My Caymans S 341BHp and 300Ft/lbs Torque.

My Caymans S 341BHp and 300Ft/lbs Torque.

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TB993tt

2,033 posts

242 months

Sunday 3rd May 2009
quotequote all
Great write up and thanks for sharing...

You refer to "heat soak" a few times so you obviously have an idea of what this means and maybe how it affects even N/A engines ?
Reprogramming the ECU using the "power run" method on a chassis dyno ie do run, change tables and do another run until the highest numbers are obtained can result in these sorts of results, 9M have been churning them out for years.

When Porsche measure the power it is done on a static test bench with the torque being held under load until temperatures stabilise, the torque done this way is always less than the "run up through the revs under a fixed (lower) load" method which happens on a chassis dyno.

If you took you motor out and put it on Porsche's engine dyno and held it under load at ~6000rpm for 30 seconds it still would read 292PS (or torque equiv) at the end of the 30s, what do you think your current set up would read ? would the new timing advance maps stay at their optimum settings or would it all get a little hot and you end up on a much retarded timing map ? probably the latter and your power measurement would not be the 341PS, it would be much less. This is how Porsche measure their power and one of the reasons why many "tuners" particuarly the American ones have these fantastic power increase packages.

This is not to say your new setup isn't good, it sounds awesome and amazing value and a 1 sec redustion 60-100 is well worth having. It is just the actual power measurement in comparing with Porsche's methods which is questionable.

BTW you mention you may have been able to measure higher power if it had been cooler (for IAT presumably ?) surely the dyno corrects for IAT anyway so it makes no difference ?

crolandc

290 posts

197 months

Sunday 3rd May 2009
quotequote all
Killjoy;)

mrdemon

Original Poster:

21,146 posts

266 months

Sunday 3rd May 2009
quotequote all
All very interesting stuff.

I have no idea how Dynos work and I have no real interest in BHp figures.
My car was not dyno tuned the map is an adaptive learning map which matchs my mods.
The lotus Car tuners proves dyno results are pointless with massive Bhp/Ton figures but no fast times to back them up.

But People always ask for them so I did some at my own cost at a non Porsche tuning Dyno rig which is a well know unit in the UK.

All I can do is test my car in every way possable before I had it tuned and then try and do the same tests after.

I have never talked about Porsche figures all I have talked about was what MY car did on the dyno before and after. And my Vbox runs which I need to do again as I have now got a better map. which picks up quicker at lower revs.
So take correction out at the flywheel etc and just show the at the wheels figures these were 240Bhp before and 283Bhp after.

The 1 second faster is a real figure and you can feel it, the other great thing is NO dead spot at 3000Rpm this always bugged me and now the power is just so smooth any where in the range, So driving it just feels much nicer.

But the vbox is the best thing as it just shows the car faster every where, I am trying to learn the graph plotting feature so people will be able to see what times I got in runs like 30-70Mph runs
and all the times inbetween, I have done lots of tests and will do many more, I have never liked Dyno figures but I love vbox speed times as you get to see real on the road gains which is some thing no tuners ever show.


Edited by mrdemon on Sunday 3rd May 10:06

TB993tt

2,033 posts

242 months

Sunday 3rd May 2009
quotequote all
mrdemon said:
All very interesting stuff.

I have no idea how Dynos work and I have no real interest in BHp figures.
The lotus Car tuners proves this with massive Bhp/Ton figures but no fast times to back them up.

All I can do is test my car in every way possable before I had it tuned and then try and do the same tests after.

I have never talked about Porsche figures all I have talked about was what MY car did on the dyno before and after. And my Vbox runs which I need to do again as I have now got a better map. which picks up quicker at lower revs.
So take correction out at the flywheel etc and just show the at the wheels figures these were 240Bhp before and 283Bhp after.

The 1 second faster is a real figure and you can feel it, the other great thing is NO dead spot at 3000Rpm this always bugged me and now the power is just so smooth any where in the range, So driving it just feels much nicer.

But the vbox is the best thing as it just shows the car faster every where, I am trying to learn the graph plotting feature so people will be able to see what times I got in runs like 30-70Mph runs
and all the times inbetween, I have done lots of tests and will do many more, I have never liked Dyno figures but I love vbox speed times as you get to see real on the road gains which is some thing no tuners ever show.
The wheels numbers are subject to the same stuff as I describe above, it is the way the new mapping is done using the dyno "run" as the road load simulation which makes any numbers not compatible with a static load reading as done by Porsche - but like you say, it doesn't matter, your mods sound to have made a nice difference which you can feel and enjoy.

Just to expand on it a bit more, you may well have your 341PS curve on a run up through the bottom 4 gears so in effect the power IS there (and importantly it is there for 90% of your full load driving), it could just be the loads /heat in 5th and 6th which heat stuff up enough to make the ECU drop to a more retarded timing table (with reduction in power)

If you could get some acceleration numbers to higher speeds like 100-200kph it would give an even better picture of your new torque curve when compared to all the published data already out there for stock 295PS cars.
Loads of test data on here:
http://www.einszweidrei.de/

mrdemon

Original Poster:

21,146 posts

266 months

Sunday 3rd May 2009
quotequote all
Calling Surry rolling road and Charlie.

Did you not RR the "Yellow peril" to 360+Bhp ?

I am sure karel used you to test his car which was the 1st one done in the UK.



Edited by mrdemon on Sunday 3rd May 11:18

TB993tt

2,033 posts

242 months

Sunday 3rd May 2009
quotequote all
mrdemon said:
Calling Surry rolling road and Charlie.

Did you not RR the "Yellow peril" to 360+Bhp ?
[/footnote]
Below is how a loaded chassis dyno measurement run should look, not sure but think this is a Maha RR, checkout the warm up runs where there is little loading (bit like most RRs power runs!) then watch the real power measurement run - the thing takes over 1 minute 10s, - I am guessing Surrey RRs isn't in this category ?


http://youtube.com/watch?v=FAKST_z2JX8

Edited by TB993tt on Sunday 3rd May 12:59

DanH

12,287 posts

261 months

Sunday 3rd May 2009
quotequote all
mrdemon said:
DanH said:
Vixpy1 said:
All the shootout data has been deleted from the bottom of the graph, makes me suspicious immiditately.
yes that was my comment on his other thread too. What's going on with that?

The other point is that Manthey and Cargraphic don't seem to think they can get this power with their mods?
That's why I did not go with any of those Porsche tuners :-)

I choose the best person in the world imho to get my map from, He does tuning and engine rebuild of the 996/997 Cup GT cars and has been doing Porsche cars for 16 years, Knows the Porsche ECU better than any one imho.
This is where I can't suspend my disbelief. I just don't believe that the top German tuners would leave that much power on the table if it was actually real and available. Why would they?

Who is this guy that did your mapping?

ZeroH

2,906 posts

190 months

Sunday 3rd May 2009
quotequote all
TB993tt said:
mrdemon said:
Calling Surry rolling road and Charlie.

Did you not RR the "Yellow peril" to 360+Bhp ?
[/footnote]
Below is how a loaded chassis dyno measurement run should look, not sure but think this is a Maha RR, checkout the warm up runs where there is little loading (bit like most RRs power runs!) then watch the real power measurement run - the thing takes over 1 minute 10s, - I am guessing Surrey RRs isn't in this category ?


http://youtube.com/watch?v=FAKST_z2JX8

Edited by TB993tt on Sunday 3rd May 12:59
Interesting to watch that vid - i've been to a couple of RR days and never seen a car loaded in that way... normally its a 3rd gear pull a few times to the redline and back. And with much less cooling that there seems to be here !!

mrdemon

Original Poster:

21,146 posts

266 months

Sunday 3rd May 2009
quotequote all
quote
"I just don't believe that the top German tuners would leave that much power on the table if it was actually real and available. Why would they?

Who is this guy that did your mapping?"
End quote

German tuners can have all the skill in the world but if they don't have Scott Slauson then they cannot get the best out of the ECU imho which is why i choose his system.

Even Scotts software uploads quicker than the factory can do it, he sure does know about Porsche ECU's.

I know nothing about Surry RR . mine was done at Thorney Motor Sport.

As for Charlie @ surry RR I don't think he has tested the yellow car in its current form so I have just been told.


There are many Quotes about Scott here are some good ones.

"Softronic’s owner and tuner Scott Slauson is considered to be the leading authority in Porsche tuning by many. With over 30 years in fuel injection experience, Softronic is the lead company in Porsche race car data checking. Softronic sets the ground for which there is no comparison in automotive technologies"


"Softronic has been doing Porsche Performance for 20+ years. As the former PCA technical advisor and now working with Porsche Motorsports and even well known race teams for data checking and tuning, Scott Slauson brings a convenient, well thought out, and proven form of ECU Tuning to Porsche"

"Softronics was created and is run by Scott Slauson. You may recognize his name from the Porsche Club of America and/or the Panorama magazine. Scott has been on the PCA technical committee since about 2001, specializing and sharing his expertise on the 986, 987 and Carrera GT platforms. Scott has been turning wrenches on Porsches for a long time and is recognized as one of the worlds most qualified experts on Porsche DME software."

I think people are happy with Scotts work :-)

Edited by mrdemon on Sunday 3rd May 15:58

TB993tt

2,033 posts

242 months

Sunday 3rd May 2009
quotequote all
mrdemon
As they say, you are "drinking the kool aid". Thinking that someone in the US with a chassis dyno and the brain the size of a house could know Motronic and its abilities/limitations better than the people who invented it stretches it a little smile

You really need to get your GPS logger fired up and run some numbers. stock 100-200kph is about 14s, if yours has 340 real hp it should come in under 11s (if you look at similar powered/weighted porsche on the site I linked)

ZeroH

2,906 posts

190 months

Sunday 3rd May 2009
quotequote all
TB993tt said:
mrdemon
As they say, you are "drinking the kool aid". Thinking that someone in the US with a chassis dyno and the brain the size of a house could know Motronic and its abilities/limitations better than the people who invented it stretches it a little smile

You really need to get your GPS logger fired up and run some numbers. stock 100-200kph is about 14s, if yours has 340 real hp it should come in under 11s (if you look at similar powered/weighted porsche on the site I linked)
Toby this is exactly what I'm going to do once my car returns from Fearnsport at end of mth. Will do before and after runs, thru the gears and in-gear. Have racechrono software and GPS receiver with this increment set - if you have any idea what the 100-200km/h on a stock 996tt x50 is I'd appreciate it (from magazine tests I believe its a fraction over 9secs but not sure the official time)!!

ZeroH

2,906 posts

190 months

Sunday 3rd May 2009
quotequote all
ZeroH said:
TB993tt said:
mrdemon
As they say, you are "drinking the kool aid". Thinking that someone in the US with a chassis dyno and the brain the size of a house could know Motronic and its abilities/limitations better than the people who invented it stretches it a little smile

You really need to get your GPS logger fired up and run some numbers. stock 100-200kph is about 14s, if yours has 340 real hp it should come in under 11s (if you look at similar powered/weighted porsche on the site I linked)
Toby this is exactly what I'm going to do once my car returns from Fearnsport at end of mth. Will do before and after runs, thru the gears and in-gear. Have racechrono software and GPS receiver with this increment set - if you have any idea what the 100-200km/h on a stock 996tt x50 is I'd appreciate it (from magazine tests I believe its a fraction over 9secs but not sure the official time)!!
Ok no need to respond, I just looked at your link - 9secs dead !!


DanH

12,287 posts

261 months

Sunday 3rd May 2009
quotequote all
mrdemon said:
DanH said:
"I just don't believe that the top German tuners would leave that much power on the table if it was actually real and available. Why would they?

Who is this guy that did your mapping?"
German tuners can have all the skill in the world but if they don't have Scott Slauson then they cannot get the best out of the ECU imho which is why i choose his system.

Even Scotts software uploads quicker than the factory can do it, he sure does know about Porsche ECU's.

I know nothing about Surry RR . mine was done at Thorney Motor Sport.

As for Charlie @ surry RR I don't think he has tested the yellow car in its current form so I have just been told.


There are many Quotes about Scott here are some good ones.

"Softronic’s owner and tuner Scott Slauson is considered to be the leading authority in Porsche tuning by many. With over 30 years in fuel injection experience, Softronic is the lead company in Porsche race car data checking. Softronic sets the ground for which there is no comparison in automotive technologies"


"Softronic has been doing Porsche Performance for 20+ years. As the former PCA technical advisor and now working with Porsche Motorsports and even well known race teams for data checking and tuning, Scott Slauson brings a convenient, well thought out, and proven form of ECU Tuning to Porsche"

"Softronics was created and is run by Scott Slauson. You may recognize his name from the Porsche Club of America and/or the Panorama magazine. Scott has been on the PCA technical committee since about 2001, specializing and sharing his expertise on the 986, 987 and Carrera GT platforms. Scott has been turning wrenches on Porsches for a long time and is recognized as one of the worlds most qualified experts on Porsche DME software."

I think people are happy with Scotts work :-)

Edited by mrdemon on Sunday 3rd May 15:58
That just sounds like marketing flannel? It isn't even about getting more from the 'ECU', it's about what the engine can produce as all these guys are doing is poking some values into lookup tables. There are various ways of doing that, some more or less detectable by Porsche, but ultimately thats irrelevant to the performance of the car. I do think the Germans are pretty lame for always having to pull the ROM from the ECU to tune though! Even those AP-Race people in the youtube vid were doing that, and manthey/cargraphic are the same as they exchange the ECUs...

Are you by any chance getting a discount for being the first UK guy to try and pimp softronic over here? wink

TB993tt

2,033 posts

242 months

Sunday 3rd May 2009
quotequote all
ZeroH said:
Toby this is exactly what I'm going to do once my car returns from Fearnsport at end of mth. Will do before and after runs, thru the gears and in-gear. Have racechrono software and GPS receiver with this increment set - if you have any idea what the 100-200km/h on a stock 996tt x50 is I'd appreciate it (from magazine tests I believe its a fraction over 9secs but not sure the official time)!!
This is where things start to get a little muddy..... For a 345PS N/A Cayman the 100-200kph would be a reasonable increment to show how much hp the car has since it takes a fair time,, time enough for things to get reasonably hot.
For turbo Porsches it is a bit different. A few years ago when we started doing the 60-130mph measurement it weeded out the first lot of whizz bang badly tuned (mostly American) heat soak specials but as the 60-130 took off they got smarter and the tuning got better so that now with a 996tt if you really want to measure your power you need to go a little faster to find the "limits" of the tuning....all a bit moot if all you want to do is go quickly up to ~130mph (which is obviously more than enough for driving in the UK) but we have seen many 600+ 996tt/GT2/997tts over the years which really show their mettle at vmax when called upon for some serious loading - datalogging at Bruntingthorpe, 1.6miles will show which hp is real and which is not (subject to aerodynamics and wind wink )

TB993tt

2,033 posts

242 months

Sunday 3rd May 2009
quotequote all
The post a couple down on this page is of the Alzen 996tt, it was this engine which Bosch MS worked with RS Tuning, they really pushed the boundaries - would it not follow that with the "inside" knowhow and tools to build that sort of engine, tweaking the most out of a Cayman lump maybe just about doable ?

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

EDIT
I had forgotten but RS actually built a fair old monster race Cayman engine for Alzen - Now see how your comments re Scott whateverhisnameis being THE guru look


Edited by TB993tt on Sunday 3rd May 19:29

ZeroH

2,906 posts

190 months

Sunday 3rd May 2009
quotequote all
TB993tt said:
ZeroH said:
Toby this is exactly what I'm going to do once my car returns from Fearnsport at end of mth. Will do before and after runs, thru the gears and in-gear. Have racechrono software and GPS receiver with this increment set - if you have any idea what the 100-200km/h on a stock 996tt x50 is I'd appreciate it (from magazine tests I believe its a fraction over 9secs but not sure the official time)!!
This is where things start to get a little muddy..... For a 345PS N/A Cayman the 100-200kph would be a reasonable increment to show how much hp the car has since it takes a fair time,, time enough for things to get reasonably hot.
For turbo Porsches it is a bit different. A few years ago when we started doing the 60-130mph measurement it weeded out the first lot of whizz bang badly tuned (mostly American) heat soak specials but as the 60-130 took off they got smarter and the tuning got better so that now with a 996tt if you really want to measure your power you need to go a little faster to find the "limits" of the tuning....all a bit moot if all you want to do is go quickly up to ~130mph (which is obviously more than enough for driving in the UK) but we have seen many 600+ 996tt/GT2/997tts over the years which really show their mettle at vmax when called upon for some serious loading - datalogging at Bruntingthorpe, 1.6miles will show which hp is real and which is not (subject to aerodynamics and wind wink )
So basically i need to find somewhere to run a 100-300km/h time !!! bandit Vmax would indeed have been perfect.. next year !! Interesting to see that most of the top times there, year in year out are run by porsche turbos tho !!

mrdemon

Original Poster:

21,146 posts

266 months

Sunday 3rd May 2009
quotequote all
I do have some faster times I will dig them out.

thing is above 100Mph you start to need big Hp to over come drag.
I have been next to a 997 GT3 but after 125Mph it just flew by, but then it does have 415Bhp.

I am getting NO discount or any finders fee, btw
I did this as I was gob smaked at the claims and did this to prove them wrong, but I found out that they are right and the car is amazing.

here is the lastest quote from the last one which was tuned posted today on the Cayman Forum

"Well, what does it feel like? Fantastic, fabulous, punchy, more grunt and yet still smooth, rich and full powerband with more everywhere throughout - not just at the top-end. Exactly what I was hoping for having driven Karel's Yellow Peril a few weeks ago.

I hadn't noticed how much the dip around 3500rpm that my car had previously was affecting my driving experience. Now there is power and torque available on tap and overall it feels like a very well sorted engine map - spot on.
"

some people do not care about figures, they drive a tuned car and just want the same.



Edited by mrdemon on Sunday 3rd May 20:53

N24

1,113 posts

240 months

Sunday 3rd May 2009
quotequote all
TB993tt said:
The post a couple down on this page is of the Alzen 996tt, it was this engine which Bosch MS worked with RS Tuning, they really pushed the boundaries - would it not follow that with the "inside" knowhow and tools to build that sort of engine, tweaking the most out of a Cayman lump maybe just about doable ?

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

EDIT
I had forgotten but RS actually built a fair old monster race Cayman engine for Alzen - Now see how your comments re Scott whateverhisnameis being THE guru look


Edited by TB993tt on Sunday 3rd May 19:29
If that's the Alzen 24hr racer then it was a Cayman running a GT3 engine - as several folks have fairly correctly stated upping power isn't as simple as some would have you think.

A couple of things that always concern me about 'chip' type upgrades are that OEM ECU's have had a LOT of testing done, I cannot believe the same for after market chips. Secondly an increase in power at the top end of the rev range is great in a race car - but how often would you use full throttle on the road?

mrdemon

Original Poster:

21,146 posts

266 months

Monday 4th May 2009
quotequote all
quote "stock 100-200kph is about 14s, if yours has 340 real hp it should come in under 11s "


Well it's not going to do under 11 seconds is it when 385Bhp cars are only just in 11's and GT3 are 11.3 !!!
Must be the extra drag on the Boxster slowing it down above 100Mph

these are some figurers I have spent time collecting 4 for each car than average them out 100kph to 200kph.

14.7 Boxster 3.4 RS60 with 305 Bhp
14.1 Cayman S 295 gen 1
13.5 Cayman S techart 310Bhp
13.5 Cayman S PDK 320Bhp
13.2 Cayman S Weland 320Bhp
11.9 Cayman S Techart 385 Bhp
11.1 Cayman S Weland 385Bhp

other faster Porsche
12.8 997 C2 325Bhp
12.3 997 C2 345Bhp PDK
11.5 997 C2s 355Bhp
11.5 997 C2s 385Bhp PDK ( ok which is right cannot be the same time as the old 355BHp car)
11.4 997 C2s 385BHp power pack car
11.3 GT3 Mk1 360Bhp

So some interesting times there.




Edited by mrdemon on Monday 4th May 09:32

dom9

8,095 posts

210 months

Tuesday 5th May 2009
quotequote all
Have been away and entertaining the outlaws over the weekend...

Interesting conversations going on now, i was hoping Toby might chime in here as he must be one of the more knowledgable when it comes to RR's etc.

It is not about trying to put down the work down here or 'be a doubter' it is about trying to understand what works and why it works, so that we can replicate or improve the mods on our own cars. i have looked at Softronics before and may well use them, but I would like to know more about the Cup car parts first... Mr Demon, where did you get them?