I asked the machine shop if .60 over was fine for a turbo application and they said that it would be fine. They are a performance machine shop so I would hope that they have some credibility. I am trying to build this as cheap as possible. I already expected to spend some money on the motor. since the car is being built with side job money and construction is slow (hunting season is here also)I am going to buy parts as I can afford them

 

A) No turbo build should be done on the cheap.

B) .060 over isn't fine on even a mild performance build, let alone a normal turbo build. This isn't a big block chevy. 289/302 motors use thin wall castings to save weight. Boring that far over standard cuts off a lot of the cylinder walls and is extremely likely to cause severe cooling issues.

 

Yeah, hyper pistons and .060 over on a turbo 302 is a hand grenade waiting to go off.

 

First of all, what year is your block??? Secondly what type of heads are you going to buy? More importantly for now, aluminum or iron, and what CC chamber? Finally, what is your horsepower goal? My 72 302 block (stroked to 347) is .060 and I have no heat issues whatsoever. I have a 180 thermostat in it and the hottest Ive ever seen it is 190 on the gauge, in the middle of summer. The more compression, the more heat you will build, but I have 10.5 to 1 compression N/A with aluminum heads, which help to keep the heat down. I am making about 425 at the crank (desktop dyno says 440) as well, and have all of the stock cooling parts such as the radiator and water pump. But you must consider that the earlier Ford blocks were a lot thicker, so you can get away with more bore. As far as H beams, waayy overkill. I am running forged I beams in mine and they are great. Im not too sure about a stock crank being stronger than the stock block, but an Eagle or Scat crank definitely is. I run speed pro coated pistons, and they work great for me; they are light, strong, and are good for a 150 shot of nitrous. If you don't have a lot of money to spend, but you want a good, lightweight piston, I would recommend those. I like my combo a lot: Eagle lightened cast steel stroker crank, Forged I beam rods, and Speed pro pistons. Everything is very lightweight and spins up quite nicely. We really need to know more about your goals for this engine other than: I got some H beams; me and bubba gonna throw em this .060 over block with some pistons I got from slimey down the road over yonder. We gonna see if that sum bich will hold up to some power. Not saying you're redneck lol, just kinda exaggerating. But yeah, we need more info about what you are going to be doing with this thing, how much boost or N20 its getting, what heads ect.

 

The problem with .060 over isn't necessarily heat, it's throughwall cooling system leaks into the cylinder. A turbo setup runs higher cylinder pressures on smaller engines than a large n/a engine. Those pressures can cause the wall to fail and develop pinhole leaks or larger. It's hard to know without either running it or sonic testing it.

And a stock 302 crank is stronger than a stock 302 block. I've heard of plenty of 302 blocks failing under high power, but not the cranks. The cranks don't fail unless there's a serious imbalance issue. They're strong, light and cheap.

Forged pistons though are really a must for a turbo build. Smaller engines running boost generate more cylinder pressure and temperature. Good forged pistons will stand up to that, many cast pistons will not.

 

I am looking at putting aluminum heads on. the block is out of a 65. hard to say if it is stock or not since the car was supposed to have a 4 barrel carb and had a 2 when I bought it. I am not trying to go too radical. If I got around 400 HP I would be very happy but am not expecting it to be that high. As for the heads I don't know what to get yet. I am undecided as to whether I will go with a carb or EFI. I was just asking what the hyper pistons were. I was looking at summit and they claimed to be good pistons but I have never heard of them.

 

good for street power no forced induction or nitrous

 

You can run hypers if you are only going to run mild boost. Under 9psi. you have to know what HP you are trying to achieve.
are you going for over 400hp? if so forged for sure.
I am in the high 300s with mine. i am going to run a 50 shot of nos.

It all depends on how many ponys you want.