Twin Turbo EFI '69 Dart

CUDA69 said
If 15 pounds of boost doubles your HP then you should be over 500. Do you need a roll bar to go under 11.5 seconds like we do over here? This looks like it will be a ten second car with a really high trap speed. Can a 10 bolt rear handle that much power with sticky tires? Wasn't the heavy duty Chevy rear the 12 bolt? This is one of the more interesting builds posted, great work so far.

It will probably do just more than double horsepower, as at 15 psi you're actually getting more than double the amount of air/fuel mixture into the motor than it would naturally aspirated. N/A you're not getting a 100% fill of the cilinders which lowers your volumetric efficiency.

Yes, over here you do need a roll bar under 11.5 seconds as we run with NHRA rules over here. So whatever goes for you, goes for us. I hope the 10 bolt can handle the power. It has cap supports to keep them in place and I have seen 10 bolts run pretty hard with nitrous on other cars with stickies. 12 bolts are the stronger rears, but I already have the one I had under my '69 Camaro. The 10 bolt wqs done before I got hold of a 9" and a Dana 60, so if it does break, I'll swap in one of those. Both rears would need to be shortened, the Dana 60 is a truck full floater and has 4.10's so this requires a fair amount of modification and the 9" would only need (besides shortening) other gears because it's somewehere around 2.76. Best would be to have around 3.23 with the turbo setup.