Header design and exhaust

[lyletrudell]

That's a simple way, loud pipes saves lives I like it!
Note he wrapped the pipes so he doesn't burn himself while working on it, funny.
Hey if the pipes pointed up we could install a flapper valve like diesels trucks have....
Dave, I don't want to chop up my heater box.
Plus the stock primary header pipes are too short and they are not equal in length.
I will see if I can find a Hawaiian header.
Lyle

--- In
2cylinderhondas@yahoogroups.com
, Jerry wrote:
> I saw those headers a few days ago, hilarious! Guess loud pipes save lives can also apply to microcars. I do like his car. Almost bought the same tires as him but figured I should use my brand new kumhos instead
> -----Original Message-----
> From: Dave Rulez
> Sent: Thursday, September 02, 2010 6:22 AM
> To:
2cylinderhondas@yahoogroups.com
> Subject: [2cylinderhondas] Re: Header design and exhaust
> For waht is worth guys, the heat exchanger is nothing but a couple thru pipes if you strip away all the outside, you could easily make a one piece header modeled after the existing set up, same basic dimensions and route wihtout the multiple joints and gaskets. Also have any of you seen this guys header?
http://www.japanesenostalgiccar.com/for ... c&start=60
> --- In
2cylinderhondas@yahoogroups.com
, "lyletrudell" wrote:
> > Just got back from the bike show. The cooler weather and no rain brought out a good crowd.
> > Lot's of cool bikes and good looking women in leather.
> > Sorry no pictures!
> > Gave a couple friends some info on the Honda 600 and they smiled and said they might be able to help get a couple extra HP.
> > Power to weight ratio was a big concern, they all agreed we need low end torque, 36hp moving 1300+ lbs is not good.
> > They both have computer race software for bike tuning, so they should be able to give us some useful numbers.
> > Hey it only cost a couple beers!
> > Lyle
> > --- In
2cylinderhondas@yahoogroups.com
, "lyletrudell" wrote:
> > > Designing a header is not easy, so tomorrow I will get
> [The entire original message is not included]

[feltonminicycle]

A Hawaiian header wont just bolt on unless you have the matching head. You will have to cut & reweld the parts that go in to the head. Hawaiians & Euro heads port out at an angle.
Miles

--- In
2cylinderhondas@yahoogroups.com
, "lyletrudell" wrote:
> That's a simple way, loud pipes saves lives I like it!
> Note he wrapped the pipes so he doesn't burn himself while working on it, funny.
> Hey if the pipes pointed up we could install a flapper valve like diesels trucks have....
> Dave, I don't want to chop up my heater box.
> Plus the stock primary header pipes are too short and they are not equal in length.
> I will see if I can find a Hawaiian header.
> Lyle
> --- In
2cylinderhondas@yahoogroups.com
, Jerry wrote:
> > I saw those headers a few days ago, hilarious! Guess loud pipes save lives can also apply to microcars. I do like his car. Almost bought the same tires as him but figured I should use my brand new kumhos instead
> > -----Original Message-----
> > From: Dave Rulez
> > Sent: Thursday, September 02, 2010 6:22 AM
> > To:
2cylinderhondas@yahoogroups.com
> > Subject: [2cylinderhondas] Re: Header design and exhaust
> > For waht is worth guys, the heat exchanger is nothing but a couple thru pipes if you strip away all the outside, you could easily make a one piece header modeled after the existing set up, same basic dimensions and route wihtout the multiple joints and gaskets. Also have any of you seen this guys header?
http://www.japanesenostalgiccar.com/for ... c&start=60
> > --- In
2cylinderhondas@yahoogroups.com
, "lyletrudell" wrote:
> > > Just got back from the bike show. The cooler weather and no rain brought out a good crowd.
> > > Lot's of cool bikes and good looking women in leather.
> > > Sorry no pictures!
> > > Gave a couple friends some info on the Honda 600 and they smiled and said they might be able to help get a couple extra HP.
> > > Power to weight ratio was a big concern, they all agreed we need low end torque, 36hp moving 1300+ lbs is not good.
> > > They both have computer race software for bike tuning, so they should be able to give us some useful numbers.
> > > Hey it only cost a couple beers!
> > > Lyle
> > > --- In
2cylinderhondas@yahoogroups.com
, "lyletrudell" wrote:
> > > > Designing a header is not easy, so tomorrow I will get
> > [The entire original message is not included]

[zinc2u]

Hi Miles,
    Does the combustion chamber of the Hawaiian head look different than the Mainland US head?  And did the Hawaiian engine have the same compression ratio as the mainland engine?
thx,
Dale

> A
> Hawaiian header wont just bolt on unless you have the matching head. You will > have to cut & reweld the parts that go in to the head. Hawaiians & > Euro heads port out at an angle.
> Miles

[friend]

ALL
    Folks, you all really need to get off the "Hawaiian" this and that kick.  Yes, the Honda 600's built for and delivered to (Sold) in Hawaii had the early (Before engine number 1017730) angle port head (Part numbers 12200-568-681, after had 12200-568-671 with an earlier part number 12200-568-680).   Along with other parts including the Y exhaust assembly are all listed in the parts manual.  The Carburetor went up to engine number 1018981, which included the engines made for the cars sold in Hawaii.  EPA got their hands in the mix and along came the later carb with a modification to the cam, and these other parts were removed from the parts books.  Moving all of the exhaust to the left side of the engine compartment had more to do with fumes from a leaking engine getting into the passenger compartment from the heat generated from the cylinders and head, than anything else.  The smell of heated oil is something most car guys dream of, but, not everyone.  So Honda moved to the exhaust style heater unit which was available for Germany, Denmark and Norway/Sweden/Finland/Switzerland countries in early cars. It modified the Y exhaust system but only used a single side (left) of the exhaust header.
Evidently not hot enough to make it cozy inside the cabin, both exhaust pipes were moved to the left side and the engine compartment including the smelly heated oil were closed off from the cars interior.  An electric fan was also mounted to the heater box and forced heated air was provided to the windshield and passenger cabin.
    So it is not the "Hawaiian" engine that provides the angle port exhaust, but many countries that imported the Honda 600 in its early years.  These areas should offer many more available parts, if your quest is to step back.
Bill

> -----Original Message-----
> From:
> 2cylinderhondas@yahoogroups.com [mailto:2cylinderhondas@yahoogroups.com] > On > Behalf Of > goinhm@...
> Sent:
> Friday, September 03, 2010 11:28
> PM
> To:
> 2cylinderhondas@yahoogroups.com
> Subject:
> Re:
> [2cylinderhondas] Re: Header design and exhaust
> Hi Miles,
>     Does the combustion chamber of the Hawaiian head look
> different than the Mainland US head?  And did the Hawaiian engine have > the same compression ratio as the mainland engine?
> thx,
> Dale
> > A
> > Hawaiian header wont just bolt on unless you have the matching head. You > > will have to cut & reweld the parts that go in to the head. Hawaiians > > & Euro heads port out at an angle.
> > Miles

[lyletrudell]

Come on Bill were having fun.
But you are right, the more I hear about the Hawaiian header the less I like it for my coupe, too much work to adapt it and I don't like the way it goes to the passenger side.
I think I will go the easy way and use the stock header pipe, and match it to the exhaust ports.
Eliminate the heat exchanger.
Then make a flange and 2 pipes that will give me an equal length that bolts to the stock header pipe flange.
A collector with a 1-1/2 ID and 1-1/2 OD exhaust, a front muffler and a resonator in the back, just using off the shelf parts.
This way I can use stock exhaust mounting points.
Also want it to be a bolt on/off mod and keep it cheap.
Thoughts?
Lyle

--- In
2cylinderhondas@yahoogroups.com
, "feltonminicycle" wrote:
> A Hawaiian header wont just bolt on unless you have the matching head. You will have to cut & reweld the parts that go in to the head. Hawaiians & Euro heads port out at an angle.
> Miles
> --- In
2cylinderhondas@yahoogroups.com
, "lyletrudell" wrote:
> > That's a simple way, loud pipes saves lives I like it!
> > Note he wrapped the pipes so he doesn't burn himself while working on it, funny.
> > Hey if the pipes pointed up we could install a flapper valve like diesels trucks have....
> > Dave, I don't want to chop up my heater box.
> > Plus the stock primary header pipes are too short and they are not equal in length.
> > I will see if I can find a Hawaiian header.
> > Lyle
> > --- In
2cylinderhondas@yahoogroups.com
, Jerry wrote:
> > > I saw those headers a few days ago, hilarious! Guess loud pipes save lives can also apply to microcars. I do like his car. Almost bought the same tires as him but figured I should use my brand new kumhos instead
> > > -----Original Message-----
> > > From: Dave Rulez
> > > Sent: Thursday, September 02, 2010 6:22 AM
> > > To:
2cylinderhondas@yahoogroups.com
> > > Subject: [2cylinderhondas] Re: Header design and exhaust
> > > For waht is worth guys, the heat exchanger is nothing but a couple thru pipes if you strip away all the outside, you could easily make a one piece header modeled after the existing set up, same basic dimensions and route wihtout the multiple joints and gaskets. Also have any of you seen this guys header?
http://www.japanesenostalgiccar.com/for ... c&start=60
> > > --- In
2cylinderhondas@yahoogroups.com
, "lyletrudell" wrote:
> > > > Just got back from the bike show. The cooler weather and no rain brought out a good crowd.
> > > > Lot's of cool bikes and good looking women in leather.
> > > > Sorry no pictures!
> > > > Gave a couple friends some info on the Honda 600 and they smiled and said they might be able to help get a couple extra HP.
> > > > Power to weight ratio was a big concern, they all agreed we need low end torque, 36hp moving 1300+ lbs is not good.
> > > > They both have computer race software for bike tuning, so they should be able to give us some useful numbers.
> > > > Hey it only cost a couple beers!
> > > > Lyle
> > > > --- In
2cylinderhondas@yahoogroups.com
, "lyletrudell" wrote:
> > > > > Designing a header is not easy, so tomorrow I will get
> > > [The entire original message is not included]