Time attack beetle

[chug_A_bug]

WOW! humble
looks great... and much easier on the eyes

Chris.

[Wally]

Looking good! Very dedicated.
How is the wing attached?

[judgie]

car looks good. be carfull with how you have that rear wing mounted. thats how i mounted mine on the race car. i had to brace the panel up as it was bending with the forces of the wing. after a while it had got very weak and would flex all over the place as the spot welds started brakeing. i noticed it after a run up the strip and the rear wing had moved about 3 inchs after the vent panel had bent.

[70Turbobug]

Nice build! Love the wheels too!

[Humble]

Here's another pic I forgot to add last night. This was the odometer reading sunday morning



The wing is attached through the vent panel but anchors above and below the vents on the curved body work. I've been able to hang on the wing (I'm 230lbs.) without deforming the body work so I think it's pretty strong. The primary function of the wing is to reduce lift not provide additional down force. Similar, but nicer, wing designs provide up to 1100 lbs. down force at 100mph, but the beetle shape creates almost 1000lbs of lift at the rear axle at the same speed so it's almost a wash.

[Humble]

Did some minor work this weekend painting the trim satin black and got it on the car. It's a minor thing but does make a difference it the way it looks in helping to break up the yellow.






I've had something of a nagging problem for a while but I'm going to had to dal with it sooner than later. Due to the bad location of the wastegate on the cb hide away turbo header (on the #2 primary) it has a bit of a boost creep problem. I thought I could deal with it by setting the wastegate low to 17psi and the most it had ever got to was 25psi (which is still a lot) but I could tune for that. Well I was demonstrating to a friend at the Kelley Park show the benefits of a memory boost gauge and I saw this...



A hair over 30psi is nearly double the wastegate setting so I think it's time for a new turbo header. I've got a couple of shops to go to for this and I might bite the bullet and go for a twin scroll header while I'm at it.

[Wally]

The trim does indeed look good!

I think a front bumper might look even better

Originally Posted by Humble

I've had something of a nagging problem for a while but I'm going to had to deal with it sooner than later. Due to the bad location of the wastegate on the cb hide away turbo header (on the #2 primary) it has a bit of a boost creep problem.

We all agree the waste gate location on the CB header could be better, but I never thought it could give that much boost creep. Sure the wastegate isn't too small and/or not working properly?

2 bar boost! Wow! I did experience this once or twice as well due to operator error (me) and I am always amazed our engines can stand that much cylinder pressure.
Gives confidance too otoh
Good idea on the twin-scroll header, but you'd knew I was gonna say that huh? Do you have a turbo/turbine to suit for that already?

[Humble]

The wastegate is working fine but it may not be big enough as well as being in a bad spot. :P I've gone to extra lengths to make sure the motor can handle the pressure. There are drag bugs currently using a nearly identical setup on race gas and 40+psi so I know it can hold the pressure briefly at least. For TS turbos I've been looking at a slightly smaller borg warner than the one you are using or a similarly sized garret GTX.

As for the front bumper, it's coming together but I need some nice weekend weather to really get some work done. I need to do a lot of fiberglass work on the splitter and the airdam to get them race ready.

[Wally]

Looks brutal! Tnx for the update :-)

[judgie]

have the cut down rear wings made any differance? been thinking of this mod for mine but only if it works. car looks good and great to see it out racing.

[NO_H2O]

Bring on the video.

[Humble]

Here's the video on vimeo, seems like everytime I upload a video to youtube the aduio is out of sync :P

http://vimeo.com/23740404

As far as the rear fenders go, I haven't been able to go fast enough to detect a difference yet. There might be something to be said for drag reduction which should help the 0-60 but it's so violently quick doing that I can't tell if there's a difference or not. 70+ you might see some improvement from drag reduction as well.

[Wally]

Great driving! engine sounds very responsive. Looks like you guys had fun!

[Humble]

Since the Brutes & Beautes event I added a couple clicks to the rear shocks and I think they're about right now at 14/16 stiff. The rear stayed put well enough but more importantly I didn't have tons of weight transfer when getting on the throttle. This event was another one that was between gears for me and I'm starting to think many autoxes will end up that way. I'm really happy with the pro synchros in the tranny now, I would never have been able to fly between 1st and 2nd like this on stock synchros!

Also, I finally figured out the audio problems on youtube... it seems youtube can't handle variable bitrate video or audio and either one messes up playback

http://www.youtube.com/watch?v=9FxWIC6jfPI

[Humble]

Finally found some pics for the Duel at DeAnza event