I am building a 400 and was wondering if these pistons will fit with my Pink rods that I I got out of a 350 engine. It says that they are for a 5.7" rod which is what the 350's have. So I am assuming that they will work. I hope they do because I want something with lower compression so that I can run a supercharger later on.


http://store.summitracing.com/partde...2F30&view=2047

 

They will if you are building a 377.
With the 400 crank they might stick out of the hole just a little bit.

 

no dice...

 

So where can I find some reasonably priced lower compression forged pistons for my 400. I am correct when I say that a 400 uses a 5.7" rod, right? Doesn't it also use a 3.75" stroke crank, and a 4.125" bore?

 

400 uses a 5.565" rod, not a 5.7

 

A 400 uses a 5.565 rod which, not by coincedence, is shorter by half the difference in strokes between the 350 and 400 crank. 350's use a 5.7 rod.

edit- B+B beat me to it.

 

Maybe something like this? I will want something forged and lower CR but theoretically it will work, right?

http://store.summitracing.com/partde...5P30&view=2047

 

Those look like they have the right pin height.

 

no they dont. read the description. they are for a 377 (3.48" stroke/5.7 rod) or a 400 using STOCK 5.565" rods. they will not work on a 5.7" rod 400. you'll end up with pistons hanging .135" out of the hole.

 

I am thinking maybe these and using aftermarket forged rods:

http://store.summitracing.com/partde...2F30&view=2047

 

those arent rods, those are pistons...

 

I know that is why I said "maybe these (pistons) and using aftermarket forged rods"

 

use a piston specifically designed for a 5.7" rod. it will reduce wear in the cylinders, as well as making the engine less prone to detonation.

 

I think he found the right pistons in his 8:40 PM post

http://store.summitracing.com/partde...5P30&view=2047

 

i'd be careful supercharging with a CR that high...

 

Those second pistons you picked at Summit are the ones you want.

Specifications:
* Bore: 4.155 in.
* Stroke: 3.750 in.
* Rod length: 5.700 in.

Sounds like what you have, right?

BackInBlack is right about the CR. Be careful how much PSI you run.