what`s the deal?

**Fast Fred** · 02-16-2007

Detroit Whitey

Fred im frozen and sick of it thinkin about going to the romp in the swamp zoller side i could run his fat boy boat seein he`s around and i mean round 380lbs

ya frozen hear too, No i'm not ketchin that one in Fl., guna wait, Berg will let me know how it goes, at one time thay was makin up new rules or some thing, sayin that i had to weigh in my hull, (not happenin) and some other stuff, i sent a hull down thare two seasons ago to run that race, then thay started with that stuff,
so i did not go, cost about a G to send that hull down,

seems thay got a fue happenin down thare see what the word is and i'll go from thare.

**calvin** · 02-17-2007

I have a few of the omc 3-holers that I am taking apart to make one...How can you tell which crank is cast and which is forged?

**Mark75H** · 02-17-2007

Forgings are usually smooth on all surfaces, almost as if they were machined regardless of color. Castings are rougher, not quite as pretty.

If you are not sure you can bring them by and I will look at them for you.

**wolfgang** · 02-23-2007

following exhaust discussion with great interest, as I am pondering building special tower for my Chrysler/Force 4-cylinder. I think tower volume and lengths of tuner pipes (inside tower) are crucial here. For an in-depth study I recommend Alexander Graham Bell`s (I think it ia a collective of Australian tuners) "Two Stroke Performance Tuning" by Haynes Publishing, second edition ISBN 1 85960 619 9. If somebody has experimented with tower housing volumes, please let us know.

**Mark75H** · 02-24-2007

On an inline 4 the important thing is to divide the 4 into 2 pairs; there is some advantage in having the pairs together for some length and a favorable volume ... but it is a lot of work for minimal power increase on a system restricted to internal plumbing

I have read Bell's book as well as Jennings' book and another by an Italian

**wolfgang** · 02-25-2007

thanks, Sam. I am well aware of that. I was actually hoping (fishing) someone within the forum might come up with some research-based recommendations. I am sure the manufacturers have done work in this regard - i.e. optimise tower housing material/fabrication input vs. performance improvements/aesthetics.

**Detroit Whitey** · 03-02-2007

Had a pile of 3cly cranks and some how i got stuck with a 65hp crank wich uses point so to any of you guys bulidin omc 3 cly`s look out for those dam thing`s they have the cam lobe bulit right on the crank.Hek! i even knew this and it still got me.

**RichardKCMo** · 03-02-2007

Is this not good ? Is it because of flywheel weight , or something else?
RichardKCMo

Tomtall · 03-02-2007

Richard - The crank that has the points lob built into the crank cannot run a inductive ignition pick-up under the flywheel. The Inductive pick-up crank has a recieving slot in it to accept the slip on timming ring used on the inductive ignition.