Stevec

Does anyone know where to buy a set of .30 or .60 over pistons for a 400 engine?

Thanks.

Steve...

allyolds68

Check Kanter, They used to list them.

I thought you decided to go with the 455

edit: I just looked at Kanter and they list pistons for a 65-69 400......bullsh!t. They used to list 68-69.....

Stevec

Well I rebuilt the top end of the 400 and I'm just pricing out some parts for a future (2 years from now) total build. Who knows maybe I will do a 455 but I like having a numbers matching car to.

Decisions decisions...

2blu442

Egge has pistons. Here's a link to their web site:

http://www.egge.com/site/?d=48&dt=1&...SMOBILE&rpp=10

Stevec

I'll check em out! Thanks guys..

Steve.

Octania

0.300 or 0.600" is one hell of an overbore!

:-)

perhaps you meant 0.030-0.060"

aliensatemybuick

Of course the guys who like to point out spelling errors would never have caught that; we all knew what he meant though.

ah64pilot

Perhaps this should be in the big block section...it might get more exposure.

cutlassefi

True.

But how about we step out of the box;

68-69 400/455 Olds crank, 4.25 stroke
65-67 400/425 Olds Rod, 7.00in length
Keith Black Icon IC846 Mopar piston, 1.465 comp distance.

2.125(half the stroke)+7.00+1.465+10.590. Stock deck height is around 10.625, you can cut the deck if you like. Just an fyi, the popular combination in a 455 of the L2323 piston, stock rod and crank comes in at 10.595.

IC846 Piston is 3.910 std bore available in std., .030, .040, .060 over with a .984 pin. You can hone the Olds rod (.980) .004 to fit or bush it for the .984 pin. Plus that .984 pin is much lighter than the Olds/Pontiac .980 pin.
Compression would be around 9.75-10.0:1 depending on deck height etc.


Problem solved, and with a much better piston with a much better ring pack. If the walls are thick enough you could also use the IC744 with a 4.00 bore. Compression distance and pin size are the same as the IC846.

Jmo.

501Paratrooper

I used Egge. They messed one of them up and was a bit of a pain to get them to replace it. But they did come through eventually.

64Rocket

Mark,
Nice combo with the 4" piston and the 4.25 stroke, nice 427 cid.

Gene

Stevec

Hey Mark what would you rate something like that as far as power? have you done it
before? That sounds like a great engine..

cutlassefi

No haven't done it but I'm all about trying different combinations.

I would say apples to apples the overbore to 4.00 would probably get you another 30-40hp/tq.
But that would open up the possibility of a larger cam, carb etc. And the insides would be a bunch lighter, that's always a good thing.