Open Source Rb Trigger Kit

[SimonR32]

Everyone loves a picture.

Timing logs off my own car.

Without a crank trigger.

With crank trigger.

Probably worth mentioning that it's not essential on all RBs. For instance mine with the stock CAS is about as accurate as your trigger set up

[XKLABA]

Just curious what machining those slots into the balancer does for the balance of it, will it need to be rebalanced, especially for someone that plans on running it past 8k

[murrayis]

I plan on testing the balance of the balancer however with the same amount of material being removed on all sides it should not too be much out of the original balance.

[BlackBox]

Probably worth mentioning that it's not essential on all RBs. For instance mine with the stock CAS is about as accurate as your trigger set up

I don't understand how some can have issues while others won't, even with the same setups, .. I want to upgrade ECU but am fearful of timing issues, so don't know if I should go for a trigger kit from the get go even though as you say it's not essential in all cases

[murrayis]

Little more clearance and we'll be good to go!

[BlackBox]

I hope something like that with all the mass at one side would not cause issues at high rpm? The design is a little different than the others I have seen. Would it still work with vct?

Edited December 31, 2014 by BlackBox

[murrayis]

Hi,

I thought the same but then I looked at some other kits that just use a longer bolt in the position of the adjustment bolts on the cam gear which weighs about the same as this 1.6mm rolled steel.

I welcome professional feedback

Cheers

[XKLABA]

Little more clearance and we'll be good to go!

20141231_121451.jpg

Will that fit under the cam gear cover, also the GT-101 sensor needs a 2mm air gap, I found this out the hard way

[GTSBoy]

If it were me, I would make it a disc (instead of that small square in the centre) out to the full diameter with the tab sticking up to minimise the off centre weight effect.

[murrayis]

The issue with using a disc is the centre if the cam gear is set back from the front.

The 2mm gap is the detection range and the finger needs to within the 2mm

[BlackBox]

Will this work with the standard vct? Instead of the adjustable cam gear

[GTSBoy]

The issue with using a disc is the centre if the cam gear is set back from the front.

Not a problem. Two piece centre, with a shim/washer behind. Spot weld together if paranoid, or make it out of 3mm sheet instead and machine some thickness off the bent up arms afterward.

[XKLABA]

The 2mm gap is the detection range and the finger needs to within the 2mm

This is what I was talking about, mine on my setup didn't read correctly till we got it out to exactly 2mm, any less and it would miss teeth, @ 1.1mm it would miss upto 9 in a roll at cranking speed, my ECU has a built in oscilloscope and that is how we found this issue

You only having one finger to look for probably won't be an issue though

[Ben C34]

Will this work with the standard vct? Instead of the adjustable cam gear

The vct is only on the inlet cam. The cas is run from the exhaust cam so no problems.

[murrayis]

Yes no problems with VCT.

Balance issues solved

Same volume as the finger and balanced to bring the weight closer to the centre when bent up into position.

[Ben C34]

Progress too slow......

Losing interest

[Sinista32]

stay off KB till work completed and kits in bubble wrap

[murrayis]

Sorry Ben.. please forgive me I'll try to finish the kit sooner!

[djr81]

It isn't volume it needs to be same moment of inertia. I=m x r x r where m is the mass in question and r the radius of the centre of the mass.

To work it out treat the bent up tab as one piece and the other section as a second piece. Add the results together.

[BlackBox]

So the cutout on the right side front timing cover is for the cas and not vct actuator?