General Category > Quadrajet Carb Talk and Tips
Rod difference between automatic and manual transmissions.
MRSOFTE:
Copy that! ;D
Thx Ethan
Ethan1:
--- Quote from: MRSOFTE on November 02, 2016, 12:35:49 PM ---Gotcha. But what exactly is going on in the engine for the factory to specify different rods sizes between carbs due to whether its automatic or manual behind the engine?
--- End quote ---
Didn't receive an e-mail, but I called him.
Basically what I/Mudsport have been saying, the M/T takes lesser amount of power, whereas the automatic transmission does. Converter slippage, clutch slippage, fluid transfer, rear differential, all have a roll in this. Jon told me 15%-25% power loss for the M/T and 35%-75% power loss for the A/T! Crazy! :o
DeCaff2007:
Wow, funny I was just going to ask this exact same question. I have a 76 Trans Am with a 74 400/96 heads, th350.... but I have a factory correct QJ. Pretty standard configuration, but I've found a good deal on a 79 ST-10 4 speed (which was mated to a 78 400). I'm SERIOUSLY considering doing the 4 speed conversion.
Now that I know it's just a matter of a different jetting kit, I may just go ahead and pull the trigger on this.
Ethan1:
--- Quote from: DeCaff2007 on November 23, 2016, 06:48:36 AM ---Wow, funny I was just going to ask this exact same question. I have a 76 Trans Am with a 74 400/96 heads, th350.... but I have a factory correct QJ. Pretty standard configuration, but I've found a good deal on a 79 ST-10 4 speed (which was mated to a 78 400). I'm SERIOUSLY considering doing the 4 speed conversion.
Now that I know it's just a matter of a different jetting kit, I may just go ahead and pull the trigger on this.
--- End quote ---
It is more than just needing a jetting kit. You have to open up some passage ways, too. Restrictors, idle tubes, etc.
MRSOFTE:
Thx for making that call Ethan.
Knowledge is power!!!!! Especially here...ha!
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