Underdrive pulley...

[iwaslowr]

Has anyone done this mod?

 

[emann_01]

Does someone make one?

If so, who and how about a link? Price?

I have done this to previous vehicles I have owned and it helped with power and MPGs.

 

[iwaslowr]

Here are a few links...
http://marylandspeed.com/slp-harmonic-balancer-underdrive-pulley-19992008-gm-full-size-truck-suv-48-53-and-60l-v8-slp100230-p-1383.html

http://us.lrd.yahoo.com/_ylt=A0geur8pjjRKnlQAvLhXNyoA;_ylu=X3oDMTBybnZlZnRlBHNlYwNzcgRwb3MDMQRjb2xvA2FjMgR2dGlkAw--/SIG=11u5jon0r/EXP=1245044649/**http%3a//www.lmperformance.com/15955/27.html

http://us.lrd.yahoo.com/_ylt=A0geur8pjjRKnlQAwLhXNyoA;_ylu=X3oDMTByamlqaW9mBHNlYwNzcgRwb3MDMwRjb2xvA2FjMgR2dGlkAw--/SIG=11p465pbc/EXP=1245044649/**http%3a//www.rpmoutlet.com/gmsuvasp.htm

http://www.neweraperformanceparts.com/default.asp?S=503&A=E&PKV=pbud25tr|0

 

[JennaBear]

I have an overdrive pulley on my Tahoe.

 

[iwaslowr]

I have an overdrive pulley on my Tahoe.

Which did you go with? I meet with Justin Friday and am planning purchasing one and having it installed before then.

 

[JennaBear]

I have the one we sell

 

[J-Will]

I have an overdrive pulley on my Tahoe.

whats the diff between an underdrive pulley and an overdrive pulley like you have? sorry im clueless

 

[JennaBear]

The underdrive pulley is for the crank and the overdrive pulley is for the alternator.

I have e-fans, so to compensate for the needed amps, I put the overdrive pulley on, helps with the idle amperage for folks with larger stereos or e-fans. I have since gone to a 250amp alternator, but still have the pulley on there.

The underdrive pulley is on the crank and essentially slows down the belt, which can get you a few extra ponies, nothing drastic though.

 

[Denali---LQ]

did anyone see any difference in anything with this pully ???

 

[Conor]

$200 is a lot to pay for 4 HP on the wheels. Pretty sure you would never notice it. Money is better spent on letting them breath easier and juicing them up with a BlackBear.

 

[iwaslowr]

did anyone see any difference in anything with this pully ???

I have noticed a difference on previous vehicles. Ordered mine today... and will let you all know once it is installed.

...Money is better spent on letting them breath easier and juicing them up with a BlackBear.

Both FTW!