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Farva_84
Samba Member
Joined: October 25, 2021
Posts: 43
Location: MO
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 Posted: Sat Oct 21, 2023 12:18 pm Post subject: The little H5 mystery build |
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| Hey everybody, so after 2yrs of driving through fields in an old rail at 4.3k rpms, I finally decided to pull my tin off and have a look. As soon as the intake manifolds came off, I noticed some scuffing on a valve guide…it’s floating. I pulled the head and made a shocking discovery. My little H5 is a 1835! I already knew it had case savers but had no idea what was in it. I measured the lift on the cam and got about .325 intake and .280 exhaust. Would this be a Stock cam? The heads are in rough shape and I just happen to have an old set of eepco big valve 40cc heads cut for 92’s laying around, so why not…no cracking behind cylinder 3 yet…according to my calc’s, with the current deck height measuring at 3.14 mm, I’m getting a CR of 8.5. Would this old beast run on 87 octane? Thanks |
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QRP
Samba Member
Joined: April 27, 2008
Posts: 1712
Location: NORTH HOLLYWOOD,CA
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| Posted: Sat Oct 21, 2023 9:32 pm Post subject: Re: The little H5 mystery build |
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| Farva_84 wrote: |
| Hey everybody, so after 2yrs of driving through fields in an old rail at 4.3k rpms, I finally decided to pull my tin off and have a look. As soon as the intake manifolds came off, I noticed some scuffing on a valve guide…it’s floating. I pulled the head and made a shocking discovery. My little H5 is a 1835! I already knew it had case savers but had no idea what was in it. I measured the lift on the cam and got about .325 intake and .280 exhaust. Would this be a Stock cam? The heads are in rough shape and I just happen to have an old set of eepco big valve 40cc heads cut for 92’s laying around, so why not…no cracking behind cylinder 3 yet…according to my calc’s, with the current deck height measuring at 3.14 mm, I’m getting a CR of 8.5. Would this old beast run on 87 octane? Thanks |
Oh man! Im in the process of putting together a 1914cc floor sweeper with eepco heads myself. .. LOL
Im no genius but I think 8.5 CR for a stock cam is pushing it for sure.
If a stock cam is what you have. just my opinion
Good luck on your build. |
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BFB
Samba Member
Joined: November 03, 2014
Posts: 1762
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| Posted: Sun Oct 22, 2023 7:41 am Post subject: Re: The little H5 mystery build |
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| Farva_84 wrote: |
| Hey everybody, so after 2yrs of driving through fields in an old rail at 4.3k rpms, I finally decided to pull my tin off and have a look. As soon as the intake manifolds came off, I noticed some scuffing on a valve guide…it’s floating. I pulled the head and made a shocking discovery. My little H5 is a 1835! I already knew it had case savers but had no idea what was in it. I measured the lift on the cam and got about .325 intake and .280 exhaust. Would this be a Stock cam? The heads are in rough shape and I just happen to have an old set of eepco big valve 40cc heads cut for 92’s laying around, so why not…no cracking behind cylinder 3 yet…according to my calc’s, with the current deck height measuring at 3.14 mm, I’m getting a CR of 8.5. Would this old beast run on 87 octane? Thanks |
Thats a lot of deck.
I’m sure it’d run on 87 with that cr, i got a guy running a 2180 i built last year with a little over 10:1cr on 91 octane.
Put it together and find out
_________________
Forced induction can overcome a lot of obsticles that gets in it's way
"You are the Engineer and the Mechanic.
Build it your way not the way someone else does it. Their way might not work for you." - clonebug
An interesting thing happens in forums where everyone starts parroting the same thing and "common knowledge" takes over.
“ The monkey see monkey do mentality seems to run deep in VW people. "Gene Berg said it was so 30 years ago so thats the way it is" “ - bdkw1 |
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Farva_84
Samba Member
Joined: October 25, 2021
Posts: 43
Location: MO
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| Posted: Sun Oct 22, 2023 7:46 pm Post subject: Re: The little H5 mystery build |
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| I had a feeling the deck height was excessive. BUT, considering the block, I’m throwing the eepco’s on and going to enjoy every last second of beating on it I can get out of it. I’ll run 89 just for a little extra safety. So far, the pistons and barrels are in ok shape and the rods have no play. The crank end play is still good. I’m curious to see how well it holds up with the new heads. It originally had a dellorto 45 with 26mm venturi’s but it wouldn’t ever idle. Not knowing it was a 1835, i switched over to a 34 pict 3 which ran circles around the drla. Guess I’ll see what happens! For the record, maybe because it’s open to the air, or maybe because it hasn’t been in great running condition since I got it, the little h5 case just keeps on going. |
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oprn
Samba Member
Joined: November 13, 2016
Posts: 12740
Location: Western Canada
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| Posted: Mon Oct 23, 2023 3:40 am Post subject: Re: The little H5 mystery build |
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I am presently running 8.4/1 with 87 octane. No issues at all.
_________________
We had the stone age, the bronze age, the industrial age and now we are in the age of mass deception and mind control for corporate profit. (The mass media age) |
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BFB
Samba Member
Joined: November 03, 2014
Posts: 1762
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| Posted: Mon Oct 23, 2023 4:59 pm Post subject: Re: The little H5 mystery build |
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| Farva_84 wrote: |
| I had a feeling the deck height was excessive. BUT, considering the block, I’m throwing the eepco’s on and going to enjoy every last second of beating on it I can get out of it. I’ll run 89 just for a little extra safety. So far, the pistons and barrels are in ok shape and the rods have no play. The crank end play is still good. I’m curious to see how well it holds up with the new heads. It originally had a dellorto 45 with 26mm venturi’s but it wouldn’t ever idle. Not knowing it was a 1835, i switched over to a 34 pict 3 which ran circles around the drla. Guess I’ll see what happens! For the record, maybe because it’s open to the air, or maybe because it hasn’t been in great running condition since I got it, the little h5 case just keeps on going. |
If it’s something you expect to blow and you flog it like its going to a valiant hero’s death to be praised forever in the halls of Valhalla , it’ll never die.
_________________
Forced induction can overcome a lot of obsticles that gets in it's way
"You are the Engineer and the Mechanic.
Build it your way not the way someone else does it. Their way might not work for you." - clonebug
An interesting thing happens in forums where everyone starts parroting the same thing and "common knowledge" takes over.
“ The monkey see monkey do mentality seems to run deep in VW people. "Gene Berg said it was so 30 years ago so thats the way it is" “ - bdkw1 |
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Farva_84
Samba Member
Joined: October 25, 2021
Posts: 43
Location: MO
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| Posted: Mon Oct 23, 2023 6:29 pm Post subject: Re: The little H5 mystery build |
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| Lmao!! I should be so lucky! I’m hoping to get the rest of my riding season out of it before it splits which lasts from this minute until about 10 days after the spring plant so here’s to a warm winter and some good luck! |
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