. They advertise 500hp and no degradation of gas mileage or drivability.

Mine is bone stock except for exhaust dumps. Think I'm gonna get a cat back exhaust system, CAI, and tune.
Thanks for the reply, I am only looking for maybe 15 to 20 horses to start. I was thinking of getting a dual cone air intake to replace the stock model. Any thoughts?
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Old Jun 3, 2015 | 10:54 AM
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thanks
I am only looking for an extra 15 to 20 horses. I was thinking of a dual cone air intake to replace the current stock intake. Any thoughts on that?
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Old Jun 3, 2015 | 11:18 AM
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Originally Posted by Mrmoose
thanks
I am only looking for an extra 15 to 20 horses. I was thinking of a dual cone air intake to replace the current stock intake. Any thoughts on that?
Keep your money in your pocket, you'll never know you added 15-20 HP.
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Old Jun 3, 2015 | 11:20 AM
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I don't know which specifically you are asking about. Dual cone filters might not be a cold air intake. I'm leaning towards a Callaway honker or possibly Halltech.
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Old Jun 3, 2015 | 11:25 AM
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Thanks all
I have to admit, I like the look of the dual cones as well, in any case, I am assuming that it would be an improvement (both looks and horsepower) over the current stock setup.
Thoughts?
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Old Jun 3, 2015 | 11:27 AM
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For the price of one of these CAI's, you could have fresh paper filters every few months for MANY years. No matter what you do, the tube going over the radiator is probably the biggest restriction, not the air filter (which really is a CAI from the factory since it's out front already).
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Old Jun 3, 2015 | 12:00 PM
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Originally Posted by Mrmoose
Good morning
Purchased a 98 C5 last year (only 50K on it!)
engine is completely stock. what is the quickest and easiest way to increase the standard 345 horses?
Thanks
SuperCharge it !!!
Drives like (almost like) stock, until you mash the gas pedal.... then; it's nothing like stock...

Don
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Old Jun 3, 2015 | 12:05 PM
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Originally Posted by bluevette2001
Keep your money in your pocket, you'll never know you added 15-20 HP.
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Old Jun 3, 2015 | 12:05 PM
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A dual cone intake might look nice, but it is not going to get you anywhere near 15-20HP that I know of. If you like it for looks go for it, maybe you'll get 3-4HP compared to a base model air box? I also understand the dual cones have flow issues compared to single air filter units like a Blackwing, etc. Whatever you do get a plastic unit, not metal of any sort (heat transfer/retention). A stock Z06 air box also flows better than the base model unit, another consideration (or enlarge the front opening on yours).
If you want 15-20HP, long tube headers and a tune will get you there. A cam, heads etc. will take you further, depends on how much you want to spend and your power goal in the long run.
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Old Jun 3, 2015 | 12:21 PM
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If you have an A4, the best SOTP improvement for the dollar is probably swapping the rear diff for 3.42 or 3.73 gears. Add a 3200 or 3600 stall torque converter at the same time.
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Old Jun 3, 2015 | 12:36 PM
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Most of those twin cone intakes are junk. Most have aluminum tubing that will heat up and hurt performance. I would do the flip-tie mod with k&n filter to start. Only intake you will feel is vararam. I went from flip-tie to vararam and felt the difference. But if you don't want to spend alot the flip-tie is the second best bang for buck as it sucks up cold air from the radiator area. The c5s are designed as bottom feeders.
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Old Jun 3, 2015 | 01:23 PM
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take it to a good shop in your area and have it dyno tuned, most likely you will pick up 10+ hp. you will also know where you are at.

then really think about what you want out of it. there are lots of ways to make lots of power in the LS1.

the twin cone intakes are mostly not worth the money do a search for the zip tie mod first.

good luck.

M_T_0
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Old Jun 3, 2015 | 01:48 PM
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Thanks all
with everything said, if I just wanted to replace the stock air intake with something to boost power - what is the best product out there (cold air intakes)
Thanks
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Old Jun 3, 2015 | 01:55 PM
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Originally Posted by Mrmoose
Thanks all
with everything said, if I just wanted to replace the stock air intake with something to boost power - what is the best product out there (cold air intakes)
Thanks
I have the Vararm B2 on our C5 along with the TI exhaust upgrade it made a feel it in the seat of your pants difference... it has hurt our MPG a little if that is an issue, from 29 to 24...plus I probably drive a little harder cause I can actually hear it now at about 3k rpm.
It's the only one I've tried on a C5 so I can't say anything about the competition except that the Haltech seems to have a good reputation.
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Old Jun 3, 2015 | 02:02 PM
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Originally Posted by grantv
A dual cone intake might look nice, but it is not going to get you anywhere near 15-20HP that I know of. If you like it for looks go for it, maybe you'll get 3-4HP compared to a base model air box? I also understand the dual cones have flow issues compared to single air filter units like a Blackwing, etc. Whatever you do get a plastic unit, not metal of any sort (heat transfer/retention). A stock Z06 air box also flows better than the base model unit, another consideration (or enlarge the front opening on yours).
If you want 15-20HP, long tube headers and a tune will get you there. . A cam, heads etc. will take you further, depends on how much you want to spend and your power goal in the long run.
Those mods will get you a slight bump in hp without breaking the bank.

As far as a good cold air intake, the Vararam is probably the best (but can be a PITA to install) and the Callaway Honker is a good one. I run a Blackwing on my car and while not a cold air intake, it is better than the stock filter and an easy install.
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Old Jun 3, 2015 | 02:04 PM
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Originally Posted by 73Corvette
I have the Vararm B2 on our C5 along with the TI exhaust upgrade it made a feel it in the seat of your pants difference... it has hurt our MPG a little if that is an issue, from 29 to 24...plus I probably drive a little harder cause I can actually hear it now at about 3k rpm.
It's the only one I've tried on a C5 so I can't say anything about the competition except that the Haltech seems to have a good reputation.
Your "seat in the pants" feeling is most likely the extra noise your hearing and not much else. Now you keep your foot in it more and that's why your mileage is falling.
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Old Jun 3, 2015 | 02:09 PM
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I'd go with a mail order tune from ECS (East Coast Supercharging).
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