Bulletproof bottom end?

[4.3CPI]

Start with a stock block, add 4 bolt main caps, add a 2 piece rear seal adapter for a small block, use an early 80's Chevy odd fire 3.8 liter 229 crank, which shares the same stroke, add SBC rods, and an appropriate odd fire camshaft. :silly:

The benefits are;
Non splayed rod journals
Box stock 350 rods bolt on

The solid rod journal would surely take more power, right?

The adapter

 

[MRKING]

Re: Bulletproof bottom end?

Your putting a Chevy odd fire 3.8 liter 229 crank in a 4.3 v6 ?

 

[Windedv6]

Re: Bulletproof bottom end?

May have something here. Wonder if it's been tried before?

John

 

[92TYPHOON937]

Re: Bulletproof bottom end?

i dunno ne one else think of it or even try it ne where on ne thing??

 

[NecroWolf]

Re: Bulletproof bottom end?

but you'd need a oddfire control system

 

[syclone0209]

Re: Bulletproof bottom end?

is the cylinder spacing the same?

 

[ghettosled]

Re: Bulletproof bottom end?

Assuming you are talking 4.3 262 oddfire,

the shortblock will be cheaper, but the engine management to control it will be expensive and complicated. Thus the reason, all oddfire builds usually make in excess of 1000hp and are not budget minded.

 

[midnightbluS10]

Re: Bulletproof bottom end?

There's a bit of info here about that engine sharing the same bore size as a 350 so they could swap parts and be made on the same assembly line...that's as far as I read lol

http://www.gnttype.org/general/v6hist.html

 

[dgoodhue]

Re: Bulletproof bottom end?

There's a bit of info here about that engine sharing the same bore size as a 350 so they could swap parts and be made on the same assembly line...that's as far as I read lol

http://www.gnttype.org/general/v6hist.html

A Buick 231 V6 is different than a Chevy 229 V6.

 

[midnightbluS10]

Re: Bulletproof bottom end?

A Buick 231 V6 is different than a Chevy 229 V6.

lol...looks like I missed the Chevy part

 

[canadian]

Re: Bulletproof bottom end?

The benefits are;
Non splayed rod journals
Box stock 350 rods bolt on

The solid rod journal would surely take more power, right?

I think if you're at the power level where you're worried about breaking the crank, you've already upgraded all the parts in the motor. Unless you can find some sort of cheap way to control the odd-fire motor I'm not sure this would be cost effective.

 

[fahrfrumwurkin55]

Re: Bulletproof bottom end?

I've built 2 odd fire motors with 229 cranks, they aren't shared journal like the buick oddfire ones are.. they are still split journals like 4.3 cranks. They are stronger than a stock 4.3 crank, though, because they are made out of nodular iron and the rod journals have more overlap with each other so the area between rods is stronger. I have a setup that's pretty much exactly like the OP mentioned for sale right now in the classifieds. The only thing you have to use is the rear seal adapter, a 229 cam, and a 229 distributor. The big cam companies will take a 4.3 blank core and will grind you a 229 cam on it so that you could even make it a roller motor (229's were all flat tappett).

 

[fahrfrumwurkin55]

Re: Bulletproof bottom end?

yeah, it's like two inline three engines running together basically.. that's how you have to set up the trigger wheel if you inject them, and use two ems boxes each configured to run its own 3 cylinder engine.

 

[BetMinesFaster]

Re: Bulletproof bottom end?

229 is semi-odd fire". It's a sawed off 305, and it has 132 and 108 degree firing spacings. The crank has offset journals, but not as much as the 262, which uses it's own special connecting rods.

I read that there was a full odd fire 229 as well as a semi odd fire 229, ill dig up the info...