forged crankshaft

[Chadroper]

does anyone make a forged crankshaft for the A20A3 engine. Arn't ours cast.

[Chadroper]

the perfect engine would be a closed stainless steel block, stainless steel valves, rods, and head, titanium pistons, stainless steel valvetrain parts

[AccordEpicenter]

our crankshafts are forged man

[Justin86]

but they are not billet.

[Oldblueaccord]

the perfect engine would be a closed stainless steel block, stainless steel valves, rods, and head, titanium pistons, stainless steel valvetrain parts

SS block lol uh no.

Better do a little research on your metals bub your way off on all of these.


wp

[AccordEpicenter]

SS block lol uh no.

Better do a little research on your metals bub your way off on all of these.


wp

[mykwikcoupe]

billet is the way to go but ubercostly. I was looking at one for my tbird to do a 4.2l stroker out of a 3.8l supercoupe. the billet crank was about a grand.

[Neuspeed87lx]

i paid a 1000 bucks for the crankshaft in my civic ... isnt the stock crank in the a20s stong enough for most applications ?

[AccordEpicenter]

the entire bottom end should be good to 400+ hp with forged pistons (Thats it, really) as long as you stick to the stock rev limit. If you exceed 7krpm alot youre gonna need rod bolts and maybe stronger rods, it depends.

[Justin86]

oh yea you don't see to many people breaking honda cranks, better chance of putting a rod through the block.

[Chadroper]

I thought our rods, pistions, and crankshaft were cast.

[SteveDX89]

i paid a 1000 bucks for the crankshaft in my civic ... isnt the stock crank in the a20s stong enough for most applications ?

Is it made of gold or something? Just about all Honda cranks are forged. You got shafted on that crank.

I thought our rods, pistions, and crankshaft were cast.

The pistons and rods are cast. The crank is forged.

[Chadroper]

dont all B series engines have billit crankshaft, forged rods and pistons, far sturdier than ours

[Chadroper]

i know it takes more force to pull a B series rod in half than ours. Also if you clamped onto the base of a b series block and tried to crush it, it takes more force to crush a b series block than an a series

[SteveDX89]

B series have cast pistons and rods. They also have forged cranks. An all aluminum block is not as strong as a cast iron block so I think a B series block would crush easier. But who goes around crushing blocks?

[Chadroper]

even thought ours are cast iron and iron is almost twice as strong as aluminum (per cubic inch) the B series block uses more cubic inches of aluminum so it is actually stronger

[Chadroper]

an aluminum block that is twice as thick as a cast iron block is stronger aluminum is stronger for its weight than iron. aluminum is 1/3 as heavy and about 5/8 as strong as iron. So if the aluminum block weighs 80% as much its far stronger.

[rjudgey]

the Crank and rods are both forged, i've raced with stock rods are are safe upto 8K you can get them shot peened and polished to add a little extra safety and also use new Honda rod bolts or get ARP ones and mod the rod to fit. The pistons are the week link they tend to only last 15-20K at 8K rpm.

[Chadroper]

our rods are cast you dont know what you are talking about. if you cut one in half you can see the metal grains

to make our rods they have a sand mold of a rod and pour in liquid metal. then after it cools they cut it in half and machine the part for the crankshaft end and wrist pin end, then they make the holes for the bolts

[SteveDX89]

an aluminum block that is twice as thick as a cast iron block is stronger aluminum is stronger for its weight than iron. aluminum is 1/3 as heavy and about 5/8 as strong as iron. So if the aluminum block weighs 80% as much its far stronger.

B series blocks are open deck so you have a huge void around the cylinder sleeves. Therefore the aluminum is not thicker in this case. I don't know the properties, etc. of metals but last time I checked iron is a stronger metal. Why would people who turbo B series get their blocks re-sleeved with cast iron sleeves if the original aluminum sleeves are stronger.

[Chadroper]

because the sleeves are thin, if it was a closed deck block it would be sturdier, the crankshaft part is sturdier than ours, cast iron is brittle and will break, aluminum will flex before it breaks

[rjudgey]

i don't know what i'm talking about?
Howmany 200bhp N/A Honda engines have you built then!!
Well i have had no reason to cut one in half, and from cast rods i've seen the Honda ones are ten times better quality, if it were cast i would have broken one by now!! I've had other engine builders tell me that thay aren't cast so i suppose they don't know what their talking about either!!! They may not be forged but their definately not plain cast.

[SteveDX89]

because the sleeves are thin, if it was a closed deck block it would be sturdier, the crankshaft part is sturdier than ours, cast iron is brittle and will break, aluminum will flex before it breaks

When the block is resleeved they use sleeves that are the same thickness as the alum. ones. They even use thinner ones for people who want a larger bore.

[system-f]

aluminum will flex before it breaks

far from true. I believe most manufacures use a lost foam casting method to cast aluminum engine blocks ( Honda started a lost foam plant in Morikawa, 1985) regardless the blocks are cast aluminum. Cast aluminum does give a little teeny tiny bit more than cast iron, but it is still VERY VERY brittle and has no problem cracking.

[Chadroper]

everyone i know with a b series engine says the block is strudier than ours

there is a reason they dont make a cast iron b series engine