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  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-

Beginning To Build 5.0 Motor Need Help

  • Thread starter Thread starter DSMwindzor
  • Start date Start date May 21, 2013

DSMwindzor

New Member
Apr 21, 2013
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blacksburg,sc
May 21, 2013
#1
  • May 21, 2013
  • #1
I have hypercuetic (honestly don't know how to spell that haha) pistons that originally came out of the motor I'm building. Machinist said they were still usable so my question is. Since my long term goal for this motor is a daily driveable high 300hp low 400hp. With some nitro every once in a while.
- how good do hypercuetic pistons hold up to that?
- should I go forged? I only plan on small shots of nitrous
- any particular piston rings I should get?

For the top end if it matters I plan on going with some afr's that will keep my compression ratio about the same as stock. I have no clue what cam I need or intake (that's for a later day)

But for now I'll worry about bottom end
 

revhead347

Apparently my ex-husband made that mistake.
20+ Year Stangneter
Jun 14, 2004
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Acworth, GA
May 21, 2013
#2
  • May 21, 2013
  • #2
Without the nitrous, those pistons should be fine. If you are going to put any nitrous on it, I would go to another piston. And please call it Nitrous, not nitro.

Kurt
 

VibrantRedGT

"STANGNET'S PENGUIN SMACKER"
15 Year Member
Nov 29, 1999
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Boca Raton, Florida
May 21, 2013
#3
  • May 21, 2013
  • #3
If you're building a new motor why not put better pistons in the motor than stock? This way it's not an issue and it's not a ton of money either. Better to have piece of mind.

I'd get a custom cam with your AFR heads. Can easily make 300HP to the wheels with custom cam, AFR's, good induction and exhaust.
 

RangerJoe

I leave the horn on while driving
15 Year Member
Apr 26, 2010
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Georgia
May 22, 2013
#4
  • May 22, 2013
  • #4
+1 on the forged pistons. Also, if you go with a forged pistons with bigger than stock valve reliefs, you could run the larger(185cc+) AFR head with 2.02 valves, if you wanted to. Although, the AFR 165's with 1.94 valve would probably work well for a 302/306.

Joe
 
M

mustangjason

New Member
Apr 25, 2011
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1
May 23, 2013
#5
  • May 23, 2013
  • #5
+2...I used hypers in my last engine build and tried to just run 6 psi of boost and that failed when they scattered.
 

revhead347

Apparently my ex-husband made that mistake.
20+ Year Stangneter
Jun 14, 2004
9,297
1,641
214
Acworth, GA
May 23, 2013
#6
  • May 23, 2013
  • #6
Nitrous makes a lot of heat. It just doesn't work well with cast pistons. If you are building a basic N/A H/C/I engine, there is nothing wrong with going with a $200 set of Speedpro cast pistons. Once you add the nitrous in, I don't recommend it.

Kurt
 

2L8ULUZ2

Will kiss Moderator ass for title
Founding Member
Sep 24, 2000
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WNC
Jun 11, 2013
#7
  • Jun 11, 2013
  • #7
I hit my factory pistons with a 150hp shot for a couple years and managed to keep it all together. The key is to avoid ANY detonation. Now with that being said there is no way I would build a motor and put stock pistons back in it. Even a set of the cheaper Speed Pro forged pistons will be far better than those stockers.
 
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