Razorlab - 2020 LE build thread

[Oodis]

Thanks. At some point the bar will go in, when... is a mystery.



No sliders. Brey Krause side mounts with Macht Schnell bases. I also added about a 1/4" spacer underneath the bases as the OMP seat sat a bit lower than the Sparco did.

Cheers bloke

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[razorlab]

Finally got my 56, not once, but twice today at a BMW club event at Lime Rock. Going down to a smaller front sway bar helped a ton. You can see in the video I am no longer fighting the car in turn 2. Thanks to @garudathree for being a gentleman and giving me a well timed point by on this lap.

 

[Eyelise]

On the Garmin it looks like you got a 56.84 earlier as well. You were smoking. Great weather as well, not too hot, not too cool.

 

[Eyelise]

He is trying to set times with 100% stock power. He has a wagner manifold only but just to keep IAT down.

I have always wondered just how much timing (power) is being pulled as a result of IATs creeping up during a session. I would guess it is significant as apparently our turbo quickly becomes a little "hair dryer". Cooling the intake charge = more power. More power than a car with an OEM manifold for sure. Still, 55s at LRP is sooo fast, I think I saw 107mph on the downhill!!!

FWIW, I'm considering ducting the intake to help with IATs. I believe ducting is on Bryan's list. I hope he gets to it this season. IIRC the graphs of the potential benefit were done over several successive pulls. The benefit over a 20min might be different. Bryan's data logs would be a great help.

 

[razorlab]

FWIW, I'm considering ducting the intake to help with IATs. I believe ducting is on Bryan's list. I hope he gets to it this season. IIRC the graphs of the potential benefit were done over several successive pulls. The benefit over a 20min might be different. Bryan's data logs would be a great help.

I have the Speed Engineering intake duct in this season. So far all the early season track days have been pretty cool so hard to tell if it's doing much yet.

Here is from yesterday. I had some issues with the BM3 app not working so I had to reinstall and forgot to check ambient temp logging but according to weather app history it was around 65F ambient this session.

Also to note, I am back to self tuning the car this season. I have my coolant temp targets set lower as well. I am currently running about 24psi boost out the top of the RPM range.

This is my PB session, after 12 laps:

The PB lap:

Glimpse into the current state of tune:

 

[Eyelise]

Thanks Bryan. Love the data. 12 laps is legit test. The ambient was very low for a track day. The car must have been extra spicy. IATs are rock solid and very low. No signs of heat soak. I am sure you have some logs from last year. Once you get some apples to apples comparisons it would be nice to know if there was any gain. Obviously this won’t be a great indicator of a potential benefit for us stock guys but a benefit would show ducting does something.

 

[decodeddiesel]

First Lime Rock track day of 2024 in the books.

Wish I could have gone with you guys. I'm going to try to make it to Palmer on 5/5.

 

[razorlab]

Another Lime Rock track day. Was day five on the RE71RS and they were heat cycled out but was fun sliding around. Still manage a 57.84, only one second off my PB.

 

[Nocturnal]

How are you liking the Bridgestones?

 

[Eyelise]

Hey Bryan noticed you are running 40% ETOH. Have you noticed the ETOH keeps things cooler than when you run E10. I am planning to ADD E85 to my fuel on track days to shoot for 20% see if it makes a difference without a tune.

 

[razorlab]

Hey Bryan noticed you are running 40% ETOH. Have you noticed the ETOH keeps things cooler than when you run E10. I am planning to ADD E85 to my fuel on track days to shoot for 20% see if it makes a difference without a tune.

E85 helps but not as much as people think, cooling wise. I ran E20-E25 my first season with the supra on the stock tune and it helped keep the ignition timing much more consistent. ECU had no issues with even up to E30.

How are you liking the Bridgestones?

I didn't like them at first but now I like them. At least currently with the cooler spring weather. In the summer they probably turn to mush super fast.

Good steering response and they wear pretty well. They also don't totally fall off a cliff after heat cycling out like the CRS do.

 

[Nocturnal]

I didn't like them at first but now I like them. At least currently with the cooler spring weather. In the summer they probably turn to mush super fast.

Good steering response and they wear pretty well. They also don't totally fall off a cliff after heat cycling out like the CRS do.

Compared to other 200TW, I enjoyed them on my AP1 S2000. I thought they wore well and didn’t seem to fall off heat wise. That said, the S2000 is a good bit lighter so maybe apples/oranges temp wise.

 

[razorlab]

I went back to self tuning my Supra last month and I'm continuing to refine the tune on the car based on all the data I get from my track days.

Currently running E40 on track and datalogs have been clean overall. I'm working on refining the power delivery for track use. I am ramping up boost/torque request like a supercharger as this makes it much more manageable to power out of corners instead of a big torque hit just lighting the rear tires up.

Next step is to work on WGDC control in the upper revs to help the boost continue to climb to redline, and to help it get closer to target.

I managed a PB at Lime Rock a couple weeks ago on this tune, so it's making some jam.

 

[Timmy_Jones]

You’re flying man, I’ve actually watched most of your LR videos. I must have thousands of laps there….in iRacing! Very cool to see it done in the Soup!

 

[razorlab]

Some photos and a video from last weekends event at Pocono Raceway

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