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Discussion in '(Archived) Engine Discussion and Tuning' started by EddyH, May 6, 2006.
No ****, Sherlock
Two line review is that it .........is that really meant to keep us going
Ok, I've got a few minutes to spare so here's a bit more:
Gearbox - The longer ratios and extra gear are a big improvement, combined with the extra capacity off boost cruising is very good. I had a Diesel Geek short shift fitted and at the moment I don't like it at all, very notchy and takes ALOT of effort to engage. I'm going to try and adjust it again now it's had chance to bed in but if it doesn't improve it's coming off.
Spec Single Mass Ali flywheel - revs up very quickly but is quite noisy at idle and if revved without load. The noise at idle has been partially overcome by adjusting the idle speed and the noise certainly isn't enough to make me regret fitting it.
Spec Stage 3+ clutch - Nice and light which is good but is a little strange in use and takes a little more control than normal when setting off gently. It seems to have no problem handing the power, however I've yet to try a full on standing start launch.
Noise - The 3" DP and decat have made the car louder and there's definetely more drone on the motorway. I think this small sacrifice is worth the increase in performance though.
How it drives (0.7bar running in map) - Quite rough at low revs but very smooth above 3krpm, nice kick just below 4krpm when the turbo kicks in and keeps pulling to the limiter at around 7.5krpm. Even at this level of boost performance was significantly better than when running the K03s (240bhp/280ftlb). Only on road comparison when running this map was an RS6 which I stuck to but didn't have enough to overtake, the driver wanted a chat afterwards and claimed to be running 580bhp (which I doubt) and commented that he didn't have his NOS switched on and I wouldn't have kept up if he did.
How it drives (1.3bar initial performance map) - Now much smoother at low revs very easy to pootle round town etc.. Turbo now spools a little later at around 4.5krpm but comes in with a much bigger kick and acceleration becomes what I can only describe as brutal, runs out of revs very quickly thus I'm hoping for a raised limiter on the next map. On the road I reeled in a 997 C4S very quickly and another occasion exiting a roundabout onto a dual carraigeway with a Fireblade on my bum I put my boot down and he couldn't get past with him only gaining slightly when I was changing gear (which takes too long with the current diesel geek).
8k limiter Edd.. go for it
That's what I had in mind.
whats the planned level of boost when all run in?
Around 1.6bar but that's subject to change.
Just a note on the diesel geek - I'm happy with mine, it does increase the notchiness a bit, as you'd expect, but it certainly doesn't take ALOT of effort to engage gears. In fact when you're "on it" it seems to slip in quite nicely...
Sometimes when you're not "on it" and don't press the clutch right down it can be a struggle to get it in gear, so maybe it's to do with your clutch set up, but adjusting it is the right thing to try first...
I was lucky enough to get my fat head under the bonnet of this beast last Sunday and i got to admit i was very impressed with how neat and tidy the engine bay looked.
Yes, the notchiness isn't a problem and was expected, I bought the Dieselgeek because I tried one in GaryM's car and liked it, however his was an ultra and I'm not sure just how that differs from the Sigma which I have.
All the gears engage and I haven't missed any changes but they are slow and take condsiderable effort.
Hopefully it's just an adjustment problem.
Just a little update on the side issue of the Diesel Geek; I've had a look at the short shift mechanism and exchanged a few emails with Jim from Diesel Geek (who is very quick to reply). It seems that my problems are almost certainly being caused by manufacturing tolerances, I've been advised on solutions to these issues which I hope to sort tomorrow evening.
Any news/updates on how your getting on.
Still running the 1.2/1.3bar map and generally very happy. However after further adjustments to the Diesel Geek which did improve matters I still can't get on with it so it's coming off.
I was speaking to Mike about your car a few days ago. Hows the lag with the 1.9? What kinda power you reckon once you get the finnal map?
The spec does sound impressive.
Lag isn't really a problem once your used to how to drive the car. Above 3krpm there's plenty of off boost oomph to keep you going until into the 'proper' power band.
Yeah i was thinking a wee bit of lag lower down would help traction but as your 4x4 it not really an issue.
come on eddy you made the big annoucement about your upgrades etc,posted a few comments and it's all gone quiet again! are you bored already we'll have to have a little head to head sometime on the old 1/4 mile mrc tt vs jbs octy-who will win
I'd love to see that one though you being an acomplished 1/4 mile racer and having no fear when it comes to launching a car may just have it edging in your favour.
Eddy should be running more power so it would depend on how he gets it off the line.
What would the weight differences be between the cars?