205 rwhp, which is on the high side for a bone stock S, would have to recieve a 54% increase in power to reach 315 rwhp. I personally know two peeps that have done this not including bigpurp and he has done it as well. If a stock S baselined at say, 195-200 rwhp, it would have to see an increase of in between 58-62% to reach 315 rwhp. If a stock S baselined at say 200 rwhp, it would have to see a gain of 50% to reach just 300 rwhp.

There goes the 45% theory.

 

I'd like to see the before and after dyno's of a car that gets more than a 45% increase from the stock Vortech SC without any tuning or additional mods.
These dyno's need to be on the same machine with more or less the same conditions.
Even Vortech don't claim this much increase! They say you can expect an increase of +/- 100 HP at the crank, given we have +/-240 HP at the crank stock this represents a 42% increase.
In my opinion if the stock SC could give a 50%+ increase Vortech would be shouting about it!

 

Sorry I was a little bit wrong, the actual figure is 108 HP, here is the actual statement from thier web page:

"The Vortech High Output Supercharging System will add 108 horsepower @ 7-8 psig to the S-2000"

This equates to an increase of 108/240 * 100 = 45%

 

They under rated their supercharger.

 

I dont have a Vortech, but my Comptech is running at 7 psi and I am a little over 300. Whats to say a Vortech running at 7 or even 8 cannot reach that number?

 

In the race for more power between Vortech and Comptech I find it highly unlikely that Vortech would under rate theier product.

If you think about it the power increase is more or less directly proportional to the increase in pressure (at these low pressure increases) at the inlet manifold (assuming no other changes are made).

7 PSI = 0.48 Bar, if you accept some losses this comes out at about a 45% increase in pressure, does this figure remind anyone of anything.

If you guys want to believe you have these big numbers that's fine by me.

 

Ok, so you are not actually debating about superchargers, but more towards that all our dyno numbers are wrong.

 

I just wanted to know if there is anything else I should add along with the comptech s/c. I talked to comptech yesterday and they were very helpful. They also said no engine management would be needed whatsoever.

 

A new clutch.

 

Back to subject:

If you go with the stock install as I did, you do not need any additional equipment.

You may find your clutch will need replacing after a while depending on t's age and how you use the car. Mine started to slip after about 3,000 K's with the SC but it had already done 45,000k's before the SC was fitted.

I would aviod using the extra power for sustained high speed driving and limit to short bursts of excelaration. I blew my engine on a return trip from Italy whilst doing 279KPH.

If you try to attempt a lot of drag starts (clutch dumps) you might blow the differential, so if this is your intention you should think about upgrading it.

If you go for more power >325 RWHP you should think about strengthening the whole drive train.

revhi, show me a before and after Dyno (on same dyno, with same conditions) that goes from 190 > 200 RWHP to over 300 with just the SC and I'll be convinced!