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samba`57 Samba Member
Joined: August 23, 2003 Posts: 171 Location: Netherlands
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Posted: Sun May 13, 2012 11:30 am Post subject: Single carb on 1776 |
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Thinking of using a single carb on my 1776 DP with 110 cam. I like the single carb look. Which carb would be the best option?
Any estimate how much HP loss there will be not using double carbs? ( 2 single Solex 34's)
Thanks KJ |
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HRVW Samba Member
Joined: May 01, 2011 Posts: 2531 Location: Rosarito, Mexico
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Posted: Sun May 13, 2012 12:06 pm Post subject: |
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A 1776cc (90.5) pistons will need more fuel...not less in order to run efficiently.
A cool nice look is not the way to go..
I have the same size engine (Turbo) with the Weber side draft carb.
It makes power.
You could/should run with either the Dual Webers (NO ICT 34 carbs) but the 40mm Kadron will work nicely if not Webers or Delortos...the last three being the best choice. I have seen them all.
The 34 ICT will work with the stock 1600cc and the Kadrons with a 1641 (87mm) setup with or w/o a special cam. The 110 is a nice mileage street cam.
Bound to be a difference of opinions thats for sure...just mine here. |
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aryue Samba Member
Joined: January 16, 2006 Posts: 1027 Location: Austin, TX
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Posted: Sun May 13, 2012 1:21 pm Post subject: |
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My educated guess is at 4,000 rpm - you'll lose about 15 to 20 SAE HP with a stock single Solex.
At 4500 rpm - the loss rises to over 20 SAE HP, because the HP will be dropping once the revs go beyond 4K on a 1776cc running a stock Solex.
Bottom line: With a single 34 PICT Solex and stock camshaft - your torque curve will be in decline by 3,000 rpm on a 1776cc air cooler.
Dependent on the grind of the camshaft, the torque curve with duals will be nice and flat or rising until 3500 rpm.
Kaddy Shack has a chart comparing a stock 1600 with an upgrade to Kads.
http://kaddieshack.com/1600dynoresults.html
Note the torque curve for the 1.4 to 1 ratio rockers. It's solid until about 3500 rpm.
- Andrew in Austin, TX - _________________ OldandSlow - but still chuggin.
http://www.ph.utexas.edu/~yue/VW/VWBus.html |
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Bohdan Samba Member
Joined: November 21, 2007 Posts: 143 Location: Venice, Florida
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Posted: Mon May 14, 2012 5:13 am Post subject: |
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I have a 1776 with a single 40IDF. Runs like a champ, but I am fouling plugs now. Trying my best to get it jetted right. |
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borninabus Samba R&D Dept.
Joined: May 18, 2006 Posts: 4539 Location: Arizona Highways
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Posted: Mon May 14, 2012 8:20 am Post subject: |
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ZENITH
_________________ 88 Van WBX, A/T - 13 JSW TDI 6M/T - 2012 Touareg TDI Sport |
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aryue Samba Member
Joined: January 16, 2006 Posts: 1027 Location: Austin, TX
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borninabus Samba R&D Dept.
Joined: May 18, 2006 Posts: 4539 Location: Arizona Highways
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Posted: Mon May 14, 2012 12:01 pm Post subject: |
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the "k&n" type air cleaner & cut-out mod made a HUGE difference.
and so did the effort i put into ensuring proper manifold & and intake air heat.
http://www.thesamba.com/vw/forum/viewtopic.php?t=386388&highlight=progressive
and so did all the work i did on the heads.
http://www.thesamba.com/vw/forum/viewtopic.php?t=478262&highlight=compression
the carb itself is just one piece of the engine "system".
borninabus wrote: |
1600DP
counter-weighted VW crank
040 heads worked over by ME
stock long block/cam; 7.4:1 C/R
Bosch VJR4 BR8 (o19) dist - with BREMI points
Zenith 32 NDIX on a vintage EMPI manifold
vintage Treuhaft header & muffler - with proper heat riser
genuine Porsche swivel feet valve adjusters
T4 oil cooler w/ hoover bit & working thermostat
356 fan pulley (not pictured)
Berg Equalizer (not pictured)
modified stock air cleaner also with proper preheat
engine built, ancillaries assembled, installed & tuned by ME
275cht - 180ot - 25mpg - 65mph |
_________________ 88 Van WBX, A/T - 13 JSW TDI 6M/T - 2012 Touareg TDI Sport |
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ccpalmer Samba Member
Joined: September 17, 2006 Posts: 3850 Location: Ann Arbor, Michigan
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Posted: Mon May 14, 2012 2:39 pm Post subject: |
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My 34PICT with 1776/110 cam does great on the highway in a Westy... I also like the stock look... unless Pete gives me a Zenith! _________________ '71 Westy |
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slimesub5 Samba Member
Joined: December 13, 2005 Posts: 64 Location: Essex UK
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Posted: Sun Nov 16, 2014 2:56 am Post subject: |
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ccpalmer wrote: |
My 34PICT with 1776/110 cam does great on the highway in a Westy... I also like the stock look... unless Pete gives me a Zenith! |
Sorry to raise an old post, what jetting and dizzy are you running?
Thanks, |
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ccpalmer Samba Member
Joined: September 17, 2006 Posts: 3850 Location: Ann Arbor, Michigan
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Posted: Sun Nov 16, 2014 9:05 am Post subject: |
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I am running a 130 main, 60z air and 55 pilot jet. 205z distributor. _________________ '71 Westy |
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Dan Ruddock Samba Member
Joined: October 25, 2012 Posts: 3594 Location: Sarasota, in my adopted state of Florida
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Posted: Sun Nov 16, 2014 10:10 am Post subject: |
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I would like to see someone make a well heated 360 degree single 2 barrel carb manifold.
Dan |
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