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TheViking
Samba Member
Joined: March 04, 2016
Posts: 278
Location: Norway
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 Posted: Sun Aug 04, 2019 7:21 am Post subject: Re: 1955cc Single Port |
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| 67rustavenger wrote: |
Not really. The engine (as planned) is choked by the design/plan.
It cannot breath.
It'll have a lot of torque. But no real usable horsepower.
| TheViking wrote: |
| 67rustavenger wrote: |
More info needed.
Cam?
Exhaust?
Based on the lack info,
Sp heads, 1.25:1 rockers, stock cam, and exhaust, 10.0:1 CR.
65.5 HP@ 3500 RPM
Torque 126.5 @ 2500 RPM
Why bother building this?
It's limp! Unless you're looking to pull stumps.
Good Luck. |
More than that. My 1584cc single port with kadrons got 61 whp... |
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Then how does my 1584cc make more crank hp than you said this would?? Take a look at this......
Link
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67rustavenger 
Samba Member
Joined: February 24, 2015
Posts: 9767
Location: Oregon
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| Posted: Sun Aug 04, 2019 9:30 am Post subject: Re: 1955cc Single Port |
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I am not referring to your engine Viking. The ops choice of build is choked by the small intake valves. It can only flow so much fuel/air before it starves for air.
Your combo works well for the displacement.
Good Luck.
| TheViking wrote: |
| 67rustavenger wrote: |
Not really. The engine (as planned) is choked by the design/plan.
It cannot breath.
It'll have a lot of torque. But no real usable horsepower.
| TheViking wrote: |
| 67rustavenger wrote: |
More info needed.
Cam?
Exhaust?
Based on the lack info,
Sp heads, 1.25:1 rockers, stock cam, and exhaust, 10.0:1 CR.
65.5 HP@ 3500 RPM
Torque 126.5 @ 2500 RPM
Why bother building this?
It's limp! Unless you're looking to pull stumps.
Good Luck. |
More than that. My 1584cc single port with kadrons got 61 whp... |
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Then how does my 1584cc make more crank hp than you said this would?? Take a look at this......
Link
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_________________
I have learned over the years.
Cheap parts are gonna disappoint you.
Buy Once, Cry Once!
There's never enough time to do it right the first time. But there's always enough time to do it thrice.
GFY's Xevin and VW_Jimbo! |
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FRNKNSTNGHIA
Samba Member
Joined: March 05, 2010
Posts: 411
Location: Kissimmee, FL
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| Posted: Sun Aug 04, 2019 8:48 pm Post subject: Re: 1955cc Single Port |
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[quote=
Based on the lack info,
Sp heads, 1.25:1 rockers, stock cam, and exhaust, 10.0:1 CR.
65.5 HP@ 3500 RPM
Torque 126.5 @ 2500 RPM
Why bother building this?
It's limp! Unless you're looking to pull stumps.
Good Luck.[/quote]
What’s it say when you throw a W100 in the mix? Also dual 34 either ICT or Dellorto. Figure about same flow. I predict around 90hp and 130tq. |
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modok
Samba Member
Joined: October 30, 2009
Posts: 26787
Location: Colorado Springs
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| Posted: Sun Aug 04, 2019 9:01 pm Post subject: Re: 1955cc Single Port |
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SP heads should be able to get up to 90, maybe 100 hp, without any CRAZY mods. Larger intake manifold, engle 100 ish cam, raise compression.
BTW, SPLIT the compression...... you can go higher on cylinders 2 and 4
yeah kinds strange idea, but try it. you'll see |
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modok
Samba Member
Joined: October 30, 2009
Posts: 26787
Location: Colorado Springs
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| Posted: Sun Aug 04, 2019 9:04 pm Post subject: Re: 1955cc Single Port |
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| bugguy1967 wrote: |
Geez! What did you do to the exhaust ports? You think your fluffing of the intakes warranted such a drastic increase of the exhaust port X-section?
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yeah....but those are dual port heads in the picture. he fooled ya 
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jeffrey8164
Samba Member
Joined: January 06, 2018
Posts: 3818
Location: Georgia
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| Posted: Mon Aug 05, 2019 8:24 am Post subject: Re: 1955cc Single Port |
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| modok wrote: |
BTW, SPLIT the compression...... you can go higher on cylinders 2 and 4
yeah kinds strange idea, but try it. you'll see |
How do you that? Different chamber cc’s?
Can this one off strategy work with multiple engine configs?
_________________
Volkswagen!
Turning owners into mechanics since 1938.
“Let he that is without oil throw the first rod”
(Compression 8.7:1) |
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Alstrup
Samba Member
Joined: July 12, 2007
Posts: 7216
Location: Videbaek Denmark
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| Posted: Mon Aug 05, 2019 4:37 pm Post subject: Re: 1955cc Single Port |
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| Yes. But IRL it does not make any significant difference unless you are chasing really high hp. Also it creates another issue, that is unbalance due to 2 cylinders pull more than the other 2, and at a different rpm range. Not recommendable. |
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67rustavenger
Samba Member
Joined: February 24, 2015
Posts: 9767
Location: Oregon
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| Posted: Mon Aug 05, 2019 5:23 pm Post subject: Re: 1955cc Single Port |
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84.5 HP @ 4500 RPM
130.2 FT/LB torque @3000 RPM
Using 1 3/8" exhaust.
But at 10:1 compression. You'll need race gas.
Good Luck.
| FRNKNSTNGHIA wrote: |
What’s it say when you throw a W100 in the mix? Also dual 34 either ICT or Dellorto. Figure about same flow. I predict around 90hp and 130tq. |
_________________
I have learned over the years.
Cheap parts are gonna disappoint you.
Buy Once, Cry Once!
There's never enough time to do it right the first time. But there's always enough time to do it thrice.
GFY's Xevin and VW_Jimbo! |
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modok
Samba Member
Joined: October 30, 2009
Posts: 26787
Location: Colorado Springs
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| Posted: Mon Aug 05, 2019 11:33 pm Post subject: Re: 1955cc Single Port |
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| Alstrup wrote: |
| Yes. But IRL it does not make any significant difference unless you are chasing really high hp. Also it creates another issue, that is unbalance due to 2 cylinders pull more than the other 2, and at a different rpm range. Not recommendable. |
Your an ignition nut, right? put use a wasted spark system, dual drivers, Find the ideal advance for each cylinder. You will see.
That's too much work? YES I agree. So, instead, I try to make the engine so each cylinder NEEDS the same advance, and make even more power! HAHAHA |
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modok
Samba Member
Joined: October 30, 2009
Posts: 26787
Location: Colorado Springs
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| Posted: Tue Aug 06, 2019 12:07 am Post subject: Re: 1955cc Single Port |
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| jeffrey8164 wrote: |
| modok wrote: |
BTW, SPLIT the compression...... you can go higher on cylinders 2 and 4
yeah kinds strange idea, but try it. you'll see |
How do you that? Different chamber cc’s?
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yeah. Thought I'd bring it up, if he get tired of race gas.
SP with kadrons or a single IDF/DRLA, or when you have a throttle for each side, and a fairly long intake runner, duration around 240 at 050 (or more, though hopefully not much more), tuned exhaust,
probably can have 1 CR point difference. A near stock SP, maybe just .3 difference.
Main thing is when you have one long intake runner feeding TWO cylinders, the first cylinder's ram charge ends up bleeding into the second, and the second cylinder get even MOre ram boost, and as the cam duration increases the difference gets more pronounced.
I considered different size cylinders (it's been done!), as well as scatter cams, as well as twisting the crankshaft, but........thing is
it doesn't really matter how much goes through which cylinder, as long as it all burns. "splitting" the compression ratio is rarely done but as far as I can tell, 100% technically viable. it's just that by the time anybody knew that, engines already "grew" port injection and symmetrical manifolds and had to pass smog tests, so.... too late.
Why even bother? it's not possible to equal DP heads for power even with twisting the crankshaft, but the overall combo of good low rpm tractability, good fuel mileage, could be nice. Maybe it could be the engine VW SHOULD have built, instead of paying porsche to develop the worlds smallest sportscar and other stupidity. |
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Alstrup
Samba Member
Joined: July 12, 2007
Posts: 7216
Location: Videbaek Denmark
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| Posted: Tue Aug 06, 2019 4:21 am Post subject: Re: 1955cc Single Port |
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VW did play with the idea back when they did prototype engines for their first production series. It never came even close to go into mass production. It was not even close to It was soon decided that it would be a way too complicated engine for the average mechanic at the time. Also, like I wrote earlier, the gain was minimal on a production engine.
I do not know if they worked with off set cranks. I do not remember to have read anything about that.
As for the Nowegian 1600 sgl port "race" engine. The power sounds/looks right. Back in 2011/12 I think it was, I did a write up on a 1914 sgl port bus engine I did for a German customer who wanted sgl port heads for the right look, but more power to push his split bus camper. Also he did not want any "ratata" idle. I was around 3 cams and 3 exhaust systems plus varius carb/ignition combo´s. In the best set up the engine pulled about the same power (114 hp IIRC) The guy did not like the exhaust, so a more "subtle" exhaust was chosen which reduced peak power to about 105 hp. That was also when I figured out that sgl port heads works better relatively with slightly less bore and more stroke. I have not built a 1914 sgl port again after that.
I recently redid a 2 liter sgl port Limbach converted for a split bus. The engine had issues the first time around, which was basicly due to me trusting another company´s work.Should´nt have done that. Then the owner unfortunately made a woopsie, so at that point we had to take it apart. While it was apart again I made a couple of small changes and timed the cam slightly different. This seems to work well. Initial tests showed just shy of 90 hp. still with stock look apart from the muffler. |
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FRNKNSTNGHIA
Samba Member
Joined: March 05, 2010
Posts: 411
Location: Kissimmee, FL
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| Posted: Fri Oct 04, 2019 1:08 pm Post subject: Re: 1955cc Single Port |
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So update:
Please give me insight, opinions, complaints etc.
This is where I am at. I picked up engine from builder. Here are the specs I have received:
1955cc
90.5 b-pistons
5.5" I-beams w/ ARP rod bolts
ARP head bolts
76 C/W crank
Ported Single Port heads
-SS Valves 35x32
-HD Single Springs
-Chromoly Retainers
-Engle W100 w/ lifters
-1.25 Rockers
-58cc
- .040 deck height (will this be an issue)
-10.0:1 Compression
-Micropolished Crank
-Dynamically Balanced entire rotating assembly
SP Weber ICT manifolds port-matched w/ 1" spacer
Weber ICT properly jetted for setup.
CSP Pacemaker Distributor w/ Bosch Coil
38mm exhaust (most likely Vintage Speed Super Sport)
What kind of power/torque numbers? |
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Alstrup
Samba Member
Joined: July 12, 2007
Posts: 7216
Location: Videbaek Denmark
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| Posted: Fri Oct 04, 2019 1:43 pm Post subject: Re: 1955cc Single Port |
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I hope the pacemaker is the USB or bluetooth version. The basic ones are junk IMHO.
Apart from that, fine.
Dependant on just how well your cylinderheads perform you will most likely almost max out those poor little 34´s.
On a good day,,, 101 hp @ 4800 and 165-170 Nm torque, on SAE60 correction 
Did we talk about stacks on the 34´s? They like that. 2" is good. |
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Brian_e
Samba Member
Joined: July 28, 2009
Posts: 3291
Location: Rapid City, SD
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| Posted: Fri Oct 04, 2019 3:10 pm Post subject: Re: 1955cc Single Port |
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90.5x76 with 58cc chambers and a .040 deck = 8.6cr.
Hopefully the 58cc was a missprint.
And I vote upgrade to 40mm Kadrons. And a 36.5mm intake valve. 
Brian
_________________
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FRNKNSTNGHIA
Samba Member
Joined: March 05, 2010
Posts: 411
Location: Kissimmee, FL
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| Posted: Sat Oct 05, 2019 10:09 pm Post subject: Re: 1955cc Single Port |
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| Alstrup wrote: |
I hope the pacemaker is the USB or bluetooth version. The basic ones are junk IMHO.
Apart from that, fine.
Dependant on just how well your cylinderheads perform you will most likely almost max out those poor little 34´s.
On a good day,,, 101 hp @ 4800 and 165-170 Nm torque, on SAE60 correction
Did we talk about stacks on the 34´s? They like that. 2" is good. |
100 brake hp or 100 wheel hp?
165-170 converts to 120-125tq. |
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Alstrup
Samba Member
Joined: July 12, 2007
Posts: 7216
Location: Videbaek Denmark
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| Posted: Sun Oct 06, 2019 2:53 am Post subject: Re: 1955cc Single Port |
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| Brake hp. |
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FRNKNSTNGHIA
Samba Member
Joined: March 05, 2010
Posts: 411
Location: Kissimmee, FL
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| Posted: Tue Oct 15, 2019 4:00 pm Post subject: Re: 1955cc Single Port |
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| FRNKNSTNGHIA wrote: |
1955cc
90.5x76
Ported Single Port heads
-SS Valves
-HD Single Springs
-Chromoly Retainers
-1.25 Rockers
-48cc (UPDATED)
-10.0:1 Compression
-Micropolished Crank
-Dynamically Balanced rotating assembly
Dellorto FRDs
-29mm venturi
What kind of power/torque numbers? |
Will the 48cc chamber change previous power/torque estimates? |
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mark tucker
Samba Member
Joined: April 08, 2009
Posts: 23937
Location: SHALIMAR ,FLORIDA
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| Posted: Tue Oct 15, 2019 4:26 pm Post subject: Re: 1955cc Single Port |
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| if the ex ports were left alone, and the short side worked on and around the guide bosses then wack WFO the intake port and add a spliter....and some good chamber work.....and....a lot of oh never mind.. |
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FRNKNSTNGHIA
Samba Member
Joined: March 05, 2010
Posts: 411
Location: Kissimmee, FL
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| Posted: Tue Oct 15, 2019 5:09 pm Post subject: Re: 1955cc Single Port |
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| mark tucker wrote: |
| if the ex ports were left alone, and the short side worked on and around the guide bosses then wack WFO the intake port and add a spliter....and some good chamber work.....and....a lot of oh never mind.. |
Lol |
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Lingwendil
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Joined: February 25, 2009
Posts: 3988
Location: Antioch, California, a block from the hood
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