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increasing my c5 50 to 70hp

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Old 06-13-2012, 05:36 AM
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corvette c5er
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Default increasing my c5 50 to 70hp

hello guys
i have 98 c5 that so far has the
1 original replacement k&n filter
2 original transmission with (4l60E) clutches
3 corsa exhaust
and i want to increase my car hp 50 or 70 horses without ruining the smoothness of my vehicle
some people tell me do some computer tuning and headers
and some tell me put electric tuning like ngk plugs msd plug wires msd coils
but what i have in mind is intake tuning and racing cams and some electric tuning
but most importantly i dont want to ruin the smoothness of the ride
so what can i do ? and i dont wanna pay big bucks
Old 06-13-2012, 06:09 AM
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baxsom
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speed, reliability, cheap

pick 2.

50 to 70 hp is going to require a head and cam swap plus tune. the right cam will make it run like stock and but you are looking at a few thousand for that hp goal.

with a 98
you can do a LS6 intake,
long tube headers,
decent air filter,
and a flash tune from ECS for 1500.00

the better intake and exhaust should be done before a cam anyway.
depending on what rear end you have a cheaper alternative may be to switch gears. It wont give more hp but will make the car take off faster.

coils, wires, and plugs will not add one single hp. those are maintenance items.
the stock coils will support well over what your goal is.
while MSD wires are popular, the oem GM wires are cheaper and will do exactly what you need them to do.
the NGK plugs are not a bad idea especially if you have the original ones still in it.

get all your maintenance items 100% first (dont forget brakes) then look towards more power.
Old 06-13-2012, 06:37 AM
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warren s
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What is your definition of "Big bucks?"

Are you doing the work yourself? Or paying for labor?

(BTW - I have MSD Coils and wires on my 99, was told by the shop that tuned my car - they are a waste of money - and its just a matter of time before I have a problem with them)

Last edited by warren s; 06-13-2012 at 06:40 AM.
Old 06-13-2012, 06:20 PM
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steven31371
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I'm kinda a noob so take my advice witha grain of salt...but for that amount of horsepower gain I'd do the zip tie diy airbox mod, especially sense you already have the K&N, that 15-20 HP right there for a cost of about 20 minutes and $2.49 in long zip ties from home depot.

Then I'd do headers....another 20-30 HP

and if you you want to spend another grand do the Fast 102 mil intake manifold and throttle body....

then you you have 50-70 more horsepower and don't need a tune and will runn smooth as stock....just pull the battery cable for a few mi utes and reconnect then drive the car for a few hours and the pcm will remap itself.

first do the zip tie mod though with the battery disco and reco....then drive for a few hours at varying speed till the pcm remaps on its own... you will be amazed at how muchthe car wakes up and how it sounds from just this simple thing

good luck!
Old 06-13-2012, 06:30 PM
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warren s
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Originally Posted by steven31371
I'm kinda a noob so take my advice witha grain of salt...but for that amount of horsepower gain I'd do the zip tie diy airbox mod, especially sense you already have the K&N, that 15-20 HP right there for a cost of about 20 minutes and $2.49 in long zip ties from home depot.

Then I'd do headers....another 20-30 HP

and if you you want to spend another grand do the Fast 102 mil intake manifold and throttle body....

then you you have 50-70 more horsepower and don't need a tune and will runn smooth as stock....just pull the battery cable for a few mi utes and reconnect then drive the car for a few hours and the pcm will remap itself.

first do the zip tie mod though with the battery disco and reco....then drive for a few hours at varying speed till the pcm remaps on its own... you will be amazed at how muchthe car wakes up and how it sounds from just this simple thing

good luck!


Ok, the Zip tie mod "may" be good for a few hp - maybe
Headers in the 20s to maybe 30s WITH a tune
The fast 102 and a larger TB would be a very poor choice, major waste of money - an LS6 manifold would be a much better choice for this application.

Last edited by warren s; 06-13-2012 at 06:38 PM.
Old 06-13-2012, 07:30 PM
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Hmmm....I did the zip tie mod with a K&N airfilter, and I cut some holes in the fog light opening and put some of the grill inserts in there for ascetics...I got a lot more than a few HP out of it, and the car sounds much better, It was a very significant differance, but then again, I have a 98 Vert, which about the most restrictive airbox on a C5... so my gains were probably more than you would get on a later model c5 Z06....I agree with your comment about the manifolds and TB though...depending on what car he has In my opinion he can probably get 35-45 hp gain for a little over $1,000 with the zip tie mod and headers...but then he will probably have to spend another $1,000 just to get 10 more HP with an IM and TB.

Its seems like a hard target to hit (50-70 HP), becuase he can soend very little money (less than $1,000) for a 30-40 ish HP gain, or spend several thousand and get to a 70-100 Hp gain

Or spend 6-8k and get 150-175 Hp gain

again...I'm no exiert, just a guy doing a lot of research.

The zip tie mod did wonders on my specific model though....and was a dirt cheap easy mod that woke my car up till I get the SC on there.

As an aside...I also removed the screen from my MAF (very catefully), when I did the K&N and zip tie mod.

He has the 98 c5, it also has the VERY restrictive stock airbox.

Last edited by steven31371; 06-13-2012 at 07:41 PM.
Old 06-13-2012, 07:37 PM
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Its funny about the zip tie mod...I saw articles about guys putting high flow airboxes with intake manifolds and throttle bodies etc., spending high hundreds or low thousands and only got 20-25 hp gains...but I'd swear just from the feel of it that I got a 15-20 hp gain from just a K&N with the zip tie mod and some openings cut into fog light area that you cannot see unless you get down on the ground...total cost about $60 bucks, and the air filter was $57 of that lol
Old 06-13-2012, 08:09 PM
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Cam, longtubes, X-pipe, ziptie mod, LS6 Intake(since you are a 98), good tune. This will meet all of your goals.

My Z is at 417rwhp with these mods. So I'm about 50-60 up on stock, not even considering the torque everywhere.

Last edited by MawneeC5; 06-13-2012 at 08:13 PM.
Old 06-13-2012, 08:18 PM
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warren s
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http://rides.webshots.com/album/175567286JWXgxa?start=0

Take a look at the link above from my old webshots pages. . I did the zip tie mod years ago, just like half of almost all the C5 owners out there.

Didnt do anything for my ETs, but it did seem like an improvement.

The OP needs to give more info for a qualified answer.
Old 06-13-2012, 08:28 PM
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baxsom
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look at it this way, i just dropped off my 00 for a major install, PRC stage 2.5 heads, 228/228 cam, FAST intake, headers, UDP and tune.

installer said to expect a realistic 80-100 hp gain.
Old 06-13-2012, 08:32 PM
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Originally Posted by baxsom
look at it this way, i just dropped off my 00 for a major install, PRC stage 2.5 heads, 228/228 cam, FAST intake, headers, UDP and tune.

installer said to expect a realistic 80-100 hp gain.
Almost exactly what I just did. PRC Heads and 228R cam, 100+ over my baseline. (plus Longtubes and Vararam) Wasnt cheap and i did the work.
Old 06-13-2012, 08:46 PM
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Originally Posted by baxsom
look at it this way, i just dropped off my 00 for a major install, PRC stage 2.5 heads, 228/228 cam, FAST intake, headers, UDP and tune.

installer said to expect a realistic 80-100 hp gain.
How much are you spending with install and tune included?

If ya don't mind me asking...
Old 06-19-2012, 06:25 AM
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Originally Posted by warren s


Ok, the Zip tie mod "may" be good for a few hp - maybe
Headers in the 20s to maybe 30s WITH a tune
The fast 102 and a larger TB would be a very poor choice, major waste of money - an LS6 manifold would be a much better choice for this application.
Agreed get a LS6 mass, manifold and TB. If you get a set of headers and midpipes off this site you can get out pretty cheap buying from a vendor gets a bit pricey but with a tune you will get 30hp easy. I found a set of headers and 3" xpipe midpipe for $500 did the work myself. your tune though is where you will be able to bring out the power in the mods you are doing so dont get cheap and skip the tune.
Old 06-19-2012, 03:40 PM
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DARRYLZO6
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Originally Posted by steven31371
Hmmm....I did the zip tie mod with a K&N airfilter, and I cut some holes in the fog light opening and put some of the grill inserts in there for ascetics...I got a lot more than a few HP out of it, and the car sounds much better, It was a very significant differance, but then again, I have a 98 Vert, which about the most restrictive airbox on a C5... so my gains were probably more than you would get on a later model c5 Z06....I agree with your comment about the manifolds and TB though...depending on what car he has In my opinion he can probably get 35-45 hp gain for a little over $1,000 with the zip tie mod and headers...but then he will probably have to spend another $1,000 just to get 10 more HP with an IM and TB.

Its seems like a hard target to hit (50-70 HP), becuase he can soend very little money (less than $1,000) for a 30-40 ish HP gain, or spend several thousand and get to a 70-100 Hp gain

Or spend 6-8k and get 150-175 Hp gain

again...I'm no exiert, just a guy doing a lot of research.

The zip tie mod did wonders on my specific model though....and was a dirt cheap easy mod that woke my car up till I get the SC on there.

As an aside...I also removed the screen from my MAF (very catefully), when I did the K&N and zip tie mod.

He has the 98 c5, it also has the VERY restrictive stock airbox.
If you get any codes, you may have to put your screen back. Ask me how I know.
Old 07-04-2012, 01:49 AM
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Default Zip ties??

Originally Posted by steven31371
Hmmm....I did the zip tie mod with a K&N airfilter, and I cut some holes in the fog light opening and put some of the grill inserts in there for ascetics...I got a lot more than a few HP out of it, and the car sounds much better, It was a very significant differance, but then again, I have a 98 Vert, which about the most restrictive airbox on a C5... so my gains were probably more than you would get on a later model c5 Z06....I agree with your comment about the manifolds and TB though...depending on what car he has In my opinion he can probably get 35-45 hp gain for a little over $1,000 with the zip tie mod and headers...but then he will probably have to spend another $1,000 just to get 10 more HP with an IM and TB.

Its seems like a hard target to hit (50-70 HP), becuase he can soend very little money (less than $1,000) for a 30-40 ish HP gain, or spend several thousand and get to a 70-100 Hp gain

Or spend 6-8k and get 150-175 Hp gain

again...I'm no exiert, just a guy doing a lot of research.

The zip tie mod did wonders on my specific model though....and was a dirt cheap easy mod that woke my car up till I get the SC on there.

As an aside...I also removed the screen from my MAF (very catefully), when I did the K&N and zip tie mod.

He has the 98 c5, it also has the VERY restrictive stock airbox.
I have a 1998 c5 and i installed the vararam cold air intake. whats the secret with the zip ties and air box, i am lost lol
Old 07-04-2012, 10:41 AM
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Originally Posted by steven31371
How much are you spending with install and tune included?

If ya don't mind me asking...
a lot. I am having someone do the work just because I do not have the time or space to even begin.

The car already had long tunes and a FAST. I got the new heads with new dual springs for 1200. Cam was free (228R on a 114 +2) with the install package. 3 piece pushrods were 200. 30lb injectors were like 180. powerbond UDP like 125 etc etc. So far I have 3K in parts and it is looking like about 2K in labor. Not cheap but done by a pro (lashway motorsports in fl lauderdale) so it will be done right and will be tuned well afterwards and they are guaranteeing a car that will dyno 420 or more and drive almost like stock at idle.
Old 07-06-2012, 03:15 PM
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Default zip ties

Can anyone tell me how you can gain 15 - 20 horsepower with the zip tie deal. thats very interesting and seams very cheap for the horsepower gain. almost hard to belive.

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Old 07-06-2012, 10:07 PM
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OK, can someone please explain what the "zip tie mod" is. Some pix would help.
Old 07-06-2012, 10:59 PM
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Originally Posted by MKenM
OK, can someone please explain what the "zip tie mod" is. Some pix would help.

http://ls1tech.com/forums/corvette-p...p-tie-mod.html
Old 07-07-2012, 04:41 AM
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http://forums.corvetteforum.com/c5-z...l?ref=esp-link


make sure to disconnect and reconnect the battery after doing this, so that the computer will relearn the proper air/fuel mix based on your car being able to breath much better.

by disconnecting the battery you are resetting the cars computer, after disconnecting start it up and let it idle for a few minutes, then drive it for a few hours in vary speeds and conditions, i.e. highway and city driving, by the end of the day your car computer will automatically adjust the air/fuel mix for optimal performence based on the opening up airflow.

Last edited by steven31371; 07-07-2012 at 05:00 AM.


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