Yeah - have been a bit slack on things hey... just gotten so damn busy this year, and with work stuff O/S things have just been nuts !!!
😊
Anyway, have run 2 hillclimbs this year but been having a few issues the injection.
Main symptom has been that she breaks down and misfires up in the rev range under full load. Hasn't looked fuel related as the AF looks fine right up until the misfires.
With a bit of digging around and a few different people involved it looks to be that the triggering gets erratic at higher RPM, and last event made a few changes on the sensor alignment which moved where in the RPM range the problem started, so looks like on the right track.
With some help from DB have come up with a different setup for the sensing on the end pulley to get it more stable/reliable.
Now that back home hope to get it in and sorted this week.... will post an update and pics when I have.
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Don't think it's the leads Daimo... they're decent quality Bosch ones that I'm running.
If the different triggering setup doesn't solve it tho, leads might be the next suspect...
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Pfft... c'mon Ian.... where's the challenge in that ?!?!
Anyway, have now got my new trigger setup fitted... a 12 tooth Motech wheel, spaced out from the dry sump pulley with a GT101 sensor looking directly down onto it.
The pulley spacer and mounting the trigger wheel up is courtesy of dangerous, and uses a Type 3 pulley bolt and Berg washers, plus 5 M6 HT allen bolts to prevent any movement.
The sensor mount is my own crazy creation... 24mm thick bit of ally I milled down, mounted using the fuel pump bolts. A bit unconventional perhaps, but it's VERY stable and has PERFECT alignment and clearance of the sensor to the teeth.
Haven't driven her yet, but even just revving in the garage there's a noticeable difference...now starts almost instantly, iignition timing looks rock solid, and she sounds VERY angry up in the revs.
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Craig Torrens6 times Australian, 7 times State Hillclimb Class Champion
Pulley is actually 6 inch, but nah - she doesn't see much street driving these days.
Considered talking to Ben, but really the process of working through stuff is all part of the enjoyment for me.
👍
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Craig Torrens6 times Australian, 7 times State Hillclimb Class Champion
I did last year without any probs.... but then being dry sump I have a lot of oil and a decent cooler up front.
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Craig Torrens6 times Australian, 7 times State Hillclimb Class Champion
The DTM is definitely better than the stock shroud, but I didn't have head temp gauges with the stock setup so can't give a definite figure on how much better.
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Sides, had a problem with the Cook open wheeler that had similar characteristics to what you are describing. Turned out to be a faulty crank angle sensor. We run the same sensor for our road speed sensor, so just swapped it over.
Craig, Ben’s car has the latest Platnum computer the same as Sides, Garfield is still running on the 5yr old E8........at this stage can't see any point in updating.
Yeah, I've kinda let this thread lapse a bit hey....
😊
Update from the tail end of last season is that all my problems turned out to be caused by an ECU fault... there was some problem with the signal ground circuit which meant that when the alternator was charging the pulse width of the injectors could go haywire. Unsure if it's something that just happened or if related to the original alternator I had that failed. And of course being related to a spinning alternator higher revs made the problem worse.
Weirdly it didn't show up as signal noise in the triggers or anything like that which made it harder to figure out, but once FINALLY identified the ECU was repaired under warranty, bolted back in the car and all good and back to my normal pace for the last couple of events.
Since then the engine has had an off season check over, and although all looked good just couldn't resist the urge to play... so in went some notched Wiseco's and slightly longer rods... allowing for the cam to be advanced a bit without sacrificing compression or clearance.
Also a bit of outside-the-engine tinkering - adding an idle control circuit, experimenting with closed loop during warm up etc. etc. to try and just to make her a little easier to live with.
Oh plus one of Classic's Sidewinder systems to replace the cruddy old fat boy I had... it's REALLY SHINEY now CT !!!
😂
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Re the diet - well my numbers at Warwick were consistent (ish) but didn't add up, so dangerous convinced me to get Jezzi weighed once and for all.
And wouldn't you know it - she's a bit of a porker !!!
As raced with about 1/4 tank of fuel, no driver and passenger seat removed... 880kg on the dot... so at Warwick with me and the passenger seat in she would've nudged and possibly tipped the 1000kg mark !!!
Since then without putting in speed holes or doing anything dodgy... just removing unecessary things like ash trays, lighter weight year model bits etc... the simple "weigh what comes off, weigh what goes on" with my digital fishing scale says have saved just on 20kg, with about another 6kg more I can still do.
And no - there's no titanium nuts involved - I haven't won Lotto !!!
🥷
End result... first event out she felt A LOT sharper in the handling, times more consistent than ever. Even on a massively hot day, tyres past their prime, all the usual driver excuses etc. I managed to improve my record by 0.25s... so time and effort well spent I think !!!
😀
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Its amazing how the weight can add up with the various additions.......I remember weighing my hillclimb car (832kg) and wondered where all the weight was ! Rollcages, swaybars, braces etc all add weight 🥲
I reckon the ragtop is close to 1000kg's........the rear subwoofer box weighs in at 43kg alone !!!!!
Its amazing how the weight can add up with the various additions.......I remember weighing my hillclimb car (832kg) and wondered where all the weight was ! Rollcages, swaybars, braces etc all add weight 🥲
I reckon the ragtop is close to 1000kg's........the rear subwoofer box weighs in at 43kg alone !!!!!
BiX wrote:Its going to scare me when I find out what the super weighs...... and it hasn't even got a cage yet!
I think i better loose 25kg's will be easier than taking 25kgs of of the car. To much expat living in SE Asia.....
Heh heh, yeah - all my work travel lately hasn't helped in that regard either !!!
😂
My plan is to do both... saving 40kg is better than saving 20kg.
Based on just the length of main members, the cage I've calc'd is around 70-80kg... so no chance of getting anywhere near Heath & Christine's 800kg or Col's 803kg with their alloy cages !!!
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