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Old 01-03-2010, 01:06 AM   #51
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Re: Chevy 366 hop up

Hi
I am new to the site. I just bought a mini-pumper at auction with a 366. It turns over but does not start. I am hoping someone can tell me what types/brands of wires i can use to replace the wires that go from the distributor to the spark plugs...
also, general advice--it has been sitting for 2 years in New Mexico, where it is cold in the winter, and a lot of snow...any ideas about what is wrong, and how to get it running...i am trying to get it back to California, and basically burning money every day i stay here...anyway, as you can see i know almost nothing compared to the people on this site...but hope to learn more. thanks very much.
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Old 01-03-2010, 01:46 AM   #52
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Re: Chevy 366 hop up

Suck, squish, bang, blow...that's what an engine needs to do to run and in order to do those things it needs fuel, air, spark, and compression. You can start by checking any one of those, but you need to figure out what's missing.

First and foremost, if you can tell us if it has a carb or is fuel injected that would help tremendously. Furthermore, if it has a carb we need to know if it is gasoline or propane.

Ok, I'm going to assume a few things here.
1. It has a carb
2. It uses gasoline
3. It cranks over sufficiently but will not start.

The very first thing I would do is a tune-up. This need not be terribly expensive and it should be done whether the ignition system is at fault or not. I happen to really like ACDelco wires, but Taylor wires are also decent. NGK's are probably my favorite, but are only available for import cars. The same is true of the spark plugs. I'd run either ACDelco or NGK (who happen to make most ACDelco plugs now). Replace the distributer cap and rotor as well as points and condenser if you don't have an electronic ignition.

Normally I'd call the ignition system into question which is why I think you should do that tune up anyway. Check and make sure you have spark when you're all done. You might have a bad pickup or module. A $2.99 spark tester is your friend. Make sure you have spark at the plug end of the wires. If not, make sure you have spark coming out of the coil. Just work your way back. I'd be happy to hepl you if you get it tracked back to no spark that far back.

The thing has been sitting for a long time and gas goes bad. I wouldn't be surprised if you have a gummed up carb, plugged up filter, or gas that just plain won't kaboom anymore. You might not even be getting gas to the carb from the pump. I'd start by spraying just a little carb cleaner, brake cleaner, starting fluid, etc down the throat of the carb. See if it pops. If it does, try pouring just a little fresh gas down the throat of the carb and see if the prime is enough to make it take off. I really think you should get that nasty old fuel out of the tank and start with fresh. At the least, dilute it with fresh gas and put some additive like BG 44K or Seafoam in it to help clean things up.

Does it sound like it even has compression when you turn it over? When you're replacing the spark plugs I'd pour about a tablespoon of transmission fluid down each spark plug hole to help establish a good ring seal and free things up.
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Old 01-04-2010, 10:24 AM   #53
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Re: Chevy 366 hop up

I have a 366 in my bus and it will run all day long at 3200 to 3500 RPMs at 65 mph. When going up a hill it will drop 5 mph or so....I have installed new daul exhaust 2 1/2 to the back tires. New carb I went with a Q Jet.... I would make sure all is work on your engine before changing out stuff......
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Old 02-15-2010, 08:29 AM   #54
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Re: 366

Quote:
Originally Posted by westport_wayne
hoser, what is that 366 chev engine, a big block or a small block. its either a bored out small block or a industrial big block. my guess its a industrial big block. you could get a big block out of some earlier chev trucks or chevelles- cameros-ect. i had a old 78 chev 3/4 ton truck that had a 454 big block in it with headers and it had lots of power. if it is a big block, why wouldnt 454 parts fit on it ????? the older ones were 396-427 c.i. theres tons of parts for those things in JEGS and mags like that. that 366 might be just a detuned big block- i m not sure. some other gearheads on this site could probably tell you. just my 2 cents, john

There's more to it than that, but that's a good starting point. If you'd like to read up on heads a good starting point will be this site.
The 454 in my skoolie is I think out of about a 76 pickup or suburban. And yes the 366 is a industrial big block, with s#@ty heads and intake.

Go to Hastings and look at HOW TO HOT ROD BBC or any of the other BBC book's.
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Old 02-17-2010, 07:50 PM   #55
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Re: Chevy 366 hop up

B&M supercharger for big block Chevy for sale salehttp://asheville.craigslist.org/pts/1603164996.html
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Old 02-17-2010, 07:53 PM   #56
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Re: Chevy 366 hop up

try this http://asheville.craigslist.org/pts/1603164996.html
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Old 09-05-2011, 09:07 PM   #57
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Re: Chevy 366 hop up

You can get cams and other parts from jegs for the 366 AND 427 tall deck motors from online and most car quests can order bigger parts for them . People talk bad about them motors but I have one in my jimmy that I'm very happy with
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Old 05-05-2014, 04:41 PM   #58
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Re: Chevy 366 hop up

I just bought a 1987 Chevy Carpenter bus with a 366 in it. The former owner put dual exhaust on it to try and improve gas mileage and maybe power. I don't think it worked. On the 250 mile trip home it got about 5 mpg. That sucks! (pun intended). He suggested changing out the rear gearing to lower the rpms and get better gas mileage. However, I am wondering if this engine is just a gas hog or if both mileage and power can be improved? I have heard that it is a good engine as far as sturdiness goes.
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Old 05-06-2014, 05:53 PM   #59
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Re: Chevy 366 hop up

Quote:
Originally Posted by ElliottExpedition
I just bought a 1987 Chevy Carpenter bus with a 366 in it. The former owner put dual exhaust on it to try and improve gas mileage and maybe power. I don't think it worked. On the 250 mile trip home it got about 5 mpg. That sucks! (pun intended). He suggested changing out the rear gearing to lower the rpms and get better gas mileage. However, I am wondering if this engine is just a gas hog or if both mileage and power can be improved? I have heard that it is a good engine as far as sturdiness goes.
What elevation have you been running it at?

My bus with the 366 is long gone I switched out to a 22' class A RV with a 454 it gets 7.5mph towing my trailer loaded through the mountains and 10 mph on flat land and 1000' elevation and below.
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Old 05-06-2014, 06:16 PM   #60
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Re: Chevy 366 hop up

2 engines I was fond of, the 366 and the Ford 377. You like the 454 better than the 366?
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