Pulley questions!
Thread Starter
Instructor
Joined: Sep 2009
Posts: 213
Likes: 4
From: Springfield Kentucky
Pulley questions!
I have a 2006 ZO6 with 110,000 miles on it. It's bone stock and the car is in excellent shape and I keep it well maintained. I bought an ECS Paxton kit pullied for 6~6.5 psi. It comes with a small pulley (3.31) and a restrictor plate but my tuner seems to think I should go with a larger pulley (4.5) and no restrictor plate to keep higher boost levels out of the mid rpm range. What do you guys think?
My tuner is a very knowledgeable guy with experience in FI cars and a lot of LS cars, but so are ProCharger, ECS, and Magnacharger who all say I should be fine.
My tuner is a very knowledgeable guy with experience in FI cars and a lot of LS cars, but so are ProCharger, ECS, and Magnacharger who all say I should be fine.
Le Mans Master
Joined: Aug 2002
Posts: 8,472
Likes: 38
From: Houston TX
St. Jude Donor '11
He's wrong. The restrictor plate and smaller pulley would give you more boost/power down low because it's spinning faster and that is a good thing. Why would you want to have less boost in the low/mid range? As long as it doesn't exceed what you want your max to be (6-6.5#)?
Thread Starter
Instructor
Joined: Sep 2009
Posts: 213
Likes: 4
From: Springfield Kentucky
I think he was worried about that much boost at low rpms for the load the motor was under. But this is my first FI car and I'm new so I needed more opinions because I sure would love to see this car make it off the dyno lol
Pro
Joined: Jun 2008
Posts: 672
Likes: 1
Sounds like your tuner is worried about the 110k miles. Hopefully you have plan B (shortblock fund) in the works. Because at minimum boost, you will want more. Just a matter of time. Boost is addicting!
Last edited by Slwsvt; Apr 7, 2011 at 04:42 PM.
Thread Starter
Instructor
Joined: Sep 2009
Posts: 213
Likes: 4
From: Springfield Kentucky
If I can make it the better part of a year on this setup, I will be happy and a lot more ready for the shortblock but I'm lost on that right now. What are most people running? LSX block and stock crank hold much boost if I trash my block?
Melting Slicks
Joined: Dec 2002
Posts: 2,897
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From: Lone Star State
Stay with the alum. block platform and go ERL or RHS. I'm using my stock block ls7 but fully forged and made 850rw so far. Hoping for more soon...
I would use the restrictor plate and your 3.31" pulley that comes with the kit
I would use the restrictor plate and your 3.31" pulley that comes with the kit
Thread Starter
Instructor
Joined: Sep 2009
Posts: 213
Likes: 4
From: Springfield Kentucky
Thanks again guys for all the quick responses. After several set backs and only being able to work on weekends, Saturday I am taking the car to get tuned. I am trying to meet my deadline so I can drive it to the Rod Run show in Gatlinburg TN next weekend!
