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Driver174 |
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#1
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Member ![]() ![]() Group: Members Posts: 106 Joined: 2-February 17 From: Nevada Member No.: 20,806 Region Association: None ![]() ![]() |
914-4 2L race engine, 10.3:1 compression ratio and twin Weber's
Anyone have experience with the MSD systems on a Type IV? I'm thinking there may be benifits to having the higher spark voltages when compression ratio is relatively high. MSD claims plug gaps of .050 - .060" are possible, and that multiple sparks at lower RPM's improve throttle response. Thus, makes sense, but does anyone have real world experience that support these claims? |
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HAM Inc |
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#2
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Senior Member ![]() ![]() ![]() Group: Members Posts: 846 Joined: 24-July 06 From: Watkinsville,GA Member No.: 6,499 Region Association: None ![]() |
We all know the hemi chamber with dome pistons is a bitch for flame propagation, no doubt about that. I can definitely see the CDI helping in that design.
Our shift point was around 7800, but at Roebling Road I did stretch 3rd to 8100 or so. One of the things that puzzles me about the multiple spark discharge concept when using a distributor is, how broad a crank angle can the rotor distribute spark in a given firing cycle. Without a special rotor, I don't think it could be as many as 20 crank degrees, which IRRC is what MSD advertised. |
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