more 393 piston questions.

I am planning my 393 stroker and I am trying to find some pistons that are not going to cost too much. (KB364's look good, but too much for my budget)
In my research thus far I noticed the STL-H273CP30 seem to result in the same compression ratio as the KB192.
The results I have found have been comparing compression ratio data. See links below and please let me know if I am wrong. Thanks.

http://store.summitracing.com/partde...CP30&view=1024

http://www.amotion.com/fsw.html#10

"302 1968-72 Hyper. 8.4:1 w/63cc Keith Black KB192*8
302 1968-72 Hyper. 8.6:1 w/63cc Sterling H273P*8
"

Thanks again.
Josh

I used stock Mustang 302 pistons. In fact they were 95 versions. Forged trw i think and used stock rods from the 84 truck motor, to make a "387" as i did not bore the old windsor. stock 4.00 bore. 3.850 stroke. [img]/phpBB/images/smiles/icon_smile.gif[/img]

All small block fords use the same bore width from the factory, from the 289 through the 351W. The difference lies in stroke length... The 393 is a good engine, with quite a bit of torque, and able to pack a lot of power for the block size. Anyway, it all depends on if you decide to bore it out any. If not, stock 289/302/351W pistons work, you just need different rods.

5.95 rods stock 351 rods stock 302 pistons 3.85 stroke = 393 ANY 302 piston will work

I think the H273 pistons only have about a negative 6cc dish/relief volume that equates to around 11 to one for a 393. The H272 piston has around a negative 20 cc for a 9.5 to one motor. Both piston should cost about the same.

<font size=-1>[ This Message was edited by: jmaxness on 4/14/04 12:05pm ]</font>

I have a set of Hypereutectic H273CP's at .030 over. Was going to use them but bought the Keith Black's instead. Email me if your interested.
Keep in mind that there are 2 different part numbers that look a lot alike there are 273CP's and H273CP's The first one is a cast piston and the second one is Hypereutectic. There is very little price difference and I would definately recommend H's no matter where you buy your pistons.

the h273cp's have 8cc's valve relief displacement and will have a neg effect regarding compression..been there, done that*********

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On 2004-04-12 10:02, scottin wrote:
ANY 302 piston will work
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for the most part, yes. You have to double check the pin boss-to-counterweight clearance. Some pistons are rather thick in that area, and some cranks are larger than others. Mine hit...Scat 9000 crank and TRW L2482F flat-tops. Every TRW piston I tried hit the counterweight. Broke down and bought a set of SRP flat tops, problem solved (at least that problem was solved anyway)

<font size=-1>[ This Message was edited by: mavman on 7/29/04 8:54am ]</font>