the fd twin turbo need this igniter to run the colis http://www.ebay.com/itm/Mazda-RX7-Ig...r#ht_500wt_949

they dond have built in igniters

 

I should be able to get a look at your tune later. You do need an ignitor (which came with the FD) to run the FD coils.

I was under the impression they were all part of the same coil assembly from the 2 or 3 FDs I've seen but I may be wrong.

Ken

 

OK The coils are runing. The spark plugs and injektors firing in test mode. TPS and Sensors works. I think i'm ready for the first start.

I've seen it is only sequential injection possible. Which angle do i need in the map?
if i start the engine i see ready and synced. But it will not start.

My Cas sensor is on the excentric shaft with a12 toothed wheel and 1 cam teeth. cam signal every 360 degree. (Not 720 degree like 24/1) i think. similar to 24 toothed nipodesnso wheel with 2 cam teeth.

My settings:
trigger wheel teeth : 24
Tooth#1 angle: i don't know
Main wheel speed: cam
Second trigger: Rising edge
and every rotation of: crank

I hope i'm right. Does the distributor CAS have half the speed of the crank CAS like piston engines or not . Idon't know.

Dirk

 

OK The coils are runing. The spark plugs and injektors firing in test mode. TPS and Sensors works. I think i'm ready for the first start.

I've seen it is only sequential injection possible. Which angle do i need in the map?
if i start the engine i see ready and synced. But it will not start.

My Cas sensor is on the excentric shaft with a12 toothed wheel and 1 cam teeth. cam signal every 360 degree. (Not 720 degree like 24/1) i think. similar to 24 toothed nipodesnso wheel with 2 cam teeth.

My settings:
trigger wheel teeth : 24
Tooth#1 angle: i don't know
Main wheel speed: cam
Second trigger: Rising edge
and every rotation of: crank

I hope i'm right. Does the distributor CAS have half the speed of the crank CAS like piston engines or not . Idon't know.

Dirk

 

Tooth #1 angle shoud be 5 deg. That should get the engine started, then you can check the timing with a light.

Ken

 

post a video when it starts!!!!

 

wish to follow this thread.

 

OK It will BUT

After the instalation of a VR /Hall Board both signals are absolutly clear without the need of adjusting.

The engine wants to start but the firing order is wrong. My FD REW CAS is a 12/1 wheel at the excentric shaft and it rotate double fast as the 24/1 FC CAS.

So the megasquirt reads 24/2 with 2 turns of the excentric shaft and not 24/1

Does the megasquirt support the 12/1 wheel and what ignition settings do i need .

Thanks for help
Dirk

 

My tune.

Dirk

 

The same exact settings will work on both the FD engine and the FC engine as far as the wheel goes.

Both show up as 12+1... (though on the FC, since it actually has 24 teeth, you can specify that, then say there's 1 2nd trigger per crank rotation, which ends up meaning the same thing as 12+1).

So you can say 12+1 with primary at crank speed and secondary on every rotation of the crank, or you can say 24+1 with primary at cam speed, and secondary on every rotation of the crank.

Ken

 

Do i need to set staged injection disable.

my wiring:
Inj A is front primary
Inj B is rear primary
Inj c is front secondary
Inj D is rear secondary

When i cranking the engine Inj A and B is working. But what settings do i need for Inj C and D
Later on boost i need 4 more injectors in my E&J Throttle How to wire them?

Dirk

 

If the injectors are high Z wire 2 per chanell to use the E&J throttle

 

OK Thanks all. The engine is running. There are some problems. The FD Coils will not work with MS3x Board. I use a set of 4 Bosch coils also there was trouble with the cam sensor. I use a VW vr senor. Now it is running without problems

The megasquirt MS3 is a nice choice with much advanced settings and helpfull tools for drag race.

Thaks for your help. If someone ask a question i will answer fast.

Dirk

 

So the "factory CAS" of the 13B TT FD3S will not work with megasquirt 3? Also the original "factory COILS" of the 13B TT FD3S will not work with megasquirt 3?

Ill be doing a megasquirt install with my Rx-7 FD3S with the original 13B Twin Turbo engine....and I want to make it a plug and play thing as much as possible...hope you can help or anyone here....Thanks

 

It absolutely will. It's a simple 2 VR setup with a 12 tooth wheel and a 1 tooth. 12+1 exactly the same as the FC (24 + 2) as previously mentioned in this thread.

Coils I don't know, but I'd be highly surprised if they didn't. Seems like they should since they have an ignitor module that works with every other EMS. Since FD trailing is supported in every other Megasquirt...


Good freaking luck. You'll need to study the FD training manual to determine how many outputs you will need to run the sequential twins. It's certainly do-able but will take some research and them some experimentation with solenoid triggers to get it running smoothly.

 

The CAS will work. I changed the Cam VR Sensor because i had no clean signal. I use now a VW VR Sensor but the FD Crank Sensor works. Nobody know why it don't work. A reason is very long cable because MS3 in front engine in rear.

The FD coils will work with the stock ignitor box not with Bosch ignitors like mine.

Stock coils work in FD mode and now i run 4 coils with coil on plug. It works too but in Rotary settings the fd mode will not grey out. No problem.

I wish you good luck. If the wiring is done and works you have a nice new playstation

Dirk

P.S. Ignition settings

toothed wheel
skip 2
Rising Edge
Going High
Wasted spark
MS3x spark
MS3 cam in
Dual Wheel
24
Tooth#1 you need to messure wheel mark is 20 Deg ATDC
cam wheel
rising edge
Crank

You need the newest firmware to support FD!!!!

 

Thanks for the reply

But a conversion to a non sequential twin turbo will make things easier right? As the solenoids that control the turbo will be eliminated...and a manual boost controller can be fitted?

 

Many thanks for the reply...help

 

Or you can let the MS control boost.

Ken

 

Yup

Or study how the solenoids that control the sequential are activated every run....RPM points...using LED's to monitor its function

Why is there so very few people with Rx-7 FD's use the Megasquirt system...unlike the FC 13B?

I really want to remove the Catalytic converter and have a programmable ECU that controls the required fuel for the excess boost it will create from the removal of the catalytic converter.

And I want to use Megasquirt since its cheaper and a DIY thing...and I want to practice more in using the Megasquirt

 

That will make things easier but you lose the advantage of the twin turbos. Why use a manual boost controller? With the addition of a solenoid, the Megasquirt has a built in boost controller. There is a user on RCC called "TitaniumTT" whom has a working Cosmo sequential system controlled by a Motec. He may be able to provide some assistance as far as RPM and load activation points, solenoid layout, etc. Just don't tell him you have a Megasquirt because he's very hostile to it based on his lack of understanding (he believes that a Megasquirt user must "write code" to use the ECU).

FD people tend to use only a narrow range of products which for the most part, are bolt on. As such the Megasquirt is sort of considered a "hobby" ECU while the commercial, less capable ECUs are considered "serious" ECUs.

You'll find that the price to install ANY ECU is about the same.