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Clued up on the CR and CS exhaust bore differences - no worries there.  I would never exchange, anyway, as that removes the possibility of reverting back without substantial ££.

 

I will probably get some stainless, long runner manifolds made up by the local (they are very, very good) and try those out.  Take a few months to soot up and I've still got the ability to revert should it not be to my liking.

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  • 2 weeks later...

Visiting the local on Friday for discussions around the exhaust manifold and the Softronic map is en route.  Things are moving! 

Edited by Aaron
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Let us know how you get on mate. 

If it is good, then maybe we can replicate it for others ?

Kai 

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I've taken the car to my usual exhaust specialist but they were reluctant to make a custom manifold as they didn't think they could achieve the bends required.

 

So I went to the guy that trained these guys (he's further away so not my regular) and we have a date: 4 weeks and a 3 day build time.

 

Softronic map will be here today - Scott is going to preempt the exhaust mods so I won't need to have a new map done once the exhaust is changed.

 

For anyone reading: it's cheaper to buy direct from Softronic rather than Design 911.  The cable is only valued at $50 so the amount of VAT is tiny.  Shipping is $30 and takes about 4 working days.  Scott has been great with his support, response times and my questions.  He won my business with his support abilities.

 

Updates to follow.

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Cable arrived, ROM dumped and sent to Softronic.  Scott is aware of my requirements.  Update to follow once I've flashed the file!

 

As a side note: I haven't got a CEL but do have a code for the missing solenoid since I installed the IPD plenum.  I'll be refitting this when I next crack open the engine bay as it doesn't appear to impact performance or fuel consumption. 

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Tubular, long runners with 2" primaries.  Charlie has done a 3-2-1 design on a few Carreras previously.  We haven't ground out the finer details yet but I'll be looking to finalise them with him closer to the date.  The exhaust is at least a month away.

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Still waiting for Softronic's map.  They had public holidays Monday and Tuesday but hoping to have it today in preparation for the weekend.

 

Also going to pull the engine cover off on Sunday and reconnect the solenoid I removed.

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Update: Scott came through and I had the map tonight.  Taken the car for a spin and the difference isn't massively apparent but the engine tone is much more prominent and the flat spot between 3-4k is completely gone.

 

Just need to wheel her on the dyno with the old and new maps to see the difference.  The car is pretty bloody quick now versus when I started so not sure whether to go through with the exhaust or not... time shall be the judge.

 

Also, I received no import invoice for the shipment from Softronic so I saved about £100 buying direct.

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Now that I've had a few days driving: an update is due.  The more I drive the car, the less difference I notice from the map.  Besides the removal of the 3-4k hesitation, there is little else I can comment on.  Red line is the same place, power drops off just before red line, bottom end torque feels the same...

 

My next test is a friend of mine to passenger, that is familiar with the feel of the car and to hear his thoughts (he has no idea it's been mapped).

 

The final plan prior to the dyno is to revert to the stock map sometime next week and try this in reverse.  I suspect the differences should be much more apparent that way (if there are any).

 

I'm delaying the dyno as I can do that at any time to see the power gains.  But the dyno won't measure throttle response changes or drivability improvements which attracts people more than the 10 HP increases.

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The dyno should show that, when I had my T5 reflashed power went from 135 to 185 and you can see the way it picks up in the midrange over the std set up.

What sort of money are you paying for ecu flashes? The T5 cost £300 with before and after dyno runs , Jasmine Porsche at Nelson said the place use is about £350 and get about 30 bhp more and loads more mid range.

 

Dean

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For what it is worth I have no direct experience on engine mods of these but im not sure you will feel much difference until you lose the cats, it's fine to have all the intake bits upgraded and a map but unless the car can expell exhaust gases more efficiently it's mostly wasted. NA cars always cost a lot for modest gain, manifolds will see your biggest change im sure, better drivability and ironing out flat spots sounds like a result though.

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Yes, of course the dyno will show the HP and torque figures but a remap isn't just about peak numbers at maximum load for me.

 

Remapping an N/A engine versus a turbocharged petrol or diesel is rather different.  With a turbocharged engine, you simply increase the target intake charge pressure and the power goes up in correlation to its efficiency (compressor/turbine sizes, versus heat output and possible revolutions).  There's also target AFR and camshaft/ignition timing adjustments in there too, but the majority of the gains comes from the turbocharger outputting more boost, and less so from the rest of the tune.

 

The map came in around £830 which is pretty average compared to the other options around.  Having the option to revert to stock any time I should desire is also a plus. 

 

Crafty1, I'm with you on this one.  I'm beginning to think that freeing the exhaust manifold up may be the only way for the butt dyno to tell the difference.  As I said earlier in the thread: my tuning history is pretty hefty, especially with N/A setups.  It's much less knowing what to do and rather me not wanting to do it.  I had a loud exhaust on my NC2 MX-5 (which was 205 HP) but I couldn't take it after a few months; it's too brutal on my ears.

Edited by Aaron
Typo
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The T5 was remapped with nothing done to the turbo pressure all left std, as I am new to the fast car world  I am not to sure how easy the ecu is to reflash but in my spare time I work for bike team and the bike gets reflashed nearly every time it comes in the pit and can put things anywhere in the rev range that the rider wants, but that's all from the latest ecu. 

Is the Cayman a lot harder to reflash then or just not that modern?

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7 hours ago, FLAT STICK said:

The T5 was remapped with nothing done to the turbo pressure all left std, as I am new to the fast car world  I am not to sure how easy the ecu is to reflash but in my spare time I work for bike team and the bike gets reflashed nearly every time it comes in the pit and can put things anywhere in the rev range that the rider wants, but that's all from the latest ecu. 

Is the Cayman a lot harder to reflash then or just not that modern?

Was late when I put that last night, what I ment to put was the turbo was std but  parameters  Controlled by Ecu Will of changed to follow remap.

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5 hours ago, FLAT STICK said:

Was late when I put that last night, what I ment to put was the turbo was std but  parameters  Controlled by Ecu Will of changed to follow remap.

Almost certainly altered the boost, its simple physics/chemistry. The more pressure means more air means more oxygen means you can burn more petrol means a bigger bang means more power. A NA car will always be limited as you will never get above a certain volume of petrol/air mixture even with the lowest possible resistance in the intake and exhaust path. I guess some NA engines tweak the mixture and timing to get better mpg, emissions or smoothness but there's probably not a huge power surplus to unlock or they would simply offer fewer cc and max out the power for the smaller engine. 

 

(Probably teaching you to suck eggs, sorry if so)

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Exhaust is a must if you want to free that beauty up, was really noticeable over the other things when I did all the work on my 987 - miss that car 

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  • 4 weeks later...

Thought I would conclude this off.  I do not have dyno numbers (yet) as I may get an exhaust in the future.  That's still up in the air right now.  I think the car is fine as it is, in all honesty.

 

Anyway, onto the main purpose for this post: I recently drove a friend's 350Z (the 313 HP model) and, whilst it felt more powerful than my car, how fast the speedometer climbed was markedly slower.  I was, previously, rather accustomed to the Japanese 'pull' that you would feel under WOT.  Having now driven the Porsche for 7 months and gone back to a Japanese sports car temporarily, however, it has become apparent that the butt dyno sucks in a Porsche.  The acceleration is deceptive and is hard to just feel.

 

For that reason, I will need a dyno to confirm that the remap has done anything at all.  I will revisit this in a few months, or maybe a few years, or perhaps not at all; it all comes down to the exhaust. 

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