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Old Jun 21, 2009 | 08:20 AM
  #1  
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I'm considering buying a pair of Brodix IK180. They sell 2 versions. Can someone help me understand the difference and let me know which one you would recommend for a L82 4 sp, true dual exhaust, performer intake. Everything else is stock.

http://www.summitracing.com/parts/BRO-1021004/

http://www.summitracing.com/parts/BRO-1021005/
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Old Jun 21, 2009 | 09:04 AM
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From: CORVETTE 77 385 C.I. TEXAS
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Valve springs are different.
The Brodix are avail. in 64cc or 70cc. Stock L-82 is 76cc, so order the 70cc which will increase C/R.

Last edited by Ganey; Jun 21, 2009 at 09:10 AM.
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Old Jun 21, 2009 | 02:25 PM
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The 1021005 has .575 lift vs .524
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Old Jun 21, 2009 | 03:37 PM
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If you are planning to keep the L82 cam, the first part number would be appropriate.
The spring specs per Brodix are-
1.250 Hydraulic Valve Spring - CC 981,
100 lb Closed, 300 lb Open,
1.850 Installed Height,
.525 Maximum Lift
or
1.470 Hydraulic Roller Valve Spring - CC 987,
125 lb Closed, 325 lb Open,
1.900 Installed Height,
.575 Maximum Lift
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Old Jun 22, 2009 | 12:18 AM
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I would go with the 64 CC heads. The L82 cam will have no problem with the extra compression.
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