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williamM Samba Member
Joined: August 07, 2008 Posts: 4333 Location: southwest Arizona
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Posted: Mon Jun 03, 2013 7:16 am Post subject: Squatty or tall manifolds on 2.0 carbed |
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I have just finished a 2.0 lt on 1800 heads and want to decide which intake manifolds for stock duals would perform the best and maybe some hints on jetting.
Also which tins cool the best on this set up? _________________ some days I get up and just sit and think. Some days I just sit.
opinion untempered by fact is ignorance.
Don't step in any! |
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Bleyseng Samba Member
Joined: July 03, 2005 Posts: 4752 Location: Seattle
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Posted: Mon Jun 03, 2013 7:37 am Post subject: |
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For best cooling make sure to use ALL of the tins and carefully fit them together including the very bottom pieces that cover the pushrod tubes. _________________ 70 Ghia Black convert-9/69 build date-stock w/133k 1600 SP-barn find now with a rebuilt tranny and engine
77 Westy 2.0L w/Ljet, Camper Special engine-95hp and with LSD!(sold)
76 Porsche 914 2.1L L20c, 120hp Djet (sold)
87 Syncro Westy Titan Red 2.1L 2 knob 100k miles |
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babysnakes Samba Member
Joined: August 19, 2008 Posts: 7107
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Posted: Mon Jun 03, 2013 9:20 am Post subject: |
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The shorter manifolds should provide more torque than talls. But the shortys also get hotter at the carb than a tall manifold. |
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williamM Samba Member
Joined: August 07, 2008 Posts: 4333 Location: southwest Arizona
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Posted: Mon Jun 03, 2013 9:50 am Post subject: Thanks! |
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Would putting the FI insulator blocks in there help with the heat- Torque is good! _________________ some days I get up and just sit and think. Some days I just sit.
opinion untempered by fact is ignorance.
Don't step in any! |
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skills@eurocarsplus Samba Peckerhead
Joined: January 01, 2007 Posts: 16883 Location: sticksville, ct.
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Posted: Mon Jun 03, 2013 10:26 am Post subject: |
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Tall. Easier to dial in, fuel has a better chance of vaporization. I ran shorts for ict's, swapped out for talls an had way better throttle response and they were easier to tune. Did I mention better throttle response?
Ditched it all and run dell 36's _________________
gprudenciop wrote: |
my reason for switching to subaru is my german car was turning chinese so i said fuck it and went japanese....... |
Jake Raby wrote: |
Thanks for the correction. I used to be a nice guy, then I ruined it by exposing myself to the public. |
Brian wrote: |
Also the fact that people are agreeing with Skills, it's a turn of events for samba history |
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SGKent Samba Member
Joined: October 30, 2007 Posts: 41031 Location: Citrus Heights CA (Near Sacramento)
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Posted: Mon Jun 03, 2013 10:42 am Post subject: |
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tall will give a better low end as well as fuel mixing. In some climates it would be more prone to icing. I would think that on a bus tall would be better but were it me I call John at aircooled and asked him what his experience is with them. We have no idea what the resonate length is of your engine and what RPM you are trying to get max power out.
http://www.wallaceracing.com/runnertorquecalc.php
1600 (97cu) with 4 cylinders and 5000 RPM peak HP:
Optimum Intake runner area 1.37 square inches (calculated)
Optimum Intake Length 16.80 inches long (from valve head to plenum). _________________ “Most people don’t know what they’re doing, and a lot of them are really good at it.” - George Carlin |
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Bleyseng Samba Member
Joined: July 03, 2005 Posts: 4752 Location: Seattle
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Posted: Mon Jun 03, 2013 12:57 pm Post subject: |
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Short if you want higher rev's but tall for better low end which IMHO is the best for a bus. _________________ 70 Ghia Black convert-9/69 build date-stock w/133k 1600 SP-barn find now with a rebuilt tranny and engine
77 Westy 2.0L w/Ljet, Camper Special engine-95hp and with LSD!(sold)
76 Porsche 914 2.1L L20c, 120hp Djet (sold)
87 Syncro Westy Titan Red 2.1L 2 knob 100k miles |
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babysnakes Samba Member
Joined: August 19, 2008 Posts: 7107
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Posted: Mon Jun 03, 2013 12:57 pm Post subject: |
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I've always used talls. When I got my second set of 34ICT's a couple of years ago they came with shorts. I used the talls because the shorts had no balance tubes to use for the power booster. They seem to work fine. |
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SGKent Samba Member
Joined: October 30, 2007 Posts: 41031 Location: Citrus Heights CA (Near Sacramento)
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Posted: Mon Jun 03, 2013 1:28 pm Post subject: |
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it is like a flute - the longer the tube the lower the oscillation frequency it supports. The optimal distance from the top of the air horn to the back of the intake valve would be 16.8 inches at a peak HP at 5000 RPM on a 1600 engine. _________________ “Most people don’t know what they’re doing, and a lot of them are really good at it.” - George Carlin |
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CoastalAirCooledVW Samba Member
Joined: September 02, 2012 Posts: 1882 Location: Mckinleyville, CA (Humboldt County)
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Posted: Mon Jun 03, 2013 6:12 pm Post subject: |
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What air cleaner set up are you planning on using? If you are going for a stock look I would recommend the tall manifolds so that you can use the paper air filter instead of the dual carb oil bath which I have a strong love hate relationship with. _________________ 1966 Velvet Green Standard |
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