PiotrC70

I see some of you have that written. Is it just the underdrive pulleys that you can order from like unorthodox or something, or is it a custom mod... thankx

vapors smx

The 3.48 pulley is an upgraded pulley from Vortech directly. It increases your boost from stock and costs around 70 dollars from them. Boost goes from 5-7lbs. You must take the whole sc off in order to change and loctite is a ***** on the bracket bolts. Hope this helped. BTW we are going with 3.33 before stillen day. close to 9lbs I believe.

PiotrC70

Is there any problems associated with doing this for daily driving? If you only get about 7 lbs from 3.48 why not just drive on the 3.33 pulleys everyday...???? Thanks

vapors smx

The reason we are doing this step by step is to make sure our tranny can handle it. That is the weak link. When we got the stock sc we pounded on it until we were both sure that the tranny would hold up and also because we were yearning for more kick from the car. We have done the same with the 3.48 pulley. We have had it for about 3 months and have really, really pushed it. We figure that we can go one more pulley with our tranny handling it(KNOCK ON WOOD!!!). We may stop there for it is believed that we would have to toughen up the tranny(rebuild?) in order for it to handle the lower pulleys(2.87 etc). BTW the 3.48, 3.33 etc are measurements of diameter of the pulley. The smaller the pulley the faster spinning the blades of the sc, the more boost produced. It also cuts down the rpm needed to generate boost. Again I hope I have answered your questions.

BTW it is daily driven, it just makes life a little more exciting when you increase the boost/change out the pulley.

PiotrC70

=Þ

bigtexan7

How much HP did the supercharger w/3.48 pulley add to motor?
...and how much was added by going from 3.48 to 3.33(5-7lb)?
also is the trans. an auto or a stick? thanks

PiotrC70

Going from stock to 3.48 pulleys, it's good to about 10-15 HP unless someone can correct me on that.. that's what I thought I read on here somewhere....Another question though, to my understanding, isn't it supposed to make your electrical system run better because you're not using so much power to run everything. With smaller pulleys, ex. 3.48 to 3.33 wouldn't it somehow over work your electrical system or am I thinking of something else??? Vapors, if you can answer this, you're the S**T...

1MAX2NV

iTrader: (5)

The crank pulley is the driving force. The alternator has it own pulley, so does the SC, powersteering and AC. As long as the crank pulley is the same, the rest are independent of each other.

vapors smx

Moving from pulley to pulley adds only about 15 hp to the wheels, however(THIS IS IMPORTANT) it allows the sc to spool up more rapidly. When it spools earlier it helps your acceleration. The sc pulley, much like 1max2nv said, does not really help withthe electrical because they are independent of each other. Hope I helped.

BTW. 10-15 at the wheels doesnt sound like much, however with the sc spooling much more rapidly, allowing you to accelerate faster, it feels much more powerful.

[Edited by vapors smx on 12-27-2000 at 07:42 AM]

SteveChicagoSC

We all know the trouble of swapping out pulleys. The .08 diff might be worth 5 - 10 hp. Just a thought....

vapors smx

Hey steve,

I was seriously thinking about that. I was just unsure if we could handle that boost without doing some tranny work. Would I need to do anything to prep the car for it? Our tranny has had no problems with the upgraded boost and we do abuse it(no neutral drops though LOL). Do you think we could handle it? I heard that I would have to change the plugs. Our fuel is handling it, we are running very rich right now. Let me know what you think. We are going to change the pulley very shortly and would like as much input as possible especially from people like you or loren or others who have changed out the pulley. Email me sometime too or do you have icq?