Your previous car wasn't 9.4:1, was it?


That is highly unreliable. You should know that. Obviously metal is a sign of issues, but it does not always appear on the plug. In fact, most "lightly" pinging motors will not show on the plugs.

This reminds me of the guys at the gym with their circular reasoning. "This suppliment works because I'm huge." "But how do you know it works?" "Because I'm huge." "Have you had your blood checked?" "Dude, have you seen me? I'm huge." Solid.

That said, Tony has provided some good emperical evidence. Anyone who is in business should have no problem verifying their claims. I don't think that he does.

You do realize how much looser of an engine the 2JZ GTE is, right? I built my first of 3 Supras in 1999.

I submit to you that this tuning to 1.3 bar is doing exactly that. (Additionally, aftermarket ECUs do not perform FFTs. Intead, they simply look at the amplitude of the piezo -- a woefully inadequate measure of knock)

I think we're more in agreement than disagreement. I also think that dialogs like this thread are healthy for the community as it continues to learn and grow.

 

Congrats Ari. We should see you at VCR one day when my car is done. Enjoy in good health. Very interesting illustrations by Tony@EPL also.

 

For the record I am taking it super easy until the clutch breaks in and I can get the car to GIAC for dyno tuning on both pump and race gas.

I am not sure which turbos I have but will find out. From the sound of it, they are not the alpha series.

Someone here asked why Porsche doesn't pump up the boost. The answer is that they have. The 996 Came with 420-470+ hp on the same identical engine depending on options and model.

The 997TT has essentially the same engine as the 996 TT, with admittedly upgraded fueling. That's essentially what the aftermarket is doing with upgraded MAF and injectors. It runs 1.2 BAR and puts out about 480 HP through the stock cats and mufflers. The same engine puts out 530 HP in GT2 form with bigger turbos and more flow (if not boost).

Most importantly, Porsche has to keep a lot of power out for marketing reasons. What would they do for the next model if they came out with a 600 HP TT?

 

Counselor, I respectfully submit People's Exhibit A, ttboost's timing log at 1.3+ bar on PUMP gas with factory ECU boost control on K24/18gs:

Doesn't look like he's riding the knock sensor to me.

 

Hahaha, here here! That's a very cool graph. How did you get that info?

Of course, this is ancedotal info and one run at that. Additionally, as I previously mentioned, the ECU may be missing the knock frequency due to changed harmonics.

That said, repeated graphs like that make it more likely than not that the car isn't "riding the knock." Thanks for sharing that.

And I'd trade my car for yours in a second. Beautiful.

 

yes, unless you want Tr30R's at $8K a pop

 

Where I get all of my good tech info... I stole it from Tony. It was part of the datalogging set he posted when he posted the results of Mike's build:
https://www.6speedonline.com/forums/...llow-soon.html
specifically, here:
https://www.6speedonline.com/forums/2359126-post54.html

Agreed, and good point regarding altered drivetrain components altering harmonics. You made me rethink stiffer engine mounts.

Check with Tony, but I think these results were very repeatable during tuning of this car.

I'm a big fan of your car as well. I may just take you up on that offer. Welcome aboard 6speed, counselor!

 

That is an interesting graph. Do you know if ttboost was running meth/injection when this was data logged?

 

Yes he was meth...the car was running nearly race gas timing at the time.

With a proper tune, the same level of safety can be archived on pump gas.

 

. Thanks Mike!

Timing retard a parameter that can not be logged wit Duremetic. This data was pulled from our proprietary data logging tool that sampled at almost 8x's the speed of commercially available tools.

 

Congrats, Ari! Subscribed to thread. I look forward to hearing more about the evolution of your car... I may follow in your footsteps at some point soon... Working other areas of the car right now but once I safely build out all the supporting components, I may go back for some more power (and I'm seriously considering some of the 28's for their low end, and linear, pull)...

 

Ari, Please find out if you have the full Tial Gt28 or the GT28 with k16 hot side. This helps us understand your results better.

 

Wow..this thread got pretty off topic..anyway Ari, hit me up and let's do some runs soon!

 

Yep! Spoke to Dan today. We're going to forward with the custom tuning at GIAC and circle back to review the clutch noise. Sounds like a TO bearing to me...

I will say the car totally shrieks. Punch it from any speed while cruising and the spool is totally unbelievable. Lots of boost even in first gear (which is gone is a split second). Anyone that owns a TT knows that the engine outruns the tach in first (gives the impression that you hit the rev limiter at 6K indicated). Well I swear my car hits the rev limiter at closer to 5500... and it has a 7,000 rev limit. It revs that fast!

On the freeway, forget about it. Totally flexible in terms of low end boost. Sixth gear is a genuine passing gear now. Downshift a couple of cogs and it's a scream.

I will say, whatever Dan said makes a lot sense now. You really do want a car with fast spool and good torque curve for the street. Top end power is secondary, not that it's lacking.

I can't wait to try the race gas file!

 

Hey Ari,
Hey guys,

Just got back in town and saw that you were all done. You will love the new race tune! If you thought there was a SC V8 in there now...wait till you feel the race file! I have had this set-up for almost two years now (since we first started playing with our own 700 kit at Speed Gallery) and it has been great at 1.4 bar pump in all weather. Looks like we are pretty similar in set-up now. I did get inter-coolers on GIAC and Dan's recommendation and the car runs more consistently in hot valley weather. By the way they are the Tial Alpha series GT-28rs using k-16 housings, ball bearing water cooled.

I think with more fuel pump power there is even more in store. The best part is that Garrett at GIAC has the same set-up but non-ball bearing. He has played around with the tune and perfected it more times than I have changed exhausts!

Enjoy safely and let me know when you dyno the new tune.

Sam