Hi everyone,


Just wondering if by any chance pulley's are being developed for the LNF. I understand the LSJ has some upgreades for the Eaton, but what about lighten pulley's? Anything being developed? Just curious. Thanks

 

I assume you are talking about the crankshaft and other pulleys on the engine, like underdrive pulleys?

I remember reading an article once where they dyno'd a v8 car of some sort, then removed all of the accessory pulleys (ran with NO accessories) and dyno'd again and gained something like half an HP.

 

not just that article, for every car... Honda's, Cobalt's etc...

They do nothing, it's like a grounding kit

 

hahaha i was so scared at first

 

I had them on another car. No, they don't free up much HP... but they DO free up some bottom end TORQUE.
I'm not saying get them if they come out or something. I probably wouldn't bother. But when I had them I could definitely tell on the bottom end.

 

gotta love butt dynoing

 

It's important too.... not scientific... but important.

 

Maybe important in your mind.
Doesn't hold any value in the real world sorry.

 

Ok then wise guy Cause you've dyno'd them all right? Can't take one and apply it to all. Different engine set-ups have different amounts of drag, etc. Not to mention different brands of pullies like AEM which are garbage.

 

...you just wasted (if you were to buy them) what, 100, 200 dollars on a ricer "get fast quick" part?
of course you're going to rationalize that it made a difference even if it didn't. you just wasted your money.

 

Google it.
I just found an article about an M3. (private owner, not website ad) They gained 6hp. Not much but they DO do something. They didn't show the torque either.
So rationalize THIS for me. Why are people spending $600 on exhaust for SS/TC's that do close to nothing but sound. Same deal dude. No use in the real world as you say.

 

rofl. the internet is not the real world. welcome to a false reality babe.

 

Seeing how the LNF has 2 accessories on the FEAD: Alternator, Air Conditioning, there's no real benefit to underdrive pulleys. The A/C doesn't engage all the time so there's no power loss. You essentially just run the alternator to charge the batteries and provide power for the ignition and electronics.

 

Boy did you miss the point. I was talking about an actual dyno (which if it's not real world enough for you I don't know what planet you're living on)........ I see I'm playing with someone unarmed. The one and ONLY argument that I was making is that they are not useless in every single application.

EDIT: Here's a dyno... http://www.g8board.com/forums/showthread.php?t=3122
Peak hp didn't change but the powerband did. I'll find more if you want... Peak numbers aren't the bread and butter. We don't race at only one set rpm.

 

thats because they didnt have a altanator hooked up and every thing wasent getting enough voltage,fuel pump,etc,not enough voltage to fire the plugs like they should of been wich means not a complete burn.

 

I wouldn't get a crankshaft pulley unless its dampened, and i doubt anyone is making any lightweight dampened pulleys.

 

What's the point of running an underdrive crank pulley when there aren't any accessories to underdrive besides the alternator? I kind of like the radical approach GM took for minimizing the FEAD (front-end accessory drive): cam driven water pump, electric power steering).

 

Alright then, so what I got is they yield little to no power. Awesome, thread is dead. Thanks BABES! LOL

 

for all the non believers just think of a 18speed mountain bike

make the front sprocket(crank pulley) smaller by down shifting

does it take less effort to pedal?

very valid point

 

With turbo cars replacing the pulley can be touchy. By reducing the weight of the pulley, most of the time the harmonic balancer/dampener is removed. This can cause a problem with the crank balance and lead to problems with the oil pump if I remember correctly which will lead to pre-mature engine and turbo failure.

 

i lold'd

 

first off a dyno does nothing... thats like putting a light weight flywheel on and expecting more horse power / tq lol... u just lighten it up creating less spinning intertia... which intern lets it rev up faster. posably not as hard on the motor and i guess if ur into going super super light lol it might help.