Bowtie Cranks - Need Info (different types?)

[MadPSI]

Ok, so I recently picked up a pair of bowtie blocks, and now I'm shopping for all the other parts. I am finding a lot of people that are selling "Bowtie Odd-Fire cranks". Will any one do, or are there different types of odd-fire cranks out there. I know the obvious forged vs. billet, but I'm wondering if there are different configurations that could cause issues...

Also, what kind of price should I offer for one?

 

[ghettosled]

Re: Bowtie Cranks - Need Info (different types?)

i have 2 Moldex billet evenfire cranks in stock if you are interested. i ordered them in December and just got them. 8 months later.

For oddfire, look for a name brand, 2.100" rod, std main bearing and a minimum of 3.4 stroke.

 

[syclone383]

Re: Bowtie Cranks - Need Info (different types?)

i have 2 Moldex billet evenfire cranks in stock if you are interested. i ordered them in December and just got them. 8 months later.

Mike,

Whats the stroke on these?

Thanks,
Mike

 

[MadPSI]

Re: Bowtie Cranks - Need Info (different types?)

The one's I'm looking at are out of an ASA motors. Do they have a stamping on them or something that might tell more about them if the guy I'm buying them from doesn't know the specs?

 

[Windedv6]

Re: Bowtie Cranks - Need Info (different types?)

The one's I'm looking at are out of an ASA motors. Do they have a stamping on them or something that might tell more about them if the guy I'm buying them from doesn't know the specs?

Are you looking for an odd-fire or even-fire crank?

John

 

[ghettosled]

Re: Bowtie Cranks - Need Info (different types?)

Mike, the cranks are 3.75" with 2.100 journals. The stock stroke ones were already reserved for several VERY patient customers.

As for the ASA stuff most was 3.4 stroke with a 4.125 bore, but the stroke can usually be found stamped on the front counterweight.

 

[MadPSI]

Re: Bowtie Cranks - Need Info (different types?)

Are you looking for an odd-fire or even-fire crank?

John

Odd-fire. The guy I'm talking to has several ASA cranks, and I'd like to buy a spare or two if the price is right. It's a long-distance purchase, so I'm just trying to make sure they're usable before I have them all freighted to my house.

So asking this guy for the stroke stamped on the weight, measuring the bore, and measuring the rod journal would give me a good idea, right?

 

[Windedv6]

Re: Bowtie Cranks - Need Info (different types?)

Odd-fire. The guy I'm talking to has several ASA cranks, and I'd like to buy a spare or two if the price is right. It's a long-distance purchase, so I'm just trying to make sure they're usable before I have them all freighted to my house.

So asking this guy for the stroke stamped on the weight, measuring the bore, and measuring the rod journal would give me a good idea, right?

You don't need the cylinder bore if that's what you are asking. The crank and rod journals are what you want. Most odd-fire cranks are for 2 piece seals, but there are some one piece seal cranks also. Some blocks will not take a one piece seal crank. Also some of the cranks are lightened beyond what you may want. Our rods and pistons are normally heaviler than what the circle track guys use and can make balancing a light weight crank expensive because of needing to add weight back to the crank.

Why are you doing an odd-fire?

John

 

[MadPSI]

Re: Bowtie Cranks - Need Info (different types?)

By bore I meant crank journal... My bad.

The only reason I'm was doing odd-fire is that I thought it was a stronger setup.

 

[fivetodrive]

Re: Bowtie Cranks - Need Info (different types?)

It is stronger but the cost to control one is higher since motec is the only ecm that is proven to run one. Unless you go carb'd like silly...

 

[Windedv6]

Re: Bowtie Cranks - Need Info (different types?)

By bore I meant crank journal... My bad.

The only reason I'm was doing odd-fire is that I thought it was a stronger setup.

It will cost you in the end with tuning equipt and drivability. We don't have a problem breaking billet evenfire cranks. Mrsyclone just went 8.8s and 160 mph doing 7,500 rpm using a stock stroke billet crank. In theory a 3.48 stroke is probably stronger than a 3.75 stroker if you are pushing the rpms.

There are those that have odd-fire setups that wish they had even-fire.

Don't get me wrong. I want you to build whatever you want. We all get to choose our course because we own our own trucks. I just want you to think about it and do some checking around. It make give you some ideas on your direction.

John

 

[Syborg Twin Turbo]

Re: Bowtie Cranks - Need Info (different types?)

just a quick update - big stuff 3 is odd-fire compatable

 

[MadPSI]

Re: Bowtie Cranks - Need Info (different types?)

Does FAST XFI do odd-fire? That's what I was planning on using for this application...

I didn't realize that you guys were using billet even-fire stuff. I thought that those cranks would be a lot harder to get a hold of. I'd gladly go even-fire if that's the case.

I'm just looking for a stout bottom end that will compliment the block and give me the peace of mind to run 700-800 HP and not push the motor to the breaking point.

 

[Windedv6]

Re: Bowtie Cranks - Need Info (different types?)

Does FAST XFI do odd-fire? That's what I was planning on using for this application...

I didn't realize that you guys were using billet even-fire stuff. I thought that those cranks would be a lot harder to get a hold of. I'd gladly go even-fire if that's the case.

I'm just looking for a stout bottom end that will compliment the block and give me the peace of mind to run 700-800 HP and not push the motor to the breaking point.

Call Mike Lee. He has couple billet cranks for sale.

John

 

[ghettosled]

Re: Bowtie Cranks - Need Info (different types?)

It is stronger but the cost to control one is higher since motec is the only ecm that is proven to run one. Unless you go carb'd like silly...

actually DFI, FAST, Big Stuff, Electromotive and Motec amongst others have all proven to run an oddfire engine. The Big Stuff for the oddfire (which isnt even released yet) is the same as the old FAST.. Nothing new there, just nice you can also control a 4l80e trans from the same unit. Not the best option, but it does work and i had it on my first oddfire (666rwhp motor).

There's no doubt the setup is "odd" and a hell of a lot more confusing then an evenfire, but it is stronger when trying to make upwards of 900hp. The biggest mistake people make is thinking they are going to build a budget bowtie motor with an oddfire crank, b/c they bought a complete engine for $2500. There is nothing budget about building a 800hp V6 whether it is evenfire or oddfire.

 

[BetMinesFaster]

Re: Bowtie Cranks - Need Info (different types?)

It will cost you in the end with tuning equipt and drivability. We don't have a problem breaking billet evenfire cranks. Mrsyclone just went 8.8s and 160 mph doing 7,500 rpm using a stock stroke billet crank. In theory a 3.48 stroke is probably stronger than a 3.75 stroker if you are pushing the rpms.

There are those that have odd-fire setups that wish they had even-fire.

Don't get me wrong. I want you to build whatever you want. We all get to choose our course because we own our own trucks. I just want you to think about it and do some checking around. It make give you some ideas on your direction.

John

What kind of power is safe to achive with a billet evenfire 3.48 crank and 18* heads? I was considering oddfire as well because of the fear of weak evenfire cranks. I just scrapped my 3.8 buick engine to build a 4.3 turbo for my GN because of the whimpy 3.8 bottom ends. Sorry ti hijack, just interested in what is being said!

 

[Windedv6]

Re: Bowtie Cranks - Need Info (different types?)

What kind of power is safe to achive with a billet evenfire 3.48 crank and 18* heads? I was considering oddfire as well because of the fear of weak evenfire cranks. I just scrapped my 3.8 buick engine to build a 4.3 turbo for my GN because of the whimpy 3.8 bottom ends. Sorry ti hijack, just interested in what is being said!

Robert in Sweden ran 8.XX with his full weight sy with an even fire crank. He has to be pushing 1,100 plus hp. Ed Hess isn't far behind in the low 9s. I run even fire cranks in both of mine Ty's. I have yet to see an even fire billet crank break. I am sure it can be like anything else at some point.

John

 

[blk00z28]

Re: Bowtie Cranks - Need Info (different types?)

Let me get this straight, you tossed your 3.8 for a 4.3?

You might want to reconsider building your 3.8 again. Because if you had problems with it the first tme you either built it wrong or the person you had build it did it wrong. I've helped build a few 3.8 motors and one that made over 750rwhp on a low boost setup. And that's on a stock 109 block with a girdle. I think you might even get away with building a stage 2 motor cheaper then a bowtie 4.3.