Grantspec's supercharged KA24DE coupe build w/ Megasquirt-II

[ConeDodger240]

You've created a mutt!!


I can't wait for the day this thing is running full song, and I have faith you will get it there brother-man, just don't give in to the nissan voodoo!

Does this ignition system effect the timing advance at all or is that all controlled within the megasquirt system?

[GrantSpec]

Engine management, dope, built it yourself, bragging rights.

Not until it runs...

You've created a mutt!!


I can't wait for the day this thing is running full song, and I have faith you will get it there brother-man, just don't give in to the nissan voodoo!

Does this ignition system effect the timing advance at all or is that all controlled within the megasquirt system?

I will be able to fully program the ignition advance in a 12x12 table based on RPM and manifold pressure.

[Ichi-Go]

Does this ignition system effect the timing advance at all or is that all controlled within the megasquirt system?

It controls the realm of space and time The spark is not advanced, the spark actually travels back in time to when the piston is approaching top dead center. It is called top dead center becuase the megasquirt has already placed baby seals that it shrunk down to in fit in the combustion chamber on very center of the piston.The time traveling spark is controlled to the millisecond making the maximum cylinder pressure occur at or shortly after the piston has reached the top of its travel clubbing the baby seal with its fury. When you change the maps you also change the way diamonds are made, the way woman flock to your side, and the greatness that is taco bell 2 dollar combos. All of these things cannot be explained to mortals, they have a mystical magical aura that only the megasquirt can control.

[ConeDodger240]

Does this ignition system effect the timing advance at all or is that all controlled within the megasquirt system?

It controls the realm of space and time The spark is not advanced, the spark actually travels back in time to when the piston is approaching top dead center. It is called top dead center becuase the megasquirt has already placed baby seals that it shrunk down to in fit in the combustion chamber on very center of the piston.The time traveling spark is controlled to the millisecond making the maximum cylinder pressure occur at or shortly after the piston has reached the top of its travel clubbing the baby seal with its fury. When you change the maps you also change the way diamonds are made, the way woman flock to your side, and the greatness that is taco bell 2 dollar combos. All of these things cannot be explained to mortals, they have a mystical magical aura that only the megasquirt can control.

oh pff I understand completely now! Man i'd love to get me some of them shrunken baby seals!

[GrantSpec]

It controls the realm of space and time The spark is not advanced, the spark actually travels back in time to when the piston is approaching top dead center. It is called top dead center becuase the megasquirt has already placed baby seals that it shrunk down to in fit in the combustion chamber on very center of the piston.The time traveling spark is controlled to the millisecond making the maximum cylinder pressure occur at or shortly after the piston has reached the top of its travel clubbing the baby seal with its fury. When you change the maps you also change the way diamonds are made, the way woman flock to your side, and the greatness that is taco bell 2 dollar combos. All of these things cannot be explained to mortals, they have a mystical magical aura that only the megasquirt can control.

[Gatts]

No doubt man! I think that you will be more than happy with going Waste Spark. I have been happy with mine with no issues. I'm using GM coils though. Either way, repair parts are plentiful and cheap as you mentioned and it's easier to troubleshoot IMO. (Depending on what management you started with.)

[GrantSpec]

Did you use an HEI module to control your GM coils? Or are they controlled directly by your standalone?

[Gatts]

I use a driver which comes as an option with SDS EMS... the only other components in my ignition circuit is my ECU and Hall Sensor (trigger sensor).

Edit: Btw, I meant to mention that I'm pretty sure that SDS's driver is their version of an HEI module.

[GrantSpec]

Running!






On the bench stimulator...


Shattered_z from this forum let me borrow his stimulator board which simulates the engine for the megasquirt. Fired it up and tinkered with it for a while and it seems to be working perfect. All sensors are reading appropriately and respond correctly to the knobs that adjust the sensor input signals on the stim board. Thanks shattered_z you the man!

I drew up a trigger wheel on AutoCAD that I will fit to my stock crank pulley. I found a place locally that does waterjetting and they are cutting my design out of 1/4 inch mild steel for me. It will be ready for pick-up tomorrow . This is the last major piece I need before I can start wiring it to my engine.

[neverlift]

should have them make another trigg wheel and try to regain some of the cost to you, I'm sure on the bigger boards someone is looking for a trig wheel :thumb

now hurry up and get it going!

[GrantSpec]

should have them make another trigg wheel and try to regain some of the cost to you, I'm sure on the bigger boards someone is looking for a trig wheel :thumb

now hurry up and get it going!

This local place is making it for 50$.

But I found a place in Virginia that would do them for 29$ + shipping if I ordered more than one. The advantage to the local place is I can swing by and pick it up after work tomorrow.

I still have the CAD file though so If anyone ever wants one I can provide them with the file.

[neverlift]

how about a slightly smaller one for the asp pulley I love that thing or the heavy white bunny would probably make 10psi in N,
well stop typing and get it on the road...

[GrantSpec]

Update! I now have most all of the parts I need to get this project moving.

I drew this trigger wheel up on AutoCAD to fit my KA crank pulley


I found a couple shops capable of waterjet cutting and recieved some quotes for cutting my design out of 1/4 in mild steel. I ended up finding a shop in Jacksonville who specializes in stone cutting who was more than willing to take on the project. $50 later they made this for me.


The next step was finding a machine shop to lathe the AC compressor portion of my KA crank pulley down to fit the trigger wheel I designed onto it. Most of the shops in the area are not "Job" shops and were not willing to take on my small project. J.O.A.T in the industrial loop fortunately was up for the task. The guy who runs this place is awesome. We had a mishap on the first attempt but I brought him another pulley and he did a flawless job on it. The trigger wheel was a snug press fit on the pulley which is exactly what I wanted. JOAT sells Earl's fittings and high performance parts and will give a price comparable to that of summit racing. Please support this guy with all of your AN plumbing/machine work/performance part needs, he is awesome.

J.O.A.T Inc.
98 Industrial Loop North
Orange Park, FL 32073-6262
(904) 269-7047 guys name is Ben Borden





You can see in the pictures the trigger wheel sits on the backside of the pulley. I timed the wheel in such a way that the V/R sensor will be mounted on the exhaust side of the engine. I will bolt the bracket for the sensor where the A/C pulley used to mount.

Stay Tuned!

[SloPokS13]

That is freaking awesome dude, I love how your car just keeps getting better and better! Keep up the awesome work man!

[neverlift]

sick/

so would joat machine some weight out of a flywheel? If I could get a d21 fw down to a stock(or lower) ka weight I would be ecstatic.

endless win man

[AndrewHuffman]

sick/

how will you line the gear be at TDC? And I guess your going to weld it in place? Are you getting it balanced and if so by who

[GrantSpec]

Thanks everyone!

how will you line the gear be at TDC? And I guess your going to weld it in place? Are you getting it balanced and if so by who

The timing marks are still on the pulley. All I had to do to line it up was put the engine at TDC and count 9 teeth on the pulley before the missing tooth then put that 9th tooth about where I want the sensor to be. When I make the sensor bracket I just have to make sure the sensor lines exactly up with the 9th tooth. In this orientation the engine will fire at 10* BTDC without any distributor signal. This is a built in feature in the EDIS box that is sort of a "limp home" mode. When the EDIS module receives a spark angle signal from megasquirt it will revert back to whatever advance megasquirt tells it to run.

I may throw a few tack welds on it but honestly I really dont think it needs it. I heated the ring and froze the pulley when I assembled it and still had to hammer the shit out of it to get it on. It's a super tight pressed fit. I'm not going to have the pulley balanced. I am, however, going to drill holes with the volume equal to one tooths worth of material 180* from the missing tooth. This should have it balanced pretty well.

[Nissankat]

Pulley is looking good and Joat is the man.

I think I would try to affix that trigger wheel in some way though. It may seem snug but if it does manage to move then it could be catastrophic. Maybe you can put a few screws in it somehow if you do not want to tack it.

[just_wanna_drive]

Dang man... U are my HERO!

Nice work man, I'm really looking forward to future post on this awesome car and a eventual dyno tune.

I really don't think the tac's or anything will be nessary w/ the sweat fit IMHO. TIG weld it if anything tho (w/o adding any other material.)

[orion]

Great job on the trigger wheel...

- Brian