c_espitia

Im wanting to put a spreadsheet of all the things I will be needing for the engine build but 1 ? is stopping me. Im not sure what all the numbers mean when looking at cranks pistons blocks etc.... can anyone explain or give refrences to read

H0SS302

They are measurements... If you dont understand what they mean you need to read about the motor parts and what changing those part measurements does to the mechanics of the motor. I suggest you buy a book on rebuilding motors or something.

ddmsgtr1

If you don't understand what these measurements mean than I advise you to talk to a professional and/or buy a full rotating assembly.

H0SS302

ahh bs. you dont learn anything by running to someone else. Buy a book and learn something.

ddmsgtr1

Hey, it just simplifies the process, especially if you're not sure of what you're doing. I'd love to build my own shortblock or longblock. But you don't wanna start putting pieces together to realize that you bought the wrong length rods for the crankshaft that you're using, or having a set of pistons that are giving you too high of a compression ratio for you application, because you dove into something that you didn't fully understand.

c_espitia

so if I have the block and I buy a rotating assembly (forged) then what kind do i get and what other stuff is there to worry about

0cc Flat Top Pistons?
10cc/11cc Dished Pistons?
17cc/18cc Dished Pistons?
also what if im stroking it to a 302?

code3GT

AGAIN, what are your goals, budget and plan?

c_espitia

well I dont really have a budget cause I will be building over time but lets be real and not take things out of hand Im not sure what it will cost for the build up. I plan on forging the bottom end and maybe stroking it, some blower cams with a nice idle, eventually a blower maybe kenne bell opinions please? O and a nice set of heads. any comments are appreciated. goals would be around 400-500+ RWHP street beast!

ddmsgtr1

The dish of the piston along with the chamber of your heads, possibly a few other factors as well are going to determine your compression ratio. If you plan on going FI you probably want to be somewhere around 8.5:1, I believe. For an NA build you'd probably pick a setup that would put you at 10:1, maybe 12:1 or higher depending on what range you're shooting for and what grade fuel you plan on using. As far as a stroker, I wouldn't waste the money. The opinion I've heard is that you're better off boring it out .020 or .030 than putting in a stroker crank. I would definitely have the block blueprinted by a good machine shop. Again, these type of questions are why I recommend consulting a professional, or even just a buddy that has done this type of work before.

Mustang_NTriangle

^^^ not true you don't want 8.5:1 compression ratio if you are a centri. You would want 9.0 or 9.5 otherwise you will lose serious power especially down low unless your go with a KB.

I am running MMR 800 short block with 18 dished piston with stock heads compression ratio of 9.5 which is stock @ 15 psi. You need to determine your end goal or plan with your car to determine which dish piston you want and if you plan on going with aftermarket heads. If your goal is only 500 rwhp then you don't need heads just a nice set of blower cams, springs, and retainers. If you go money to blow then buy the heads as well rather than doing cams and paying for the install then down the road whiching heads.

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