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gonebuggy
Samba Member
Joined: June 23, 2005
Posts: 691
Location: Canada
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 Posted: Wed Apr 27, 2011 3:13 pm Post subject: Jetting |
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Hey all,
just looking to bounce some ideas around.
Currently I'm dialing in the jetting on my 2110 (90.5x82)
5.4 rods
Web 86a 1.4
40x35 heads
9.5-1
44IDF
First round:
I had 36mm vents, 55 idles 155 mains 200 airs
Ran pretty good! def a little rich on the top end, throttle response was good but not quite as snappy as I'd like.
Second round:
34mm vents, 50 idles 140 mains, 200 airs.
Feels really loaded up and runs pretty bad. Horrible throttle response and little power
What are your guys thoughts? With the cam/head/rod combo I think the carbs are getting a very strong signal, and that the 36 vents might be more to their liking. I'm thinking of putting the 36's back in and playing around with the jetting. Any advice, criticism or comments?
Cheers,
Alex |
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Ragman
The Sambinator
Joined: July 18, 2003
Posts: 3518
Location: Denver
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| Posted: Wed Apr 27, 2011 3:25 pm Post subject: |
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| what is your altitude where you are at? |
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gonebuggy
Samba Member
Joined: June 23, 2005
Posts: 691
Location: Canada
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| Posted: Wed Apr 27, 2011 3:30 pm Post subject: |
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Good point!
just a few hundred feet above sea level (Toronto Ontario, Canada)
Alex |
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66brm
Samba Member
Joined: January 25, 2010
Posts: 3676
Location: Perth Western Australia
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| Posted: Wed Apr 27, 2011 6:25 pm Post subject: |
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I would try the 36's with the 55 idles, 140 mains, 200 airs, what emulsion tubes do you have? F11 should be right, you may need to go up on the mains a touch too, perhaps 150's. What is your timing set at?
_________________
Aust. RHD 66 Type 1
Aust. RHD 57 Type 1 Oval
| modok wrote: |
| I am an expert at fitting things in holes, been doing it a long time |
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gonebuggy
Samba Member
Joined: June 23, 2005
Posts: 691
Location: Canada
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| Posted: Wed Apr 27, 2011 6:29 pm Post subject: |
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| 66brm wrote: |
| I would try the 36's with the 55 idles, 140 mains, 200 airs, what emulsion tubes do you have? F11 should be right, you may need to go up on the mains a touch too, perhaps 150's. What is your timing set at? |
I'll give that a shot! The emulsion tubes are F11. Timing is 32* at full advance on a 009. I might drop it a degree or two to help with the smaller mains.
Alex |
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Ragman
The Sambinator
Joined: July 18, 2003
Posts: 3518
Location: Denver
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| Posted: Wed Apr 27, 2011 7:49 pm Post subject: |
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| I would try 150 mains, 55 idles, 200 airs with those 36 vents. |
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Hophead
Samba Member
Joined: January 03, 2005
Posts: 940
Location: Chico,Ca
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| Posted: Wed Apr 27, 2011 10:15 pm Post subject: |
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I am building a 2110 as well. I had seen somewhere that with dual 44s to start with a 145 main jet....That is what i bought.
_________________
70' Beetle Pan off Resto
2110cc
82 X 90.5
P&P 043 40x35.5
9.6-1 comp
FK-8
48 IDA |
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66brm
Samba Member
Joined: January 25, 2010
Posts: 3676
Location: Perth Western Australia
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| Posted: Wed Apr 27, 2011 10:49 pm Post subject: |
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Remember these are just a guideline, each engine is unique in how it will respond to jetting changes, cam, compression, deck height, port work, manifolds, and exhaust will all affect the final jetting and getting it right. It takes time and a lot of fiddling to get it correct, even with a wideband O2 setup, to get transition right and have it a smooth streetable engine takes experience.
_________________
Aust. RHD 66 Type 1
Aust. RHD 57 Type 1 Oval
| modok wrote: |
| I am an expert at fitting things in holes, been doing it a long time |
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RailBoy
Samba Member
Joined: March 10, 2008
Posts: 2904
Location: Virginia
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| Posted: Thu Apr 28, 2011 2:09 am Post subject: Jetting |
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| Just wondering if we are over looking something here, it says in your first post 44 IDF, is this a Single IDF or Dual IDF's???? Just for Clarity....... RB |
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gonebuggy
Samba Member
Joined: June 23, 2005
Posts: 691
Location: Canada
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| Posted: Thu Apr 28, 2011 2:50 am Post subject: Re: Jetting |
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| RailBoy wrote: |
| Just wondering if we are over looking something here, it says in your first post 44 IDF, is this a Single IDF or Dual IDF's???? Just for Clarity....... RB |
dual |
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