2005 SuperCharger Pulley
 

I have a guy at work that told me I could swap out my stock pulley on my SuperCharger for a smaller one. He stated I would get more boost and in return about 50HP. Is this true? What can I do to get more HP out of my Monte Carlo? It is a 2005. If the pulley swap is the answer, were can I go to get one and what is the rough price? I have had a lot of Mustang GT's and Cobra's and this is my first Monte Carlo. I truely love the car and would just like to do some simple, inexpensive mods to it to increase HP with harming the motor or car. Thank you very much.

Mark Christopherson
Forest City, IOWA
Mpeterbult777@live.com

yes that is true that you can swap the pulley. Having owned a cobra I am surprised that you hadn't heard that before. In order to swap pulleys you will need to do some supporting mods which will also lead to more horsepower.

Pulley Swap
 

My Cobra wasn't SuperCharged and I have heard of it but just never believed it. What sort of supporting mods and what sort of price tag? Thank you.

Mark

50 hp for a pulley swap? i don't think so. i hope you plan to add supporting mods when down sizing pulley. btw what size of pulley your co worker told you to use?

Pulley Swap
 

Hi Byron. If you read my first post with the question, it says a guy at work said it. I don't say I believe it. I have allways had fast cars from the jump. He stated 50 HP. I don't think so either. I also didn't give a lot of gravity to him so I didn't ask what size. I asked here thinking people would know what the heck they are talking about. As for supporting mods, if you read my second reply it says, " WHAT SUPPORTING MODS ARE NEEDED". So asking me what I am going to do is a waste of time as I don't know what they are. Thats why I asked. As I said, I have allways just bought fast cars, Mustang Cobras mainly. Maybe I should have went that route again as getting answers form people in fourms is like pissing in the wind. If you have an answer just post it . Here it is again, WHAT SUPPORTING MODS ARE NEEDED and what pulley size?????????? Also how much more HP?????????? Thats pretty plan I think.

LOL does he drive a grand-prix?

Just look at the exhaust / intake section, there's a sticky on how to build up your 3800 engine. Look at the L67 part and have fun. You will need a lot before you think about dropping pulleys. Also get a way to scan for Knock Retard (KR), you will need 0° of KR before you drop a pulley size.

Headers, ported/larger throttle body, aftermarket cam, colder air intake, 3" exhaust, colder spark plugs are all "supporting mods". Make sure you scan your KR before dropping pulley sizes though - KR = detonation = you will blow that bitch up.

180 T-stat and colder plugs are also needed.

Pulley Swap
 

Thanks Nitehawkjcb. That was what I was looking for. ANSWERS. If you have time, could you email me some to the things you mention in detail? I understand all of them but as far as a throttle body, what size and out of what? Exhaust I understand. Those are things I have done myself. Cold Air intake such as a K&N Cold Air Kit? Thank you again

First of all, try posting in one of the engine sub forums instead of general tech- you'll get more engine specific people in there. Also, if you checked in those sections, you'd see the 3800 mod plan sticky that chibi posted

Secondly, don't get crappy with the people on here, or you won't get any help- same goes for any forum. Getting super defensive in your 3rd post on a forum is a good way to get kicked out. Some people just don't read posts all the way through before they reply.

Read the sticky that chibi posted- and do some searching, all of the info is already out there without nitehawk having to retype out stuff that is posted all over these forums.


We can't tell you exactly what mods to do, or what size pulley to get because you haven't told us what you want to do at all. We need to first know how much you want to spend, and how much power you want, then we could give you a more specific plan. Because the difference between putting on a 3.4" pulley and a 2.55" pulley is night and day as far as 'supporting mods' go, and also as far as budget goes (stock pulley is 3.8").

Nitehawk was just generalizing the basic 3800 mods, some pulley sizes require all of them, some of the pulley sizes require almost none of them- hence why we need more info from you 1st. No one wants to waste time telling you how to run a 2.55" pulley if you're only looking to spend $1000, you know?

I feel for you
 

If all you have is a CAI on a 3.4 you are going to lose your engine quickly.

x2 scary thought.......I have CAI, 605 plugs, 180 thermostat, GMPP cat back, 3" catted DP soon, and I want to drop from a 3.8 to 3.6 safely, I think 3.4 would be out of the question for me.

Trust me you will have no issues. I have had this setup for over a year running 93 oct fuel. I don't drag race and rarely dog it out but I know I have the power if I need it. If you want to drag the car on weekends go with a 3.5 and 93 oct fuel.

anythings possible as long as u have working knock sensors and some way of scanning the car. first mod that should ever be done is adding a scanning device of some sort. i picked the aeroforce gauge Aeroforce Technology - ARF - ARFFD - Aeroforce Interceptor Gauge - Displays Different Engine Parameters & Trouble Codes
one of the few respectable suppliers of 3800 parts
ZZ Performance
here is a good read for the beginner
ZZ Performance

apparently you can't ask questions because someone is super vague, to try and help that person out lol

Ultimately, bumpin is the guy to listen to IMO. But 50 HP is do-able on the pulley swap if all the supporting mods are in place (to keep from blowin' up). But it is more complicated then just that. To the MCF, bumpin96monte wrote the book in this stuff. Chibi posted the link.

lol @ everyone- check the dates this was posted, my last post in here (post #11 was on 3-11-10), and Butch6 bumped it by replying on 3-25-11. So I'm sure the OP is either long gone, or has done the reading by now.

As for the other funny post above:

I totally agree with chibi- a CAI and 3.4" is definitely going to knock on any L67 I've seen. You say there are 'no issues' but have you ever scanned the car for KR? You know you can't actually hear modern cars pinging because the pcm tries to pull timing before it chips a piston (which doesn't always work due to the tiny top ring land to top of piston distance to please emission standards).

If you really honestly have 0* KR all the time on that pulley and with a CAI as your only mod, then I'd say either you're running a higher octane fuel (ie unleaded race gas) or your knock sensors or wiring are dead.

D'oh!