First mod sugg.
Evolving Member
Joined: Jan 2009
Posts: 165
Likes: 0
From: Mobile, Al
No 1/4 mile times, but ran 0 to 60 times with my buddy in the passenger seat and a stop watch; chessy I know, but point is.......... no difference in 0 to 60 times with the new pulley. It is suppose to make the car accelerate faster. but I could not tell. Once the 4b-11 goes into MIVEC mode, it all feels about the same!
Crankshaft - let's say ~50-100lbs so we will use 50lbs for the best case
Stock Pulley - ~5lbs
Total rotating inertia - 55lbs
New pulley with crankshaft - 50.5lbs (4.5lbs lighter)
Now think of a cannon ball and dumbell that weigh exactly the same. it is much easier to rotate the cannon ball because all of the weight is centered and evenly distributed in your hand as it rotates. Most of the weight for the dumbell is farther from the center of rotation which requires more rotating inertia to move it. The same principle applies to the crankshaft vs the pulley. reducing the pulley's weight reduces weight on the center of rotation and not on the throws. Though this will reduce the rotating inertia it has a much smaller effect than reducing weight on the throws which will reduce the rotating inertia more. By the way 50lbs is a very conservative number for the crankshaft. In all it is not enough to "in my humble opinion" feel a difference in acceleration. All you have done is reduce the weight of the car.
Newbie
Joined: Sep 2009
Posts: 10
Likes: 0
From: na
i helped my buddy put on the RRM Lightweight pulley. We did not notice any difference, and I drove his car, which is the same 09 GTS as mine in stick, and I did not notice any difference in power from mine. I would put your money towards intake instead.
Our factory exhaust is pretty streamlined (big piping, goes directly straight down the middle of the car from the exhaust manifold, almost straight out, if you change to an axleback you will have a very streamlined system. Resonators dont' restrict much, so gains from exhaust changes won't be huge on this car with the power its engine can produce.
Our factory exhaust is pretty streamlined (big piping, goes directly straight down the middle of the car from the exhaust manifold, almost straight out, if you change to an axleback you will have a very streamlined system. Resonators dont' restrict much, so gains from exhaust changes won't be huge on this car with the power its engine can produce.
Thread
Thread Starter
Forum
Replies
Last Post
