1/4 Mile Results with Mild Stroker

[GARRICK.CLARK]

Gkeeton. Doing a 2007 for a customer. Tuning it is impossible without the AFR gauge as you have said. He's dropped a PLX off so looks like I've got that to fit before I jet it.

[chrisflstf]

Congrats jeff on the baby. I appreciate all your common sense approach to issues. Keep it up

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[GARRICK.CLARK]

If I hadn't got an AFR gauge on my turbo motor it would have been impossible. My motors a nightmare to tune. Bizarrely it only likes 1 combo of jets. It's 1 of those motors that really needs injection but it's finding the time to do it. Plus it's means spending more of me hard earned cash on it which I don't want to do.

[74 Thing]

Congrats to Jeff and his family! I hope all of you are doing well.

For the leaning out in the upper rpm range problem it seems you have addressed the pump and fuel line size issues.

Are there any restrictions in the tank such as the small fitting on the outlet or possible filter/screen inside?

There was a comment about venting the tank to a proper size so there would be no restrictions in flow in the upper rpms. That is something to look at and should be able to test easily by loosening or removing the gas cap temporarily.

Is it possible there is something going on with the floats (sticking or a float adjustment necessary that got out of wack) or float bowls or restrictions on the carb inlets or larger needle/seats needed?

You are running 38 venturis and I am assuming your jetting is close with the exception of something happening in the upper rpms. There was a suggestion about changing emulsion tubes. This may be something to look closely at as well since some will enable richer mixtures in the upper rpm range. Some info is here on the effect of different emulsion tubes http://www.turbosport.co.uk/showthread.php?t=169101 http://www.timsroadster.com/html/tuning_webers.html

Per David Vizard, "Hold the tube upside down (main jet up).
The top of the emulsion tube now represents the top of the rpm range and the bottom end the bottom of the rpm range.
Where there are holes the mixture will be leaner.
Where there are no holes it will be richer.
You should be able to home in on the right tube now really quickly."

Just trying to throw some things out there to think about and consider to get this resolved and running even better.

[HotStreetVw]

Congrats on the baby Jeff.

What idle jets are you running? 3rd progression hole?
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4inBhore
50 Split - 2724cc NA. Haltech injected
62 Notchback - 2542cc Turbo WIP

[Erik G]

congrats on the little girl, and good fitting name! Can't tell for sure but that video coming home from the track looks like winding way by my folks house. I've seen and heard a lot of VW's at Sac Raceway over the last 25 years, and yours has that sound that makes me know it's gonna be a nice pass. I'll be sad if it does indeed close
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[jpaull]

Thank you Big Jack, Lingwindil, Chickensoup, C77owen, Chrisflstf, 74thing and Hotstreet, It was a great day!

74thing, thanks for all the info, After I will consider some different emulsion tubes. I need less holes at the top or smaller air jet.

Hotstreet, I did try out some ida's before, but I went back to idf's, as I really wanted to go as fast as i could with non race stuff. I know the ida's work great, but i just wanted to see how fast i can go with idf's. The ida's that i tried out but not ever at the track do have the third progression hole.

Erik G, Thanks! And yes you got that right, that part of the video is on winding way east of Sunrise blvd and west of Hazel. I'm glad you recognize the sound too, Part of that is having as much compression as the gas will take,a ignition that will burn anything, and having the carbs synched perfect.