Outlaw Opel Omega STW, world's fastest megasquirted car ?

General talk about successes. See older information on MSRUNS forum.

Re: Outlaw Opel Omega STW, world's fastest megasquirted car

Postby paw » Wed May 24, 2017 11:04 pm

R100RT wrote:Very nice workmanship on your manifold plumbing - I didn't notice if you mentioned what material spec you went with?
I prefer 321SS for high heat zones (Burns has good stock on mandrel bends most sizes & doesn't break the bank). As you most likely know, if using lighter gauge, lower grades can suffer from the dreaded "intergranular" corrosion issues and turning into fragments.
Looking forward to following your successes


Thanks!
Honestly, I'm not sure about the actual specs on the header material, I have been involved with the EFI and the electrics
Yes of course we are aware that turbo headers need thicker wall on the headers, ours are 0.1" wall

First turbo tests were done last weekend, my "random-fuel map" was very close, at least up to about 8PSI boost. No boost control on yet, let's get the mapping sorted first.

Lo-cost turbo intake duct :D
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Ready for the National Champs season opener this coming weekend
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Re: Outlaw Opel Omega STW, world's fastest megasquirted car

Postby paw » Thu Jul 06, 2017 3:22 pm

Last week was the European Champs event along with the National Champs in Alastaro, Finland

Literally minutes before heading to the event we added the Turbo Staging feature. No SSR's controlling the transbrake solenoid, just simply the popular IRLZ44N FET. Worked just fine. Seems that the TB solenoid is not fast enough so we have to add a bit of linelocked brake to limit the bump. The first Turbo Staging settings were default 0.050 and 2 bumps. No difference when we changed to 0.035 and 1 bump. Both times did one giant leap from prestage to stage.

Anyway, run #7 (if I remember correct) with the new turbo setup netted a nice 7.621sec ET, keeping in mind the class limit of 7.600sec. Without any dyno time we were surprised how quickly we got a decent set up. And with only 1.2BAR boost on the 7.621sec run, about 0.2BAR lower than on a comparable run with the centrifugal supercharger from last year.

Here's a videoclip of the 7.6sec run and turbo staging : https://youtu.be/piIF7VA1zVY
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Re: Outlaw Opel Omega STW, world's fastest megasquirted car

Postby nathaninwa » Thu Jul 06, 2017 5:24 pm

Nice work, and great looking car/setup
Volvo 940, 2jzgte, MS3Pro, 815/692 @ 27psi.
240z, LS3 MS3pro/micro I/O 8.53@168
86 454/4l80e, ms3pro/micro. Tow rig
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Re: Outlaw Opel Omega STW, world's fastest megasquirted car

Postby paw » Thu Jul 20, 2017 4:00 am

Linelocked rear brake added to the turbo staging feature. Bump test video with about 600PSI of brake pressure. Yes the garage floor is slippery :D

https://cam67.1g.fi/kuvat/sometime+raci ... test_3.mp4
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Re: Outlaw Opel Omega STW, world's fastest megasquirted car

Postby jsmcortina » Thu Jul 20, 2017 1:43 pm

Can you soften up those bumps at all? Use smaller mini-steps and/or a faster solenoid?

James
I can supply, repair or upgrade Megasquirts in UK. http://www.jamesmurrayengineering.co.uk

My Success story: viewtopic.php?f=104&t=34277
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Re: Outlaw Opel Omega STW, world's fastest megasquirted car

Postby paw » Fri Jul 21, 2017 12:53 am

jsmcortina wrote:Can you soften up those bumps at all? Use smaller mini-steps and/or a faster solenoid?

James


James,
This weekend is a drag racing event so we'll know for real how the linelocked brake helps those bumps. Currently the bump release time is 0.035 (# of moves 1) and we haven't tried a lower value yet. If a lower value doesn't help we have to look for a faster TB solenoid or maybe bump the solenoid voltage up to 16V...
Challenges for the bump (besides the TB solenoid) :
- Torque converter is already quite "tight" at launch rpm
- 531ci BBC at about 1bar launch boost has TORQUE... :)
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Re: Outlaw Opel Omega STW, world's fastest megasquirted car

Postby jsmcortina » Fri Jul 21, 2017 2:52 am

I've not tried the bump personally yet, but I know others have used short mini-bumps to get a smoother effect.

If you have time in the workshop can you try smaller times?

http://www.msextra.com/forums/viewtopic.php?f=125&t=50135#p365614

James
I can supply, repair or upgrade Megasquirts in UK. http://www.jamesmurrayengineering.co.uk

My Success story: viewtopic.php?f=104&t=34277
MSEXTRA documentation at: http://www.msextra.com/doc/index.html
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Re: Outlaw Opel Omega STW, world's fastest megasquirted car

Postby nathaninwa » Fri Jul 21, 2017 7:21 pm

I'm running a Glide and have been to 4400 on a double dump billet brake. If I tickle the prestage beam, .025 will just light, then shut off the stage light, had to double bump at time. Went back to .035 for a solid state beam, but will still turn off on the rock motion. I too might try the linelock tied into the brake to calm it down some, or try like .020 and command two steps
Volvo 940, 2jzgte, MS3Pro, 815/692 @ 27psi.
240z, LS3 MS3pro/micro I/O 8.53@168
86 454/4l80e, ms3pro/micro. Tow rig
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Re: Outlaw Opel Omega STW, world's fastest megasquirted car

Postby jsmcortina » Sat Jul 22, 2017 4:18 am

If your solenoid is fast enough, then running a number of small steps should give smoother operation instead of a big jump.

James
I can supply, repair or upgrade Megasquirts in UK. http://www.jamesmurrayengineering.co.uk

My Success story: viewtopic.php?f=104&t=34277
MSEXTRA documentation at: http://www.msextra.com/doc/index.html
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Re: Outlaw Opel Omega STW, world's fastest megasquirted car

Postby paw » Thu Jul 27, 2017 2:23 am

Hey guys,
Last weekend's event was the first actual bump test with linelock and yes it calmed down the rocking motion.

Here are two clips, unfortunately not from the best angle :
https://cam67.1g.fi/kuvat/sometime+raci ... lock_1.mp4
https://cam67.1g.fi/kuvat/sometime+raci ... lock_2.mp4

- The Holley EFI users have done a bump system succesfully using a PWM output, a long thread is at : http://www.yellowbullet.com/forum/showt ... p?t=598342
- Some used a PWM output along with a timed output to pass through the PWM for a set amount of time
- The good thing with a PWM table is it can be set according to launch rpm (higher RPM --> higher PWM duty%) which makes bump distance more consistent at varying launch RPM

Maybe we'll try something similar next, a string of very short pulses, like 10pcs or so

Gathering from the forum thread, here are some PWM examples translated to TB ON/OFF times :
100Hz & 72% duty cycle = 0.0072s transbrake ON , 0.0028s transbrake OFF (released)
20Hz & 70% duty cycle = 0.035s transbrake ON , 0.015s transbrake OFF (released)
15Hz & 70% duty cycle = 0.046s transbrake ON , 0.02s transbrake OFF (released)

One guy uses 100Hz & 72% duty cycle = 0.0072s transbrake ON , 0.0028s transbrake OFF (released) for 0.12sec time, making the number of pulses 12

Here's a nice example of a smooth working system : https://www.youtube.com/watch?v=szgPA9XN2VQ
Last edited by paw on Thu Aug 10, 2017 10:58 pm, edited 1 time in total.
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Re: Outlaw Opel Omega STW, world's fastest megasquirted car

Postby paw » Thu Aug 10, 2017 10:55 pm

A much better bump test clip from yesterday : https://cam67.1g.fi/kuvat/sometime+raci ... test01.mp4

0.015sec release time / 0.060sec on time , 5 bumps

This weekend is a national drag racing event so we'll see how the bump behaves on track, but it's looking promising
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Re: Outlaw Opel Omega STW, world's fastest megasquirted car

Postby paw » Sun Sep 03, 2017 11:16 pm

So, the 2017 season is over. Had a bit of a mishap, last fridays first qualifying run netted a 7.491sec ET @ 292.45KPH (181.6MPH). New record but at the same time out of the race, went under the Pro Street class limit of 7.600secs. Sh*t. Leaned fuel maps worked better and with the hall trigger sensor swapped to a VR sensor, no trigger issues.

After the finals there was an exhibition-type nightrace, here's a 7.6sec run from that : https://cam67.1g.fi/kuvat/dragracing/2017/ALASTARO_FINALS_NIGHTRACE/opel_nightrace01.mp4

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Re: Outlaw Opel Omega STW, world's fastest megasquirted car

Postby nathaninwa » Mon Sep 04, 2017 2:22 pm

Nicely don't sir!

I'm at two short bumps and seems to do good for me. How did your multiple setup work?
Volvo 940, 2jzgte, MS3Pro, 815/692 @ 27psi.
240z, LS3 MS3pro/micro I/O 8.53@168
86 454/4l80e, ms3pro/micro. Tow rig
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Re: Outlaw Opel Omega STW, world's fastest megasquirted car

Postby paw » Mon Sep 04, 2017 10:04 pm

nathaninwa wrote:Nicely don't sir!

I'm at two short bumps and seems to do good for me. How did your multiple setup work?


Thanks Nathan!
We went down to 2 bumps as well, it's ok. Could be better though. Planning to use an oscilloscope and a highspeed-camera to film the TB solenoid action to see the true response time from release to closed. Would give us an idea how fast the solenoid really closes and how much (or little) changing the release time really affects the total time from open to close.
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Re: Outlaw Opel Omega STW, world's fastest megasquirted car

Postby paw » Fri Sep 08, 2017 12:30 pm

Rear tires saying ouch (from last weekend) :
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