SBC 18 Degree Cast Pistons?

RTR-1 · Post by **RTR-1** » Mon Mar 02, 2020 1:13 am

https://www.ebay.com/itm/NEW-Speed-Pro- ... Sw8GNdoJJS

Why would anyone build a 18 Degree engine with cast $150 pistons!? I'm guessing there's a demand for a cheap piston under 18 deg heads, otherwise Speed Pro wouldn't make them.

Mark O'Neal · Post by **Mark O'Neal** » Mon Mar 02, 2020 2:01 am

After 40 years of selling parts in this industry, I have learned one lesson beyond all others. People will head to the lowest price with alacrity and verve.

Post by **FC-Pilot** » Mon Mar 02, 2020 2:21 am

I think these guys bought a set

Pau

BillK · Post by **BillK** » Mon Mar 02, 2020 7:51 am

Interesting. They are actually in an old 2002 catalog that I have so they have been around for a while. Might even be discontinued now.

rebelyell · Post by **rebelyell** » Mon Mar 02, 2020 9:07 am

WAG
maybe for a restricted class that had maybe max 9:1, maybe max 6.5K
that said, seems class is defunct/rules changed; if there ever was.
Not listed in 2015 SP cat.

BillK · Post by **BillK** » Mon Mar 02, 2020 9:26 am

rebelyell wrote: ↑Mon Mar 02, 2020 9:07 am WAG
maybe for a restricted class that had maybe max 9:1, maybe max 6.5K
that said, seems class is defunct/rules changed; if there ever was.
Not listed in 2015 SP cat.

I was thinking the same thing. Or maybe a class that required cast pistons.

pdq67 · Post by **pdq67** » Mon Mar 02, 2020 10:22 am

Aren't steel-strutted cast pistons good for like 300hp or a bit more or so.

I think that the high performance 283's used cast up to the 290hp engine and then used forged in the 315hp FI engine if not mistaken.

I had a set of the 283 engine's, 315hp domed, cast pistons from good old W/JCW years ago in my old junk301 and they did fine. Used to go up to 7,500 all the time in the old junk parts unbalanced SOB. Finally broke a stock rocker arm so I retired it.

Pistons were cast steel-strutted and cost all of $39.95 for a set of eight!!

pdq67

dfarr67 · Post by **dfarr67** » Mon Mar 02, 2020 10:41 am

FC-Pilot wrote: ↑Mon Mar 02, 2020 2:21 am

I think these guys bought a set

Pau

That's a pretty savage video- what was the root cause?

Post by **Old as Dirt** » Mon Mar 02, 2020 12:42 pm

Flywheel come apart?

cv67 · Post by **cv67** » Mon Mar 02, 2020 12:58 pm

WOw....everything but the crank and rods took a flying leap!

Tom Walker · Post by **Tom Walker** » Mon Mar 02, 2020 2:18 pm

Believe I read somewhere that the block just couldn't take anymore. Think it is a Cummings 5.9 diesel making some kind of insane torque before the kaboom!

travis · Post by **travis** » Mon Mar 02, 2020 2:30 pm

Meh...I run cast pistons in 20* stuff all the time. What is 2 more degrees?

Don Terrill’s Speed-Talk

SBC 18 Degree Cast Pistons?

SBC 18 Degree Cast Pistons?

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