TA 1607 piston questions

I've been scouring the boards for some info on these, thinking of using them in my fairly mild street/strip 455 build.
Is pin height 1.997? If so, that is a very nice change for quench.
What cc is the dish on the "10:1" pistons? This I haven't been able to find any definitive answer on, and would like to do some compression calculations to see if they'll get me where I want to be.
Lastly, I know a lot of the time it is recommended to upgrade to forged pistons. This engine will be all iron, small valve, figure MAYBE 425-450 hp range, and I can't see a need to spin it more than 5500 rpm, mostly just street driving anyways. Are these a suitable piston for that kind of work, or is it really time to go forged? I will have arp rod bolts installed, rods resized, and the rotating assembly balanced either way.

Thanks
Ethan

 

1.990" compression height, 23cc dish. They should be fine for your application.

 

Looks like I'll be mic'ing the bores, and probably making a phone call today. Thank you!

 

is there a max. power level for this piston? e.g. can be used until 450hp and above a forged piston ist needed?
I'm building an all iron street engine and not sure if should go cast or forged piston. Do forged pistons always make a noise when the engine ist cold or does this depend on the machine shop(wall clearance)?

 

Piston-to-wall clearance will be a bit larger for forged pistons; the shop should always use the piston manufacturer's recommended clearance.

As for noise? Sorry to say, the forged piston jobs I've done have always been accompanied by some exhaust noise, too!

A high quality cast piston will live a very long life, but its resistance to detonation is the key here. If you're knocking (pardon the pun) on that door with high cylinder pressure + low octane fuel, a forged piston will be more tolerant than a cast. Ignition timing plays a big part in this stuff too.

Devon

 

thanks for the information, my machine shop told me that for about 400-450hp and 5500rpm the cast pistons should be fine, so I would tend to this one at the moment. Here in Europe the standard fuel quality ist 95 octane, with the right timing knocking should not be an issue.

Another point for my build is to build it to zero deck as often recommended. With these TA 1607 pistons on a stock 455 block I would have following results.
A simple math dividing the stroke in half (3.9 / 2 = 1.95 inches) and then adding my stock 455 connecting rod length 6.6" and compression height as mentioned above 1.990". This(10.540) is then subtracted from the stock engine’s deck height (10.570") to find the deck clearance. In this case the piston would be 0.03" below deck, right? Is that a problem, good or bad? Am I right with this calculation and should I go for 0.00",zero deck?

Attila