I'm thinking of getting a Light Weight Crank Pulley (Stock Size) installed obn my MCSa. I mean why not right? Its cheap and install is pretty quick and cheap too. With horsepower increase being about the same as the cheapest CAI. About 5hp and $200. Thats not bad price to hp compared to most mods.

After Randy Webb giving it his blessing I think I'm confident to have one added to my pc. I don't track my car except going to the drag about once a month. I do drive my car hard though.

Any thoughts? I also have many mods ...see sig

 

Should be no problem! I do know that your motor sits slightly closer to the unibody, but I don't think that'll cause any issues wiht the install.

Hope that helps!

Randy

 

Dyno it before and after.

 

The only issue is the auto - it dynos a little weird. I'd be interested to see what it looks like though.

Randy

 

I would love to Dyno my car. Anyone wanna offer up one cheap . I'd love to know what its pushing with my current mods.

Randy if you can update your thread on the Pulley Party Oct in DC I would love to plan to get one installed on my car

 

Will do. Did you specify a time?

Thanks,
Randy

 

Will do soon and Please add the price installed for the pulley.

Thanks Randy

 

An hour plus the part - $85/hour.

See you soon!
Randy

 

Randy,

If a car already has a 15% pulley and a 2% crank pulley is added doesn't that spin the SC at the same rate as having a 17% pulley?

If so, doesn't that go against your advice (FAQ re: SC pullies) not to use larger than a 15% reduction reduction pulley?

I guess the belt life would not be an issue but what about diminshing efficiency due to increased heat?

Any water pump issues?

 

You are basically better off at very high RPM with the 15% and low RPM with the 17%. 17% is just past the ragged edge for efficiency. The most efficient reduction would probably be close to 14.5% reduction from stock.

I didn't find any issues with the water pump cavitating until I tested the 19%, and only then if the car ran above 6500 for extended periods and only then was it reflected in oil temp, not water temp (the oil cooler is a water to oil exchanger with a small volume of coolant).

The biggest issues are the belt, which the crank pulley takes care of, and the efficiency of the Eaton M45 at high boost, which is why I won't go beyond the 2% pulley.

Hope that helps!
Randy

 

Randy,

Do you think getting a OCC would be needed after I get the crank pulley?

 

Randy,

Thanks.

On a bang for buck basis and also taking into account potential reliability issues how would you rank the following common performace mods in order of which you should do first, second,etc?

SC pulley, CAI, TB, Crank pulley, IC, cam, ECU remap, exhaust, cylnder head, headers, water injection.

Thanks - I promise no more questions.