Racecar a`la Rx-8.
04-24-2007, 12:28 PM
#1
Registered
Thread Starter
Join Date: Mar 2004
Location: Ekerö, Sweden
Posts: 60
Likes: 0
Received 0 Likes
on
0 Posts
Racecar a`la Rx-8.
Here is my result on Dynapack dynamometer. I live in Sweden and bought DNA Supercharger last summer, built it in this Winter and are on a testday this friday.
I have ReAmemiya spark plugg wires and header and Turbo X exhaustsystem for race. Engine is stock and in good condition. All results on the rear axle. Pressure in PSI.
We are 2 guys driving Rx-8 with DNA Supersharger and both of us are happy with the results.
Starting- point engine - power. 148 HP and 148.3 Nm.
I have ReAmemiya spark plugg wires and header and Turbo X exhaustsystem for race. Engine is stock and in good condition. All results on the rear axle. Pressure in PSI.
We are 2 guys driving Rx-8 with DNA Supersharger and both of us are happy with the results.
Starting- point engine - power. 148 HP and 148.3 Nm.
Last edited by Lennart; 04-25-2007 at 02:23 PM.
04-24-2007, 12:40 PM
#3
Very Nice!
Question: In the second pic, is that the manifold pressure in PSI Gauge? It says absolute, but the numbers look like gauge pressure relative to ambient, that would put you at 10 psi peak without really topping out your boost any. Is the lamba value the O2 sensor voltage? It looks tuned well. Give us pics of the engine bay!!
Question: In the second pic, is that the manifold pressure in PSI Gauge? It says absolute, but the numbers look like gauge pressure relative to ambient, that would put you at 10 psi peak without really topping out your boost any. Is the lamba value the O2 sensor voltage? It looks tuned well. Give us pics of the engine bay!!
04-24-2007, 04:04 PM
#14
put my stock dyno (whp on dyno dynamics dyno) in for a comparison .
Not sure if the two dynos are similar but if so it shows a noticeable drop in power early in the rev range . Do you feel this in reality Lennart ?
Not sure if the two dynos are similar but if so it shows a noticeable drop in power early in the rev range . Do you feel this in reality Lennart ?
Last edited by Brettus; 04-28-2013 at 04:09 PM.
04-24-2007, 05:14 PM
#16
Registered
You will always lose low end power with a centrifugal supercharger. They don't make any boost down there and if you ever get a chance to spin one over by hand sometime you'll quickly realize that an a/c compressor is easy to spin by comparison.
04-24-2007, 05:59 PM
#18
Originally Posted by rotarygod
You will always lose low end power with a centrifugal supercharger. They don't make any boost down there and if you ever get a chance to spin one over by hand sometime you'll quickly realize that an a/c compressor is easy to spin by comparison.
04-24-2007, 06:30 PM
#19
Registered
It's hard to tell. Looking at the horsepower number overlayed with the stock RX-8 dyno, you can see that the stock engine makes more power up until 4500 rpm until the supercharger finally starts to take off.
04-24-2007, 06:48 PM
#21
Registered
Most of your daily driving is under 4500 rpm. You'll lose gas mileage like crazy. I've never been a fan of centrifugal superchargers so admittedly I am biased against them. The dynos show why though. Performance is not about peak horsepower. Average horsepower is faster and centrifugals don't have nearly as much average horsepower as the peak would imply. I'd personally rather sacrifice 30 peak horsepower to get a wider and stronger average powerband. I guarantee it would be faster.
04-24-2007, 07:30 PM
#22
Registered User
Join Date: Apr 2005
Posts: 214
Likes: 0
Received 0 Likes
on
0 Posts
Lennart, thanks for sharing .. Very interesting... I wonder what the potential of this unit is.
pulls all the way to redline... interesting... Thanks again, any photos or videos would be very much appreciated...
pulls all the way to redline... interesting... Thanks again, any photos or videos would be very much appreciated...
04-25-2007, 05:09 AM
#23
Registered
Thread Starter
Join Date: Mar 2004
Location: Ekerö, Sweden
Posts: 60
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by maxxdamigz
Very Nice!
Question: In the second pic, is that the manifold pressure in PSI Gauge? It says absolute, but the numbers look like gauge pressure relative to ambient, that would put you at 10 psi peak without really topping out your boost any. Is the lamba value the O2 sensor voltage? It looks tuned well. Give us pics of the engine bay!!
Question: In the second pic, is that the manifold pressure in PSI Gauge? It says absolute, but the numbers look like gauge pressure relative to ambient, that would put you at 10 psi peak without really topping out your boost any. Is the lamba value the O2 sensor voltage? It looks tuned well. Give us pics of the engine bay!!