Tuning, Dynos, Power Figures Moans etc....
It feels great honestly no surging having the boost peak higher up the rev range means the top end power is better. Where as the mtm map has a peak of 1.7bar much lower down the revs and then dropped to 1.5bar.sitas3 wrote:do you not feel any surging with a boost profile/curve like that? is that what you wanted?
Star Performance Misano Red RS4
548bhp 490lbft
548bhp 490lbft
Simon/ all i stumbled on this ... re vagcom and lamda..sitas3 wrote:Barry, can you check these Lambda/fueling readings with Vag-com as well? There are certainly measuring blocks for the lambda sensors.
Don't forget guys, we still have this thread where we are asking for any RS4 owners to do some logging on their cars - tuned or stock...
http://www.rs246.com/index.php?name=PNp ... ic&t=48119
when i get back from Hong Kong next week I'm going to invest some more time in logging mine and a couple of cars that are based near to me.
http://forums.vwvortex.com/zerothread?id=1206641
Posts from Uwe vagcom guru himself..
that's a great find Paul - will attempt to digest all that soon.
Here's another great post on AudiWorld from Ross-Tech about fuel Trim (lean or rich running)
http://forums.audiworld.com/vag/msgs/456.phtml
maybe we can compile a FAQ about this 'Black Art' stuff
Here's another great post on AudiWorld from Ross-Tech about fuel Trim (lean or rich running)
http://forums.audiworld.com/vag/msgs/456.phtml
maybe we can compile a FAQ about this 'Black Art' stuff
M3 CSL - Silver Grey, a few options.
Not barry, nevermindDuncS3 wrote:Barry do you think CATS/exhaust would make a difference (on a S3)?
Dunc
They don't seem to make a huge difference, certainly not the claimed figures.
My car makes maybe 5bhp more with the cats - but you'd find it very difficult to notice on a turbo car.
Running on a standard 1.4-1.5bar remap with custom I/Cs, Cats, Exhaust, Silly power enhancing manifold gasket and OEM filters my car will make 260bhp and 280lbft...
Right,my thoughts on s3's and tuning in general;
As barry states a regular chipped s3 runs 250bhp with many mods etc you could possibly get 270/275(exhaust,de-cat,improved ic) but this is the max the standard turbo will acheive.You WILL acheive more power at 1.2-1.3 bar than silly 1.5 bar that a few companies reccommend.My car(same spec) made 23bhp and 20lb/t more on amd's rollers than owens =fact.I think that 60bhp loss on a haldex equipped car is correct.
Tuning is a specialised field and therefore you should seek specialists,find out where race teams take there business because this is the place you want to go(have you ever seen race cars at the places you go?).A basic chip should will improve performance but you get what you pay for .If you want the best mappers with the best equipment it WILL NOT be cheap.In my opinion (although i don't know rs4's) the best gains from a rs4 irrespective of mods will be a full standalone ems.The only one that will work with DBW is motec but fortunately they are the best.Now this route will be future proof as it can handle bigger injectors/turbos etc ,it can run anti-lag/traction etc.It will cost you approx £3k but i'm sure it will be the best 3k you could possibly spend on modifcations and will bring the absolute best possible performance that can be acheived from your car.
Tuners i recommend,Owens Developments(talk to mark),G-Force,Dastek uk(scotland).
As barry states a regular chipped s3 runs 250bhp with many mods etc you could possibly get 270/275(exhaust,de-cat,improved ic) but this is the max the standard turbo will acheive.You WILL acheive more power at 1.2-1.3 bar than silly 1.5 bar that a few companies reccommend.My car(same spec) made 23bhp and 20lb/t more on amd's rollers than owens =fact.I think that 60bhp loss on a haldex equipped car is correct.
Tuning is a specialised field and therefore you should seek specialists,find out where race teams take there business because this is the place you want to go(have you ever seen race cars at the places you go?).A basic chip should will improve performance but you get what you pay for .If you want the best mappers with the best equipment it WILL NOT be cheap.In my opinion (although i don't know rs4's) the best gains from a rs4 irrespective of mods will be a full standalone ems.The only one that will work with DBW is motec but fortunately they are the best.Now this route will be future proof as it can handle bigger injectors/turbos etc ,it can run anti-lag/traction etc.It will cost you approx £3k but i'm sure it will be the best 3k you could possibly spend on modifcations and will bring the absolute best possible performance that can be acheived from your car.
Tuners i recommend,Owens Developments(talk to mark),G-Force,Dastek uk(scotland).
360bhp 342lb/t
One comment: Do not take dyno graphs as the true power figure. Dynos are meant for comparing between modification before/after -and you can not compare figures in 2 different dynos either. There are too many variables, dyno specific losses (due to rolls) -may be a lot higher than actual drivetrain loss in drive situation, cooling etc.
It is irrelevant what the power figure on dyno is. Say you have 2 tuned cars that do 0-100 mph in 10 seconds vs 13 seconds of the stock. One was tuned in dyno X which showed 460 hp, other in Y with 476 hp. Which is better?
Speed matters, not dyno sheets.
Thanks for a good post, that in my mind verifies what I've known all along, chipping N/A-cars is absolute waste of time -unless there are major mechanical changes.
It is irrelevant what the power figure on dyno is. Say you have 2 tuned cars that do 0-100 mph in 10 seconds vs 13 seconds of the stock. One was tuned in dyno X which showed 460 hp, other in Y with 476 hp. Which is better?
Speed matters, not dyno sheets.
Thanks for a good post, that in my mind verifies what I've known all along, chipping N/A-cars is absolute waste of time -unless there are major mechanical changes.
Ryan can you tell more about your thoughts regarding lower boost = more power - you talking more BHP?Ryan_s3 wrote:You WILL acheive more power at 1.2-1.3 bar than silly 1.5 bar that a few companies reccommend.My car(same spec) made 23bhp and 20lb/t more on amd's rollers than owens =fact.I think that 60bhp loss on a haldex equipped car is correct.
Dunc
When i was talking to mark at owens he informed me that the tt's(225) he had been tuning i the last few years would make more power at 1.2/1.3 bar than 1.5 bar.He told me how one came in from a reputable tuner that was detting it's head off at 1.5 bar he turned down the boost at got more power than when it was at 1.5bar.This is the experience of a tuner and not my own.Mark has his own leon cupra r revo'd but it was not making anywhere near the power figures found at stealth and others i reckon around 255ish.
360bhp 342lb/tYes the Revo Cupras seem to be making big figures that I have never seen a Revo S3 make. I also think lower boost will enable to perhaps run more timing due to less heat etc.
Its a tough one, we always want more power and there are plenty of addons and accessories that will claim to give it but most of it just money for old rope.
Basically remap and then big turbo seem to be the only worthwhile power producing mods.
When will your GT28 conversion be ready?
Dunc
Its a tough one, we always want more power and there are plenty of addons and accessories that will claim to give it but most of it just money for old rope.
Basically remap and then big turbo seem to be the only worthwhile power producing mods.
When will your GT28 conversion be ready?
Dunc
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