hey guys, does it make a difference to put one of these on??

and whats the most you can 'safely' do without putting an intercooler in, it says to do a 3.25" one on ebay without an intercooler, that as soon as you go to a 3" one you will need an intercooler

anybody know??

anybody have them??

thanks

Josh

 

Yeah, I would avoid that ebay recommendation and follow these general guidelines.

Completely stock, I would only do the 3.5 inch pulley from slp-online.com otherwise I got the following from w-store and this is a pretty good guideline.



What size pulley can I run on my car? - This is a very difficult question to answer as it varies from car to car and modification to modification. We can give you some popular setups and what they will allow you to do but we strongly suggest scanning for knock both before and after installing your new pulley. Please keep in mind the formulas below are based on a Gen III supercharger (97' - 03').

(3.5 - 3.4" pulley) - Cold Air intake, U bend/ downpipe replacement, DHP PCM, 180 degree thermostat, Autolite 104 plugs
(3.3 - 3.2" Pulley) - All the above plus: Rockers or a mild cam, ported manifolds or headers
(3.1 - 2.8" Pulley) - All the above plus: More aggresive cam or intercooler, ported & polished heads, more specific tune (PowrTuner)
(2.7 - 2.6" Pulley) - All the above: More aggresive cam and intercooler.
Please note: Pullies under 2.8" require snout machining.



If you live in the colder states like WI, MI, MN, NY, etc, you can get away without changing the plugs, stat, and DHP PCM. I would recommend running 93+ octane at all times though. I don't have a problem with this in my area as we have 93 all over. Once you get below 3.2 I would strongly recommend the intercooler and not chance it unless your hardcore or have deep pockets. Mine is a daily driver so I'm topping off at 3.4 inch.

 

Forgot the performance portion. The 3.4 inch pulley will increase HP by about 25-30. Add on the cold air, u-bend and catback and I believe you increase to a total of around 40 - 50 hp total. So the stock 240 HP jumps to 280 - 290.

Once you hit 3 inches, it really isn't worth upgrading anymore unless you have something to prove or very deep pockets. This is also why most people stop at 3.4 inches or 3.2 if they more dedicated.

If you plan on going lower to hit 12 second 1/4 miles then just start preparing to drop about 6 grand on the engine and get headers, ported manifolds and either the cartuner turbo, stattama turbo, or whipple supercharger.

I currently run the Wizaired CAI, Random Tech HiFlow cat with Ubend removal and Dynomax mufflers. I should be getting my 3.4 inch pulley by Thursday with the puller tool. I plan on upgrading the rockers to the SLP brand on 3800performance.com and maybe the DHP PCM... I really don't want the firmer shift points or higher tranny pressure.

 

thankyou

i dont know what i have planned for this car, i was just thinking cold air intake and the smaller pulley..but then again who can ever stop doing stuff like that once they start

 

didnt see it listed, but i would say below the 3.5 or 3.4 its strongly recomended to get new injectors. the stock flow rate just isnt enough to make the car relyable

the stock are 36 lbs and most people get 42 lbs i would also say a DHP power tuner is a must. even on a stock engine there is power to be gained.

 

I've heard of people upgrading their injectors to 42's, but it usually is done at a 3.00" pulley. I would also recommend the scanner as well. If you are looking to only be worried about reliability and not programming, http://www.ls1m.com/ has a software program you can download to a palm pilot or laptop and a cable to connect it to your ODB2 port in the car and cost's $150 I beleive. I am emailing him now on this. If you don't have a palm, you get get them for real cheap on E-Bay... like $15 to $20. This will also clear check engine light codes.