Pistons to use when de-stroking?

[mcaracter]

Hi, I'm rebuilding an engine. It's a 1989 2.5 commom block that I want to de-stroke to a 2.2. I know I need a 2.2 common block crank. That's the easy part. But I'm not sure what pistons I need. I'm re-using the common block rods. Also, the block has been bored .020 over.

Put simply, I think I need to know what year I need the pistons from so that everything will work together.

Thanks a million.

[brummy]

Wouldn't you just use 2.2 pistons?

[turbovanman]

Use 88 or 89 turbo 2.2 pistons.

[Mopar_Nutz]

Or if you want to make it easier on yourself, 87-91 2.2 TII/TIV pistons

[Turbo Charger]

Quote:

Originally Posted by mcaracter Hi, I'm rebuilding an engine. It's a 1989 2.5 commom block that I want to de-stroke to a 2.2. I know I need a 2.2 common block crank. That's the easy part. But I'm not sure what pistons I need. I'm re-using the common block rods. Also, the block has been bored .020 over. Put simply, I think I need to know what year I need the pistons from so that everything will work together. Thanks a million.

What they said.

You can use either the cast or the forged crank just so you know. I'd just go with a cast one though, I don't think anyone has ever broken one and they are lighter. More HP

[turbovanman]

Quote:

Originally Posted by Turbo Charger What they said. You can use either the cast or the forged crank just so you know. I'd just go with a cast one though, I don't think anyone has ever broken one and they are lighter. More HP

Depends on his power and boost level. If he's going for big numbers, forged is best insurance, been there done that. One wrong move and he has 4 new ashtrays.

[Una]

Quote:

Originally Posted by turbovanman Depends on his power and boost level. If he's going for big numbers, forged is best insurance, been there done that. One wrong move and he has 4 new ashtrays.

He was talking forged crank vs. cast crank.. Pistons it's a no brainer, you get what you pay for.

[turbovanman]

Quote:

Originally Posted by Una He was talking forged crank vs. cast crank.. Pistons it's a no brainer, you get what you pay for.

Hahhhaaha, missed the crank part, doh!

But with cranks, doesn't matter, there both good, but the cast crank is alot lighter, as Turbo Charger pointed out.

[mcaracter]

I'll be going with the cast crank for that very reason.

As far as the pistons go, I really wanted forged but budget won't allow it. As a starving college student it will be a miracle if this rebuild gets finished at all. Besides, it's not THAT hard to change the pistons down the line.

[turbovanman]

Quote:

Originally Posted by mcaracter I'll be going with the cast crank for that very reason. As far as the pistons go, I really wanted forged but budget won't allow it. As a starving college student it will be a miracle if this rebuild gets finished at all. Besides, it's not THAT hard to change the pistons down the line.

No, but its a PITA when you do it a few times a month, lol!