another boosted slant : D opinons plz
it wont spin past 5000 rpm itll be a daily driver not a racer. im shooting to put about 800 bucks into it. my goal is probably around 250-300 horse. my main concern is whether my 9.5 compression goal with 5-12 pounds of boost will be safe with out detonation problems. ill be running an intercooler so thatll help alot but idk if itll be enough
I believe that's really too much compression for a turbo motor. How did it get that high?
Eight to one, or maybe, nine to one MAX, would be better.
Is your block or head milled? We need to know....
If it's the head, maybe you could trade it for one that's not...
Have you already bought an intercooler? If you haven't, use that money to buy a chemical intercooler (alcohol injector.) That would work better in your case, I think.
Ten pounds of boost is going to be safe for your motor IF you dial the timing (total advance) back to 18 degrees and don't let it ever exceed that, especially, under boost. You'll be sweeping up the broken pieces...
Ten pounds of boost probably doesn't sound like a lot, but I put a Vortech belt-driven, centrifugal supercharger on my 360 Magnum, and it went from 260 rear wheel horsepower to 445. Yeah; just 10 pounds of boost.
How much does your car weigh? That is an important part of this equation. Most early-seventies Darts weight about 3,350, I think.
Dunno what your car is...
I think a 2bbl manifold (junkyard part) and a Holley 350 2bl would work well for you, and you can use the stock cam and valvetrain, and modify the stock exhaust manifold to mount the turbo, and save the cost of headers.
You can run a vacuum line from the carb hat to the top of the fuel pump and boost reference it (the pump), that way. If you limit your boost to 10 pounds, the stock fuel system should do fine...
You may not make 300 horsepower with this setup, but I'm guessing you'll be close.
You'll need some colder plugs, and to make sure your ignition system is in good workung order.
A stronger rear axle assembly would be a smart move, because the 7.25" rear end that most of the /6 cars came with won't live very long, with the torque of a turbo motor. You do NOT need an expensive 8.75" A-body with the drop-out center section, though.
I'll explain why in my next note.
