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Originally Posted by cobra crazee
on the engine dyno car made 660 hp and 678tq, after the 1k mile break in
had the car on chassis dyno with my spiral turbo side pipe modification. I also had the end cork cut for extra hp. The car put down 632hp and 619tq
Isn't that lot of power loss? I thought the spiral turbo side pipes were gonna free up lot of power? Should I change the pipes again?
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As a dyno owner and tuner, I would almost have to question your numbers, as being exceptionally too close together. Most Cobras I've dynoed that have made 650 on an engine dyno, put about 450-500 on a chassis dyno. A VERY good sidepipe setup will free up a ton of power that Cobras eat up, but you've still got parasitic drivetrain loss. That in itself should be a good 12-15% if you've got a stick with IRS.
Something doesn't seem right.
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Sal Mennella
CSX 4241, KMP 357 - sold and missed, CSX 4819 - cancelled, FFR 5132 - sold
See my car at CSXinfo.net here >> CSX 4241