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

Best cheap performance mod

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Old Apr 10, 2006 | 12:47 PM
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Default Best cheap performance mod

What is the best performance mod under $300 that I could put on my 1990 corvette conv't Auto?
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Old Apr 10, 2006 | 01:31 PM
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If you don't already own them, a scan tool and a factory service manual would be the best possible ways of spending that money. Get to know each one well

The performance upgrade road is long, windy, and treacherous . Generally, you get what you pay for. In the world of Corvettes, $300 won't really give you a noticeable difference, though a customized tune (NOT a hypertech chip) might be able to get the most from what you've already got.
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Old Apr 10, 2006 | 01:59 PM
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Originally Posted by byebyeL98
$300 won't really give you a noticeable difference, though a customized tune (NOT a hypertech chip) might be able to get the most from what you've already got.


Have Alvin @ pcmforless.com (or somebody local) burn you a chip. If you're still running the stock exhaust, you could also use that $300 or so for some upgrades there.

Last edited by JEFNLSA; Apr 10, 2006 at 02:01 PM.
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Old Apr 10, 2006 | 02:10 PM
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1.6 Roller Rockers and LT4 springs.
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Old Apr 10, 2006 | 02:26 PM
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Alvin's a great guy and I would not want to cost him any business, but you'd really be silly to spend money on a performance chip if your car is stock. Save the chip tuning until you have some performance mods that dictate it and you'll save money and see a noticable difference.
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Old Apr 10, 2006 | 03:17 PM
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Nitrous. You could piece together a kit from various parts off E-bay and your local hardware store for $300.

Other than that, the best gain at the drag strip for $300 would be tires.

I think the most power (other than nitrous) for $300 is probably rockers, or maybe a cheap cat-back system.
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Old Apr 10, 2006 | 04:01 PM
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Originally Posted by Nathan Plemons
Alvin's a great guy and I would not want to cost him any business, but you'd really be silly to spend money on a performance chip if your car is stock. Save the chip tuning until you have some performance mods that dictate it and you'll save money and see a noticable difference.
I know I can pick up even a stock car so if he wants to try it and see how it works for him I'll refund the money if he doesn't like it.

The last stock car I did picked up 17rwhp last wednesday.
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Old Apr 10, 2006 | 04:27 PM
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The best mods for the buck are ones that won't gain you any hp at all, but will make the car quicker.


Gears (about $300 not including labor)

Shift kit

Higher stall tq converter
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Old Apr 10, 2006 | 05:17 PM
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Originally Posted by Nathan Plemons
Alvin's a great guy and I would not want to cost him any business, but you'd really be silly to spend money on a performance chip if your car is stock. Save the chip tuning until you have some performance mods that dictate it and you'll save money and see a noticable difference.
It really depends what you want.

Nathan really knows what he's talking about. But if (like me) you are not a wrencher, and all you want is to spend $200 and get more responsiveness, and a noticeably better top end, I would bet PCMforless (or an equally reputable chip burner -- not a "one size fits all") is the absolute best mod for the money hands down. Do be sure your maintenance is fully up to date, first, otherwise you are polishing a t*rd!

I did it and was amazed at the improvement. Others will confirm this.................
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Old Apr 10, 2006 | 05:44 PM
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If you are talking about performance at the drag strip, then a set of drag radials will help you more than anything else.
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Old Apr 11, 2006 | 05:56 AM
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Let me make a suggestion and also I am going to assume you will do the work yourself and assume you are in a area where smog test are not required.
1. Purchase or find someone giving away a LT1 stock exhaust. Install it and cut and weld back to your existing exhaust close to the motor.
2. Take Alvin up on his offer of tuning with a moneyback guarentee.

These two things should be able to be done for $300.00 if you do all the labor yourself. Next start saving for a set of 1.6 rockers and springs.
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