+ 1 we need more Randy ;-)

 

Thanks man! And I never go beyond 4th gear in this vid!!!

I'll be posting up some Big pulls, all the way thru 6th, in January.
In Mexico of course.

 

lol in January! I'm gonna stop hijacking K24Fs thread now lol!

 

Following...

The lonely long pull did (2 persons in) 100-200/300 in 5,5' /19,2', fully logged of course.
Todd saw the logs and in despite all looks perfect, very consistent timing, 65% IDC, correct EGT and lambda, etc... he told me to lower slightly the boost, because I can not be sure of the constant quality of my pumpgas, nor always running Torco...
The logs show a good regulation @1.35Bar with very rare spikes @1,38-40, absolutely no more.
So, tomorrow morning I will lower my actuators setting to obtain a regulated 1,30Bar boost, and relog. (needs to preset @0,9Bar according to my tests)
We will check and improve if needed and the first step will be done: the optimal pumpgas file.

As my IDC @1,4Bar (absolute peak) and 6500rpm doesn't exceed 65% there is room for enrichment so I believe I will try a (very) conservative E85 file with moderate boost, to see how does it work...
I wonder if a moderate E85 tuning would be better versus an optimal pumpgas tuning? In terms of both reliability and power.

Of course <4' 100-200kph times are astonishing, but in (my) real life, repetitive 5' and a bullet proof engine allowing long pulls in Germany with a common gas is a good deal, I'm pretty scared to blow up my engine a second time!

Cheers, P.

 

Sounding good P!!

Maybe when I drive back from FVD we can hook up if you are on the way back and you can show me your car and vice versa?

 

Why not? But I really have only very little free time to play with my car because of my business and family, let me know when you will be on the road...

 

It will be sometime in the new year P. possibly January or Feb.

 

Hi P,
nice to hear things are coming together. How does this compare in subjective acceleration with your modded vtgs on pumpgas? I did 6.2s 100-200km/h on pumpgas with my modded vtgs, does 5.5s feel that much faster? Is that the best you expect on pumpgas? It's a really fast time but I'm not sure it's worth me spending mucho dinero to go from 6.2 to 5.5s.

 

Hi Boggy,
The accel is more on the high revs than in the low, for example the best times are achieved with 3rd+4rth gear with Alphas instead of only 4rth with VTGs.
It is more exciting at driving.
Notice 5,5' was with 2 persons in and a 1500km engine, no doubt 5,2' is achievable alone. (6,1' only 4rth when logging, 2 persons in as well)
I agree my setup in not the best bang for the buck, especially because I don't run race gas nor watermeth...
But I know in the performance research the last seconds and horsepower are the more expensive.
I achieved 5,3' with my VTGs and Torco with Todd's big boost file, but while the low end and midrange were strong the top end was "flat", it was a cheaper way for quick times but, out of times, the engine feeling with Alphas is far more agressive and "sporty".
The engine feels less "elastic" but more strong, response is harder, IMO fits better with the idea of an high perfs machine.

P.

 

So your happier now in the psychological sense rather than the mechanical/physical sense.

The feeling on the foot is more like a lambo V12 rather than a smaller 3.6tt with little turbos?

 

I was about to ask you the same thing about vtg's vs alphas. Do you think that the 3.8 kit would improve your previous vtg setup?

I believe that vtg makes more torque at sooner rpm and for a wider range, that is why you feel flat higher rpm. The same feeling of the new diesel engines also with vtg technology.

 

Yes the delivery is much more linear than punchy!

 

Very nice description P. It seems to running very well.

 

I just let the car in the garage guys,
New logs are done, boost regulation @1,30Bar with spikes @1,35. Several short pulls and only one long pull: incredibly we did at 100-200/300 5,4' and 18,8'! (VBox times).
I believe the more I run it the better it will perform. (breakin in)
I even did 5,2' at 100-200 alone in the car, very nice for me.

To answer the questions: IMO 3,8 is not necessary with the VTGs as they already choke at top end with the 3,6, I mean it is not worst of course, even better, but only by low and mid range (IMO I repeat).

The engine response is really "harder" and more impressive with the Alphas, the engine pulls more and more until you let the throttle.

 

The difference between VTGs and Alphas is real and significant. Your motor is operating much more efficiently. This is only at 1.3 bar AND PUMP GAS with PUMP GAS TIMING. Transforms the vtg puppy into a beast. VTGs are real duds up top. VTGs do have quick response down low but when your in second gear and nail it, alphas will outperform VTGs if you can hold the tires. Having had both, VTGs are minor league.