| [ Total Views: 548 | Total Replies: 8 | Thread Id: 44927 ] |
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 Quoll
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| posted on October 18th, 2005 at 04:40 PM |
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Do I need to change jets?
I have noticed that my acceleration from about 40% throttle onwards doesn’t make that much of a difference, is this a jetting issue or something
else?
Thanks. |
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vwrallycar
A.k.a.: Andrew Rankin
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| posted on October 18th, 2005 at 07:56 PM |
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what engine, vehicle and engine combo do u have?
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ACE_76
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| posted on October 19th, 2005 at 12:57 AM |
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Could be accelerator pump not working, blocked main jet, vacuum OR mechanical advance not working (eg. vacuum-line fallen off; points plate stuck).
Also possible: very retarded timing, severe vacuum leak, etc.
Was it a sudden change in "behaviour"? Or a gradual process.
I got 1/2 mile from home this morning, all systems A-OK. But beetle wouldn't go up first slight hill - very weak! - almost went home to work on
carb/whatever. Checked & soon found a small stone under accel. pedal... a one-second fix! |
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 vw54
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| posted on October 19th, 2005 at 06:15 AM |
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Check the travel of the accelerator to see if your getting full throttle when pushed all the way to the floor make sure the carby open up all the
way.
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Quoll
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| posted on October 19th, 2005 at 01:22 PM |
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My current setup:
stock everything but
88mm pistons
Holley bugspray (200cfm)
P&P 040s *home job
econo extractors
009 dizzy
I have my timing a little over advanced if anything, 32 deg at around 2700 rpm (all in.)
power really isn't an issue as it still comes up hills etc with no problems at all I just find is strange that there’s not much of a power
difference, I will check the vacuum plug now, The accelerator is opening the carb all the way, it was the first thing I checked  .
Thanks for your replies :thumb
Edit: I just had a fiddle around and noticed that the vacuum plug on the cars looking a bit sad I'll see if I can fix it up.
why I asked about jetting is I pretty much got the carb made a manifold then slapped it on so I have no idea what it has been jetted for thus why I
think it could be a jetting issue.
[ Edited on 19-10-2005 by Quoll ] |
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Quoll
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| posted on October 23rd, 2005 at 07:44 PM |
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Humm fixing it didn’t seem to make much difference any ideas people?
:bounce
[ Edited on 23-10-2005 by Quoll ] |
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ACE_76
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| posted on October 25th, 2005 at 11:12 AM |
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There is a good write-up on the Holley Bug-Sprays in the "Carburetion" section of the book by Bill Fisher: 'How to Hotrod Volkswagen Engines'. |
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mnsKmobi
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| posted on October 25th, 2005 at 01:09 PM |
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What jets do you currently have?
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empi
A.k.a.: Empstar
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| posted on October 26th, 2005 at 08:34 AM |
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colud be 009
"If at first you don't succeed, skydiving is not for you." - Anonymous  |
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