whtbronco
Full Access Members
~425hp would be kinda fun in the Expedition, but that price tag is certainly steep.
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I would say that safe would be more like 5-7lbs of boost and also keep in mind that the tune is also a key factor. Running low boost, with a safe A/F ratio and low timing advance will allow hypereutectic pistons to live in a boosted environment. I ran a supercharged 4.6 4V Mustang Cobra for 15 years with no issues because I didn't get greedy looking for more power.I thought you could run some boost, less than 10lbs, with hypereutectic pistons and anything over 12lbs required forged without question. I suppose there are no guarantees without forged pistons and rods though.
You do have some serious thinking to do.
I would say that safe would be more like 5-7lbs of boost and also keep in mind that the tune is also a key factor. Running low boost, with a safe A/F ratio and low timing advance will allow hypereutectic pistons to live in a boosted environment. I ran a supercharged 4.6 4V Mustang Cobra for 15 years with no issues because I didn't get greedy looking for more power.
Yeah the Cobra 4.6 motors had forged internals. They were definitely built for boosting.
Sorry, I did not mention the year. The later 03 / 04 Cobra engines were built really strong. but the 96-98 Cobras (we had a 98) had a really good forged steel crank, but super weak powdered metal rods and Hyperucraptic pistons. Everyone - and I mean everyone - in my circle that pushed the boost and / or the tune on those engines either knocked the rods out of them or cracked pistons. Low boost and a safe tune are the keys to making these stock short blocks survive.
This kit advertises 8-9# of boost. And it looks like a learned a new term: hypereutectic. Is that what I mistakenly understood as “hyper-silica” pistons? Like I said, plenty of research to do.I would say that safe would be more like 5-7lbs of boost and also keep in mind that the tune is also a key factor. Running low boost, with a safe A/F ratio and low timing advance will allow hypereutectic pistons to live in a boosted environment. I ran a supercharged 4.6 4V Mustang Cobra for 15 years with no issues because I didn't get greedy looking for more power.