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I have 89 coupe. Automatic, 48000 miles, other then open lid K&N filter it is stock with no problems. Other then sound better, will I gain enough power that I will notice, if I remove pre cats, change out main cat and mufflers to better flow design. Don't mind spending money if I think it would be worth it
Yes, you will notice a difference because there will be. The stock exhaust on these cars is too restrictive. While you are at it, look into some long tube headers. Also, if you haven't already, get the 3 piece under drive pulley set and you will be very pleased.
I have my doubts about an actual gain you can notice. Placebo effects sure. if you want meaningful gain, are you willing to do intakes, headers, dyno tuning?
I have my doubts about an actual gain you can notice. Placebo effects sure. if you want meaningful gain, are you willing to do intakes, headers, dyno tuning?
unless you are willing to go all out on mods.
leave the vette alone!!
Enjoy the car just as it is, modifications sometimes result in side effects problems.
If your car is in good shape.
leave it alone
I had no cats and adjustable power effects exhaust. So I could turn a **** and go from restricted to straight pipes anytime I wanted. I noticed no real gains between stock and gutted cats with straight pipes. I did notice a difference with between the silent setting and straight pipe setting on the power effects itself but its wasn't more power than it had stock vs the wide open setting.
So no you will not notice anything power wise sotp. You might pick up a bit in the 1/4 mile but I doubt its much. I cant remember seeing anything noticeable. Is a ton louder if that's what your after.
Supercharge it, get a nos setup or do a 383 build if you want real change.
leave the vette alone!!
Enjoy the car just as it is, modifications sometimes result in side effects problems.
If your car is in good shape.
leave it alone
Sure adding a few bolt on items will get you a few hp , but nothing that's going to make a dramatic difference...To get real gains you have to spend big money, and unless your willing to do Heads , cam ,intake, headers, exhaust, and a tune, then I would have to agree with the guys above....Just leave it alone and enjoy driving it .I have heard quite a few guys say that they wish they had left their cars stock ......WW
Thanks. Good advise. Guess I will just leave it alone
It's like everything else. You can't do it piecemeal and expect great results. Put on sweatpants and a T shirt and tell me how much better the world's best custom shoes will make you look.
Everything you do has to be systematic. Once you expand one part, it will stress the system and find the weak spot. In my case, it was the GM 7.625 rear end on my 91 Firebird and in the Vette, the D36. You must consider it from air filter to exhaust tip. Improve the air filter and throttle body means nothing if the manifold doesn't use it right. Go all the way to the heads and if you can't exit, worthless. For a start, I would do an intake with headers and a dyno tune. After that, you can see how much further you want.
If you add up all the power I should have as advertised by the manufacturer, I probably have close to 2000 HP. It has to work as a system.
It's like everything else. You can't do it piecemeal and expect great results. Put on sweatpants and a T shirt and tell me how much better the world's best custom shoes will make you look.
Everything you do has to be systematic. Once you expand one part, it will stress the system and find the weak spot. In my case, it was the GM 7.625 rear end on my 91 Firebird and in the Vette, the D36. You must consider it from air filter to exhaust tip. Improve the air filter and throttle body means nothing if the manifold doesn't use it right. Go all the way to the heads and if you can't exit, worthless. For a start, I would do an intake with headers and a dyno tune. After that, you can see how much further you want.
If you add up all the power I should have as advertised by the manufacturer, I probably have close to 2000 HP. It has to work as a system.
Would that be 2000 hp at the crank, or the wheels.......Sorry, I couldn't help myself...Again.....WW
Piecemeal can be done well, but usually has no end. I realized a definite improvement in performance with headers and less restrictive (usually louder) mufflers. I very strongly suggest ceramic coated headers, though, as many plastic things, like wire connectors, start to melt from the high underhood temperatures. otherwise.
The good news (maybe) is that exhaust would be part of any more substantial "system" modifications you later do.
I say maybe, b/c enough is not in MY vocab!
It's like everything else. You can't do it piecemeal and expect great results. Put on sweatpants and a T shirt and tell me how much better the world's best custom shoes will make you look.
Everything you do has to be systematic. Once you expand one part, it will stress the system and find the weak spot. In my case, it was the GM 7.625 rear end on my 91 Firebird and in the Vette, the D36. You must consider it from air filter to exhaust tip. Improve the air filter and throttle body means nothing if the manifold doesn't use it right. Go all the way to the heads and if you can't exit, worthless. For a start, I would do an intake with headers and a dyno tune. After that, you can see how much further you want.
If you add up all the power I should have as advertised by the manufacturer, I probably have close to 2000 HP. It has to work as a system.
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.
Is it worth the money
..Sorry, I couldn't help myself...Again...
..WW
