TB993tt

Anyone remember the Mission 400 project ?

Well it seems it happened last weekend at Papenburg, the lowered roofline 997 with 1055 real hp from its massively turboed 3.9 litre flat six wearing standard Secan intercoolers (with special intake bodywork) broke the official top speed record.
The engine was expected to last 1 or 2 hours but is still running well after 15 hours of full load abuse.

pete95zhn

More pics of the car/engine? Even this one is somehow blurred...

avader906

cutting roofline is in vogue right now (inc. few builds in germany - Albert etc.). do you have any pictures on what they've done with ducting (unless the picture IS the ducting ?

tcsracing1

cutting roofline?

IPguy

do you mean chopping the top....as in what the hot rodders did in the 50s and 60s?

TRAKCAR

Pictures please.

TTurbine

Isnt this Alzens car ?

avader906

this doesnt look like the 996tt Alzen - note the fender scoops. would be interested to see in detail. re roofline - changing the rake / lowering.

https://picasaweb.google.com/1153749...997GT2RNeubau#

TB993tt

This is Alzen's car yes, I believe it was a 997 cup car which got race damaged so they decided with H&R sponsorship to showcase the H&R suspension by running a new speed record on the bumpy Nardo circuit. They cut the roof off and lowered the roofline to make it more aerodynamic. This was in 2006.

Things went quiet, presumably funding issues or maybe racing got in the way but I heard earlier this year that a motor was being built.

The pic above is blown up from a smaller one and is the only one I have. The officially verified record was done at Papenburg not Nardo and the story is being covered exclusively by Autobild magazine in December so presumably lots of pics and detail in there.

What I do know is that testing was done with lower power and 380 to 390kph was fairly easily achieved but going faster than 390kph required quite a lot more hp and the engine was re-configured on the engine dyno to hit the Mission's target....

What is interesting is that this 1000hp car has turbos (conventional KKK not VTG) which are so big and gnarly that the engine misfires when driven below 80kph. The massive side intercooler air intakes and all other bodywork is fabricated in steel to withstand the forces of over 240mph - roll on December's Autobild, I wonder if they timed its acceleration ?

Car in 2006
http://www.evo.co.uk/front_website/g....php?id=211691

TTurbine

http://juergen-alzen-motorsport.de/mission-400-plus/

Its based on a 997 , i beleive they sold they stripped the 996tt and sold it a while back?

They also have a nice video on there website about the car unfortunatly it is in German..

+ a few pictures

avader906

if it's the 997tt - then fender intakes can be seen on the vln car - though in this picture the tub is untouched.

http://www.frozenspeed.com/gallery_t...ing_16/?id=162

the 2006/7 mission 400 pictures are here (note no side air vents but roof lowered)

http://www.rsportscars.com/porsche/2...port/pictures/

http://www.supercars.net/cars/3689.html

TTurbine

Strange , as you can see in the 2nd pic on the website you posted that they have there intercooler intakes similar to the RUF RT12 which are on the top instead using the sides..

Could this mean that this design is more efficient than the side intakes we have on our cars? Hence why the RT12 still uses stock Intercoolers... ?????

http://www.supercars.net/Pics?v=y&s=...on400Plus2.jpg

avader906

I woudnt put it this way. It's a tradeoff between many parameters and you cant be categorical or make statements about efficiency without looking at the flow and the end goal. Good engineering stays secret for a reason short of reverse engineering the flow - just the side skirts can change the side flow dramatically and render the main reason for side intakes invalid. 75% of efficiency comes from internal diffusion - no matter the pickup point - something you will not see from pictures of the body or be able to reconstruct without modelling it.

TB993tt

Ruf goes to around 700PS with 996 turbo engines in the RT12 using big K24 based blowers, the power is rated for the street - you saw the test below with the RT12S against the Cargraphic 997tt with Secan and 678PS, draw you own conclusions about whose hp is working from those numbers (remember same day same track same conditions is the only way with 0-300 times )



Having said that these intakes look very functional but not sure if any of us would like to ruin the beautufl lines of our 997s in this way

avader906

BTW if the goal was highspeed run - Im very surprised they didnt use the water-air intercooler, more suited for the application. They would of been able to position more weight upfront and remove from the rear balancing the car more. Any type of drag - including ones we've mentioned in this thread - would remove a lot of HP at 300kmh+. Same for steel - reinforced CF (be it kevlar or titanium fiber) could of saved some weight. So it optically looks like a cheapish attempt at publicity.....