Remap S2
- Thread starter J4CKO
- Start date
Diver944
Active member
A proper remap on a rolling road performed to your own specific car will normally cost several hundred, but a performance chip with a more general map can get you 95% there for a fraction of the price. The Promax version at £99 is one of the more well respected variants.
Don't expect more than a couple of extra bhp to the maximum power but most people report a much smoother power delivery throughout the lower rev range
Don't expect more than a couple of extra bhp to the maximum power but most people report a much smoother power delivery throughout the lower rev range
Peter Empson
PCGB Member
Power gains are minimal, as you'd probably expect, but they're nicer to drive afterwards, especially on part throttle. I'd be wary of some of the cheaper chips, I'd want to know who did the work and how. Personally I'd go with a known good one (like a Promax) or preferably (but at much greater expense) a proper rolling road remap (but probably only if I had other mods that might move the rest of the spec further away from standard).
Edited to add: Paul beat me to it. These S2 owners are quick!
Edited to add: Paul beat me to it. These S2 owners are quick!
Ok, makes sense, there was one on Ebay, I emailed the seller and he did seem knowledgeable, was also interested if it gets rid of that little shudder I sometimes get shifting down into 2nd on a closed throttle, Accel racing or something, suspect all the maps are just copies of each others as it doenst take a genius to copy and Eprom and god knows where the intellectual property sits, the BSR map for my Saab was £600 !
Oh, and do they need Super Plus unleaded instead of normal, the previous owner said he always ran mine on Super but I have put it on a diet of Morissons finest unleaded and it hasn't made any difference.
Oh, and do they need Super Plus unleaded instead of normal, the previous owner said he always ran mine on Super but I have put it on a diet of Morissons finest unleaded and it hasn't made any difference.
Diver944
Active member
Yes one of the ways that they can gain a bit of extra power is to alter the timing to make better use of the higher octane fuel, so using Super is a must or you are not getting any gain.
A shudder on downshifting is more indicative of some slop in the drive train, maybe the rubber centre of your clutch is starting to break up (very, very common). I don't believe a remap or chip is ever going to cure the problem you seem to be having
A shudder on downshifting is more indicative of some slop in the drive train, maybe the rubber centre of your clutch is starting to break up (very, very common). I don't believe a remap or chip is ever going to cure the problem you seem to be having
Peter Empson
PCGB Member
There seem to be plenty of different maps out there, so it could be a lottery, but you're absolutely right, anyone can rip a chip if they wanted to and pass it off as their own, it costs almost nothing to do (if you don't have a conscience).
I would want to choose a chip intended to run on super, it makes sense to me as there are obviously gains to be had with higher octane fuel, after all car makers dial in a fair amount of safety margin as standard. I would also want to know who and how the chip was developed, a known chip might be twice the price, but knowing you have something properly developed (and safe) is surely worth the extra?
I would want to choose a chip intended to run on super, it makes sense to me as there are obviously gains to be had with higher octane fuel, after all car makers dial in a fair amount of safety margin as standard. I would also want to know who and how the chip was developed, a known chip might be twice the price, but knowing you have something properly developed (and safe) is surely worth the extra?
The clutch is fairly recent so dont think its that and its not all the time, have read about the 944 shudder, it isn't very pronounced and isnt bothering me.
I will look at the Promax chip, seeing as its a recognised one, guess with cars this old all the R and D was done years ago so there is no saying who did what and when and who deserves any royalties.
With regards to the fuel, the car will still run ok I guess if you put Unleaded in it, its not going to start pinking and running like crap is it ? not sure if they have knock sensors or anything like that ? would you just lose the benefit rather than ending up with a car thats not running right.
Anyone actually had it done ?
I will look at the Promax chip, seeing as its a recognised one, guess with cars this old all the R and D was done years ago so there is no saying who did what and when and who deserves any royalties.
With regards to the fuel, the car will still run ok I guess if you put Unleaded in it, its not going to start pinking and running like crap is it ? not sure if they have knock sensors or anything like that ? would you just lose the benefit rather than ending up with a car thats not running right.
Anyone actually had it done ?
Peter Empson
PCGB Member
Speedy Paul did it again! [
]
About the judder, one area that the standard cars are quite bad is when you come off the throttle, there's very little fuelling and can result in kangarooing in traffic when you really want to seamlessly change speed. I suspect it helps mpg figures, but in the real world I always found it better after this was engineered out, presumably becuase you can keep a more consistent speed. I'm not sure it's quite what you're experiencing, but might be a possibility. I'm not sure if Promax still do a money back guarantee if you're not satisfied, but if they do it could be a good experiment.
]About the judder, one area that the standard cars are quite bad is when you come off the throttle, there's very little fuelling and can result in kangarooing in traffic when you really want to seamlessly change speed. I suspect it helps mpg figures, but in the real world I always found it better after this was engineered out, presumably becuase you can keep a more consistent speed. I'm not sure it's quite what you're experiencing, but might be a possibility. I'm not sure if Promax still do a money back guarantee if you're not satisfied, but if they do it could be a good experiment.
Diver944
Active member
I used to organise a 944 Rolling Road day every year and if you look at the results for normally aspirated owners then cross reference the registration number with the spreadsheet below you will find a lot of them already have chips of some sort - Promax, AMD, BBS, Blitz etc
http://www.cannell.co.uk/944%20UK%20League.htm
I've never bothered modifying my S2 but it's having its yearly service next week so I might just get the Promax chips at the same time. I'll report back.
Oli did a really good writeup concerning chips in his S2 a few years ago, worth a read:
http://www.porscheclubgbforum.com/tm.asp?m=541717&mpage=1&key=chips򄐕
The search function is your friend.
http://www.porscheclubgbforum.com/tm.asp?m=541717&mpage=1&key=Promax%2Cchipò„•
I almost always use the higher-octane motion lotion in my S2 (with the Promax chip), but have never had a problem with using more pedestrian stuff when necessary. (I maintain that the higher-octane stuff is a good economy; yes, it costs more per litre, but you get better MPG out of it, and the ensuing cost/mile is about 10% lower - but that's a separate discussion!)
Oli.
ETA: Blast! Smiffy got there first again! You're really quick off the block on this thread Paul - bravo! [&:]
ETA (again): Paul, the Promax chips are well worth having. I'm sure Andrew will fit them for you as part of the service (it's a fiddly job - a good one to let someone else do) and will be happy to give you a full refund if you don't like them.
http://www.porscheclubgbforum.com/tm.asp?m=541717&mpage=1&key=Promax%2Cchipò„•
I almost always use the higher-octane motion lotion in my S2 (with the Promax chip), but have never had a problem with using more pedestrian stuff when necessary. (I maintain that the higher-octane stuff is a good economy; yes, it costs more per litre, but you get better MPG out of it, and the ensuing cost/mile is about 10% lower - but that's a separate discussion!)
Oli.
ETA: Blast! Smiffy got there first again! You're really quick off the block on this thread Paul - bravo! [&:]
ETA (again): Paul, the Promax chips are well worth having. I'm sure Andrew will fit them for you as part of the service (it's a fiddly job - a good one to let someone else do) and will be happy to give you a full refund if you don't like them.
Peter Empson
PCGB Member
It's nothing a mallet and a hacksaw can't sort out, or have I been doing it wrong [
]
TTM
Well-known member
Clutch judder, especially when gearing down from 3rd to 2nd, is an issue caused by inappropriate springs in the clutch disc.
This was identified by a German contact of mine who has been working on this issue directly with engineers from Sachs.
They did supply him with a prototype clutch disc that seems to have cured the issue completely, but I'm yet to hear of a date for it to enter full production - I doubt there are tens of thousands of 944 NA owners that replace their clutch every year...
This was identified by a German contact of mine who has been working on this issue directly with engineers from Sachs.
They did supply him with a prototype clutch disc that seems to have cured the issue completely, but I'm yet to hear of a date for it to enter full production - I doubt there are tens of thousands of 944 NA owners that replace their clutch every year...
Wow, loads of info, the clutch thing isnt really an issue, it doesnt do it all the time and it isnt bad, it is just occasional and minor, can live with it along with all the other little compromises that come with a 21 year old car. The clutch in it was done in 2008 and the car has done 20k since then, there isnt any judder at any other time.
The remap does sound compelling, cheers for all the info, I did several searches, mainly via Google but didnt turn much up.
Think I will get the numbers off the ecu this weekend and get one ordered.
The remap does sound compelling, cheers for all the info, I did several searches, mainly via Google but didnt turn much up.
Think I will get the numbers off the ecu this weekend and get one ordered.
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