| [ Total Views: 1327 | Total Replies: 8 | Thread Id: 110918 ] |
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 Camo
A.k.a.: Kev
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| posted on May 2nd, 2016 at 09:08 AM |
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Should aircooled VW run richer air/fuel ratio
Hi all,
Firstly, this is about high performance VW engines.
I recall someone saying or reading once that air cooled VW engines should be run slightly richer than other engines. From memory I think it was to
aid slightly for heat issues in our engines, but I don't know.
So is there any truth to this and if you know either way for sure, please let me know.
Cheers, Kev
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HappyDaze
A.k.a.: Greg Mackie
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| posted on May 2nd, 2016 at 12:23 PM |
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Kev, the main thing is the engine must not run too hot. If the temperature can be kept at a safe level, without dropping a lot of power, then err on
the safe side and run a bit rich.
Do you have an air/fuel gauge fitted ?
I'd rather wear a Beetle out by racing it than by polishing it!
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 vw54
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| posted on May 2nd, 2016 at 01:59 PM |
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slightly richer is good as per above to make it run cooler
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Camo
A.k.a.: Kev
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| posted on May 2nd, 2016 at 05:31 PM |
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Thanks guys. I may be getting it dyno tuned this week with a guy that knows and uses my brand ECU (Megasuirt) but not sure if he knows about air
cooled vw's 
Thought if I knew for sure I could say tune it and then add 2-3% across all tables, just as an example 
Greg - Laptop displays the ratio, but not sure if it is accurate until dyno and he sticks thing up exhaust pipe to compare.
Dave - Water injection will also cool it  And this may be a future mod
Cheers, Kev
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HappyDaze
A.k.a.: Greg Mackie
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| posted on May 2nd, 2016 at 05:51 PM |
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Dyno AFR reading should be OK, but keep an eye on temps. Do you have a cylinder head temp. gauge ?
At 6000 RPM in 4th at Wakefield Park, No.8 Beetle showed 12.4 : 1 AFR on the gauge, and 350F on the CHT gauge, for what it's worth.
You need a big spark to run rich...hope yours is big enough ! I'm talking about spark, you fools. 
I'd rather wear a Beetle out by racing it than by polishing it!
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vw54
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| posted on May 2nd, 2016 at 08:14 PM |
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Water Injection tooooooo FKIN complicated
Use the KISS method for all things VW
Get a sensor up its bum and check the ratio pretty simple and cheaper than a dyno tune by a guy that DOES NOT no VWs
U will be 12 out of pocket
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hellbugged
A.k.a.: Daimo Pell
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| posted on May 3rd, 2016 at 06:24 AM |
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Kev
Please talk to lee Harris first
His turbo injected beetle has been running sweet for years.
http://forums.aussieveedubbers.com/viewprofile.php?memberid=592
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Camo
A.k.a.: Kev
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| posted on May 3rd, 2016 at 07:27 AM |
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| Quote: | Originally
posted by hellbugged
Kev
Please talk to lee Harris first
His turbo injected beetle has been running sweet for years.
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Good thinking 99, I have his number so will give him a call 
Thanks, Kev
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fish26
A.k.a.: benito
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| posted on May 3rd, 2016 at 09:09 PM |
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Will this be the first dyno tune since the engine build?
bitten by the bug..........several times
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