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Baja Forums -:- AzBaja.com Members -:- Projects and Builds -:- My 69 project
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My 69 project
Tell us about your Project, Were you at in tyour build. Post Pictures etc.
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The following users give thanks for this topic 51BUG50 - Mon Nov 07, 2016 10:23 AM
vwboat
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Post Post subject: My 69 project
Posted: Wed Aug 14, 2013 02:15 AM
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Dalton,

Just a thought on your Subaru engine. Coming home from FLAG yesterday in my 2008 Subaru outback I noticed the battery indicator come on in the dash. Then the brake indicator light came on. I think alternator gone out, belt gone;. Change lanes just in case and find that I have no power steering either. 5 miles from home, drop to surface streets. Engine running Ok, not heating up still have brakes so I keep going. More lights start popping up on dash, ABS/airbags/seat belts. 1 mile to go and the tach and speedo quit. Engine getting sluggish, no power, make it home and car quits and cannot shift from drive. Open hood and find belt for alternator/power steering shredded and fibers everywhere. Change power steering/alternator belt and the Air conditioner belt and all is well.

Carry a spare belt for the BAJA but had not thought about the Subaru, now have spares for it also.

VWBOAT(john)

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Dalton
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Post Post subject: My 69 project
Posted: Fri Aug 16, 2013 12:35 AM
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This is awesome info thanks John..

It sounds to me like when your battery light came on you neglected to turn off the air conditioning and ran the battery down.. Somewhere between 9v and 10 V the computer will drop down into limp home mode.. It was just letting you know it was time to find some place to stop.. Those are great ideas.. And yes I do carry spare belts, timing belt, replacement hoses, and even the belt that'll bypass the power steering and just run the alternator,, I also carry enough water to fill the radiator once.. Enough oil to fill the car once. Enough brake fluid to bleed the entire system once.. I even carry parts that don't even fit my car to help out others who ride with me..


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Dalton
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Post Post subject: My 69 project
Posted: Fri Aug 16, 2013 12:58 AM
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Mufflers 101:

I didn't realize that there were so many secrets in producing a muffler it was hard to find any information.. But this is what I think I know and please chime in and correct me if I am wrong..

The standard OEM muffler uses soft flexible sides to absorb and cancel out the exhaust noise of the motor by flexing every time it here's a boom.. The standard muffler is placed quite a ways away from the exhaust manifold allowing the exhaust temperatures to drop by several hundred degrees before entering the muffler this prevents the soft metal from getting overheated and becoming brittle that's why OEM mufflers fail their placed too close to the exhaust manifold which doesn't allow the exhaust gases to cool down before entering the muffler causing it to overheat..

Now when it comes to aftermarket mufflers it gets a little bit more hazy the body of the aftermarket muffler is usually hard and made out of 14gauge steel which won't flex and absorb the sound waves like an OEM muffler will so they employee a method of reflecting the sound waves back onto themselves which causes the sound waves to cancel each other out but they can only do this for a small range of frequencies.. So this is why different aftermarket mufflers produced different sounds...

I don't possess the technology or the time or the will to attempt this... SO..

I want to absorb the full range of sounds.... I'm going to probably build a muffler that has never existed in this configuration before for about six times the cost of just buying an OEM muffler and planning on replacing it every two years. At this point I just want to see if I can do it..

I want to send out a special thank you to the tech support guy that I talked to on the phone that told me "What you're trying to do doesn't exist and won't work" ....... I found inspiration in his words. ...

Photos to follow....


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Conundrum
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Post Post subject: My 69 project
Posted: Fri Aug 16, 2013 02:22 AM
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LOL, I just put on a cherry bomb and it's definitely the quietest thing I've run so far.

If you need a muffler that can stand up to extreme temps, you need a RX7 Muffler. The exhuast temps are so extreme they don't even call it an exhuast manifold, it's called a Thermal Reactor!!

I have a Huge OEM Cylindrical Muffler from a Dodge Pickup if you want to hack something out of it.


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Last edited by Conundrum on Fri Aug 16, 2013 02:23 AM; edited 1 times in total
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Dalton
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Post Post subject: My 69 project
Posted: Fri Aug 16, 2013 03:41 PM
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Success!!!! My creation works!! I have stealth mode without restricting the exhaust flow... In hindsight,,., It wasn't worth the money or the effort to make my creation work. my recommendation if you want stealth mode is to use an OEM muffler and just plan on changing it out when it fails.. They are only about 20 bucks in the store and you can probably get about two years out of them.

Something else that I've learned is that most gasoline motors, most of them require back pressure to function properly at low and high rpm..

So when choosing a muffler I would recommend finding one that is around the same size as the motor that you're running I think you'll be happy.. If you get one that's too large that flows too much you may be hurting yourself.. I had been if I this with "lean popping" this means that you don't have enough back pressure..

You need to look at the motor is a whole, if it was built for high rpm's than you need less back pressure. But if it is an OEM motor or close to it you need to have back pressure for to run properly. Especially if you're running a carburetor a factory computer can compensate only so much for the lack of back pressure but in the end the fix would be simple. You will notice on the glass pack that I'd drilled two 1 1/2" holes in the side of it. the stock exhaust system for a Subaru outback is 2 inches.. This is my chokepoint this will allow the motor to have back pressure without the exhaust system looking like it has a wimpy exhaust.. I borrowed this idea from Ricks Fab when he told me about an exhaust that he put together that normally would not work in that application but he place a chokepoint within the exhaust system to make the system flow properly.. That way he had the look that he was going for but the back pressure he needed so that the motor would run properly.

I am happy with the way that it turned out.. So now I'm back into the cab cleaning up my wiring mess.. Not sure if I'm in a get much done this weekend I think I want to spend it with my kids. But the cooler weather is coming fast and I can feel the pressure..

It will be rideing time soon.


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Dalton
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Post Post subject: My 69 project
Posted: Fri Aug 16, 2013 04:17 PM
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The old system...



The New system..??



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Dalton
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Post Post subject: My 69 project
Posted: Fri Aug 16, 2013 04:20 PM
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Dalton
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Post Post subject: My 69 project
Posted: Fri Aug 16, 2013 04:22 PM
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Glass packs...... they provide a full range of sound absorption..


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Dalton
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Post Post subject: My 69 project
Posted: Fri Aug 16, 2013 04:24 PM
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Dalton
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Post Post subject: My 69 project
Posted: Fri Aug 16, 2013 04:26 PM
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Dalton
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Post Post subject: My 69 project
Posted: Fri Aug 16, 2013 04:27 PM
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Done....



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Dalton
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Post Post subject: My 69 project
Posted: Fri Aug 16, 2013 04:29 PM
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this is the mock setup I am using until my radiator comes in...



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Dalton
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Post Post subject: Re: My 69 project
Posted: Fri Aug 16, 2013 04:58 PM
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wideopenmotorsports wrote:
I like the idea of a quiet motor. First, it is a nicer drive when you just cruise along and enjoy the scenery. Second, quieter means stealthier when out in areas you might not be aloud in.

Since this car isn't really setup to run fast in the desert, slipping by unnoticed is gonna be way easier than trying outrun the desert police. A dust trail is too easy to follow.

I "won't say" if I've ever been chased by the desert police.. But I can tell you that I found myself several times on the wrong side of a no trespassing sign with the locked gate standing between me and freedom. When I couldn't find a way out we went to the land owner and asked if he would please unlock his gate to set us free. We explained how we accidentally ended up on his private property and apologized for the trespass as he set us free..

I have been stop several times by the border patrol.. I believe to confirm citizenship and that we were hauling drugs.

If you have a chance... Look up the Devils Highway in Arizona it is some of the most pristine and beautiful desert I've ever seen... I've taken this route many times and have always been impressed with its beauty. But this areas of "no joke" area... It is very dangerous and should not be taken lightly.


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vwboat
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Post Post subject: My 69 project
Posted: Fri Aug 16, 2013 05:01 PM
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Dalton,

Good work and info of the muffler setup for you car. Looking good.

WBOAT(john)

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Conundrum
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Post Post subject: My 69 project
Posted: Fri Aug 16, 2013 05:07 PM
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Wow, that's a lot of effort! I'm glad it works for you!


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