About $700 Lol. The holding power is much higher. This is a cool build. What type of transmission is this being bolted to?
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Your right about the cost lol, it sure wasn't cheap but I needed the extra clamping force with this much power. It's the 6L80e that came with the truck but I built it up a bit. I'm still worried about locked WOT shifts breaking the input shaft at this power level because I didn't use a 300m input. I might regret it or just not lock up on shifts since this is my daily driven street truck.
Am I understanding right that your current engine is a 6.2 and your putting in a Gen III 6.0 in your 2007 Denali with 823 heads? What do you figure a 402 will make with natural induction? Pretty cool build btw!
Yes, your correct. Might seem stupid to pull the Aluminum block and replace it with an old iron block but the 6.2L Aluminum blocks can get bore distortion pretty easy, even in stock configuration like mine was after 150k miles. I didn't want to deal with excessive oil consumption because that's why I pulled the motor to start. Also you can only go .010-.030 over on the Aluminum which doesn't leave room for repair should something happen. I can go to 416" on the LQ9 if needed. The iron block also allows me to keep the bore size down to 4.005" vs 4.070" (better for knock retard) and add the 4" stroke to bring the cubes up. I am using my L92 heads on the Gen III which a lot of people already do. As far as power goes for N/A, general rule of thumb is at least 1hp per cube across the RPM range. So figure an N/A 6.2L vs a 402" stroker will get you 24hp at least, even more in a blower application but then you have a huge motor and no blower capacity. This is where Cam selection becomes very important and it's why I went with the BTR Stage 3 cam with 120 degrees of LSA. You'll get excessive back pressure if you have incorrect overlap.
I should be making 750-800hp at the crank with my 2.5" upper and 5% overdrive damper @ around 14psi...
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