MrNuke

I just saw this on their website :
http://www.breathlessperformance.com/products/244.asp

Anyone try this yet? What is it supposed to do in reality?

ps.I already have the Air Pump Eliminator on the car.

Wheelman

Good question, i too have the kit on my car. Doesnt seem like it could do much since the pulley is already freewheeling :smash:

MrNuke

That's what I'm wondering too..

65Z01

I have the March steel underdrive crank with overdrive alt pulleys and was wondering if Al pulleys would be more helpful.

I think that all Al pulleys would realy help in 1st gear where the engine is spinning up quickly and any rotary inertia of the pulleys would have maximum drag. But I think that in 2nd gear and above they don't help much.

Botom line the quicker your engine revs the more effect you would get from Al pulleys.

FX GS

Lighten your wallet by $59.99 plus shipping!!

MrNuke

Yeah I have the march power amp alum pulleys on my car also, but the pulley upgrade seems to be just a replacement pulley forthe airpump eliminator kit. Since it is a free spinning pulley, I just don't see what this
'upgrade' would be really good for other than as someone already said.
"Lighten your wallaet for $59.95".. :lol:

65Z01

Even just a "pulley" has some rotary inertia; the heavier it is the more inertia.

And of course the faster you spin it up the more hp it takes to increase it's rotational speed.

I tend to agree that it likely lightens the wallet more than it frees up hp.

BTW, did you see any results on your time slips from those Al pulleys? I didn't realy see any gain from my steel pulley underdrive set.

MrNuke

Unfortunately I did the alum pulleys the same time I did my AFPR, and it was a good 6 years ago, if not more, but I do recall the car feeling faster off the line and smoking up the tires easier after I had it put on. (Yes back in those days I had a shop do the work on the vette) :crazy: