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04-21-2018, 03:35 PM
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Registered User
  
Join Date: Jan 2011
Location: Chattanooga TN
Posts: 6,214
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Big Block - possible timing issue (?)
I have a 68 with a fairly hot BBC. It's a 396, .0060 over. 427 Eagle crank, 290 heads, headers, Magnaflows with X pipe, RPM intake, KB hyper pistons, billet timing gears, Voodoo 60204 cam, roller tip rockers. TH400, 3.73. 3200 stall. HEI dist. Vac advance connected. , 8.2 wires. ACDelco Rapid Fire platinum #4.. It's currently sitting at 13 deg BTDC.
When you start the truck. Cold start it wants to crack and pop through the exhaust. Until you get up to speed (20-30mph) it will smooth out but just in that lower RPM range, off a dead stop it is just an occasional pop through the exhaust. Your thoughts? I am thinking either timing or advance issue. All input welcome. Help me out.. Thanks
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Chad 1967 C10 SWB - Project Savannah - 6.0/4L80 *Currently underway* 1968 C10 SWB - TOTY 2018, 50th Anniversary Tribute Project * Sold * Pride and Joy 1986 Silverado Short Fleet - Scarlet *Sold* 1985 Silverado Short Fleet *Sold* 2022 Jeep Gladiator Mojave 2001 Jeep Cherokee XJ 4x4 - Lifted, Built 1992 Jeep Cherokee XJ 4x4 - Lifted 2013 Honda Accord EX-L v6 Coupe 6spd (wife's ride) |
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