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onehappykombi
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Joined: March 26, 2017
Posts: 150
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 Posted: Thu Apr 14, 2022 4:41 pm Post subject: Re: 2022 Junkyard engine build project - 1679 or 1800 ? |
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| Jason37 wrote: |
I would suggest going to the 1800, there is little difference in price if you use the stock rods and barrel shims. I only had to clearance the piston skirts on my build because I was using the short rods. I am using the in/out pump from CB on my build as well. Some things to consider with your build regardless of the displacement you select:
- read up on center sections and ends as some aftermarket flow more than others.
- cam choice, I went CB 2232 with mine, others like the 2280.
- get everything dynamically balanced.
- you can buy a tool that will allow you to drill your flywheel for 8 dowels. https://www.cbperformance.com/product-p/6548.htm
- you didn’t mention what heads you currently plan to run. I would suggest saving up and doing the heads now - maybe reach out to https://www.performanceworkshop.net/cylinder-heads to get a price on a built set of stock valve sized heads. |
Thank you for all the info!
With stock rods I wouldn’t have to shave the piston skirts?
Center sections and ends of what? Sorry I didn’t understand
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'56 Early Split & '69 Early Bay
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onehappykombi
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onehappykombi
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| Posted: Tue May 24, 2022 11:06 am Post subject: Re: 2022 Junkyard engine build project - 1679 or 1800 ? |
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Update from the shop (finally!):
Seems like I have to stick to 1600 or find a different case
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Matthew
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Joined: January 29, 2004
Posts: 1760
Location: Eastern Tennessee
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| Posted: Tue May 24, 2022 12:06 pm Post subject: Re: 2022 Junkyard engine build project - 1679 or 1800 ? |
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I don’t see any reason it can’t be fixed. Once repaired you can still use the 88’s that slip in at the base and require machined heads.
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Rome
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onehappykombi
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Joined: March 26, 2017
Posts: 150
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| Posted: Mon May 30, 2022 6:41 pm Post subject: Re: 2022 Junkyard engine build project - 1679 or 1800 ? |
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I’ve been trying to decide the target compression ratio but I read too many different opinions. A lot of people say the GB information is outdated.
Would you still recommend running compression ratio of 7:1 or even lower?
I plan to use 87 regular gas and want longevity, not racing
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'56 Early Split & '69 Early Bay
Overlanding the USA
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Lingwendil
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AlteWagen
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AlteWagen
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| Posted: Mon May 30, 2022 10:23 pm Post subject: Re: 2022 Junkyard engine build project - 1679 or 1800 ? |
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| onehappykombi wrote: |
I’ve been trying to decide the target compression ratio but I read too many different opinions. A lot of people say the GB information is outdated.
Would you still recommend running compression ratio of 7:1 or even lower?
I plan to use 87 regular gas and want longevity, not racing |
With the ethanol in todays fuel you can run MUCH more compression which equals better efficiency and power. With a W110 I have been running 9.5:1 for all these years (15 years +). The key is to KNOW YOUR TEMPS!!!!!! Even with a stock engine if you want it to last in a loaded down bus you need to know whats happening. Cylinder head and oil temp gauges are the bare minimum.
What is more important is matching the compression to the cam.
I once built a low compression 'bus' engine, it was a pig and had to have my foot in it all the time just to keep it going.
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onehappykombi
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| Posted: Mon Jul 04, 2022 6:26 pm Post subject: Re: 2022 Junkyard engine build project - 1679 or 1800 ? |
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UPDATE: Engine Case arrived from the shop!
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Dusty1
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Joined: April 16, 2004
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| Posted: Tue Jul 05, 2022 12:25 pm Post subject: Re: 2022 Junkyard engine build project - 1679 or 1800 ? |
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| onehappykombi wrote: |
Update!
Checking some stuff off the “tools and equipment” list
(pic shows Harbor Freight tap and die set) |
I often refer to that old Axl Rose chestnut,
"Not to be an asshole, but..."
Not to be an asshole but...
Friends don't let friends buy their machine tools from Harbor Freight. 
They're not durable. They're not accurate.
I work with an ancient metric tap and die set, an heirloom from my uncle Joe's motorcycle shop. Joe closed up shop and moved out west in 1960.
You only need a couple taps and maybe a die or two to start. I find an 8mm tap and an 8mm die takes care of most of what I need to do. 6mm takes care of the rest of the small holes.
I use an heirloom Starett tap wrench. USA made in Athol, Massachusetts, baby! 70- plus years old and counting. Buy quality and only cry once. 
| onehappykombi wrote: |
| UPDATE: Engine Case arrived from the shop |
The still reamed out cylinder stud hole is a bummer. The goal of re- machining a case is to end up with a usable case.
If a stock case saver won't fix it I would create a custom case saver.
However the existing hole is threaded, that's the thread for our custom case saver.
All of the cylinder studs should have inserts. I don't trust the threads once I've removed the studs. Neither did VW which is why later cases all come with inserts.
It's handy if you have a lathe that will cut metric thread assuming that hole is threaded metric. If it's SAE any old USA lathe can do the job.
A useful lathe trick is to cut a custom thread to fit tight.
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onehappykombi
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| Posted: Fri Jul 08, 2022 3:07 pm Post subject: Re: 2022 Junkyard engine build project - 1679 or 1800 ? |
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| Dusty1 wrote: |
.
The still reamed out cylinder stud hole is a bummer. The goal of re- machining a case is to end up with a usable case.
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Do you think this case is not usable? If so, why?
The man who did the machine work has been running a machine shop for decades
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onehappykombi
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| Posted: Wed Aug 03, 2022 7:16 am Post subject: Re: 2022 Junkyard engine build project - 1679 or 1800 ? |
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UPDATE:
Confirming I will go for 1679 mainly due to the oversized case saver that won’t allow opening the case bores. Also because it’s my first build and not dealing with adjustable push rods will make it simpler.
I’ve been trying to find a 1 3/8” header that will work with:
- Moustache bar
- Hitch receiver
- Full flow pump cover
- Better flow than stock muffler
- Under $600 (price of Vintage Speed)
- Heater boxes
Is this impossible??
Alternatively is it worse to run the “restrictive” stock exhaust or an “oversized” 1 1/2” sidewinder?
Thank you !
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Lingwendil
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Location: Antioch, California, a block from the hood
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onehappykombi
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| Posted: Wed Aug 03, 2022 7:49 am Post subject: Re: 2022 Junkyard engine build project - 1679 or 1800 ? |
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| Lingwendil wrote: |
| any pic of the repair to the oversized case saver hole? |
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Lingwendil
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onehappykombi
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| Posted: Wed Aug 03, 2022 7:56 am Post subject: Re: 2022 Junkyard engine build project - 1679 or 1800 ? |
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| Lingwendil wrote: |
| Did they turn a new insert or source one? |
I think he had old ones laying around and needed to find one.
Are you trying to do something similar?
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Lingwendil
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Brian_e
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| Posted: Wed Aug 03, 2022 9:16 am Post subject: Re: 2022 Junkyard engine build project - 1679 or 1800 ? |
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| onehappykombi wrote: |
| Lingwendil wrote: |
| any pic of the repair to the oversized case saver hole? |
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Isn't this picture of the deep stud on #3? The insert would be down in the bottom of that hole, and it will use one of the longest lower studs in that spot.
Take a couple pics of each whole case half with all the stud holes in the picture frame. Include a close up of anything the guy "repaired".
I don't know why you couldn't cut the case bore. It has been proven cutting into the case saver threads a little bit won't hurt anything.
Brian
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onehappykombi
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| Posted: Fri Aug 05, 2022 12:02 pm Post subject: Re: 2022 Junkyard engine build project - 1679 or 1800 ? |
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| Brian_e wrote: |
Take a couple pics of each whole case half with all the stud holes in the picture frame. Include a close up of anything the guy "repaired".
I don't know why you couldn't cut the case bore. It has been proven cutting into the case saver threads a little bit won't hurt anything.
Brian |
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