460 swap in my 79 Ford F150 4X4

[ErwinRommel]

Originally Posted by Crmzendrgone

257 sounds about right. As far as them not be able to balance the assembly or ratate it at their shop just means they don't have the equipment. Just curious do you know what they mean by 92-97CCs

Combustion chamber? Lol?

[hotrodpc]

Sounds to me they are talking about head chamber CC volume. That is actually quite small for a big block. Telling me, you might be at a nice compression ratio already. Depedning on the size of the dish in your pistons. If they are flat tops at that CC chamber, you are going to be fairly high compression I am thinking. What do your piston tops look like?

[ErwinRommel]

Originally Posted by hotrodpc

Sounds to me they are talking about head chamber CC volume. That is actually quite small for a big block. Telling me, you might be at a nice compression ratio already. Depedning on the size of the dish in your pistons. If they are flat tops at that CC chamber, you are going to be fairly high compression I am thinking. What do your piston tops look like?

well the old ones dipped down in the middle but I am going to get some flat tops.

Is this a problem?

[hotrodpc]

OK, so you have dish pistons. But how big. I'm telling you, be careful there. You get that ratio to high and you will not like results. You'll have plenty of power to make it around the block, then you'll have to park it to cool it down or it'll ping like nobody's biz. I think you better learn how to use a compression calculator. I'd go no higher than 9.0 to run pump gas, UNLESS you are going to go with a big cam with some valve overlap to reduce that compression some.

[ErwinRommel]

Originally Posted by hotrodpc

OK, so you have dish pistons. But how big. I'm telling you, be careful there. You get that ratio to high and you will not like results. You'll have plenty of power to make it around the block, then you'll have to park it to cool it down or it'll ping like nobody's biz. I think you better learn how to use a compression calculator. I'd go no higher than 9.0 to run pump gas, UNLESS you are going to go with a big cam with some valve overlap to reduce that compression some.

That Comp Cam Extreme 4x4 cam big enough?

valve overlap?

[hotrodpc]

Valve Overlap is when the cam is big enough, that as one valve in the cylinder is closoing, the other in the same cylinder is opening. This causes some compression to escape. So to compesate for that, you run a higher compression ratio, so its ACTUAL comp ratio is where you want to be for your pump gas to work ok. Its actaully quite important factors. I am thinking you got the idea of more is better. Sure, more is always better..... if you can find 98-101 octane gas.

[hotrodpc]

I think I can get 97 octane fuel here at our local race track. Its only $7 a gallon. And at 7-8mpg, it does not last long. At 60mph, you are using $1 every minute to drive that truck if its 7mpg. At $60 an hour to drive the truck, I sure couldn't be having fun in it. Point is, try to keep it able to run pump gas. Don't get to crazy on the comp ratio.

[ErwinRommel]

What kind of cam and lifters do you think I should get? I ain't going to get the who camshaft/lifter/valvetrain kit cause their doing a valve job on my heads anyways. I might just do cam and lifters, but what kit off of Summit do you think I should get? What cam bearing size too?

I think I am going to get DOME PISTONS.

[hotrodpc]

You are flat crazy to get dome pistons. You'll never find gas to run that motor, not to mention you said you had about $1000. You will spend probably $600 on pistons alone if you do that and they better be forged, and you better plan on $100-$125 to have them fly cut depending on what size cam you go with or your valves will be coliding with the pistons. Buying new pistons is not going to fit into that budget or did you mean spend $1000 on the pistons, bore and fly cut. Also keep in mind, this is not a small block Chevrolet you are building. Parts are not as plentiful, choices are much more limited, and certainly not as cheap. Back in my street race days, I like Iskendarian aka Isky, but now a days, I am thinking Comp Cams aka way back when was known as Competition Cams, put more technology into their cam grind cam specs and I have seen some nice grinds for the Olds 455 I want to buiild, and the Isky cams grind specs just don't seem to be as good in my opinion. Of course, that is going off the data I have researched by each manufacture. Just because the manufactuer says it, does not mean its true. What you INTEND to build the truck for, needs to be determined FIRST, then you need to determine how you are going to build this motor to get the truck where you want it to be. THEN, you can start talking about cam specs. There are cams for street driving, better mpg and/or lower emmisions, better torque for towing rock crawling, muddin, truck pull, circle track pavement raciing, circle track dirt racing, drag racing, nascar style racing etc etc. The cam grind does matter what you intend to use the vehicle for. So you need to decide that FIRST. It kinda sounds to me you are leaning into drag racing and building a trailered drag race truck at that. You might want to build you a truck to tow this one to the track first.

[ErwinRommel]

Daily driver and occasional mud bog, HotRod. A friend told me dome but then everyone says I am crazy if I got them. Lol.

Well I called the machine shop guys and asked what pistons would I need.
He said-
Pistons- 30 over (30 thousandths)
Rods- 20/20

I asked if the block needed to be decked or whatever and he said it is ok the way it is basically.

I am just going to go with flat top pistons

But what pistons will work for 30 over? These?Keith Black/KB Pistons KB137-030 - Keith Black Hypereutectic Pistons - Overview - SummitRacing.com

What about rods?

He said they are going to put new cam bearings in and they will be done with it within the next couple of days.