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C5 Power Modification Guide

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Old 05-13-2004, 03:13 PM
  #1  
pdykinga
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Default C5 Power Modification Guide

I was hoping some people with more expertise than me would help finish/edit this list and we could post it on the site for the new owners, like me :)

Modification path for C5
Product Cost Hp increase Street Legal

1)Intake $200-400 15-20 hp Y
2)cold air screens $100 3-5 hp Y
3)hood seal $12 ½ hp Y
4)Exhaust $500-1500 5 hp Most
5)Powerduct $200-300 hp?? Y
6)Throttle bypass $12 1hp Y
7)Thermostat $55 3 hp Y
8)X pipe $300 7-10 hp Y
9)High flow or no cats 500-700 hp?? Maybe
10)MAF sensor $325 15 hp Y
11)Intake manifold $700 15-20 hp Y
12)Throttle body $400 15 hp Y
13)Ecu reprogram $400 30hp Maybe
14)Headers $800-1500 30-40hp Not most
15)Cam $400 hp?? ??
16)Heads $1500-3000 hp ?? ??
17)Supercharger $5000-7000 150+hp??
18)Turbo
19)NOS
20)Methanol?
Old 05-13-2004, 03:40 PM
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blackbelt
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Default Re: C5 Power Modification Guide (pdykinga)

I was hoping some people with more expertise than me would help finish/edit this list and we could post it on the site for the new owners, like me :)

Modification path for C5
Product Cost Hp increase Street Legal

1)Intake $200-400 15-20 hp Y
2)cold air screens $100 3-5 hp Y
3)hood seal $12 ½ hp Y
4)Exhaust $500-1500 5 hp Most
5)Powerduct $200-300 hp?? Y
6)Throttle bypass $12 1hp Y
7)Thermostat $55 3 hp Y
8)X pipe $300 7-10 hp Y
9)High flow or no cats 500-700 hp?? Maybe

11)Intake manifold $700 15-20 hp Y
12)Throttle body $400 15 hp Y
13)Ecu reprogram $400 30hp Maybe
14)Headers $800-1500 30-40hp Not most
15)Cam $400 hp?? ??
16)Heads $1500-3000 hp ?? ??
17)Supercharger $5000-7000 150+hp??
18)Turbo
19)NOS
20)Methanol?
The reason you don't see a list like that is there are to many variables and assumptions about what a product makes. Some headers make more power than others. There are differnt cams for different applications and how much power you want to make. A lot of the power gains you quoted are the manufactures numbers which are usually not to accurate. Ex. 10)MAF sensor $325 15 hp? I really don't think so If you are refering to the Granetelli(I know my spelling sucks) its common knowledge that its pretty much junk and not worth the money. I think the problem with a list like that is too high of expectations people look at it buy a product based on it and when they don't get the power they were expecting they get :mad My advise for you and new owners is to talk to people on the board do some research and if you can go for a ride in peoples cars who have the mods you are considering.
Old 05-13-2004, 06:12 PM
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mdhmi
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Default Re: C5 Power Modification Guide (pdykinga)


Yes to numbers 1, 2, 4, 14 (if you include tuning which is another $500).

Mark
Old 05-13-2004, 06:41 PM
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Default Re: C5 Power Modification Guide (blackbelt)

I was hoping some people with more expertise than me would help finish/edit this list and we could post it on the site for the new owners, like me :)

Modification path for C5
Product Cost Hp increase Street Legal

1)Intake $200-400 15-20 hp Y
2)cold air screens $100 3-5 hp Y
3)hood seal $12 ½ hp Y
4)Exhaust $500-1500 5 hp Most
5)Powerduct $200-300 hp?? Y
6)Throttle bypass $12 1hp Y
7)Thermostat $55 3 hp Y
8)X pipe $300 7-10 hp Y
9)High flow or no cats 500-700 hp?? Maybe

11)Intake manifold $700 15-20 hp Y
12)Throttle body $400 15 hp Y
13)Ecu reprogram $400 30hp Maybe
14)Headers $800-1500 30-40hp Not most
15)Cam $400 hp?? ??
16)Heads $1500-3000 hp ?? ??
17)Supercharger $5000-7000 150+hp??
18)Turbo
19)NOS
20)Methanol?

The reason you don't see a list like that is there are to many variables and assumptions about what a product makes. Some headers make more power than others. There are differnt cams for different applications and how much power you want to make. A lot of the power gains you quoted are the manufactures numbers which are usually not to accurate. Ex. 10)MAF sensor $325 15 hp? I really don't think so If you are refering to the Granetelli(I know my spelling sucks) its common knowledge that its pretty much junk and not worth the money. I think the problem with a list like that is too high of expectations people look at it buy a product based on it and when they don't get the power they were expecting they get :mad My advise for you and new owners is to talk to people on the board do some research and if you can go for a ride in peoples cars who have the mods you are considering.
:iagree: Another problem is that, believe it or not, some people think the hp gains are cumulative. 15hp from a throttle body? Doubtful. Headers 30-40hp? Cats or no cats? Tuning or no tuning? Stock cats or hi flo cats? See where this is going
Old 05-13-2004, 11:09 PM
  #5  
Bigben
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Default Re: C5 Power Modification Guide (EB20003)

If I was starting over I would just find a good shop/vendor talk to them about your budget and buy the stuff that really works. I was real resistant to heads and cam at first. Now I don't know why.

1) Intake
2) Exhaust
3) Andy's $3500 Head and cam package or a similar package would beef things up pretty well.
4) Get it tuned.

With just those four things you would be faster then 95% of all cars on the road.

A lot of people spend a lot of money on bolt on stuff that doesn't do much for performance and that stuff adds up fast.




[Modified by Bigben, 10:09 PM 5/13/2004]
Old 05-14-2004, 01:31 AM
  #6  
pdykinga
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Default Re: C5 Power Modification Guide (Bigben)

boy, head and cam sure seems like the way to go, any downside? idle?

thanks

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