lol i've found that no one mustang is ever a like (obviously) REGARDLESS of what year it is. i had a friend that used to have a 91 mass air car with 3.73s, shorties, x pipe and flows, injectors, bigger mass air, throttle body and such...NEVER could break into the 13's. my friend in his SD 88 coupe with 3.73's, h pipe and spintechs ran a 13.7 and would smoke my other friend everytime. then i had another friend that had a SD 88 gt with 3.55's, longtubes, x pipe and flows, and a few other bolt on's running 15's and 16's at the track. something was wrong with that car though, it was just plain slow.
i wasn't saying the 93's were slower. i was just helping to explain the reason for the re-rating in 93. and as for the silencer, it was about a 5hp loss, but the silencer is on all cars 87-93 so it affected SD cars as well. all the cars are so close though, that it's not a big difference in performance. the only thing different that affected performance was the cam change. and it was so miniscule that it doesn't really matter. so all in all, the rating in 93 was more accurate for ALL mustangs from 87-93. not the rating in 87.
Hypereutectic pistons have a silicon base added to them to help with cold start-up, emissions, less heat soaking properties, piston becomes harder, and they are lighter than the forged pistons.
The majority of the material made up in a piston is aluminum, which expands more than steel the hotter it becomes. By adding silicon to the hypereutectic pistons, it helps keep a more solid expansion instead of being dictated by temperature more so, like it's forged counterpart.
With the piston becoming harder, it becomes more brittle and with some severe detonation it is more prone to cracking.
More than likely the block or rods will go first with a good tune, not the hypereutectic pistons.
Forged pistons are melted under a high temperature and pressured with very high pressure to get all the metal alloys compressed together for added strength. The forged pistons are just a bit more cost to the OEM engines and therefore for that reason and the above reasons, the hypereutectic pistons are being used.
There is no truth to the '93 5.0 making 20 hp less than the '87-'92. That was just a marketing ploy.
You honestly sound like your trying to sell yourself on the idea that Hypers, there is one reason "Only" that Ford stop using them and that is Cost!!! If Hypers were so awesome then Ford would have jumped at the chance to use them in the 03 04 Cobras.
85_SS - Forged are stronger and better for high horsepower applications no doubt. The point is, that they are fine for stock block power applications.
WHAT PART OF MY STATEMENT DO YOU DISAGREE WITH ?
FORGED PISTONS ARE THE WAY TO GO ,IF YOU PLAN BLOWER OR TURBO ,NO DOUBT THE FORGED PISTON WILL TAKE THE HEAT AND THE CHEAP HYPERPEUTIC WILL FAIL UNDER ANY KIND OF HIGH BOOST OR HIGH TEMP.FOR A FEW DOLLARS MORE FORGED IS THE WAY TO GO ,BETTER PLATFORM FOR BUILDING HIGH HORSEPOWER ENGINE AND LASTLY THE SKIRTS OF THE PISTON ARE MUCH STRONGER FORGED AND WITH STOKER MOTORS THAT COMES INTO PLAY .
i know guys running turbos and going 10.50s in the 1/4 mile on stock 93-95 shortblocks!
Forged is more dense.
What kind of piston speed was that piston seeing that the rod pulled the wrist pin out of the bottom of the piston?
I wouldn't blame the piston make-up for that. That is not a common problem in my readings and dealings.
Just looks like a normal post hac fallacy...
It was a .030 over 460 turning 6,000 rpms. I don't know how to calculate piston speed but it had 6.605 rods and a 3.85 stroke if you want to calculate it. They were kieth black pistons. The car was running 6.00's in the 1/8th at 112mph. I just know that the rod didn't fail. This was in a backhalved 91lx coupe with no power adders. I have not ever had a forged piston do this.
I'm not saying that hypuetectic pistons are terrible but I had rather have a forged piston because I have experienced a piston failure before.
It was a .030 over 460 turning 6,000 rpms. I don't know how to calculate piston speed but it had 6.605 rods and a 3.85 stroke if you want to calculate it. They were kieth black pistons. The car was running 6.00's in the 1/8th at 112mph. I just know that the rod didn't fail. This was in a backhalved 91lx coupe with no power adders. I have not ever had a forged piston do this.
I'm not saying that hypuetectic pistons are terrible but I had rather have a forged piston because I have experienced a piston failure before.
In simple terms, if going by 6,000 RPM (formula varies other than that), you can multiply the stroke x rpm.
So 3,850 fps. That is quite quick...
A lighter piston with that type of piston speed becomes more and more ideal as the feet per second goes up. It becomes sort of like a slingshot going back and forth with the weighted end going thru many starts and stops...
But then again I haven't heard 'perfect' things about Keith Black's budget pistons
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?