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

need advice modifying

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Old Sep 4, 2007 | 09:31 PM
  #1  
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Default need advice modifying

i just recently bought a 89 vette and need advice modifying,preferably to the 11's. i obviously wanna start with the usuals like exhaust, k&n filter maybe cold air intake? need advice on chips, cams ect...basically want best bang for the buck! any suggestions???
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Old Sep 4, 2007 | 11:02 PM
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11's = money.

don't waste on nickle and dime crap. save it up and go nuts.
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Old Sep 5, 2007 | 12:01 AM
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Headers into a high flow cat with muffler eliminators super/mini ram, GM hot cam, 1:6 rr. Ideas.
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Old Sep 5, 2007 | 01:03 AM
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Learn to use the search function, lots and lots of info from past and present posts...
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Old Sep 5, 2007 | 01:59 AM
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do intake and exhaust first as always........it's up to you where you go from there
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Old Sep 5, 2007 | 02:17 AM
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406/Procharger


don't waste on nickle and dime crap. save it up and go nuts.
Leave the car the way it is and slowly do a buildup pan to intake. Weekend swap and youre up again outside of a tune.
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Old Sep 5, 2007 | 08:39 AM
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as other's said.. 11's = LOTS of money.

I really don't have any other advice that wasn't already given.

Save your money.

You can do 12's with bolt on's and nitrous though.. thats relatively cheap as far as cheap HP gains go.
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Old Sep 5, 2007 | 08:49 AM
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Originally Posted by bogus
11's = money.

don't waste on nickle and dime crap. save it up and go nuts.
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Old Sep 5, 2007 | 09:36 AM
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My car is probably 11 second capable, and I don't have a ton of cash tied up in it.

I did headers, cat back, clutch, tires, and nitrous. There's some small other things, but that's pretty much it.

I've been as fast as 12.41, but I've made some changes to the car recently that seemed to have really picked the car up. My best naturally aspirated prior to the recent changes was a 13.3 @ 102. After the changes (a tune and some 1.6 roller rockers) I went back to the track and went 13.1 @ 105. The cool thing is that I was on my normal street tires, not the drag radials that produced the old best of 13.3. My 60 time was off by about 2 tenths and I still put up a new best ET and MPH on motor.

On my drag radials, I should be high 12's NA. If I hit that with a 100 shot like I've been doing, I should be low 12's or maybe even high 11's. If the 100 shot won't get me into the 11's, the 150 will for sure.

Last edited by neat; Sep 5, 2007 at 02:27 PM.
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Old Sep 5, 2007 | 04:54 PM
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everyone says go with headers to catback but i dont wanna weld on the block,it lowers value...

ive alredy planned on getting an intake and exhaust just wanted advice on the best way to go about that

also i want some suggestions on the simplest way to get me that unneeded extra horsepower...like wat to do about cams , r the chips worths the money?,er jus save up and bolt on a supercharger...or all of the above and some
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Old Sep 5, 2007 | 04:58 PM
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Originally Posted by long live rock
everyone says go with headers to catback but i dont wanna weld on the block,it lowers value...

ive alredy planned on getting an intake and exhaust just wanted advice on the best way to go about that

also i want some suggestions on the simplest way to get me that unneeded extra horsepower...like wat to do about cams , r the chips worths the money?,er jus save up and bolt on a supercharger...or all of the above and some
Neither headers or catback should require you to weld on the block, they all bolt right up... As for chips, a custom dyno tune is worth the money after you've done the other mods, it won't really change a stock setup. All above and then some is probably the best answer, speed is addictive but like any drug habit, it can get real expensive real fast.
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