hey guys, i know I'm not any where near ready for this but I'm very curious. i was watching youtube videos of turbo slant 6 engines… I'm wondering if someone makes a kit to turbo a slant 6 and what would need to be done to the motor. these slant 6 engine can be gnarly. makes me want to build mine once the rest of the works done!
like these
Slant 6 start up 2 turbo - YouTube
Turbo Dart 225 Tuned Slant - YouTube
Turbo slant sixes are a too well-kept secret.
They are not cheap, nor are they easy-to-build, but they make an end run around the poorly-designed cylinder heads that are on nearly all U.S. manufactured slant sixes.
The unusually robust infrastructure of the slant six (cast iron version,) provides a platform for forced induction that has a lot going for it. The crank is a short, stout, forged steel piece that has main bearings the same size as the mains in a 426 Hemi. Because the engine was initially also produced in aluminum, it has no thinwall castings, and in fact, has main bearing webs and other structural parts that are almost like a diesel engine, in their design.
In short... forced induction and the basic slant six are a marriage mede in heaven.
There are two well-performing examples of turbo slants, whose builders/owners who are FABO members, and they each make over 500 horsepower. They are very similar, in that, both use a 650cfm, Holley 4bbl carb, a flat tappet cam, and both have a 5,500 rpm redline.
One of these engines is in a 2,800-pound '66 Valiant with a 727 T-Flite, and runs the quarter-mile in 10.74 seconds (no typo) at 127mph. The other is in a 1970 Dart (somewhat heavier,) and turns 11-flat at 120+ mph.
Here are videos of those two cars:
[ame="https://www.youtube.com/watch?v=7QzUfV8iTpQ"]Turbo Slant Six 10.74 @ 127 mph 7-19-10 - YouTube[/ame]
[ame="https://www.youtube.com/watch?v=EAxRmoDgsdY"]Turbo charged Slant 6 11.02 @ 120.56 - YouTube[/ame]
But, not everyone wants a 500-horsepower motor, and it is possible to build a 275 horepower turbo slant for a lot less money.
The high-horsepower motors require a lot of expensive (forged) parts, like pistons and rods, O-Rings in the block, and custom exhaust headers, that make them a lot more expensive than their lower-output brothers. You can build a 275 horsepower turbocharged slant six using stock pistons and rods, and even a stock cam and valvetrain. You wouldn''t need an intercooler (necessary on the high horsepower motors,) and a 2bbl Super Six intake-manifold with a Holley 350cfm carb would work well.
This would be a pump gas motor.
But, you would surely need a wastegate so you could limit the boost to no more than 12 pounds, and keep a close eye on your total spark advance, so as to prevent detonation.
But, it's eminently do-able and should run toe-to-toe with a stock, 340 V-8 powered car.
Later upgrades would give you the option of going lots faster/quicker at a later date, when you were ready for more power.
Turbocharging a slant six is not for everybody, but, if you want to have something completely different, and have the patience and budget for building it, it certailnly has its advantages...
This one is mine...:wack:
