CC Inserts Dynotest

Test performed by: Dakota Parts
Test Engine: 383 cu. in. 4.03 Bore 3.76 Stroke
Test Parameters: Mid-range Torque and Power

NOTE: All tests performed the same day on same engine, within minutes of each other. Engine tests were performed using 2 and 3 disk inserts in open collector. Comparison is between open headers and open headers with inserts.

Baseline	Open Header		2 Disk		3 Disk
RPM	Torque	H.P.	Torque	H.P.	Torque	H.P.
2700	411.6	209.3	409.5	210.5	414.9	213.3
2800	412.9	220.2	419.3	223.6	417.7	222.7
2900	415.6	229.5	420.7	240.9	419.8	231.8
3000	417.4	238.4	421.8	240.9	420.9	240.4
3100	417.7	238.4	421.6	248.9	418.8	247.2
3200	417.8	254.6	420.7	256.4	417.8	254.6
3300	419.9	263.8	419.3	263.5	421.4	264.8
3400	418.1	270.7	428.2	277.2	425.8	275.7
3500	417.8	278.4	429.3	286.1	426.2	284.0
3600	419.1	287.2	430.7	295.1	428.6	293.8
3700	419.2	295.4	431.5	304.0	430.3	303.2
3800	417.1	301.8	430.7	311.6	428.1	309.8
3900	416.6	309.4	427.9	317.7	425.7	316.1
4000	416.2	317.1	422.6	323.4	422.8	322.0

For street engines running any stock muffler the performance benefits would be slightly greater. The inserts created more H.P. and Torque than was present with open headers demonstrating the effectiveness of CC Inserts design. This is the effective RPM range of most street engines and where torque is the most important figure. When compared to more radical engines making H.P. at higher RPM's the inserts/mufflers might be less effective at the higher RPM's but the broader torque curve would provide better total acceleration in cars with similar gearing.

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