Notched connecting rods on a B230

[OVERDRIVE]

My B230F slaps. I'm a bit tired of it so I've been thinking of a way to fix it for good. In some niches of engine building, adding notches to the big end of a connecting rod to help sling oil up and onto the cylinder walls and piston is common practice. Volkswagen even had a TSB for the type 4 motor to do this. My question is, has anyone tried employing this on non-squirter B230 engine? I think it may be beneficial, as it might get more oil onto the cylinders where the maximum piston to wall force would be. B230's don't seem to develop piston slap from piston heat only, otherwise you'd see non intercooled B21FT's making a racket. From my minimal experience digging deep inside a red block it sounds like the skirt and rod design.

 

[740atl]

Omg why would you install a giant crack in an already weak connecting rod?

Piston slap is a feature of redblock engines , not a bug.

 

[OVERDRIVE]

Omg why would you install a giant crack in an already weak connecting rod?

Piston slap is a feature of redblock engines , not a bug.

It won't crack if done right, and the engine shouldn't slap, it's worn. That doesn't mean it will fail, but it is a design shortcoming.

Hurricane I-profile rods Volvo B230 152mm

Hurricane Motorsport I-profile connecting rods Volvo B230 These connecting rods have their guide on the crankshaft Hurricane Motorsport I-profile connecting rods can handle more than 200HP per cylinder. Comes weighed with a maximum of 1g in weight difference per batch. All connecting rods are...

www.speedingparts.com

These rods already have the notches.

 

[Radtap]

On small engines the connecting rods have a hook on the cap to specifically sling oil up into the cylinder bore. Billet versions received a channel in that hook to also feed the rod bearing oil cause there's no oil pump in those engines.

 

[mrjaybeeze]

Hi
I can't imagine this will help at all, my OEM squirter block slaps as an old diesel when cold but in 30 sec it is all gone. I bet the squirters put a whole lot more oil up there than that tiny slot will do...

Regards Jaybee

 

[linuxman51]

It won't crack if done right, and the engine shouldn't slap, it's worn. That doesn't mean it will fail, but it is a design shortcoming.

Hurricane I-profile rods Volvo B230 152mm

Hurricane Motorsport I-profile connecting rods Volvo B230 These connecting rods have their guide on the crankshaft Hurricane Motorsport I-profile connecting rods can handle more than 200HP per cylinder. Comes weighed with a maximum of 1g in weight difference per batch. All connecting rods are...

www.speedingparts.com

These rods already have the notches.

interesting site.

 

[esmth]

lol the stock b230 rod side clearance is already hotdog down a hallway.

 

[linuxman51]

the good aftermarket rods are crank-steered, so you could do it that way.

 

[mikep]

On small engines the connecting rods have a hook on the cap to specifically sling oil up into the cylinder bore. Billet versions received a channel in that hook to also feed the rod bearing oil cause there's no oil pump in those engines.

Almost all early car engines had a scoop for the rods, then some had added squirters directed at that scoop.

"Riding The Film" (1937 Chevrolet oil video)

 

[dl242gt]

Never had a B21 that had piston slap like a B230 does. The worst one I've had was an 86. Although strangely it's also the engine that got the best mileage. The slap would only manifest on cold starting like usual.