3.4 pully gains (I searched)

[andrew.brandon]

I am wondering what the hp gains are for just the crank pully. I plan on putting my system back in so i don't think I want to get the alt pully. any guesses? I am thinking 5-7 hp.

[viper98885]

Those numbers sound about right. It is definitely worth the time and money. It is a simple upgrade and pretty inexpensive.

[Fredless]

http://www.fl-thirdgen.org/underdrive.html

Read the last paragraph. I know him personally and he dyno's his cars a lot. The 3.4 seems to love underdrive pulleys.

I think they are a worthwhile mod for a 3.4

Good luck. :D

[94TeaL]

The one bolt on i dont have :{

[andrew.brandon]

Originally posted by Fredless:
http://www.fl-thirdgen.org/underdrive.html

Read the last paragraph. I know him personally and he dyno's his cars a lot. The 3.4 seems to love underdrive pulleys.

I think they are a worthwhile mod for a 3.4

Good luck. :D

Thanks that was informative. [img]smile.gif[/img]

[zlightning]

Do the after market pullies weigh less too? I've never delt with them so don't know. Only thing I know is that the water pump pulley is much heavier then it needs to be for the 3.4.

[wolf]

Originally posted by zlightning:
Do the after market pullies weigh less too? I've never delt with them so don't know. Only thing I know is that the water pump pulley is much heavier then it needs to be for the 3.4.

yup, my hypertec pullies (alt & crank) with the belt, and in the box are lighter than the stock crank pully

[95Batmobile]

but they won't work if you have a big stereo :(

[viper98885]

Yeah, they will work. I would not suggest doing the alt pulley though with the big sound system. The crank would be okay though.

[zlightning]

You could also just buy a higher amp alt.

[StudlyCamaro]

the air was probably different , but i know my times were roughly the same before and after i installed my under drive crank pulley and removed the AC system

[CAMAROWIDBASS]

I run a ;arge system and i tried runnin just the crank pulley but my volts would drop too much. So i had to take it off.

[pontiac nino]

Originally posted by CAMAROWIDBASS:
I run a ;arge system and i tried runnin just the crank pulley but my volts would drop too much. So i had to take it off.

Sell it!!! :D I may know someone *ahem who might be interested. [img]smile.gif[/img]

[BradC]

Is a new belt required for the crank and/or alt pulleys or can I reuse the old one?

[pontiac nino]

Originally posted by BradC:
Is a new belt required for the crank and/or alt pulleys or can I reuse the old one?

New, smaller belt cuz the pulleys are smaller.