Dyno results - supercharged 525EFI
02-09-2006, 09:25 PM
#1
Dyno results - supercharged 525EFI
I just got the results from Arizona Speed & Marine. We installed an Rtech system on a customer's 525EFI and sent it out to Jim for programming. Engine was freshened and Cometic gaskets were installed.
This is the same blower and intercooler that we use for the HP500EFI. We used the same pulley on the blower, but the better heads, cam and headers made a noticeable difference, 873 HP @ 5600 RPM. You can tell by looking at the curves that 900 HP is waiting for us at 6000 RPM, but we didn't want to run the stock valvetrain that high.
I plotted these results on the attached graph along with the HP500EFI dyno results from Mark at Precision Marine last summer.
This engine is being installed in a single engine cat. You can see a sister engine in Doller Offshore's booth in Miami.
This is the same blower and intercooler that we use for the HP500EFI. We used the same pulley on the blower, but the better heads, cam and headers made a noticeable difference, 873 HP @ 5600 RPM. You can tell by looking at the curves that 900 HP is waiting for us at 6000 RPM, but we didn't want to run the stock valvetrain that high.
I plotted these results on the attached graph along with the HP500EFI dyno results from Mark at Precision Marine last summer.
This engine is being installed in a single engine cat. You can see a sister engine in Doller Offshore's booth in Miami.
Platinum Member
02-09-2006, 10:25 PM
#4
Re: Dyno results - supercharged 525EFI
The stock closed cooling heat exchanger is replaced with a remotely mounted heat exchanger of much larger capacity (available from Victory Marine). Obviously we need to do this to mount the blower but there are other benefits. IMHO the stock system is ugly and would never keep up to the new HP levels under sustained load.
02-10-2006, 05:07 PM
#7
Re: Dyno results - supercharged 525EFI
Originally Posted by tomcat
The stock closed cooling heat exchanger is replaced with a remotely mounted heat exchanger of much larger capacity (available from Victory Marine). Obviously we need to do this to mount the blower but there are other benefits. IMHO the stock system is ugly and would never keep up to the new HP levels under sustained load.
02-13-2006, 02:58 PM
#10
Re: Dyno results - supercharged 525EFI
Marty: 7 psi and MEFI4b
Cam-shaft: The blower inlet is mostly inside the headers, over the valve cover. A K&N filter will fit with a bit of an elbow/reducer.
paradigm shift: The old tank won't fit anything but the Merc heads with the water outlets on the front of the heads.
375stinger: Subliminal advertising.
Back4More: Victory Marine freshened this engine and used better rings, bearings and Cometic head gaskets. Heads and cam are stock.
Cam-shaft: The blower inlet is mostly inside the headers, over the valve cover. A K&N filter will fit with a bit of an elbow/reducer.
paradigm shift: The old tank won't fit anything but the Merc heads with the water outlets on the front of the heads.
375stinger: Subliminal advertising.
Back4More: Victory Marine freshened this engine and used better rings, bearings and Cometic head gaskets. Heads and cam are stock.
Last edited by tomcat; 02-13-2006 at 03:23 PM.
