67mustang302

It depends on what you want. N/A builds are nice because of greater simplicity, less stuff to plumb in, less heat on internal components etc. Turbo definitely allows for a lot of power on pump gas in a reasonably small engine setup, so you still retain decent mileage, and you don't need wild cams to make power in blower apps, so better drivability etc etc.

Personally, I like n/a because of simplicity, and it's a tad more impressive to build big power n/a than blown. Blower engines can make insane power on pump gas though. The extreme example being cars like the SSC Aero versions, that put out over 1,000hp in factory trim.

tinman

Plan on buying an aftermarket if you are serious about the turbo thing. Heads too as the factory heads just won't flow enough.
LOTSA $$$$

txstang347

What exactly are the advantages of 331 vs. 347 deck heights?

primetime5.0

^^^ yes please enlighten us.. you better not say anything about " rod ratio " either

NoGo95GT

Turbo http://www.on3performance.com/mustang50.html Have read great results with this kit!

mustangmike33

hey guys its been awhile but im back, lol. im sure you missed me, lol. anyway if you wanna know the truth, it basically depends on what you want out of it. with the 347, like everyone says its gonna cost you some money. you have to buy a crank, rods, pistons, bearing, gaskets, new bolts (old ones may be stretched under torque), it needs to be rebalanced under 28 oz instead of 50 oz. the blocked will most likely have to be cleaned no matter what, bored .030, and notched for crank clearance. a good kit, depending on how much power your wanting to make can cost anywhere from $800 to $1500. but in the end you'll have a bottom end you can count on to not wear out a week or two later. also, is your stock motor capable of handling the kind of power a turbo will put through it? the turbo kit will be easier to do because you can install it without pulling the motor. but id much rather have a 347 than a turbo because when you have fast car all motor, compared to one who is boosted, imo in the mustang world all motor cars are much more appreciated. dont get me wrong a turbo looks sweet and sounds amazing, but any forced induction to me unless your pushing 5-6 lbs of boost is alot on a stock bottom end. besides either way you look at it, youll have to upgrades your heads if you wanna get full power, so in other words build a healthy bottom end, run some nitrous, or all motor, and save up for a turbo at a later date. End of story.

im here all week!! lol.

OnyxCobra

There was a guy on here with a turbo stock longblock 302 and he was making like 430whp, so I'd have to go with turbo.

wagontrain

It has to do with rod to stroke ratio,but not why I don't like it.Having that long of a stroke and short rod puts alot of thrust load on the skirt, skuffing the piston, also the longer stroke pulls the piston out of the bottom of the bore making the piston rock more wearing out the rings and piston.my .02

NoGo95GT

I am going to respectfully agree to disagree with you. The stock 5.0 motor is a very, very stout performer. In a well taken care of 5.0, the block will fail well before the internals will. Look at my car: Stock bottom end with hyper pistons and 15psi(16-17 winter). The motor has been holding up great for the past year and a half with repeated drag strip abuses. And you mention that a N/A motor is far more appreciated than a turbo motor. Truth be said, I appreciate anyone who takes the time to work on their car. If a boosted 302 beats a N/A 347 would you cry foul and say he is cheating because he is F/I and you are all motor. But the turbo guy could also retort that he is cubically disadvantaged. Chances are, that person put just as much time putting in that turbo, as you did building a 347.

Topher306

The engine's still currently out of the car being put together (ref:avatar) but I'm building a 347 right now and I'm really enjoying it. And as said before, can always turbo it later.