In the interest of pursuing more power along with further testing the capabilities of the blower I got the higher boost pulley in yesterday.

Comptech did a wonderful job in making a kit for all states. But knowing where they are located and the gasoline available there I know they are being conservative (and rightfully so). I live in a part of the country which has the best prices and quality fuel available. Not to mention I have been running lower ECT temps due to the T-Stat and Fan Switch for nearly six months now without a problem. In all I felt like I would not be in danger due to running lower temps and better fuel. So I got the lower boost pulley.

I need to say that the standard pulley is great. It has provided seamless gains in power to the point to where the vehicle moves out with authority. Having put a few miles on it now I can now feel that the power has become obsessive. It is all too easy to move out in front of traffic and dare I say, this is certainly pulling harder than my old Typhoon (barring launching from a stop) and definitely harder than my GTP. Now gearing does play a part but it is certainly satisfying. I pulled ahead from lesser cars today from 40 MPH in 4th at a decent rate and feel.

First off, this is not a change to the SC pulley, it remains the same. This is a change to the double alternator pulley so the install is not as simple as i had hoped for. But to my amazement, I was able to remove the other pulley without removing the SC. This can bee seen in the pics below. It took me about twenty minutes to get the pulley off but I was committed to other duties so I never finished. That is left for tomorrow along with a follow up post.

Here is how I was able to reach the alternator pulley, this shows the pulley removed. It helps to have an impact gun with a 1/2 inch drive extension.



The two below pics are of the pulleys. The one on the left is the new, higher boost pulley. Notice how it is larger. Had the SC pulley been replaced it would have been smaller. It is all about drive ratios...

 

nice write-up


plz keep us posted, i for one look forward to see how much better the upgraded pulley is vs. the one comptech provides w/the s/c kit

 

go steve

 

For you or for me... JK

 

So you need a new belt, right?

 

boost, it's what's for dinner.

 

Nope, the one provided fits just fine.

 

your the man... look whos got the fastest S/C CL..... Steve does..Steve does..

Not for long.. I am on your ass real soon my friend.. real soon...LOL.. looks good Steve, i am actually very happy your part of this board... Thanks for all the very informative posts.

 

great job steve but i heard if you go up in boost it voids the blower warrranty is this true?

 

heheh, let me know when you make the jump, I know you will enjoy it.

 

I was never directly told that by Comptech but that is what I previously heard from the board.

 

Scalbert, What was the psi you ended up with on the stock pulley and how much will the new pulley add? Thanks for all your updates!

 

dyno dyno dyno!

 

hey steve whats the new boost level on the bigger pulley and what about long term reliability with more boost.if it works out for you and dyno looks good maybe ill get one

 

were did you get the pulley from and what is the boost suppost to be?

 

I haven't installed it yet to know what the boost will be but I suspect that it will be about a pound to a pound and a half more. I was runnign about 3.0 - 3.5 with the standard pulley.

I got the pulley from Comptech.

And yes, a dyno will soon follow.

 

Try this just to see how close it ends up. I was told 1 psi for every 1/2" larger diameter. Compare the two pully diameters and see if that's close when it's installed.

 

That doesn't quite work out. It would depend on the initial pulley sizes and percentage change. The pulley is in now and the car has been warmed up; put through several cycles. But I'll have to wait until the morning to test it.

But based on initial calculations there should be about 1.5 PSI more boost. I'll report in the morning about the actual numbers.

 

I just took it for a quick run, the boost was running just shy of 5.5 PSI. To my surprise, there was a noticeable power gain, it was excellent.

1st gear would break loose before when rolling on the throttle, but now it completely spun. Of course the power came on sooner and lasted all the way to redline.

After I get a few more miles on it I'll report back on it. But for now I am very pleased.

 

That sounds better. 6 psi should be a very safe boost level for the blower and the motor. Now all we need is the kit for the automatic.

 

Scalbert, do you plan on getting the Comptech clutch also?

 

Not until the stock one goes on me and then I would probably consider it.

 

heres a dumb question for you buddy,
since u've just increased you boost by almost 2psi (from ~3.5 to ~5.5psi), how much additional hp do u think you picked up at the wheels? Just an educated estimate?

 

And this is just a guess but based on previous blown cars and some quick calculations but maybe about 20 WHP.