Mythbuster: continuing project thread of my 1303 '75

[Humble]

One solution is to have a large rear wing like mine but make it removable. I can unbolt the wing and stanchions from the back of the car if I need to. It only leaves the feet of the stanchions on the car, you may have seen this on "ricer" cars. A smaller wing might fit up front or in the back seat for transport.

[Gerrelt]

You could also try to make the ducktail spoler you allready have more effective.

In this autospeed article they talk about the vortex generators of the Mitsubishi Evo: Blowing the Vortex part 2
(a quote: "The longer the arrow, the faster the airspeed." ..inside keversite joke)

They talk a lot about less drag in the article, but I think these vortex generators are also there to direct more air to the rear spoiler, making it more effective.

The new Beetle RSi also does this, but then with a rear window spoiler:



I think its primary function is to direct more airflow to the rear bonnet spoiler.

Just some food for thought.

Edit: I found the Mitsubishi research article, interesting read: Research article

[Wally]

Cool! Tnx for the pic and article. We just need to be carefull not to seem as if we are 'trying' (although a watercooled engine is not trying of course..)...

I think I am pretty close to a decent placement with my old wing I tried a few years ago. Could maybe just be a tiny little bit wider with a bit bigger end plates. Plenty work to do this winter


And yes, good airspeed is always important

[Bug@5speed(US)]

Wally is that wheel or adjusted at engine regardless very impressive and unbelievable.
Congrats
Alex

[Wally]

Thanks; thats corrected to flywheel-hp. A healthy totally stock 1584cc T1 with just cheap header exhaust made 55 hp and another stock 1600 with electronic ignition made 52hp, so the dyno seemed very well calibrated.
I think it turned out to be about 15% correction iirc, so its about 400 RWHP for you guys ;-)

[NO_H2O]

Well done Wally.

[70Turbobug]

Wow! 564NM!! It seems the new cam did make a difference.300NM at around 3600rpm! I bet it pulls like an elephant on crack....
Well done Wally!!

[judgie]

is the small dip at 4000rpm the cam coming on? my n/a engine has the same small dip at 4000rpm as it comes on cam. very good numbers and i hope we can match your numbers with our new engine.

[Wally]

Originally Posted by judgie

is the small dip at 4000rpm the cam coming on?

Calling that a dip or even a small dip is somewhat eggagurated perhaps, but I think I understand the spot you mean.
But no, thats not the 'cam coming on' imo. Cam comes on much sooner then that, as does boost. I'am sure I can tune that out if I wanted to, but it would be for visual pleasure only. Its not like you feel that minute change in rising rate hp-climbing

I think the engine is now 'perfect'. Early super high torque and very high hp when you step on it some more. It does everything you throw at it. I wouldn;t know what to change or what would make it better. It also picks up from 1200 rpm onwards in 3rd gear (mine is a long one too) crawling through town.
So, I was thinking of selling the engine and all ancillaries that make it work (for way less then the parts cost alone) to finance my new '36hp Challenge' -love and I would also love to see the Apfelbeck-project through someday.
Not sure if there is a demand though.

[70Turbobug]

So you´re selling the engine now that you´ve reached your goal,do I understand that correctly? Although building a Challenge motor is a ton of fun,I think you would regret selling the T4 because it does do everything! It´s reliable and incredibly fast.Besides,if Thorsten actually does make a type 4 version of his heads,which he will it seems,I think you could unlock even more horsepower.....just to scare yourself

[Wally]

Originally Posted by 70Turbobug

So you´re selling the engine now that you´ve reached your goal,do I understand that correctly?

Not exactly. More because I want to reach other goals which need an investment and this would be the only way to get there.
I would love to campaign this engine through next years TimeAttack competition because its perfect for it.
Also doing that illusive 10-second 1/4 mile also seems just a matter of going to SantaPod once more.

Besides,if Thorsten actually does make a type 4 version of his heads,which he will it seems,

I don't think it will happen tbh and maybe, just mabe, developing our own T4 OHC heads might even be as rewarding as it is for Thorsten to build his own WBX heads...

[70Turbobug]

I would really like to see the Apfelbeck heads make it to the market! Building an Apfelbeck headed T4 turbo would be really awesome! Hopefully, you'll keep this engine, but it would also be interesting to see what your next project will be.
Now that you've tasted some racing blood I'm sure we will see your next project on track!

[Wally]

Originally Posted by 70Turbobug

I would really like to see the Apfelbeck heads make it to the market!

No, you got it all wrong: its not about taking it to the market. That will even less likely to happen. I/we just want to finish the project and see what it will be like to hear it run at high rpm and see the hp/ltr figure from the dyno.

It will also surely be N/A for a long time because of the hp/ltr testing, but we're getting way ahead of each other here. The end of speculation better stop right here.

[70Turbobug]

Easy Wally....I didn't want to stir anything up or start any speculations so sorry if something got lost in translation.I just said I would like to see them on the market! How am I supposed to know what the intentions are for those heads or that project is? It will be a very interesting developement for sure and I hope you'll share it and post.

[Wally]

Ok, I just didn't want to leave the impression that this is a commercial venture of some sort. It isn't. At all.
Good thing we cleared that up. Sorry likewise if I came on too strong. Its a senstive point obviously ;-)
You know I will post any sh*t here first. It adds a lot to the fun to share.