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| forged or Hypereutectic Pistons with cast crank? https://slantsix.org/forum/viewtopic.php?t=46956 |
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| Author: | xjarhead [ Sat Nov 12, 2011 1:50 pm ] |
| Post subject: | forged or Hypereutectic Pistons with cast crank? |
Hello everyone, Lets begin buy say i am not an engine builder by any stretch of the imagination. But I have friends who are, but mainly run chevy's and not familiar with mopars much. I want to rebuild the slant in my 86 for better performance (low end torque and fuel milage) using better technologies in hopes that the engine may last longer. After some research on here and reading Doc's engine builds it become apparent that either type of piston that is available is based off the 198 rod. Which has to be narrowed to fit the cast crank. I would like to avoid this step if possible. I also read that mopar stroker rods were an option and that they would "bolt right in to the cast crank." I assume no narrowing required? Any advise would greatly be appreciate. Thanks Dave |
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| Author: | DusterIdiot [ Sat Nov 12, 2011 3:55 pm ] |
| Post subject: | Er...Performance or Mileage? |
The reason for the "exotic" pistons is for performance purposes. Forged pistons tend to hold up to the abuses of boost and adders better than the cast slugs the stocker uses. Hypereutectics are lighter and stronger than the stock cast pistons and would make a better selection. But other questions remain at this point: Most of the research and use of the parts you are suggesting were primarily for performance use (which these builds tend to "abuse" the engine while being pushed to the limit of their design). I cannot personally see popping the $$$ for the long rods, and the 2.2L pistons and mods if I were building a low compression daily driver mile miser. A well prepped stocker that is properly maintained (and non-raced) is known to hold up for anywhere from 130K-200K miles which can be put together for about $1200 or so...Long Rod/stroker/ etc... already blows $700 of that on rods pistons, flycutting, etc... Food for thought- -D.Idiot |
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| Author: | xjarhead [ Sat Nov 12, 2011 5:44 pm ] |
| Post subject: | |
I agree 100% with what you are saying. The use of theses pistons was a suggestion from my friends, the chevy guys. They were probably not aware of the lack of piston choices for the slant. My next question would be who makes a good quality cast piston? And thanks very much for your response. We both seem to be on the same page here. Dave |
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| Author: | Brussell [ Sat Nov 12, 2011 6:14 pm ] |
| Post subject: | |
http://www.campbellenterprises.com/slan ... istons.php I was looking at those a while back and decided they were a little expensive for $1000 when you can shave the head for same compression. I thought they could bolt right on (Could be wrong) http://www.pentastarparts.com.au/sunsho ... _list&c=48 This might give you abit of a ball park for some slant 6 pistons and rings. It's from an Australian company, I am sure you could find something similar and probably cheaper where you are. I think Hypereutectics would be a decent choice, not much more expensive. Guessing you won't take the car racing, and it's not a turbo application etc I think other parts of the engine would fail well before the pistons do. (Though I could be wrong, just trying to help) |
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| Author: | DusterIdiot [ Sat Nov 12, 2011 7:38 pm ] |
| Post subject: | Holy Shoot!!!! |
$475 for a set of stock replacements isn't even close (matched set of Fed mog pistons and rings would be 1/2 that) Unless you find some old TRW or other brand pistons on an old shelf somewhere, Fed-Mog is what you get in the US. (Northern Auto Parts usually has a full rebuild set for $538 or so, with all that, a cam, oil pump, gasket set, etc...) -D.Idiot |
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| Author: | Brussell [ Sat Nov 12, 2011 9:47 pm ] |
| Post subject: | |
O.O Well I'll be dammed. |
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| Author: | xjarhead [ Sun Nov 13, 2011 10:33 am ] |
| Post subject: | |
Thank you everyone for all the replies. Looks like cast it is. Dave |
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| Author: | Brussell [ Sun Nov 13, 2011 10:51 am ] |
| Post subject: | |
I just found this site http://www.enginetechcatalog.com Perhaps it will help you, I'll sure get benefit from it down the track. |
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| Author: | xjarhead [ Sun Nov 13, 2011 11:00 am ] |
| Post subject: | |
Thanks for the site. Dave |
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