knock, knock who's going to tune my s2 for me?

[s2_wot]

RS2 Turbo, Wagner Black intercooler and cast exhaust manifold, 3" exhaust, RS2 injectors + headgasket.

I've yet to decide on some sort of fancy stronger rods. In general we have rubbish fuel here which is one thing that encourages knock. So I want to tune the car using topaz fuel I can buy locally.

I would like to start talking to a tuner and plan for the costs involved or can I get the best out of the car with s2central working it out based on experience.

@Paul if you read this, would there be any benefit to renting a 4wd rolling road for a few hours somewhere this side of the pond, and with you behind the computer.

[mcandmar]

I'm building a similar spec motor and will be using Pauls chipsets. If money was no object i would book it in with MRC.

[prj]

You seem to have RS2 setup replicated... you can use a generic chipset and it will drive fairly well.

Custom on a dyno is better of course, but it will cost a lot more, for maybe 10% increase in performance.

[s2_wot]

I'm building a similar spec motor and will be using Pauls chipsets. If money was no object i would book it in with MRC.

That might be the safest way to go to get her running alright, will definitely talk to Paul long before I turn the key.

[driftin jo]

If all you can get is rubbish fuel then I would suggest dropping the compression a little bit , that way you can make full power .
Take it to MRC on the fuel you are going to run it on everyday and with the lower compression you will get maximum potential out of the RS2 set up .

[s2_wot]

can I ask the stupid question of whats the best way to go about lowering the compression ratio, double up on the head gasket or modified pistons? I must do a search on here.

[prj]

Don't be overzealous.
Even the RS2 can run on 95 octane without bending rods.
This is because Motronic has per-cylinder knock detection and it will retard timing if needed.
All the generic chips have quite a bit of headroom on 98 octane.
I think you are worrying too much...

A friend of mine made some slight bananas (engine still ran fine with bananas).
This is because he used to run some weird chips and 2-2.2 bar boost, and had really lean AFR.
He had very hard knock, and still it took him ages like that to bend the rods slightly.

That was before we met... after we met I remapped his car and he had no knock, but it was too late by then...

[s2_wot]

Don't be overzealous.
Even the RS2 can run on 95 octane without bending rods.
This is because Motronic has per-cylinder knock detection and it will retard timing if needed.
All the generic chips have quite a bit of headroom on 98 octane.
I think you are worrying too much...

A friend of mine made some slight bananas (engine still ran fine with bananas).
This is because he used to run some weird chips and 2-2.2 bar boost, and had really lean AFR.
He had very hard knock, and still it took him ages like that to bend the rods slightly.

That was before we met... after we met I remapped his car and he had no knock, but it was too late by then...

Dmitri, I'm allergic to bananas, and so is my wallet

[driftin jo]

you can get 390 HP from a properly tuned RS2 set up at MRC without any knock or danger of bent rods if it is tuned on good fuel .
If you turn up with 95 Ron they can make a good safe tune also but it is not going to be 390 HP.
If you lower the compression just a little bit they can make a tune for 95 Ron with 390 HP .
I suppose it all depends if you are going generic chips or proper tune for more power that the RS2 turbo is capable of.

[Jonnybravo]

Personally I'd leave the c/r alone, I wouldn't sacrifice off boost driveability.

If its getting a custom map you can get round it anyway.

[S2central.net]

Certainly got a couple of safe options in rs2 trim. Guessing you will the highest boosting version which gives circa 550N and 380bhp on 98 fuel. Reckon 5-10% less on 95 maybe. There is a 4 wheel roller in Westmeath but the open road is better for mapping but care is required obviously. You need a wideband O2 install to get any decent afr readings. I advise NOT to mess with compression ratio - just no need for that spec. Will catch up with privately regards options and timing.

[s2_wot]

Certainly got a couple of safe options in rs2 trim. Guessing you will the highest boosting version which gives circa 550N and 380bhp on 98 fuel. Reckon 5-10% less on 95 maybe. There is a 4 wheel roller in Westmeath but the open road is better for mapping but care is required obviously. You need a wideband O2 install to get any decent afr readings. I advise NOT to mess with compression ratio - just no need for that spec. Will catch up with privately regards options and timing.

I hadn't factored for the WB 02 sensor but forund an interesting thread about the location. Is that wired back to the ecu or otherwise?
The thing with the fuel here is the Topaz and Maxol stuff are meant to be 98-98 RON but that's not official 'cos they're selling it at the same price as normal. All things being equal you get what you pay for so who's fooling who?
550N and 380bhp or thereabouts will do me nicely, I'm happy to tune for reliability anyway.

Paul I would appreciate your input. The nuts & bolts stuff will be right, but the flashing lights etc will have to be done by someone else.

OT but who is this guy in Westmeath, I've heard of him from a couple of sources at this stage?

Whenever you get a chance maybe you could drop me your thoughts on timing etc.

[mcandmar]

http://www.westwardeng.com/ think his name is Martin Tracey. I've been there a few times, hes the guy who did the machine work on my block. Also had the 7A on his dyno many years go.

[s2_wot]

http://www.westwardeng.com/ think his name is Martin Tracey. I've been there a few times, hes the guy who did the machine work on my block. Also had the 7A on his dyno many years go.

Aha, westward in co. meath, thats a horse of a different colour altogether

[Jonnybravo]

I use a AEM wideband, their not massively expensive but are known to be very good.