OMC 3 Cyl expansion Chambers

[John (Taylor) Gabrowski]

David M:

Concerning your previous post and I think that you would agree is that most people here that have had some exposure to expansion chamber systems, pipes and formulas go way beyond the simple thinking that you could put anyone's 3 Holer pipe from any other brand or type or modified version and that pipe from some simliar displacement engine would even begin to work if at all. Pipe formulas are based on precise engine specs that the manufacturer of builder would know or would provide as one relevant start point and from there it is test to fine tune the pipe. The ghist was that there is the technology out there that shows that a single expansion chamber matched to a 3 holer can work well and not be a great weight that could be constantly breaking and needing repair compared to some triple bunch of heavier or vibrating a pipe system that would.

That is all I was ever trying to get across.

[johnsonracer]

I have a mate that is a good fabricator so he will be making me a set of pipes. Been reading a bit about the chmabers now and the different formulas to use to custom make pipes to suit my engine.

From N.Z

[formeone]

luv my pulse tuned exhaust i build,,, can deff feel pull and set record with it,,,goooo figg,,hehe

[johnsonracer]

What sort of motor did you build pipes for?

[BRIAN HENDRICK]

luv my pulse tuned exhaust i build,,, can deff feel pull and set record with it,,,goooo figg,,hehe

Cheyney, that 45deg elbow from the '59 Oldsmobile 98 will be hard to find these days

[formeone]

motor was just a form-e/850 legal motor... dennis westby used it also to set nbra comp record as well... remember might make more top end horsepower ,,, but will only have a very narrow power band,,, just like mickel lopez had to run small wheels especially with his overdrive,,, my props about 9 inches in dia.... and way up on pitches,,, the time and money spent building something like that ,,, youd prob go faster buying new props and a tach,,,, just my opinion as i am thrifty also,,,,,,hehe... haaa as for a 59 olds hec that part expensive,, me cheep went to schucks 3$ for u bend,, works great,,, if ya know where to cut it,,,hehe

[johnsonracer]

whats the fastest anyone has hone up where you guys are with a 3 cyl.
Is there different records for hydros and tunnels?

[Mark75H]

formeone (Cheney) has gone the fastest, 104+ with a hydro

Yes, there are different classes that ran tunnels with triples in circle racing, but I think that class's top record was actually set with a hydro too, at about the same speed.

[Popa Sam]

I thought Jimbo set the Kilo with a mod 50 tunnel at 112-115 range. I have it somewhere will have to look and see.

[Mark75H]

I think you have the right brand, but are off on the driver and speed, if I recall