30-50 WHP (to the wheels) for $3,600 isn't to bad if it improves the bottom end, which from the Pettit response, it appears to be. Since realistic launch in our car without a tranny dump (and subsequent tranny and clutch damage) is about 15sec (like Pettit said) and there kit gets that down to 14.1 for a good street launch, thats a hell of a difference. That would imply a sub 14 sec quarter mile time if your willing to risk the tranny.

 

Quote from the response on their site........

"Since the test was performed about six weeks ago, we have made many changes and improvements to the kit allowing for even better drivability and more power. Our base non intercooled kit, which is being tested on some customer cars right now, uses about 6 psi of boost and makes over 200 hp to the wheels. The kit will retail for about $3600.00 – not $5000.00 as claimed in the article. There will be a high boost, air-to-air intercooled version available soon, but no test results or prices have been release yet."

I'm waiting to see what the final dyno numbers are and the final price. Hopefully soon.

 

shelleys_man_06 cares not for dyno results. I care about track results.

 

It confirms that even with quality parts, a lack of tuning or r&d will show less than stellar achievements. Tuning is the most valuable aspect when addressing performance and hp gains....Back to my fd days, we would have a dyno meet and there would be several people with same mods, yet it seemed each one produced different amounts......Gotta love the guy that lays down 400+hp with a 12:1 a/f ratio.. that is a sure sign of a 3month motor, I have always spent almost as much money getting proper tuning once parts are installed. Discover card and their cash backs put to good use.

 

I'll be at Pettit's shop tomorrow to drive and report on the car ...

 

Finally we will have a straight forward response.. Thankx man... lucky $#@%@

 

You should come up to Tampa, We'll go out for some beers. :D

 

$3,600 for 20hp

WHAT A RIP OFF

They need more research.

 

Yeah.. I am with you... more than 200 means less than 205.... and definitely not more than 210... That comes out to 145$ per hp.. yikes.

 

Has this happened yet? Inquiring minds want to know :p

 

""Since the test was performed about six weeks ago, we have made many changes and improvements to the kit allowing for even better drivability and more power. Our base non intercooled kit, which is being tested on some customer cars right now, uses about 6 psi of boost and makes over 200 hp to the wheels. The kit will retail for about $3600.00 – not $5000.00 as claimed in the article. There will be a high boost, air-to-air intercooled version available soon, but no test results or prices have been release yet."

I have the article in front of me. They said the low boost kit is $3800, and the high boost (8 psi) kit is $5000. 40 whp for the low boost, and 60 whp for the high boost and I would be a happy man (and probably a bit too optimistic).

 

Where did you get 60whp from the high boost kit? Everywhere I read it's 50whp even on their site..

 

Just trying to be (a bit too) optimistic Dave. I would just be happier if they could get a little more hp out of these kits. $5000 for 50 whp is a little tough to swallow, 60 whp is a little better. $100 a hp is MBZ, BMW, Porsche territory.

 

The important thing to remember about the hp a twin screw makes is it is through the entire rev range and not just peak. Though 50whp does not sound like a lot, when you move the entire power band up a notch on a car like this, it really is.

 

Yeah, I know the difference between a twin screw SC & a centrifugal unit (like the ATI unit on the Sunflower Mazda car). I still wouldn't mind having 60 whp from a twin screw type, especially at 8 psi. 50 whp, even if it is thru the rev range is a tough nut to swallow at $5K (before installation). I guess 50 whp from a twin screw would be better than a 70 whp (just throwing a number out there) from a HKS Rotrex, Vortech, or Paxton centrifugal type.

 

Yeah. A twin screw is never going to make as much peak, but surely after you get the supercharger there will be other ways to find additonal power down the road. Porting, pullies, headers? My major concern is at the bottom where he mentions carb legal potential. I have heard it from too many people before, but it would be nice and would definitely sway my decision.

 

Bump...

 

Hey! Keep in mind...

PEAK. They are claiming what most people want to hear... PEAK.


here's an example of what HP gains MEAN.


I used to have a Turbocharged 93 Probe GT.

My car dyno'd at 242whp/256ft-lbs. Not bad. I decided to invest in a test pipe (replaces the Cat). Seat of the pants difference was HUGE! I'd guessed 15-20hp gain!

I took it back to the dyno. SAME Peak numbers. WTF? I thought! Geesh...

Then I compared the plots. Sice I had greatly reduced backpressure, the turbo started building boost faster. In fact, between 2000-3500 My car had gained anywhere from 10-25hp and equal amounts of torque. So - yeah...That test pipe allowed for a 25hp gain (in some points of the curve.)

If Pettit SC can provide a 40hp PEAK gean, AND give an RX8 that much down low, that's a HUGE deal. Imaging having 40lbs-ft of torque INCREASE from 3000-6000? You want burn outs? there ya go.

:D

Frankly, I'd trade 40ft-lbs over a broad RPM Range (say, 40lbs-ft increase from 3000 to redline) than 75ft-lbs peak (e.g. same power until 5500, then a shoot up 75lbs-ft tween 5500-6000)