Sideways

I have not seen a post on SOS like this.

I am considering the upgraded bearings (62,000 rpm) and ran across this video for Vortech owners:
http://www.youtube.com/watch?v=nbx-7ErjZkQ

http://www.starrland.com/Supercharger%20re...s%202-22-08.pdf

Sportster

Sideways, one of the best threads regarding SC.

Since I am using a Novi 1000 mounted on a CT setup, I did searched to find out a compressor map for the Paxton unit but was unable to. What I did find is that on many threads and people who have talked to Paxton mentioned a limit of 55300 RPM
Based on what I found on other posts:

Crank Dia./Blower Dia. x RPM x Blower Ratio (3.54:1) = Impeller Speed

Since Comptech uses a ~5.25" (if anyone knows the exact measurement at the top of the teeth would be great) rather than the 6" that Vortech uses, Then 3" for a 8900RPM rev limit is about the smallest you can go. This of course has to be recalculated for different rev limits.

The problem with Novi 1000 mounted on a CT plate is that because it uses a ~5.25" Crank Dia, you have to use a very small supercharger pulley to bring the unit to its peak which comes along with belt slippage (smaller pulley, less pulley/belt contact surface area). I will definitely try using a reichard pulley to see if it eliminates slippage even in such small pulley sizes but I was wondering if anyone has used a larger crank pulley (like Vortech's 6"), or is it possible to use the crank pulley from Vortech's kit to a CTSC as a solution.

Sideways

If space is available a larger crank pulley would work. Mustangs use larger crank pulleys to up the output on a Vortech. They have space.

Sportster

The problem is that you have to manufacture one based on the CT original pulley, or get one from Vortech's kit and see if it fits with the correct offset, or maybe modify that one...

cack

Has anybody tried V belts? Coming from an industrial background where we transfer thousands of pounds of torque with v belts, I can tell you that flat belts wouldn't come close to working. And with v belts, you could buy different sizes for about twenty bucks. As long as you don't bend them backwards like a serpentine belt, it seems like they would transfer more power with much less belt tension.

joefish1298

You would need to change all the other pulleys that it runs around, complicating the install. I assume this is the same reason a toothed belt isn't used.

[AP2-2NV]

to get away from aftercooler choke points and complications. .

would a front mount intercooler setup be better? i assume there would be a little more pressure loss than a aftercooler setup. but with a good core it would be minimal

Sideways

The Vortech aftercooler is very efficient. By increasing the size of the radiator like the SOS unit you can get better cooling and still maintain your boost. I have yet to see a front mount that didn't loose significant boost.

Sportster

I have converted from the standard CT AC Aftercooler to a FMIC. The pressure loss compared to the CT AC, was 4psi using a 3.6" pulley (standard AC 10psi @9000). If you go to a smaller pulley (I already have a 3.0 and a 3.2 in hand) the pressure loss will be less, 2-3psi max. I have not regretted using a FMIC since the IAT's have dropped significantly and overall the simplicity, effectiveness and maintenance free of the system makes up for the lost boost which anyway can be had with a smaller pulley. I am not going to run more than 10psi anyway so it suits my needs.

I had used a larger Cooler as the SoS kit for my CTSC AC and I did not notice any significant difference. Maybe the Vortech system is more efficient but I doudbt that it is. The best way to go is definitely a water/meth injection if you want max boost, but again if you are not planning to run more than 10psi, FMIC and a smaller pulley to net you the desired boost will give you sustainable results, system simplicity and a maintenance free cooling system.

As for the pulleys, I had a quick look and it seems to me that there is not enough space to put a larger crank pulley without having to offset the supercharger as well. I don’t know if anyone has done it before but to me seems quite intrusive. The simplest way to go is to use the 3.0" reichard pulley. Does anyone has this kind of pulley in 3.0" for CT to let us know how they perform in that dia.?