Thread: 427 or Twin-turbo 283 power?

Tweet

Some things you need to consider about your twin - turbo plan....

If you want to make any real power out of it, and you want to be able to tune it effeciently, you'll need a fuel injection system.... So you have to factor that into the cost.

Ive seen turbo's on carb'ed engines, and it just doesnt make the power it should - as well, its hard to tune unless you install a stand-alone wideband O2 sensor, and even then, you still will never have the precision of being able to select a specific A/F ratio at a given RPM.

And what about an intercooler? More $$$ and more headaches trying to clear the piping from the hair-dryers, to the IC, and back into the intake manifold.... BOV's, wastegates....really, I can make a huge list that'll make your wallet cry, and you can't go cheap with turbos and expect it to last

Anyways, Id stick with a 454, not the 427. Ive had experience with both, and you will have more fun with the 454... And even a mild one will make more than enough power to shred that M20 to peices in a matter of weeks, so be careful.


Oval ports are great for the street; Square port heads will cause a noticable loss of low RPM power in engines that don't have enough cam/compression/rpm to support them.

To quote an excellent engine builder "Horsepower sells, but Torque wins races", so concentrate on building a good torquey engine that you can have fun with - don't fall for the "bigger is better" trap when it comes to cams/heads/carb/compression, as it doesn't apply to STREET cars.

Good Luck.