Use what ever you want. It all works good.
Frank
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| High compression build with cast pistons? https://slantsix.org/forum/viewtopic.php?t=50846 |
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| Author: | 66aCUDA [ Sat Jan 19, 2013 3:47 pm ] |
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Use what ever you want. It all works good. Frank |
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| Author: | slantzilla [ Sun Jan 20, 2013 8:51 am ] |
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IF you keep it out of detonation cast pistons will live forever. Detonate it very much and even forged pistons will not last. |
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| Author: | Dart270 [ Sun Jan 20, 2013 12:47 pm ] |
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My understanding is that forged pistons are reallly for strength at high revs (over cast), but forged are not drastically stronger than cast when overheating them with detonation. Lou |
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| Author: | Sprag [ Sun Jan 20, 2013 8:05 pm ] |
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Thanks again for the advice, it really helps and now I think I've done it right so far  My plan is to keep the RPM out of the stratosphere, stay away from the spray and focus on getting the dynamic compression right once I upgrade to the high compression set-up later on. For now, the stock stuff is looking pretty good for the first stage since everything other than the mild bump in SCR (9 - 9.5:1?) will be "optimized" stocker stuff. After the pistons go in, I'll start measuring and ask for a double check on my first attempt at making an accurate DCR calculation.Stage Two planning is underway - Offy 4 bbl intake has arrived, header dreams run rampant and the separate budget for the E85 carb is in the works. 
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| Author: | NCDemon1971 [ Sun Jun 23, 2013 9:27 pm ] |
| Post subject: | Re: If stock... |
Quote: So far my 1980's engines have had a stock deck heght in the .175-.190 range making it hard to make a 'guess' without actual measurements. The peanut plug head has seen a range of about 56-52 cc at the chamber after taken off the engine without modification...the 1976-1978 head are a bit tighter in the 53-54 cc range stock...
I have noticed this to. My previous bracket car ('71 Duster) was a 1974 steel crank engine with a later style peanut plug head. I recently had a tube style head from a 198 milled over .100 and when compared to the peanut plug head, it shocked me at how close the chambers looked. The peanut plug head was stock/untouched. To get 12:1 out of a 1963 block and 1978 head I ended up cutting .120 off the block and about .100 out of the head....(you will need ARP head studs after this...) FYI, -D.Idiot Maybe I should have done the peanut plug style head. I already had hours of port work into the 198 head though and if you are weight freak like me, the tube heads are a tad bit lighter. Good info, D.Idiot! |
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