[968ts2]

Perfect! Thank you, that is what I was looking for.

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[netopyer]

wow, 968 16v turbo is my dream some day.

how is the lag/feel/lowend torque with variocam + gt35r compared to stock car? i am planning ot use Holset hx35, maybe internally wastegated if possible

i also have COP setup waiting to be installed, it was running on it some days ago.

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[968ts2]

There were a few things I did that effect that low end torque while waiting for boost to kick in.


My exhaust and intake valves are 1mm oversized


The intake manifold runners are 16 surrounded by the plenum


The exhaust is coated with swaintechs white lightning from headers, crossover, turbo inlet and down pipe. Stops at catalytic converter


The biggest and difference came with the throttle curve. My e-throttle at 60% is essentially full throttle and I vary the frequency response for different throttle maps.


I only engage variocam in a limited range based on oil temp load and vehicle speed and still tweak those parameters or create new virtual channels trying to smooth torque delivery.


My dream is to get it closer to what the 1m feels like with a twin scroll turbo as it delivers max torque in a flat line from 1400-5500 ( dream )
16 inch from back of valve for those runners I meant

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[ds968]

[quote name="968ts2" post="189573" timestamp="1587588857"]

My dream is to get it closer to what the 1m feels like with a twin scroll turbo as it delivers max torque in a flat line from 1400-5500 ( dream )[/quote]


Pretty much what the Design1Racing 968 superchargers deliver, but of course ( I presume) no way near the level of hp and torque that the turbo likely produces.


Have you dyno- tested it , and if so how much HP & Torque does it generate at various RPMs ? If not tested, what’s your educated estimate the the peak power and torque, and at roughly what rpm level ?

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[968ts2]

I have never dynod the car and have yet to take it on more than test drive runs to tune this or see how this map change works or this particular throttle curve feels etc.


My daily driver is an 08 e60 M5 so long periods come and go when Angela sits in the garage waiting for me to finish something half started. I was never looking to build for a specific number but originally had 450/500/625 three map setup but in all honesty have spent all my time tweaking the 450 map which I havent dynod to know for sure.


It is more torque than the 1m and M5 but no where as fast as the M5 yet. If I had to guess I would put it at 400whp/440tq but my throttle curves still need work to control delivery.


This hobby has kept me married 20 years cause Im always at home in the garage-mahal so unlike some, putting it on a dyno or pushing a top line figure was just never my focus, that will be for the next owner who didnt labor for years to get to this point. I drive like a grandma data logging for reference/comparison chase ideas to make it better etc


I would love to build a supercharged power plant just to swap back and forth, if I had to do it all over again I see now it would have been possible to build the motor/mod the wiring to go either NA/SC/Turbo ... one car with three possible power plants.

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[ds968]

Impressive, to say the least .. and talent aside, that kind of determination and patience is mind-numbing to me ..

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[968ts2]

Thanks, true story. ....


I learned body work because I wrecked my 360d my M5 into a guard rail leaving a bar in Miami getting on to 95 because I wanted to prove to a Honda on my ass that he had no idea who he was dealing with. I made my punishment driving it back home 688 miles whilst getting laughed at by everyone who passed and deciding that if I wanted to be a jack ass on the road I better learn bodywork. Took me a year and a half to get her back on the road. Lesson learned, I no longer try to prove anything to anyone but the jack ass in the mirror.


360d my M5 I meant

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[netopyer]

wow,

is there any chance to get  photos of your engine bay?

my idea is to use  ''ultraspool' turbo - very popular turbo on 951 now,  or holse, and prefer drivability and torque range than max power. 450-500 crank HP must be enough

by those 60 percent, you meant that  on 60 percent of the pedal, e-throttle is open fully already?

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[PoshGG]

Hello from Atlanta as well.  Hope to see you around.  I'm estimating there are about 4 968s in the metro area.

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[968ts2]

Hey from Atlanta as well, I will get some pics hosted in one of my Linux vms soon, just need to organize ( scale down and rename and host). I have them in mega which is kinda cumbersome getting mega links individually. I am a code whore during the day ( software dev ) and currently kinda swamped.


The 60% throttle meant that there is pedal position 0-100% and what percent the throttle is actually opened. For actual throttle idle control is 0-8% so a table maps the two at specific rom points. So say pulling off in traffic I may pedal 10% but taking into account idle percentage the two are never one to one. Then throttle map is not linear then as acceleration at 30% actual throttle is closer to 50% pedal. So then 50-100% pedal has to smoothe power delivery with the remaining 30% actual throttle to make 60% actual. Then say I wanted to change the profile for a more spirited feel, another map could allow say 75% actual and deliver it slightly different. Hope that makes sense. Started conservative and trying to dial that in then increase / tune on another map etc.


The infinity really lets you control every aspect of throttle, traction control, shift cut, wall wetting, etc.


Again, did I understand any of this prior to starting this project.....not at all. A lot of work but too late to turn back now. Figured the experience will benefit down the road.

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[netopyer]

DevOps here

i am kinda familiar with maps and hexdumps in car ecu. most of OEM ecus have million adjustments done when transiting  pedal position to e-throttle position, which is an advantage in the end. 

So , throttle and pedal are not linear, because  there is a range reserved for idle control , also  do you use multiple overall map sets/profiles  changed while driving?

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[968ts2]

DevOps, nice Azure, Aws or on prem? There is a 0-5v input for a 12 position switch that will change any combination of maps from lambda, spark, throttle, ve and traction control sensitivity ( slip targets ). I basically do 3 groups of 4 map combinations.


I am going thru dme relays more than I would expect. Makes it harder cause a weak dme on one occasion I misread as it showed in data logging as lean condition in abrupt throttle changes. The dme was cycling the fuel pump relay but the car still ran albeit poorly just out of the blue and with all the changes Ill make between sessions I would attribute it to something I changed recently. Most of the time the simple answer is the right one, the symptoms are what makes it seem complicated.

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[Velocity]

DevOps, nice Azure, Aws or on prem? There is a 0-5v input for a 12 position switch that will change any combination of maps from lambda, spark, throttle, ve and traction control sensitivity ( slip targets ). I basically do 3 groups of 4 map combinations.


I am going thru dme relays more than I would expect. Makes it harder cause a weak dme on one occasion I misread as it showed in data logging as lean condition in abrupt throttle changes. The dme was cycling the fuel pump relay but the car still ran albeit poorly just out of the blue and with all the changes Ill make between sessions I would attribute it to something I changed recently. Most of the time the simple answer is the right one, the symptoms are what makes it seem complicated.

 

If using the stock 968 DME relay, there is a solid state direct replacement that might fare better than what you've used so far.   See http://www.ftech9.com/new-products/993-ssr-pp for more details.

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[968ts2]

I saw that on a search and wondered if it would be a better solution, thanks for the tip, I am going to try it as a replacement. I also noticed the one I had was the 944 part number and not the 993 version so was on the fence about trying the solid state one. But logically it does make more sense. The coil on my current won has infinite resistance unless I smack on it it will show 2 million ohms. Thats gotta draw a lot of current. Thanks again.

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[netopyer]

DevOps, nice Azure, Aws or on prem? There is a 0-5v input for a 12 position switch that will change any combination of maps from lambda, spark, throttle, ve and traction control sensitivity ( slip targets ). I basically do 3 groups of 4 map combinations.


I am going thru dme relays more than I would expect. Makes it harder cause a weak dme on one occasion I misread as it showed in data logging as lean condition in abrupt throttle changes. The dme was cycling the fuel pump relay but the car still ran albeit poorly just out of the blue and with all the changes Ill make between sessions I would attribute it to something I changed recently. Most of the time the simple answer is the right one, the symptoms are what makes it seem complicated.

at IBM,  azure and everything else is our enemy

having DME not solid state makes no sense to me, at your level of modification. at least, you  can  focus on something else when  chasing a problem

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[968ts2]

Funny you should say that, I just dropped my azure account after two years cause it was a waste of money. I also dropped running exchange server after 15 years and several db rebuilds/active directory restorations in favor of postfix/dovecot/opendkim running on ubuntu19.x+. Updated to 20.04 using my phone and a terminus.

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[netopyer]

We are working exclusively on ibm cloud, which is a native option for us , of course.

ubuntu is great, been running it  on every server/workstation machine in the past.

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[Waylander]

We use AWS, dont like it much

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[968ts2]

I lost a lot of money investing in ASPs around 2001-2002 and was frankly surprised that if you call it a cloud 18 years later, companies had confidence in placing their proprietary anything on someone elses infrastructure. But hey maybe Im just getting too old.

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[Waylander]

No your not and I totally agree, your control and security is now in someone elses hands

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