C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Looking to increase performance, need opinions

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Old Apr 17, 2012 | 12:56 PM
  #21  
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Originally Posted by Heimlich2010
my opinion. I wouldn't waste my money modding out a L98 TPI. The TPI intake is **** period. until you change the intake your wasting your money on useless mods. the C4 corvette with a L98 with a TPI motor is slow no matter what you do to it.
I put the Accel Lingenfelter intake on mine and wouldn't do it again because it's ridiculously hard to do. Check out TPIS for their intake (Miniram?). I do REALLY like how my intake works, though. I now can accelerate at WOT and not feel the car drop off after 4K rpm. It 'hauls like a freight train' now!
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Old Apr 17, 2012 | 12:59 PM
  #22  
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I'd switch to an electric water pump if possible.
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Old Apr 17, 2012 | 01:44 PM
  #23  
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Originally Posted by alexmurphy
So I'm planning on doing some modification on my corvette. I've got the l98 with an auto transmission. I have a rough idea of what I want to do, but I am completely and totally open to comments and constructive criticism here. Primarily I'm looking to boost my hp and torque numbers. I care less about top speed and more about acceleration. I want a car that will be fun to drive every day, yet easily pass some d-bag on the highway, or maybe take to a strip now and then.

My plan was to start with some long tube headers, then go for either a Corsa or SLP exhaust system. I know this will make my car sound great, but I won't be able to do this for a while, I work mostly in the summer and its still a lot of money for my budget. I'm also considering getting an SLP claw, but I don't know how well it will fit on my car (it's made for an lt1). Lastly I'm going for 3.73 gears. Now, question time

1) is it possible to put the headers on with the stock exhaust before swapping for a new system? I don't know if the installation involved welds or anything. If possible, I'd like to install them myself, but I don't know how that process works.

2) Corsa or SLP? (or other)

3) Is there anything I should know about installing the ring and pinion? Also, where to buy, should I be looking for a specific brand?

4) Are there any other modifications that you would suggest? Like I said I want higher hp and torque numbers, but I don't want to do anything huge like installing a supercharger or something. Keep in mind I have a tight-ish budget.

5) after I install these parts, do I need to do anything else, or will everything work like it should right away? I know I'm not adding hundreds of horsepower, but will the transmission be able to handle the extra power alright?

If you have any general input of any kind, please let me know. I want opinions.

Be gentle, I'm a noob. I've been starting a lot of threads lately because I'm trying to figure out what's best for my car, so I want to get everything straightened out now, so I don't have to worry about these questions later.

Thanks in advance to anyone who helps out
How much is in the budget for added performance.
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Old Apr 17, 2012 | 02:56 PM
  #24  
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Originally Posted by illenema
How much is in the budget for added performance.
exhaust work aside, maybe 2000, 2500 tops.
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Old Apr 17, 2012 | 03:06 PM
  #25  
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Originally Posted by blakngold4life
There are a couple things you should specify before anyone can really help you out. 1)What is your goal for the car? What do you want the car to do? Drag-strip/Autox/Road Course/ weekend street car/ Daily driver or any combination. The type of modification you do to get the power you want and what sacrifices you will make differ with each application. 2) What is your budget, an exact number that you dont want to go over. To some people "cheap" or "budget" means $1,000, to others it is $10,000. 3) How often do you plan on working on it aka reliability? You say you can do your own work, which really helps because labor is going to cost as much, if not more, than parts if you take it to the shop. After you figure these things out, pick some keywords and use the advance search function, all this info is there for any application, you just have to learn what to search for.
I answered most of your questions in response to other people in this thread, but just to be clear, ill go over it one last time

1) Street mostly. I might take it to the track once or twice, but never anything serious.
2) between 2000 and 2500, exhaust work aside.
3) I'm okay with working on it, but I want to spend more time driving it than working on it. This is my daily driver. I can work on a lot of stuff myself, but certain things I know will need to be done at a shop
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Old Apr 17, 2012 | 03:11 PM
  #26  
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Will it have to pass smog?
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Old Apr 17, 2012 | 03:16 PM
  #27  
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No it doesn't
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Old Apr 17, 2012 | 03:25 PM
  #28  
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Do all in one swoop. heads-cam-intake.
Get the heads CNC ported, cam the match the heads, Intake.
Do it responsibly, not to destroy your lowend torque.
You wont want to have to wind it up to get anything out of it on the street all the time. A good setup will be brutal to the vette drive train.
Buy the head porting/cam from a pro shop as a package.
Have Fun and take your time.
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