Will it be worth changing the crankshaft pulley. CED sells it for $583.20. I talk to a corvette guy and told me gains should yield somewhere between 19-23HP. Is there anything should I worry about if I get it installed? Before this I will be buying a CA Heat Exchanger. Hope you help me. BTW, I found these websites. Very nice.

http://www.livewirerodimus.com/Ecotec/
http://forum.jbodydeltaquebec.com/vi...2bc5deb77ead9c

Thanks
Jose

 

i'd say more like 4or5 cause we dont gain as easy with a 4 banger and a v8 does

 

waste of money, put 500 bucks towards something more effective like tuning.

 

^^^ Good Advice ^^^^
Reducing "reciprocating" mass such as pistons, rods, crank throws etc etc will show gains like that but reducing rotating "balanced" mass, much less so.
You might not even be able to measure the effects of installing JUST a billet crank pulley on the dyno...
WopOnTour

 

Anyone know if I need additional parts?

 

please don't get this invest in a custom tune for that much

 

Money is not an issue for me. I'll get the tune sometime this year. I just want to mod first. Once again, does anybody know if I need additional parts?

Thanks

 

you want power pulley down get a custom tune full exhuast and meth if money isnt a issue

 

there are cheaper eco crank pulleys than the GM one

 

not for the 2.0 i did not know anyone made them before this post

 

Well, If I go down on pulley will be a 2.8". I know I will be revving faster with the smaller crank pulley and thus more gains.

 

you will get the same results from going to a smaller pulley you will still be spinning the s/c faster

 

RSM racing makes one, custom grills or something makes one, and i have seen them else where

 

sounds useless to me

 

Which brand? Where can I find it?

 

look up RSM racing

 

Underdrive from the crankshaft pulley means the pulley is smaller that the original pulley it replaces. Underdrive from the accessory pulley means the pulley is larger than the original pulley it replaces. Originally they were invented for race cars in the 1950s and 60s, whose engines had been modified and ran at higher RPMs for longer periods of time than the manufacturers had intended.

HP gains from being lighter can be significant, from 4-14 HP for normally aspirated engines to 12-25 HP for forced induction engines.

 

i know what the part does don't you think there is a reason they have not made it yet if it makes so much power

 

Ecotec Billet Crankshaft Pulley 88958631
Item #88958631
88958631 Ecotec Billet Crankshaft Pulley
MSRP: $729.00 Your Price: $583.20

 

i know gm made it but you will not use that part unless you are going with a very high hp application where you are probably ditching the blower. If its a smaller pulley s/c or crank it will spin the s/c faster cuase more heat so what little power you will make will be signifacantly reduced by the heat

 

Even if I stay with the stg 3 pulley?

 

yes becuase you will be spinning the blower faster if you pulley down or get that pulley, so why not spend $50 to make the same realiable power as you would with 500

 

Yeah, I see your point. I'm thinking, let's say I change the crank pulley, the s/c will spin faster (and maybe raising boost to 17psi, just and example). Now, we have less drag from the a/c and alternator. On the other hand, I change to a 2.85 pulley, for example, raising probably boost to 17 psi. I think, even though there is much heat created by both mods, by changing the crank pulley will gain more (just a little bit, maybe 10hp) than changing the s/c pulley. Difference here is what you suggested, $$$, from $50 to $500 its a lot.

Thanks

 

yeah just trying to help don't worry about that a/c and crap the gain will be minimal on our 4 banger s lol

 

for our cars your going to want a stock size lightweight crank pulley, if you get one of a different size your going to run into problems else where with the s/c