Next time I'm at his house (should be this week) I'll steel a few for you guys.
$50 per set sounds about right.

 

crook..............Murph promised me a set for a price he and I already agreed to...........about $50 bucks less than your "kind offer"...............

 

Yea, well I'm risking being offered many adult beverages going in for these stickers. So I deserve the hazard pay. I may even be forced to see Rachel in a low cut, thin top again – you guys owe me big time for this mission

 

I got yer compensation for ya......right here......jes step a little closer.......jest a liiiiiiitle cloooooser.....

 

Gretch and Kevin, some decals coming your way.

Gretch, did you ever get the tensoiner spring upgrade?

 

And a huge thank you, Tim.

 

Zoltan, I agree, big pain . I think I will go with the Murph IC. eventually. Although boring a 3" hole through a block of dry ice would keep me outta trouble with Laura.

 

Damn it - another business plan foiled.

 

Kevin,
Honestly just wait till next spring when it starts warming up next year and save up the money or whatever till then! Enjoy the simplicity and fun for now!

 

I think this performance question is an interesting one...with the Vortech you have a very fast boost rise in 1st gear because of the gear ratio...by this I mean boost vs time. Additionally, the Vortech allows the 928 to keep the longer intake runners which helps develop torque midrange. But remember, the boost level is way down compared to a twin screw across the mid range of the power band.

The reason I ask about 1/4 mile is because as you shift up and loads increase you have slower boost rise (again vs time) because the rate of change in speed of the crankshaft is now slower than it was in 1st gear.

If we look at this compared to a screw compressor...you have immediate boost in all gears once the butterfly is opened. But, you have lost the long runner by removing the intake....food for thought. You also have more power to drive the compressor.

I'd like to see a head to head comparison...performance figures for an equally boosted CS and twin screw car. I can see where 0-60 there would not be a huge difference, but as loads increase the advantage of mid range full boost has to play out somehow. I'd expect more peak HP with the Vortech, but more area under the curve with the screw type.

Also, what about transient response in leaving a corner at a mid range RPM value and opening the butterfly...the twin screw gives you full boost now (which should mean more torque and more power now).

My $0.02 for the day. Any takers on the head to head comparison...how about the following:

0-60 MPH
Rolling 5 MPH-100 MPH
1/4 mile time and speed
50-130 MPH

 

Well, I can speak for the GB crew we have been talking about doing a 1/4 mile night - this will include the 6 liter red car.

Next weekend Murf and I will be in Hell with Andrew Olsen - who knows Two Vortech 928's and one twin screw......Andrew, is there a 1/4 mile track anywhere near this place?

Keep in mind, with my 81 when I shift at 6,000 into 2nd, I'm pretty darn close to my peak torque @ 3,915rpm - so not really much of a drop. Sure the positive displacement blower may be higher (hard to say, have not seen a US 16V with one yet) I'm already burning the tires when I shift into 2nd. On a drag strip I expect more traction so that could also make a difference.

 

the g-tech can do 1/4. Tim has one and you wouldn't have to set much up but a straight road, and then anyone can join in thats already in Hell! also, wont cost anyone more money and wont have to set up antoher gathering. This wont be as accurate as the drag strip, but with everyone using the same g-tech in the same conditions the comparisons will be accurate

 

John Kuhn, I plan on doing just that after my dyno. I will tell you the centrifugal is better in most respects - my opinion only. It is just a different horse to break. You have to drive it as you would the Honda-s2000, keep it up high in the revs shift precisely and quickly-and most importantly ,when you are supposed to. Coming out of a corner given the same speed and corner,manual vs.manual, I would say the TS would be roasting tires at full throttle about the same time I would be coming on boost, and then in my opinion I would gain the advantage. Same off of the line in a race or 1/4. Much like a turbo in the same comparison. I would not want all my boost instantaniously. It is a matter of control for me. I am almost convinced if I launched at 3000-3500 I could get a 0-60 in the the high 3's but I don't want to hurt the ol' girl. Anyway, I am a fan of your twin turbo s4 project!
Kevin

 

That's why the throttle pedal can be not only pressed, but depressed... ie it's adjustable ie the TS wouldn't need to be using full throttle.

 

It's as instantanious as your foot makes it...