AirSpeed VW Community Forums

Technical => Engine Tech Forum => Topic started by: Hoosier Daddy on August 07, 2004, 10:09:17 AM

Title: Aircare Help Needed
Post by: Hoosier Daddy on August 07, 2004, 10:09:17 AM

Took the Square over to Aircare and failed the Carbon Monoxide on both the driving and idle.

Driving Test
CO% 8.61 (max is 4.22)

Idle Test
CO% 7.15 (max is 5.54)

Engine is a 1914
Stock Fuel Injection Heads
Dual 40 DCNF's
50 Idles
125 Mains
Engle 100 Cam

Anyone have any advice on what to do to bring down the CO numbers?

Thanks
Shane

Title: Aircare Help Needed
Post by: Black-Back on August 07, 2004, 10:22:14 AM

Call ASP......

Mike

Title: Aircare Help Needed
Post by: Bruce on August 07, 2004, 03:25:09 PM

Your idle jet is too big ----- 8.61%
and your idle mixture is set too rich ----- 7.15%

Try a 47 idle jet and re-adjust your mixture.

Title: Aircare Help Needed
Post by: captCRUNCH on August 07, 2004, 09:49:15 PM

hey shane, post your vin number so we can see the rest of your test. the aircare web site has a link to see the test results...

Title: Aircare Help Needed
Post by: Hoosier Daddy on August 08, 2004, 08:06:24 AM

Here it is 3622132855, I'll hit overseas on Monday and try the 47's

Wish me luck :D  

Title: Aircare Help Needed
Post by: Hansk on August 08, 2004, 08:01:11 PM

Hey Shane ,!!! don't buy any more jets!!  I have 50's and 47's .  I'm sure we opened yours  up to 60's.  My motor did not like to run on these but may do for the test for you.  Give me a call 5972689 (9:00ish)I'll be home morn. only

Title: Aircare Help Needed
Post by: Bruce on August 09, 2004, 03:28:58 AM

That sounds more like it.  Hard to believe a 50 idle jet could produce 8% CO.  Try the real 50s.

Title: Aircare Help Needed
Post by: Hoosier Daddy on August 09, 2004, 08:39:47 AM

Thanks Hans!

I'll post up my new numbers once I get through.  

Title: Aircare Help Needed
Post by: Hoosier Daddy on August 10, 2004, 03:18:36 PM

The 50's did it! We passed.

Thanks for all the advice and big thanks to Hans for the jets!  

Title: Aircare Help Needed
Post by: Bruce on August 10, 2004, 03:25:30 PM

I bet it runs better too?

Title: Aircare Help Needed
Post by: Hoosier Daddy on August 10, 2004, 03:46:50 PM

I only had a chance to rip around the block before my wife had to take it aircare then work.

But it did feel alot better.

Bruce, do you think my mains are okay? Or should I bump them up a bit?

Title: Aircare Help Needed
Post by: Bruce on August 11, 2004, 01:51:27 AM

It depends on the venturi size.  What size do you have?

Title: Aircare Help Needed
Post by: Hoosier Daddy on August 11, 2004, 07:14:01 AM

32 vents

Title: Aircare Help Needed
Post by: Black-Back on August 12, 2004, 12:35:16 PM

If I'm not mistaken, you multiply your vent size by 4.1-4.3 or so to get a rough main jet size. example: 32x4.2=134.4 so start with 135 mains and see how she goes.

Mike

Title: Aircare Help Needed
Post by: Bruce on August 16, 2004, 10:16:30 AM

I've never seen any engine on pump gas that needed a main jet larger than 4.0x the vent.  Race gas has less density so they go over 4.0, but not street gas.

In this case I bet the 125 main will be good.  Test by installing some 120s, if the power drops off big time, the 125s are the way to go.  How is it above 3500 rpm with the 125s?