Sorry that should read 270 KPH not 279

 

This is one I found with a quick serach. He gained just about 100 whp with Comptech at 6 psi. I'm sure there is more.
https://www.s2ki.com/forums/index.ph...pic=234514&hl=

 

OK lets take a look at these figures:

Base line = 205 RWHP (on the high side but probaly due to the dyno calibration)
After SC = 294 RWHP (not the >300 you are saying)

Difference = 89 RWHP

% difference = 89 / 205 * 100 = 43.4 %

Pretty much what I got with my Vortech, and I noticed that car has the Comptech after cooler fitted, which is not standard from Comptech.

These are the increase in power figures people should expect from this upgrade, to lead them to believe they will get more is not in my mind doing them any favors.

 

Back to my original point, Vortechs kit comes with an aftercooloer and runs at 7 or 8 psi. Shouldn't that be enough to reach 300 whp? I understand that not everycar with a s/c setup has reached 300, but for some reason, some of them have. Im sure its not because of the dyno used. What do you think my car will dyno at if I took my s/c off?

 

Don't be too quick to come to this conclusion. When I was at the Comptech factory, the tech there had some very interesting things to say about dynos. He said not to put too much belief in any given dyno number as they can vary from one dyno to another and from one dyno operator to another. The only thing you can use with any kind of faith and relevence is a "before" and "after" dyno done on the same dyno by the same operator in more or less the same ambient conditions. Each dyno can be different and can be affected by atmospheric and climatic conditions at the time. Each dyno operator can input different factors for compensation and the operator can interpret each of these factors differently. A natural statistical error of even 5% for a car running in the 200 whp range on any given dyno can mean a difference of 10whp from one run to another. Throw in operator variation and a different machine and this can change dramatically.

 

I agree that there is a percentage of error in dynoing, but do you agree that the only reason anyone has hit 300whp is because of that error?

 

As my information came second hand, I wouldn't want to say either way. Certainly, the possibility exists.

 

We're not leading them to believe anything that isn't backed up by a dyno graph (regardless of how unreliable you think it is). YOU, however, are MIS-leading people into thinking they cannot achieve 300 whp from a stock SC kit.

To quote you verbatim:

Wrong on both counts.

With that said, NO, not everyone will get 300+ whp out of the box. But some WILL (and already have).

 

I still have not seen a before and after Dyno done in the same conditions that shows more than a 45% increase.

 

I don't have before and after Dyno sheets, but here are two totally different cars dynoed back to back and both are bolt on Vortech kits from Evolution without any significant tuning (I use the word "significant" because even during install there is a little tuning done and I'm sure there was a little tinkering too - but nothing major with an EMS).

dave22



evf2000


dave22's car is a little older than evf2000's and there is evidence to believe the previous owner of his car had it turbocharged.

As for what I've seen happen with these cars:

evf2000 has had his charger for about a year and half now. He blew a tie rod while drag racing. He has gears and hasn't had any diff issues yet. He is in need of a clutch (he may have already replaced it), and he now has an EMS which he is hoping will carry him over that 350 rwhp mark.

dave22 bought his Super Charger used about a year ago and has had numerous issues. Since we think his car was one of the original Turbo'd S2000's we know that there was an upgraded clutch installed - however that clutch is on its way out as I type (about 60K miles). Dave blew his stock diff, but has since had the new one cryotreated and hasn't had any problems at all. Dave continues to blow belts, and so did the previous owner - the pulley seems to break/chip after every other time the belt goes. He finally got a stronger pulley on there, and things have been running well since (about a month - which is a long time for Dave not to have a problem ).

These are the only two Super Chargers I see more than just a few times a year (that will change soon) and after watching Dave, I have been hesitant to even consider throwing a charger on mine - but with the new ones coming into my area I'm hoping they will have better luck.......convincing me to upgrade