2014/05/06 21:29:29
Dudeman
robk
darius
^ not to mention you are a skinny white Takumi guy which helps


Hahaha very true!




 
Yeah, last years Picton go-kart was not fair! I'm close to 100kg, you can have a 50kg weight penalty for the rematch to make things even!!
2014/05/06 23:32:59
Eric
How does this thing go for traction now? time for bigger tyres haha?
2014/05/13 00:54:32
robk
Eric
How does this thing go for traction now? time for bigger tyres haha?

Tonight I went for another drive and continued familiarizing myself with the insane power delivery, on dry roads. On one occasion, instead of gradually applying the throttle, I tried mashing it to the floor in 1st from a slow rolling start just to see what happens in the extreme case. As a result, the tyres were spinning through the entire rev range in 2nd and 3rd gears before I had to back off. Even with a Quaife LSD the car wanted to squirm sideways and fishtail on the straight road. Now I know what not to do hahaha.
2014/05/13 15:19:19
mobi
Wow Rob!!
You have fulfilled the promise of this car. The modification path is quality and it definitely shows in the results.

You definitely need bigger stickier rubber to hook up that much grunt, or maybe you enjoy all the tyre squealing fun that 350+RWKW can provide.

Great work, enjoy the car and be safe, with this much power the MR2 platform can be a handful....
2014/05/13 15:26:16
rikkir
mobi
Wow Rob!!
You have fulfilled the promise of this car. The modification path is quality and it definitely shows in the results.

You definitely need bigger stickier rubber to hook up that much grunt, or maybe you enjoy all the tyre squealing fun that 350+RWKW can provide.

Great work, enjoy the car and be safe, with this much power the MR2 platform can be a handful....

With great power comes great responsibility?
2014/05/13 16:21:33
robk
mobi
Wow Rob!!
You have fulfilled the promise of this car. The modification path is quality and it definitely shows in the results.

You definitely need bigger stickier rubber to hook up that much grunt, or maybe you enjoy all the tyre squealing fun that 350+RWKW can provide.

Great work, enjoy the car and be safe, with this much power the MR2 platform can be a handful....

Hey mobi, it's been a while! I hope you've been enjoying your sdub as much as I've been enjoying mine.

Wider rims and tyres at the back would be nice, but my rims are very rare and I couldn't be too picky about widths (I love the rims so I never want to compromise by changing them...unless I get them rebarrelled some day). Anyway, I do enjoy the tyre squealing, up to the point where it's fun but not excessive. The behaviour that I described when mashing the throttle to the floor and holding it there, is something that I will avoid at all costs in normal circumstances, but I had to try it at least once haha. Normally when I squeeze the throttle on more gradually, there is a much more suitable and fun amount of wheelspin.
 
rikkir
With great power comes great responsibility?

That's for sure. As mobi said, it's a handful!
2014/05/13 16:52:28
WIDEMR
What do you think of the racerx cam sensor on the engine mount? hows it been working, compared to the dizzy side one you had?
 
Also im sure i read you were having issues with the 60-2 wheel, was this the crank? what issues were you having.
2014/05/13 18:53:12
robk
WIDEMR
What do you think of the racerx cam sensor on the engine mount? hows it been working, compared to the dizzy side one you had?

The RacerX cam sensor in the dizzy location was going well at first, but I soon realised that it was poorly designed, with oil leak problems and excessive wear due to the shaft design. When I emailed RacerX about the problem, they agreed that it was a flawed design, which is why they sent me their newer kit (for the engine mount on the other side) free of charge.
The new cam sensor kit on the engine mount is working perfectly now, but I was unlucky and had to overcome initial teething issues with it too. The kit comes with a cam reset disc with one small slot cut out of it, instead of a single tooth, and that disc mounts on the exhaust cam sprocket with a spacer in between. The hall effect cam sensor is aimed at the outer face of the disc, rather than the edge of it. The problem is that a tiny imperfection in the spacer will be amplified at the outer face of the disc, causing the air gap to vary in front of the sensor. In my case, it varied enough to cause problems. I solved the problem by modifying the cam reset disc (with a grinder) to have 1 tooth instead of 1 slot, and I made the tooth bigger to ensure that it would be reliably detected. Then, by having a tooth instead of a slot, I was able to adjust the air gap with the tooth in front of the sensor, and any deviation around the rest of the disc would be ignored by the sensor.
RacerX said that they use a slot instead of a tooth simply because it's easier to manufacture, which is what I expected.
 
*EDIT* Here are photos of the new cam sensor kit, before and after I modified the disc to have 1 big tooth instead of 1 small slot.
Before:

After:

 
 
WIDEMR
Also im sure i read you were having issues with the 60-2 wheel, was this the crank? what issues were you having.

Yes the crank. At about 6500+ RPM, my ECU wasn't getting reliable pulses from the RacerX 60-2 crank hall effect sensor. Basically the teeth on the RacerX 60-2 crank trigger are very small (in degrees), so after the signal was filtered by the ECU some of the teeth/pulses would disappear altogether. This could've been fixed with a firmware update, but instead I chose to design my own 36-1 trigger wheel and had it laser cut locally. I had fun doing that anyway, and I was able to design it with teeth of a suitable width etc, and be totally confident of solving the problem straight away. Also, 36 teeth is plenty, 60 is more than enough.
2014/05/19 19:07:44
robk
I replaced my tattered old gear shift boot with a new OEM one. The TRD shift knob is a recent addition too.

 
It's quite an improvement over the original:

2014/05/27 19:30:15
robk
Today I received the Dandism floor mats that I ordered on eBay last week, and they're in great condition!
Finally I can get rid of my crap aftermarket floor mats, as I should have done long ago.
 

 

 
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