I've wrote this thread to help/give my thoughts and experience to others when modifying their S with N/A bolt on mods, also MB asked me to post my findings as i have finished with my car now (possibly a TB but thats it).

During my entire ownership of the S i have been tinkering with it, I've been fortunate to try different ECU's, exhausts, intakes, manifolds etc and participate in help map an ECU for a westfield kitcar with an F20C engine in with a different exhaust, plus put my car through many dyno runs in different conditions.

Okay I hear regularly on this side of the forum, 'The S is so well tuned out of the box you are wasting you money on n/a tuning as the gains are minimal' - well usually along these lines, but i don't 100% agree with this statement but i can see where people are coming from and there is an element of truth in this statement.

Most folk will do the above bolt ons, others will supercharge, obviously supercharging will yield great performance gains I have witnessed/drove, seen and experienced RISLAR's SC S on here, but this setup ranges from new basic aftercooled about

 

What were the WHP figures?

 

It was 206 max.

 

That is on the high side

AJ my car was very well tuned before I parted out and my WHP figure was 196.8WHP. I would suggest you invest in a better intake as your next mod, that contraption looks a bit cut and shut

So far I have convinced three K&N heat soaking owners to switch to Mugen CAI's and all have reported gains (Ninebolts, sneakfish, redun).

 

The tests aren't exactly scientific.

I would have expected less than a 10bhp increase with the mods you have.

 

Not really mate, mase mapped Dave.B's car which had a better intake, good dual exhaust, AEM ECU, tracysports ts-02 manifold and it made 212WHP.

I agree a little with on the intake side (but i havent experienced heatsoak really), and yes also agree with my work but as i said it isnt finished.

Your mugen tuned car was maybe better midrange, but comparing dyno's is a bit pointless really due to the dyno it self, extraction, fan, type of day it was etc etc.

There are others on here with Toda bits etc that have seen highier figures than me, MB, neilcliocup guy.

 

I can see where you are coming from but the fact of the matter is i have used the same dyno before and after which is key (stock and modded), okay the conditions have varied a bit.

I also have some of the best bolts on you can get for the S, but thats debatable.

Now if i was in the US they would be highier

 

That will be the guys who use TDI North.

 

That is the important bit. If the dyno runs were on different days the readings can be wildly different.

Was it the same dyno operator both times? That can also make a difference.

 

Yes with this dyno today being worse conditions ie 22c ambient (i cant remember the humidty, pressure etc but my mate said it was worse when we looked at the data compared to the first stock dyno). But the first dyno 'stock' being 12c ambient and the overall condition's being different and more importantly cooler thus 'better' (for a word ), so you where i am coming from? - margin would 'probably' be more on a consistent day.

The first was overall a better day.

It would be awesome to dyno the car stock on a cold clear winters day, then the same day put all the bolt on bit's on, and do a run then unfortunately i didnt do that.

Same operator, he's a one man band Steve