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I have a '98 C5 (No Warranty), pretty much stock with a Vararam Air filter. Looking for ideas on upgrading. The local Vette-Meister says the cheapest add-ons with the most bang for the buck are performance throttle bodies and mass-air flow sensors. Would like to bolt on mods without adding a blower or nitrous or otherwise doing heavy mods where the engine has to be taken apart, and get as much low end torque and HP as possible this way. I'm fairly new to this, so be kind..any ideas would be appreciated, and my goal is sub-13 on the track.

Cheers,

prodz999
 
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There are so many mods for the C5 that it is hard to choose!

First of all, if you already have a high flow intake like the Vararam, you should change out the factory exhaust system. If you do a full exhaust changeout....headers, high flow cats, X pipe, cat back...you can expect 20-40 more horse power at the rear wheels.

The idea of a less restrictive MAF is a good idea too. I probably wouldnt change out the throttle body if you are not going to be adding a supercharger or turbo to the car.

Good luck and all it takes is $$$$!
 

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BIG LAW MAN said:
There are so many mods for the C5 that it is hard to choose!

First of all, if you already have a high flow intake like the Vararam, you should change out the factory exhaust system. If you do a full exhaust changeout....headers, high flow cats, X pipe, cat back...you can expect 20-40 more horse power at the rear wheels.

The idea of a less restrictive MAF is a good idea too. I probably wouldnt change out the throttle body if you are not going to be adding a supercharger or turbo to the car.

Good luck and all it takes is $$$$!
 

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Discussion Starter #5
BIG LAW MAN said:
There are so many mods for the C5 that it is hard to choose!

First of all, if you already have a high flow intake like the Vararam, you should change out the factory exhaust system. If you do a full exhaust changeout....headers, high flow cats, X pipe, cat back...you can expect 20-40 more horse power at the rear wheels.

The idea of a less restrictive MAF is a good idea too. I probably wouldnt change out the throttle body if you are not going to be adding a supercharger or turbo to the car.

Good luck and all it takes is $$$$!

Thanks. Seems like the experts agree with you, and I found a place (Team Extreme - San Antonio) that will do it (full exhaust changeout plus two dyno-pulls, labor) for under $2K. They say the difference at minimum is 25HP. We'll see. Thanks again.
 

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Black 08, A&A TI supercharger. Kooks headers. CCW wheels. Much more
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aloha,
be careful when you start playing with the Mass Air Flow sensor.i scan my car with Auto-tap,after removing the screen the L-trim and S-trims were ok,so was the o2 sensors.after i ported the crap out of the air sensor and also removing the air foil inside.now i am way lean(almost code).the only way to correct it is to put stock ends back on the sensor.if you read the computer tuning forums,you will find this very common among beginners in the tuning world.also Lingenfelter also recommends leaving the MAS alone.even on supercharged cars.the MAS needs to read the air.remember i was o.k. with the screen removed.i also ported and polished my throttle body.(2000 grit)inside the t-body theres a huge tunnel for the PCV,i filled that tunnel with liquid weld,then drilled a 1/4 inch hole threw to the back.grind the back of the butterfly screws off,and do the coolant by-pass just so its easier to take of the t-body next time.i can take mine off in about 2 minutes.i also have gutted cats(o2 simulators)and halltech T-1 intake with home cut shroud.the car was strong as hell until i ported the MAS.enjoy,Todd.
 

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thanks...

Thanks Todd. I've been doing a little more research and learned the MAS is probably one of last things I should mess with. Probably should leave that to the dealer or a pro, if at all. I'm hoping this exhaust changeout will make a noticable difference without having to mess with the intake unless it really needs it. I'd probably change to a performance throttle body and add a blower, but that probably won't happen until next summer.
 

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prodz999 said:
I have a '98 C5 (No Warranty), pretty much stock with a Vararam Air filter. Looking for ideas on upgrading. The local Vette-Meister says the cheapest add-ons with the most bang for the buck are performance throttle bodies and mass-air flow sensors. Would like to bolt on mods without adding a blower or nitrous or otherwise doing heavy mods where the engine has to be taken apart, and get as much low end torque and HP as possible this way. I'm fairly new to this, so be kind..any ideas would be appreciated, and my goal is sub-13 on the track.

Cheers,

prodz999
Well Im my opinion, your goal is easy obtainable, how fast do you want to go, well how much money do you want to spend??? Its all about the $$$....

Im going to go down the list of best mods in my opinion, if money wasnt a problem and you were looking for a mean street machine, with out doing any internal work or S/C, Turbo, Nitrous (By the way the order is randomly picked

1st - off yes the exhaust is restrictive on a vette plus the sound isnt all there in a sports car sense - (my opinion only) I would look into a set of LT Headers, Hi-Flow Cats, X-pipe and a nice cat back system, something like Corsa.... {can spend an easy 2000.00 here}

2nd - now you can let the are out lets get it in there.... your 1/2 way there.... but i would look into changing out the intake to a newer 01+ this will help a little bit - {$300 - 500 here}

3rd - you never mentioned if your car was an auto or manual - The best bang for the buck in my opinion again - would be a gear and torque converter (if your automatic) this wont add hp but it sure will make you fly!!!! Also if your an automatic - transgo Shift kit is a must big difference with just this installed - {Converter - 600-700 bucks, gear 400-2000 (depending on what size and from where) Install for both at the same time 250-500 bucks}

4th - in my opinion changing the maf or throttle body might be the least thing you would want to do unless you want every ounce of hp out of your car. {IF you decide this route - 150-300 a piece, kinda a waste}

5th - after some of the above mods you will need some tuning, using a person that is experienced with dyno tuning and LS1 Edit
and you will see some nice gains - (again more so if you have an automatic) - but the m6 do pick up a nice gain with proper tuning
{300-500 bucks}

6th - once you get all of this power you will need to invest into a set of tires - For a N/A car i would think a good set of Drag Radials or Nittos would work just fine. {approx. 300}

So hope some of this will help and welcome to the Modoholics anonymous:thumbsup: :buhbye: :cheers:
 

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my name is Todd-and im a mod-aholic.
thats one more reason i like the auto trans,it responds very well to mods.then when your at the track,hood is open,and the guy you just beat is looking at your motor ,you can say,"ya the MOTORS stock accept the air filter".and everyone has an air filter.
later,Todd.
 
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