Mythbuster: continuing project thread of my 1303 '75

[70Turbobug]

Looks like you´ve been quite busy Wally! Nice upgrades! The catch tank is a wise decision imho especially for a turbo car.Highspeed corners or 250+Km/h down "Pflanzgarten" will show if the spoiler works well or not

[Wally]

You have still crazy ideas about attainable speeds with a beetle there Mark!
Your way, way off... ;-)

[70Turbobug]

Originally Posted by Wally

You have still crazy ideas about attainable speeds with a beetle there Mark!
Your way, way off... ;-)

LOL ! I know..and your still too conservative - so the truth lies somewhere in the middle I was just kidding about the 250+ of course..
However,you should notice a difference in corner speeds i.e. have more grip in the high speed corners than before the spoiler - if it works properly and produces more down force than drag.I have an interesting PDF file on building race cars and it covers spoilers,diffusors,etc. quite extensively if you´re interested.It´s in German,which isn´t much of a problem for you.

[Wally]

Thanks for the input Rob! Your wing is a little over the top for me, but it confirms my beliefs that it must make a difference if executed in the right way.

Mark, during TouristenFahren, the long straight is closed for the return lane and toll booth, so there really is no actual straigh on the Nordschleife during TF...even though there are a few really fast parts, they all have some degree of bend(s) in them. Still managed 200 km/h last saturday as my digit speedo records max speed.
I was very pleased with that as I never got that fast on a non-straight before and it could very well have to do with the extra safety/stability feeling the 'wing' gave.
The Ring has a lot of long bends, so that would coincide with Rob's experience as well

Hope we see each other at Action again in 2,5 weeks Rob! Undertray and wing will not be there then though as the car will be in full drag-race mode by then

I promise, these will be the last:



A few brits spotted us on the parking and round-about just before the entrance and made this pic

[70Turbobug]

Nice pic in the "caroussel"

[Wally]

After the circuit driving comes the drag racing action at VWAction at Santa Pod raceway

3rd gear burn-out to warm the tires:

to do this


Result was an 11.62 @ 119.8 mph and I drove all the way home again (450km) with it packed with my camping gear.

[judgie]

when i first built my car i had no rear wing and the car felt very odd at speeds over 70mph. i fitted a rice rear wing and it made a very noticable differance to the stabilty in long corners. since fitting the lola rear wing [ which is huge] it has made a huge differance, you notice it above 50mph but it is running a big attack angle and the top plane is almost stalled !
first wing
[img]
untitled by robjudge1313, on Flickr
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lola rear wing
[img]
IMAGE_00089 by robjudge1313, on Flickr
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[Xellex]

haha, congrats! Was this the first time you took the front wheels off the ground?

[Luismj]

Nice pic!!!

[wrenchnride247]

That's great news Wally! That will have some T1 people scratching thier heads about T4's. Love the "wheels up" launch!

[Wally]

Originally Posted by Xellex

haha, congrats! Was this the first time you took the front wheels off the ground?

Yeah, scared the heck out of me as I try to keep the front as heavy as possible for good balance with circuit use: Battery, oil DS tank, waterinj.tank, catch tank, 2 fuel pumps, some steel braces, steel bumper etc etc...
Still, bloody proud of course of a fat track chick doing a wheelie and very happy no flywheels or drivetrain parts were blown

[70Turbobug]

Wow the pig can fly! Congrats Wally! 11,62 for a circuit car is impressive enough,but a wheelie?! Very cool!! AS you correctly stated,the most important thing is that nothing broke.

[Humble]

Wheels up on a circuit car is pretty damn impressive for sure! I would definitely be worried about something breaking but it's good to see everything held together.

Since I got my car dynoed I've been looking at your dyno sheets more. Is your car 381hp/337trq at the wheels or is that corrected flywheel horsepower? I'm going to be adding a water/air intercooler on my setup so I'm wondering how much power I'll pick up. Also what intake temps are you hitting when you're up around 15-20 psi?

[Wally]

Double post

[Wally]

Originally Posted by Humble

Wheels up on a circuit car is pretty damn impressive for sure! I would definitely be worried about something breaking but it's good to see everything held together.

I was actually a worried, as my buddies car did break his transmission and it would have been my only possibility to piggy back to the mainland as his car is (well, was ) a street legal car as well and was towed on an ambulance to the event. The wheelie was after his car already had broken... but I went for it anyway

Since I got my car dynoed I've been looking at your dyno sheets more. Is your car 381hp/337trq at the wheels or is that corrected flywheel horsepower? I'm going to be adding a water/air intercooler on my setup so I'm wondering how much power I'll pick up. Also what intake temps are you hitting when you're up around 15-20 psi?

Yes, that was corrected flywheel hp Coorection for whp is/was about 15%.
IAT not sure exactly, but those are usually pretty low, around 25-30 Celcius ( ~70-80F?).

At Santa Pod I was running a 'little' more boost and a little more timing, so I think I'll revisit the dyno again sometime to see what that was