Thread: Pulley for GTP Supercharger

Originally Posted by meshif

Hey guys. Just traded my GT for a GTP and I want to make my super kick in at lower RPM's. From what I've read on here and on other websites, the easiest way to achieve this is to put a smaller pulley on the super input. I was wondering what size pulley is recommended. I want to make my GTP whine at around 3500-4000 RPM if possible. As far as I know, everything in this car is stock.

Thanks
-meshif

I'm not even sure if I know how to properly respond to this post.



Let me help you out kiddo:

TLSheff basically hit it on the head.

Since people don't like to read, i'll spend a few minutes of my life typing this out for you, in a simple form.

You want to Mod: Well there are a few steps that need to take place before you drop pulley sizes.

First thing is first, get all maintenance up to date on your car. Such as plugs/wires (Go with stock Delco/OEM wires from your local Auto parts store), fuel filter, upstream o2 sensor, oil change, SC oil change, blah blah blah and for your transmission.... Do a pan drop and filter change. Do not flush your trans, I repeat DO NOT FLUSH THE TRANS. Learn from my mistake. You can also flush the coolant system. Get rid of the nasty Dexcool sh1t and go with some (Green)? coolant, since Dexcool is known to plug some passage ways. You don't want that.

When that is all completed, now your reading to start modding.

Build your own intake. Its very simple, and there is a step by step process on this website on how to do so.

Buy headers. There are multiple places to get them. I personally have SLP Headers but are expensive, $800 new. Go with Speed Daddy Headers off ebay, or SS Auto Chrome Headers. Both are $225~ shipped to your door step. You can't go wrong.

Buy a Scanner. Such as an Aeroforce Scan Gauge, or a Scangauge II. Typically most people go with the Aeroforce as it can sit in a Pillar/HUD pod. While the Scangauge II is an awkward rectangle size.

Drop to a 3.5/3.6" Pulley. Depending on how much KR you are seeing via your scan guage. Make sure you have a tune lined up when you drop pulley sizes. Custom - In car tunes are the best. If for some odd reason you can't get one. Go with a Canned tune from Overkill Motor Sports and email them with your mods.

When you drop pulley sizes, be sure to change your Spark Plugs to either AL605's or AL104's. You want the "hottest" spark possible, but when your modded, you want to drop one heat range colder with a basic setup. You can also switch to a 180* Tstat. They are useless without a tune. Make sure you have the 180* when you get tuned, so your fan turn on points and what not can get changed. Or, you can always just leave the 195* Tstat in. Whatever floats your boat. Both will work.

When all is completed, you should have a nice Grocery Getter. Roughly 30whp~ increase. Nice little pep to your step, eh? If the mod bug has hit you, and money isn't a problem, now you can get into bigger "Mods" such as a Cam/Heads/Intercooler. But dont really think about that until you first A: Figure our what the hell you are doing, and B: When you have your Basic setup first.

Now, after you have re-read the "Safely Modding Your 3800" Thread about 294,993 times + this post I made for you, and you still have no idea what you are doing, then I suggest you do not mod at all and leave it stock.

Hope this helps a tad. Happy Modding.