Picked up a short block and 347 parts.

[racrguy]

Well, I thought it was clear it was separate.

Would that require a special machine shop? Or can I go to the local planned parenthood and ask to borrow the ultra sound?

A competent machine shop should be able to check straightness and magnaflux the parts for cracks.

[jyro]

just use a old kenwood speaker magnet

Well, I thought it was clear it was separate.

Would that require a special machine shop? Or can I go to the local planned parenthood and ask to borrow the ultra sound?

and the metal fillings out of an old etch-a-sketch, after all, you only have to check 6

[shumpertdavid]

You'll have to call the manufacturer, a lot of places sell singles but it's not something they advertise. When you're looking through a catalog and see the weights of things it's an average and all the components are within a tolerance of that number. Good performance rods are matched to be as close as they can be from the factory. You need to pull at least a couple of rod/pistons apart and weight the ends and call probe and see if they can get you a couple that can complete the set, the same with pistons. If I were you I'd have the rods, pistons and crank checked for cracks, when you see a set of rods and pistons that are short it can be an indication that the engine was blowed the fuck up.

Solid advice.

[91CoupeMike]

How much difference in power would a 4.125 piston have over a 4.040?

Idea is to have a single turbo set up

[cool cat]

How much difference in power would a 4.125 piston have over a 4.040?

Idea is to have a single turbo set up

Why did you but 6 X 4.040 pistons if you want to build a dart block with 4.125 bore? Are you going to coat the 4.040 pistons in JB Weld to make up the difference in size?

[STROKD]

Why did you but 6 X 4.040 pistons if you want to build a dart block with 4.125 bore? Are you going to coat the 4.040 pistons in JB Weld to make up the difference in size?

hahahahahahaha

Mike, the difference in power really matters in the heads. if the heads are unshrouded on the 4.04 bore, then the power difference from going from a 349 to a 363 is maybe 10-15 rw (all things being equal picking up 14 CID)... or maybe half to a pound of boost drop in turbo pressure.

it isnt really worth worrying about unless you have some huge ass valves in the heads that are shrouded in the 4.04 bore and not in the 4.125 bore... if thats the case, then Id suspect you could pick up 30+ rw or so. Bigger bore is always better, but it isnt truely necessary if the heads don't require it. The larger bore just helps the better, larger-valved heads do work. At least that is how it was explained to be my Keith Craft.

[91CoupeMike]

Why did you but 6 X 4.040 pistons if you want to build a dart block with 4.125 bore? Are you going to coat the 4.040 pistons in JB Weld to make up the difference in size?

Bought a stock short block and the guy threw these in extra because he didn't want them, bought a crate engine instead. I spent 100 on everything.

I was debating using the 4.04 instead for the sake of costs. I'll be getting bigger heads at some point. It's all speculation right now.

[91CoupeMike]

Here is one:

[cool cat]

Bought a stock short block and the guy threw these in extra because he didn't want them, bought a crate engine instead. I spent 100 on everything.

I was debating using the 4.04 instead for the sake of costs. I'll be getting bigger heads at some point. It's all speculation right now.

Oh gotch ya. Stick with the 4.04 for now. For shits n giggles google "Joe Sherman 347", you can see some interesting builds with stock blocks as well as Dart block builds.

[91CoupeMike]

Oh gotch ya. Stick with the 4.04 for now. For shits n giggles google "Joe Sherman 347", you can see some interesting builds with stock blocks as well as Dart block builds.

I just looked at them. Fuck! 771hp and 8800rpm out of a 357

[shumpertdavid]

those pistons look to have a decent dish to them, if the 6 are in useable shape, and the compression ration works with the dish, save the coin and run em.

[91CoupeMike]

those pistons look to have a decent dish to them, if the 6 are in useable shape, and the compression ration works with the dish, save the coin and run em.

The dish is 13.8cc. Not terrible but certainly not the best for n/a.

[shumpertdavid]

Depends on combustion chamber cc's. My new regal pistons have a 14 cc dish, they will yield me a 10:1 compression ratio with the headgasket thickness I have and the factory 46cc combustion chambers. I'd guess yours and a 62cc chamber would still make fair n/a compression ratio

[junk racing]

Shit compression makes the turbo spool quicker...mines 11.1 lol

[Clifton]

Stroker motors are overrated.