Author Topic: Pistons: Replacement  (Read 1269 times)

GAR3598

  • Newbie
  • *
  • Posts: 1
    • View Profile
Pistons: Replacement
« on: April 16, 2023, 12:18:59 PM »
 Original block from 1969 Z28, (Original pistons 11.1) ,  it needs to be bored. Looking for recommendations for piston brands that have been tried & trued
Thanks

David K

  • Hero Member
  • *****
  • Posts: 1122
  • Dr. Longblock
    • View Profile
Re: Pistons: Replacement
« Reply #1 on: April 26, 2023, 02:27:46 AM »
TRW

ric1969

  • Member
  • ***
  • Posts: 55
    • View Profile
Re: Pistons: Replacement
« Reply #2 on: April 26, 2023, 12:22:44 PM »
 JE pistons they are the same design as the originals and better quality.

Jerry@CHP

  • CRG Member
  • *****
  • Posts: 1512
    • View Profile
Re: Pistons: Replacement
« Reply #3 on: April 26, 2023, 06:08:11 PM »
Two vendors make them, and they are just as the originals.  J&E and CP are the only vendors and are made specifically for NHRA Stock Eliminator.  Both are not crazy money and better quality than the current and old TRW pistons.  The only TRW piston available now is the 12 1/2-1 and have the smaller ring lands, 1/16 and 1/8" oil ring, and you have to cut the dome.  Cosmetically there are much different than originals.

The J&E and CP have the correct dome height and ring lands, 3/16" oil ring and 5/64" top and 2nd ring. They're not thousands of dollars either.  Andrew from Hendrick Motorsports does all of our machine work along with Keith Dorton, brother of the late Randy Dorton.  We've rebuilt and restored hundreds of 302s over the past 25 years and thanks to our sponsorship with HMS we have the best machinists on the planet doing our work.   We are very thankful for that.

If you have questions, you can always email us.  Be glad to help. 

Jerry

David K

  • Hero Member
  • *****
  • Posts: 1122
  • Dr. Longblock
    • View Profile
Re: Pistons: Replacement
« Reply #4 on: April 26, 2023, 06:45:24 PM »
What Jerry said.

Jerry@CHP

  • CRG Member
  • *****
  • Posts: 1512
    • View Profile
Re: Pistons: Replacement
« Reply #5 on: April 26, 2023, 07:19:41 PM »
Also remembered that Diamond Pistons in Michigan is also making them.  Racing buddy, Ben Wenzel has bought them and they also work fine.  All of these pistons make more power than the originals too. 

Jerry

Jerry@CHP

  • CRG Member
  • *****
  • Posts: 1512
    • View Profile
Re: Pistons: Replacement
« Reply #6 on: April 26, 2023, 07:28:49 PM »
Here's one of the hypereutectic 302 pistons we tried years ago.  Problems and had to stop using them. 

Jerry@CHP

  • CRG Member
  • *****
  • Posts: 1512
    • View Profile
Re: Pistons: Replacement
« Reply #7 on: April 26, 2023, 07:30:13 PM »
Wrist pin issues......

 

anything