Skip to content
Aussieveedubbers

Should aircooled VW run richer air/fuel ratio

0 likes
Share Share on Facebook Share on X Share on Reddit
Log in to reply

Camo Custom Title Time!

1,936 posts · joined Oct 2007 ·

#1025898
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
I thought rebuilding a VW would be cheap - Shit I was wrong, just don't let the wife know !!!!

Click here for my (slowy) modded 1961 Beetle build.

HappyDaze Superannuated

2,887 posts · joined Jun 2009 ·

#1025900
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!

vw54 Administrator Always Waiting 4 Friday

16,723 posts · joined Aug 2002 ·

#1025902
slightly richer is good as per above to make it run cooler
I read it on FACEBOOK so it must be true


http://forums.aussieveedubbers.com/viewtopic.php?tid=91278&page=1#pid848630


http://forums.aussieveedubbers.com/viewtopic.php?tid=63561&page=1#pid624099


http://forums.aussieveedubbers.com/viewtopic.php?tid=4832&page=1#pid452603


http://forums.aussieveedubbers.com/viewtopic.php?tid=60650&page=1#pid574409

Camo Custom Title Time!

1,936 posts · joined Oct 2007 ·

#1025911
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
I thought rebuilding a VW would be cheap - Shit I was wrong, just don't let the wife know !!!!

Click here for my (slowy) modded 1961 Beetle build.

HappyDaze Superannuated

2,887 posts · joined Jun 2009 ·

#1025912
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!

vw54 Administrator Always Waiting 4 Friday

16,723 posts · joined Aug 2002 ·

#1025913
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
I read it on FACEBOOK so it must be true


http://forums.aussieveedubbers.com/viewtopic.php?tid=91278&page=1#pid848630


http://forums.aussieveedubbers.com/viewtopic.php?tid=63561&page=1#pid624099


http://forums.aussieveedubbers.com/viewtopic.php?tid=4832&page=1#pid452603


http://forums.aussieveedubbers.com/viewtopic.php?tid=60650&page=1#pid574409

Camo Custom Title Time!

1,936 posts · joined Oct 2007 ·

#1025925
hellbugged wrote:Kev

Please talk to lee Harris first

His turbo injected beetle has been running sweet for years.

Good thinking 99, I have his number so will give him a call 👍

Thanks, Kev
I thought rebuilding a VW would be cheap - Shit I was wrong, just don't let the wife know !!!!

Click here for my (slowy) modded 1961 Beetle build.

fish26 Fahrvergnugen

903 posts · joined Jul 2007 ·

#1025947
Will this be the first dyno tune since the engine build?
bitten by the bug..........several times