legacycentral bbs

I am trying to do small things to my engine at first before i get into the heavy duty stuff. Upgraded my fuel pump, de-snorked my air box and added a k&n filter, upgraded the plug wires to 9mm, etc. I have seen under drive pulley kits for all cars i have ever tuned, but have never used them before. So i am curious as to what your opinions are of them and their pro's and cons to helping tune a vehicle, or if they are just somehting shiny to put on the engine.

I'd suggest a lightweight pulley but not underdriven. The gains mainly come from the reduced mass on the crank.

I swapped an Unorthodox underdrive for a Cobb lightweight and noticed better headlight brightness and idle at nights, especially in the winter with the heater on.

So no actual power improvements with an underdrive.... Any other similar add on's that people have used for bolt on power?

DLC wrote:I swapped an Unorthodox underdrive for a Cobb lightweight and noticed better headlight brightness and idle at nights, especially in the winter with the heater on.

I added an aftermarket voltage stabilizer when i wired my system and it improved my lights.

It kind of depends on what you consider "bolt on". I consider everything that doesn't mean breaking the block down.

You can srart with a K&N air filter, better flowing exhaust, add a lightened pulley, and sorry didn't notice if you had a 5sp or not - if so..add a lightened flywheel. It shoudl get you a bit more power. Especially after adding an IC and boost controller.