In my experience, 30decC ambient - after 20-25min track session the entire intake tract is heat soaked - including alu y-pipe, throttle body and intake manifolds - and you would see boost pullback even in second gear (unless on race fuel). Worse for street use - unless you alternate above 120km/h to ensure enough flow for heat transfer out of intercoolers themselves.

 

I have a very good IC and it has made a huge difference lapping..also at Mosport, first 10 min... I will drive by a Scuderia like it broke then every 5 min or so I get slower and at 25+ min it's a struggle..heat soak everything make sense.

On warm days i have seen on the speedo 266 km/h...GPS reads 255..a 10 cup will hit GPS 247.

 

TurboS - Lovely car BTW and I took a peek at some of your in car vids, very impressive
It is great that we have a "C" VTG GT2 on here, I presume your car has their much lauded 68mm VTGs ? Do you have any idea what hp claims they are making for the engine package in your car ?

Is this the case, is it accurate to say at Mosport you are accelerating from~120kph to 260kph in 1060 meters ? did someone mention it is uphill, what sort of slope ?

 

Its a pretty steep uphill, no idea on slope.... around 80 to 90 kph by the time we are full throttle.

What is a C ?

 

It is (IMHO) US (FL) guys who do great stuff on turbo Ps and have "motorsport" in their name. I'm particularly interested in their modded fuel injection rails and recent re-design of intake runners.

 

Starts at 295 Meters and rises to 327 Meters elevation.

 

Debunking the blurb, pseudo science, and general hot air which is perpepuated by the many aftermarket intercooler makers is in full flow now with many more of us punters being educated on the subject.

I still read about flow versus cooling with people (vendors of high flow but proven low cooling designs) implying that you can't have high flow with high cooling since the very act of filling the core with turbulators and cooling metal will slow up the flow and WILL limit the power and if you want a powerful turbo car you need to be able to flow the boosted air and not restrict it through a restrictive intercooler.

This has been gospel by many vendors and the theory really does make sense on the surface.

Well is it fair to say that the Mission 400 car has put this one to bed ?

The exact same Secan's which RS Tuning put on their 626hp 997 turbo are used on their 1055hp 997 turbo........ nuff said ?

 

Thanks!

Car has the stock turbos, I believe it's only chipped. Altering the exhaust made an appreciable difference in performance. Next year free flowing cats, GT2 RS intercoolers, more suspension bits.

Friend sent me a link to his 3d plot of Mosport.

http://farm7.static.flickr.com/6031/...4d775201_o.gif

 

Nope, clearly the said car would have made 1500+hp (dynojet, of course) with a "high flow" core....once.

 

Not sure what you mean Toby. There is no information whatsoever to infer or generalize.

If they re-used stock size secan cores (same as in 600hp kits) they must run ***very*** high boost. It's about the only conclusion we can make untill more details are published.

I'm struggling to imagine they would take such built seriously.... Pressure drop across the constriction is proportional to the square of the flow rate. So if they doubled the engine's VE as you imply, the core's are undersized. Is it a "study case" or an off-season boredom project ?

We dont know how they (coolers) are ment to perform, what programming had been done (you mentioned they've built it to run for few hours) etc. Untill then the snipplets you've given point to an amazing achievement considering stock shell (no space frame) and stock cooling.

Note that at those speeds aero, weight distribution and cooling are equally important. (power needed increases at the cube of velocity and is linear in frontal area x Cd; heat robbing the power)

 

Errr..... how about same intercoolers which are used on 600hp Porsche turbo flow well enough to produce 1055hp and break world production car speed record ?
It is written in the original blurb that they run 1.5bar - this is likely true, higher than this is not likely for the amount of time this engine will run under these massive loads.

I think you are struggling a bit, you are spouting the same pseudo science which is prolific from tuners who talk the talk - they have specced an engine, built it and tested it on the engine dyno and it has broken the record so it does what they wanted it to do despite the pseudo science apparently saying it shouldn't....

How many hours do you think a real 1055hp 3.9 twin turbo Mezger engine should be able to run at full load ? Where is your information from ?

You are talking about it, they have done it including building the body to be aerodynamic enough and strong enough to achieve the goal - not sure what the point is ?

 

Cool Would wait for the publication or press release - do you happen to have a source ?

Sorry for being a bit critical and involved with numbers - must be my day job You do remember I'm one of their customers

 

I'm hoping someone will post the story once the mag comes out. TBH I don't think there will be much detail about exact engine spec in there....

I was given a lesson by RS many years ago (OK this is not the first lesson when I arrived in my "500hp" 993 turbo and got taken out in their "500hp" 993 turbo and was told "zees eez five hundred horse power" ) and basically they do not like like to chew the fat on parts with customers, one can tell them as much detail about what various components "should" do and how they "should" perform, quote air flow rates for turbo compressors and A/Rs at them all day long and all they will say is "vee weel test eet on zee dyno"....... cuts right through all the chat and not much fun for those of us who like to pontificate endlessly

From what I understand this 1055hp engine has massive turbos which can flow the required amount air at 1.5bar and at the right "coolable"(by the Secans) temperatures..... like I said they said it misfires and runs horribly below 80kph so it aint no street engine, it was built for the job in hand

 

To get the specs you need to own the team and the design. Incidently they have reputation from 993 LM days of being very secretive - there are few pit anecdotes around - but I can assure you they do the math (and are very commercially aware).

 

I spent many hours hanging round their shop unsupervised and no-one seemed to mind (rather there was no-one around) as I thumbed through page after page of technical schematics, some with patent numbers for all sorts of componentry from special resonating airboxes to valve profiles....