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

[mcandmar]

I suspected the dyno is a little optimistic so thats probably spot on for a stock motor. My 7A made 174bhp which seemed a little too healthy for an engine thats clocked up over 300k, even with a rebuilt cyl head.

[John Reavey]

Hi Shane,
got 240bhp on Martin's Dyno! He thought a stronger wastegate spring might be giving higher than expected result? MFTS is knackered, I just left #4 terminal unplugged, so no more Autocheck beep on start up! Will get round to replacing it sometime soon. Temp gauge is fine and showing normal temps! Got the dreaded 53 code on the autocheck screen after re-fitting the clocks, but figured it out and sorted, left side knob was pushing against the button for setting max speed warning/autocheck sequence at rear of clocks!
John

[Jonnybravo]

Speak to Paul if he is mapping it, I am sure he can offer you the info you need.

You can spend a fortune on gauges to monitor things but a wideband and maybe a EGT probe gives enough info to keep things safe IMO.

[s2_wot]

The shopping list grows.. at least I know in time to get the bung into the downpipe before the cats.

[Jonnybravo]

If your using a stock ecu I don't think there is a input for it.

Most aftermarket widebands the AEM included come with a gauge so you can simply monitor it from there.

Its definitely something worth having in a turbo car.

[s2_wot]

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

do I need one of those guages in the car or will the ecu interpret the output.

Hi Shane, I used Martin Tracy in Enfield to Dyno the coupe shortly after getting it.
Not that I would know, but he seams to know his stuff. His is based in the Industrial Estate on the Trim Road in Enfield.

Didn't know you dyno'd her, what sort of figures did you get back? How the mfts?

[John Reavey]

Hi Shane, I used Martin Tracy in Enfield to Dyno the coupe shortly after getting it.
Not that I would know, but he seams to know his stuff. His is based in the Industrial Estate on the Trim Road in Enfield.

[Jonnybravo]

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

[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

[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]

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.

[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.

[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.

[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.

[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