Magna Charger Worth Puting On A 408ci
11-15-2008, 07:27 PM
#31
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Finally some numbers
We finally got the time to run the new beast on the dyno. The ultimate question, is the 1900 big enough? Yes and No. I will post the dyno numbers with the 2.8" pulley first. Torque is outstanding. Flat curve, average torque was 653.3 ft/lbs. Peak of 677 at 3900 rpm where the boost was only 5lbs. Just crazy. Horsepower peak was 727 at 6200 rpm but we started to run out of fuel pump. Here is the graph. Max boost was about 6.5lbs from about 5500pm up. Otherwise boost running about 5 lbs. Here is the graph.
11-15-2008, 07:42 PM
#32
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Numbers with 3" pulley
Here is the graph with the 3" pulley. We still were running rich at low rpms so we left some power on the table. The surprising thing was the we could only get 4lbs of boost out of the blower. Still the torque curve is awesome and the numbers were solid. Peak torque was 620 ft/lbs at 3800 rpms with peak hp of 664 at 6200 rpm. Enjoy
11-15-2008, 07:47 PM
#33
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That is just nuts. That is some towing power there...
We finally got the time to run the new beast on the dyno. The ultimate question, is the 1900 big enough? Yes and No. I will post the dyno numbers with the 2.8" pulley first. Torque is outstanding. Flat curve, average torque was 653.3 ft/lbs. Peak of 677 at 3900 rpm where the boost was only 5lbs. Just crazy. Horsepower peak was 727 at 6200 rpm but we started to run out of fuel pump. Here is the graph. Max boost was about 6.5lbs from about 5500pm up. Otherwise boost running about 5 lbs. Here is the graph.
11-15-2008, 11:12 PM
#34
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Nicely done. You pretty much achieved your goal. I like the idea of a 408 with low boost. They make very good power and will still have good drivability. It would be nice to have the option for more boost, but even if you eventually stepped up to the 2300 I'd still keep the boost down to around 6psi or so. It's funny when I hear the diesel guys brag about their torque numbers. I'd like to see one of them make that much torque with only 5psi of boost.
11-16-2008, 01:10 AM
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We were pleasantly surprised that you could not only make that much torque but have it over the whole rpm range. This engine should be driveable, extremely durable and one whole lot of fun. I certainly want to thank the guys at Racing Engine Design. They really know there stuff. They were right on with the cam choice, the compression and the blower. We were shooting for this type of power and power curve and I couldn't be happier. I hope to have it in the truck this week.
Last edited by fish5225; 11-16-2008 at 08:32 PM.
11-16-2008, 08:41 PM
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Nothing secret with the blessing of my engine builder, Racing Engine Design. Cam is a 226/238 at .050, 114 LSA with lift at 601 both intake and exhaust. Like I said earlier, with a good builder, we were right on the money with the first cam. We think there is still some power left, we are waiting on the new MAF.
11-16-2008, 11:20 PM
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Thanks supersub, just like you, waiting on the 2300 to really make it scary. Did you ever dyno your beast? Have you been happy with the Lingenfelter 100mm MAF? We hope to drop it in the truck this week so I need to get the MAF figured out. Also, has that built 4L65 been holding up. I have the tranny man ready to build the 65 or swap to the 4L80. I know the 65 won't last forever, I was just hoping long enough to make the swap to a 6L90 if they ever get that working right.
