300 hp N/A carb 2.8 V6 engine

[3400-95-Modified]

I was going off your October post of ordering a new crank, Didn't know it went down earlier than that. Crower is a good name and take pride in their work... I'm sure if you were explicit on your requirements for the crank you will get what your expecting.

If you don't mind me asking, How much did they hit you for doing a fully custom billet crank?

FWIW here is a vid of a company making a Billet crank... pretty neat machining process and a crazy CNC machine.

[34blazer]

I would be more than elated if I saw a custom one off crank in less than a year for such a niche engine.

There's very few of us that look at these 60 degree V6s and think "performance", most people think "Economy engine" or "junk".

^This.

[Will'sFiero]

This story is to get a winning engine to a historic race car.
GM 2.8 V6 push rod engine in a 1974 Ford Capri.

-block 1996 3.1 (gen 3)FWD bore 89.25 , stroke 76 mm
-3400 aluminum heads (gen 3)

Are you in a displacement limited class? You'd make more power with the later 92 or even 94mm bores.

You have that backwards. Narrow LSA is (supposed to be) good for boosted engines to keep from bleeding off pressure. Wide LSA is good for higher compression N/A motors.

As has been mentioned, this is backwards. The greater overlap, typically associated with narrower LSA, gives problems with boosted engines... either allowing supercharged boost to blow straight through to the exhaust, or allowing exhaust back pressure to contaminate the charge (because back pressure is almost always higher than boost on turbo engines).

Yes, the integral of lift in over the overlap period measures overlap in degree-inches, so LSA is not a direct measurement of overlap.

For N/A engines, lower flowing ports and bigger cylinders tend to like more overlap because they need more exhaust energy in the intake tract to get good cylinder filling. Better ports and smaller cylinders like less overlap because they don't need the extra energy to fill the cylinders. Less overlap tends to result in a broader powerband.

[34blazer]

IIRC the OP stated he was in a limited displacement class, early on in the thread. Or maybe it was the last thread.

*Edit* Yeah, it was the first thread....

"Thanks for your answers .

The race regulations limits me to 2800 cc max.
Plan is to get something like 270-300 horsepower out of 2,8.
That needs a wild camshaft ( = roller lifters) , compression ratio 13:1 , strong short block,
good heads ( = big valves) and so on.....

We have here Chevrolet Cavaliers , Buick Centurys .... in jankyards , with a 2,8 V6-engines.
Can get one easy."

[Will'sFiero]

IIRC the OP stated he was in a limited displacement class, early on in the thread. Or maybe it was the last thread.

*Edit* Yeah, it was the first thread....

"Thanks for your answers .

The race regulations limits me to 2800 cc max.
Plan is to get something like 270-300 horsepower out of 2,8.
That needs a wild camshaft ( = roller lifters) , compression ratio 13:1 , strong short block,
good heads ( = big valves) and so on.....

We have here Chevrolet Cavaliers , Buick Centurys .... in jankyards , with a 2,8 V6-engines.
Can get one easy."

Ok, I hadn't seen that thread.
If he's getting a billet crank cut... he could go with a 67mm stroke (and 6"+ conrods) and a 94mm bore to keep it under 2800 cc's... That screamer would be easier to get to 300 HP than the 89x76 standard 2.8.

Of course I also understand that the bigger bore blocks may be more difficult to find on his side of the pond.

Edit: With a 99mm bore, a 60.6mm stroke will get 2800cc's

[veekuusi]

I was going off your October post of ordering a new crank, Didn't know it went down earlier than that. Crower is a good name and take pride in their work... I'm sure if you were explicit on your requirements for the crank you will get what your expecting.

If you don't mind me asking, How much did they hit you for doing a fully custom billet crank?

FWIW here is a vid of a company making a Billet crank... pretty neat machining process and a crazy CNC machine.

Crank is on the way to Finland. Thank you Crower.

$3300 was the price .
+ shipping to Finland $200
+ tax and duty here in Finland will be something like $500

Is that expensive or cheap?
Tell me.
But motorsport is never cheap, at least when you want to be the first.

[3400-95-Modified]

But motorsport is never cheap, at least when you want to be the first.

You got that right...

$3300 if that's US then that would be considered WAY more expensive than what most would even think of spending on this site... Hell I hope to build my whole engine for less than that right now Your looking at 4k for just the crank... I paid $200 for my whole engine.

[veekuusi]

"Your item is being held in US Customs for further inspection"
says the tracking number.

Hey C`mon.
It is no missile parts on the way to Ukraine.

[Will'sFiero]

Crank is on the way to Finland. Thank you Crower.

$3300 was the price .
+ shipping to Finland $200
+ tax and duty here in Finland will be something like $500

Is that expensive or cheap?
Tell me.
But motorsport is never cheap, at least when you want to be the first.

$3300 is fair for a billet crank.
The V6/60 with the split throws has 10 journals to machine, while a V8 crank only has 9... So there's a bit more work in the 6 cylinder crank. It's shorter than a V8, so there's less raw material to begin with and less material to remove overall, which means less machine time than a V8 crank... But the engineering/programming cost for a low volume part is going to be a bigger chunk of the final price vs. a higher volume V8 crank.

[unchained01]

[QUOTE=veekuusi;473032]"Your item is being held in US Customs for further inspection"
says the tracking number.

Hey C`mon.
It is no missile parts on the way to Ukraine.[/QUOTE

LMAO !!!

I just hope that Motor is a missile for ya !!!

[veekuusi]

I got the billet crank today.
In one piece.
Looks fine to me.

[3400-95-Modified]

Totally looks like a missile, I can see why it was stuck in customs... LOL

Weird seeing no timing marks machined into the center ring.

[1988GTU]

I'd almost be tempted to put that piece in a glass cabinet for display. But with me, the power hungry appetite trumps beauty.

[3400-95-Modified]

Take a picture, it will last longer....... Well actually I hope the both last as long. LOL

[geoffinbc]

Wicked. I can't remember but did you send them an original cast crank to copy?