A Wolf in Sheep's clothing?

[Mr GTD]

Loved the read MS1COYS, sounds truly epic fella, but any chance you cud sort your photobucket images out as the ones on your first page ain't working....I WONNA SEE THIS BEAST!!!!

Sorted one, with my own diy version of blotting out the number plate lol....

It seems a lot of my photos have been deleted from my missus' computer  I'm loathed to go and take photos of her, when its sh!tty weather and she's all mucky. I'll do my absolute best to get some more decent photos up asap.

Also I've managed to get my car on a rolling road in Plymouth today, so I'll take some photos of her when she's being abused (god that sounds awful) and obviously I'll post the dyno print outs.

That's all folks 

Cheers fella for sorting something, now I can say that your car truly sounds as a good as it looks....impressive stuff pal, look forward to more updates!!

[MS1COYS]

Loved the read MS1COYS, sounds truly epic fella, but any chance you cud sort your photobucket images out as the ones on your first page ain't working....I WONNA SEE THIS BEAST!!!!

Sorted one, with my own diy version of blotting out the number plate lol....

It seems a lot of my photos have been deleted from my missus' computer  I'm loathed to go and take photos of her, when its sh!tty weather and she's all mucky. I'll do my absolute best to get some more decent photos up asap.


Also I've managed to get my car on a rolling road in Plymouth today, so I'll take some photos of her when she's being abused (god that sounds awful) and obviously I'll post the dyno print outs.

That's all folks 

Cheers fella for sorting something, now I can say that your car truly sounds as a good as it looks....impressive stuff pal, look forward to more updates!!

Thanks dude. I'll do some more timed runs when I've had the new remap and we'll see if we can knock anything off...

[Hurdy]

Yeah that's obviously the best option. Would there be sufficient space in the engine bay of the mk5 to fit an additional tank?

It is tight under the bonnet. The Golf GTI's I've seen with WMI have the bottle on the sidewall of the boot. Makes sense really as the Water Methanol mix stays cool, rather than warming up in the engine bay.

[MS1COYS]

So....what a nightmare few weeks it's been for me. Haven't had a moment to myself and consequently had to postpone having my car custom remapped.

I have however found another Evo chips dealer closer to me in Devon and he has a fantastic reputation for fine tuning and he's also a thoroughly decent chap. 

I did head over to his HQ this morning for the custom map, but alas the technician we required to tweak the boost levels, had called in sick. So I had to settle for a simple power run and a re-schedule of the main event 
The plus side of this, was that I was now able to have a power run done, with my original remap in place and all mods included! Whereas beforehand I had opted for a power run based just on my mods, (as previously mentioned in this thread) to see any gains made, regardless of tweaked boost levels.

Here are the results....





I was pleased to see that my original estimates of the BHP and torque, were near enough spot on. (269.2 bhp / 260.9 lbft)

Boost levels were a little tame. Spiking at 17.6psi. Holding at 15.2psi to 4,000rpm, dropping to 12.5psi from 4,000rpm to 7,000rpm. I've been told that I could safely spike at 20-21psi. Holding at 18-20psi right through the rev range. Bhp gains will be realised and I can't wait to see the results. I'm told we can tweak the remap as many times as we like in order to achieve a smooth linear delivery and to realise close to the 300bhp mark. Realistically I think the maximum this car can handle, whilst still remaining very drivable, is around 300-310 bhp and 280-290 lbft. I'll be ecstatic if we can achieve those figures and I look forward to posting more information as soon as I can.

Would be great to hear some opinions/facts on boost levels that people are running on KO3 turbos and also results from tweaking the actuator/waste gate on the turbo, to help maintain boost levels.

Thanks for reading my drivel!

[AlanD]

Nice top end power, only thing I would say is that it isnt the smoothest of power curves Ive seen.

[MS1COYS]

Nice top end power, only thing I would say is that it isnt the smoothest of power curves Ive seen.

Hopefully that'll be remedied slightly on Thursday. Have you got a curve for yours or other mk5 Gti's?

[AlanD]

This is my latest one:

[MS1COYS]

I know what you're saying about the appearance of your curve seeming much smoother. But surely it is purely down to where the plots are situated on the graph and what parameters for bhp and lbft you have along the 'x' and 'y' axis.

For example both our graphs are done on the very similar sized piece of paper (A4?), my 'y' axis range from 40-275 bhp/lbft and your 'y' axis range from 0-205 bhp/lbft. Yet our rev ranges on the 'x' axis are almost identical. It stands to reason that if one plot is showing more power, than another plot on the same sized graph, then that graph will appear steeper.

Also my rev range climbs in 500rpm increments, whereas yours is in 1000rpm increments, so my graph will appear more 'broken up/pixelated'. Presumably your graph is in 1000rpm increments, to better show the losses in transmission on the under-graph.

On another tangent altogether it seems that both our losses are very similar, 45-50 bhp dependant on temperature I should imagine.

It would be great to have a collection of other various mk5 dyno graphs in this thread, purely for comparative and analytical purposes.

Thanks for the post dude. 

[MS1COYS]

Well we're getting there with the fine tune..... but we're not there yet!

(287.9bhp and 261.9lbft)

An 18bhp increase on the original map, but no real mid range or peak torque gains. We did however manage to stretch the torque out at the further end of the rev range. The original remap peaked at 261.4lbft @ 3,919rpm. The new remap peaks at 261.9lbft @ 4,106rpm.
 
However between 4,750rpm and 6,500rpm on the original remap, the torque dropped from 252.7lbft to 225.2lbft respectively. With the new remap the torque at 4,750rpm is 255.7lbft and at 6,500rpm, 244.9lbft. That's an increase of 19.7lbft at the top end of the rev range, which I'm very happy with. The extra punch from 4,750rpm upwards is really noticeable and makes a considerable improvement to the top end power of what is already a rather explosive tune in the higher end rev range.

The problem I still have is that my car simply won't hold any more than about 15.2psi boost, from 4,500rpm upward. The technician has ordered a N75 valve to see if that solves the problem. If not then apparently slightly tweaking the actuator may enable the turbo to maintain boost a bit further up the rev range.

Hopefully it does, because I had my heart set on smashing the 300bhp mark!

The graph below is the second best run we had, however it was run number 5 and thus suffering slightly from heat soak. I didn't get a print out of run number 6, which ended up being the best run we had, despite heat soak. I'm confident that next time on the dyno, if the car's only just warmed up, it could produce a figure of 300bhp+ even with declining boost. This gives me great confidence that if we can maintain boost, then maybe there's an extra 10-20bhp to be had from the tune.

I've been told that I'm dreaming, to think we can achieve torque figures in excess of 300lbft  Apparently the car will just be too hard to handle for a front wheel drive motor and it'll will consequently place to much stress on the clutch and gearbox. The best we can achieve, I've been told, is better top end and that has already been realised, so I guess we're stuck at 260lbft!







My revised final figures, that I would be happy with are anywhere between 300 and 320bhp and 260lbft.

[thai-wronghorse]

Lovely subtle styling and great to see someone so dedicated to getting it to perform its best.