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-   -   S14 SR Rebuild OEM+ vs Forged? (#/f/showthread.php?t=679178)

RalliartRsX 06-07-2021 12:03 PM
Why?? The engine is already open, spend the few hundred and get the proper forged pistons.

Stock SR piston in any SR is at the least 20+ years old.....

Spend the money on the right builder, and your shit will be reliable for a LONG time. King just hasn't found the right sauce/recipe yet

Future240 06-07-2021 07:33 PM
Quote:
Originally Posted by RalliartRsX (Post 6410767)
Why?? The engine is already open, spend the few hundred and get the proper forged pistons.

Stock SR piston in any SR is at the least 20+ years old.....

Spend the money on the right builder, and your shit will be reliable for a LONG time. King just hasn't found the right sauce/recipe yet
When I say stock pistons I meant new ones.

RalliartRsX 06-07-2021 10:20 PM
Nope. Stock pistons are not cheaper by any significant margin than a forged piston for me to even consider it.....much less that they are a 30 to 40 year old design and spec

No thanks

spooled240 06-07-2021 10:49 PM
Quote:
Originally Posted by Future240 (Post 6410728)
So what about a semi built engine forged rods, stock pistons?
With your goals you could even go with stock rods with forged pistons

PoorMans180SX 06-08-2021 05:45 AM
I'm telling you, get some Mahle pistons if you're really concerned about the forged piston slap and engine wear. The high silicone forgings are stronger than stock but expand less with heat. They really are the best option for a 'daily driver medium power' style forged engine build. https://www.us.mahle.com/media/usa/m...t-2020-web.pdf

If you're going to be on pump gas, you don't need the upped compression of most pistons anyway.

RalliartRsX 06-08-2021 08:27 AM
^^ Yep. That is where my mind is at too.

No reason to go with stock piston with today's offerings.
Tech has progressed immensely in the years since a full SR swap was 2K picked up from an importer

e30gangsta 06-08-2021 08:28 AM
I actually have a set of those mahle power pack pistons for sale if anyone is interested. I will let them go for cheap and they're brand new.

Future240 06-09-2021 02:56 PM
Aight, So Mahle pistons, go it. I was thinking eagle rods.

PoorMans180SX 06-10-2021 05:48 AM
Quote:
Originally Posted by Future240 (Post 6410835)
Aight, So Mahle pistons, go it. I was thinking eagle rods.
I know there are plenty of people who have had good luck with Eagles over the years, but to me their quality control is subpar, or at least was a few years back. We've had some come through with big ends out of spec, and we had a series of them break at power levels they should not be breaking at.

I would go with Manley if you want the cheap h-beams, but I think it's worth the one-and-done of the big boy I-beams, or Wiseco boostline. For 'safety's sake'.

NiSilS14 06-10-2021 01:40 PM
I'm surprised no one has touched on this, but it's crucial a machine shop bore and hones with torque plate especially with alloy blocks. They tend to distort more then cast iron engines. Also adding in ARP head studs and/or ARP main studs will distort them even more. Mahle pistons are great, I've used them in customer builds as well as my own cars. The ptw clearances are tighter with 4032 alloy pistons so be sure the machine shop is aware of that. If you are able to, always triple check the work after getting it all back.

Future240 06-10-2021 08:22 PM
^^^^The shop I am getting to build the SR is
https://www.facebook.com/NightOwlPerformance/

It is a local shop so I doubt yall have any thoughts on it.

Quote:
Originally Posted by PoorMans180SX (Post 6410852)
I know there are plenty of people who have had good luck with Eagles over the years, but to me their quality control is subpar, or at least was a few years back. We've had some come through with big ends out of spec, and we had a series of them break at power levels they should not be breaking at.

I would go with Manley if you want the cheap h-beams, but I think it's worth the one-and-done of the big boy I-beams, or Wiseco boostline. For 'safety's sake'.
Manley rods are so cheap it makes me kinda worried lol. I am looking at the Tomei Rods.

https://www.rhdjapan.com/tomei-h-bea...-sr20de-t.html

RalliartRsX 06-11-2021 12:10 AM
Manley holds a pretty significant market share

I wouldn't pay the premium for #jdm when stateside stuff is not only cheaper, but in some cases, better.

My 0.02c

splitfire 06-22-2021 12:08 PM
Quote:
Originally Posted by Kingtal0n (Post 6410679)
...
I would not put a forged piston into an SR20DET unless I was aiming for over 500rwhp.
...
...
To put it another way... of course 98% of individuals are going to say that the stock piston isn't capable or is too weak for XXX power. That is because they lack the skill set necessary to make it work to it's full potential. Forged pistons are a crutch that allow one to be terrible at engine config and worse at tuning because forged piston withstand the abuse of ignorance at the cost of mileage capability and reliability not to mention quintupling the cost of said engine.
Quote:
Originally Posted by Kingtal0n (Post 5987758)
very well said. I completely agree and do not take stock pistons on my OWN sr engine past 400bhp. If I wanted more I would step up to a V8 or 2J, forget opening the sr20 IMO.

Seems like you changed your mind a bit over the years :)


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