Is The Rb20det A Batch-fire Or Sequential Fire System?

[PROJECTRB240SX]

IS THE IGNITION SYSTEM OF THE RB20DET BATCH-FIRE OR SEQUENTIAL? I'M GOING STNADALONE AND WONDERING ABOUT THE IGNITION SYSTEM..... I WAS TOLD ITS A BATCH-FIRE SYSTEM BY TWO PEOPLE BUT WITH ALL THE KNOWLEDGE ON THIS FORUM I JUST THOUGH I'D CONFIRM IT. IF ITS SEQUENTIAL I WANT TO RETAIN THE SEQUENTIAL SETUP IF ITS BATCH-FIRE I'M NOT TOO TERRIBLY WORRIED ABOUT GOING SEQUENTIAL JUST YET.... I JUST WANT TO GET MINE TO RUN PROPERLY AND FINE TUNED FOR SOME ADDED POWER.

[Wulfgang]

Ignition system? There is no such thing as a batch-fire ignition.

So I assume you mean fuel injection. It would be very unlikely that the RB20 uses a batch-fire (except at high revs, where almost all ECU's batch fire), since both the KA24E and KA24DE use sequential injection. Going batch-fire would be like stepping back into the early 80's for Nissan.

[PROJECTRB240SX]

Quote »The LT8/LTX8 is the simplest of Microtech's offerings, with four injector and four coil drivers, ideal for running a four-cylinder or two-rotor rotary in 3D sequential injection and spark mode (up to 8 cyl and 4 rotor in batch/wastespark). Comes configured to use stock coils as the LT8. The LTX8 has an on-board igniter which allows use of external Bosch coils. [/quote]

http://www.microtechusa.com/computers.html

Batch ignition is also called wasted spark..... this is what I was asking.

[Joe]

Ignition system? There is no such thing as a batch-fire ignition.

So I assume you mean fuel injection. It would be very unlikely that the RB20 uses a batch-fire (except at high revs, where almost all ECU's batch fire), since both the KA24E and KA24DE use sequential injection. Going batch-fire would be like stepping back into the early 80's for Nissan.

yes there is, 2 plug wires work off 1 coil pack. each time a piston reaches TDC the spark is fired (on intake and exhaust strokes) it reduces emissions on most cars by a good margin. as far as i know the RB's are NOT a waste spark system.

[PROJECTRB240SX]

THANKS JOE....

[Joe]

NP just wish i had a for sure answer.

[PROJECTRB240SX]

I WAS TOLD BY TWO PEOPLE ON SDU THAT IS WAS A BATCH-FIRE SYSTEM..... IT WAS JUST THAT THESE PEOPLE WERE NEVER REALLY ON THE BOARD SO I DIDN'T KNOW IF THEY WERE FULL OF IT AND DIDN'T ACTUALLY KNOW OR IF IT WAS THE TRUTH.

[Joe]

i highly dobut it is, the waste spark is used for emissions purposes. since there isnt any in japan, why run one?

[PROJECTRB240SX]

ITS CHEAPER ALSO.... THE THING THAT GOT ME WONDERING WAS THE FACT THAT IF IT WAS A WASTED-SPARK SYSTEM WHY WOULD THEY WASTE THE MONEY ON 6 COIL PACKS?

[Wulfgang]

They wouldn't. Ok, so you're talking about wasted-spark. "Sequential" and "batch" used to mean fuel injection systems. I guess people call it whatever they want now.

But it would be stupid to fire coils on empty cylinders with a coil-on-plug system. The advantage of wasted-spark systems is that the coils cost half as much. There is no emissions advantage that I am aware of.

[PROJECTRB240SX]

ITS ALWAYS BEEN CALLED BATCH-FIRE IGNITION SYSTEMS AS FAR AS I REMEMBER..... A WASTED SPARK SYSTEM ON THE RB WOULD BE CYL 1 AND 4 SAME FIRE TIME, CYL 2/5, AND CYL 3/6.

[BoostFab]

IS THE IGNITION SYSTEM OF THE RB20DET BATCH-FIRE OR SEQUENTIAL?

probably you're referring to direct fire?nissan uses direct fire, on the s15 sr20det, i'm assuming it's the same case for the rb's

rb20det firing order, Firing order 1-5 3-6 2-4

[WDRacing]

Grab the #1 coil pack in your left hand and the #5 in your right, now have a friend turn the motor over. If you get shocked in both hands at the same time then its sequential...lol.

[PROJECTRB240SX]

LOL, YEAH I'LL JUMP RIGHT ON THAT TEST.

[WDRacing]

Ok OK, have your buddy hold the coils, you crank it over. Why don't you have Cam come over for that part...lol.

[PROJECTRB240SX]

LOL...... NAH, I'LL HAVE MY BROTHER HOLD IT THE NEXT TIME HE PISSES ME OFF.

SPEAKING OF CAM, I GUESS HE WRECKED A SKYLINE ON MONDAY.... AT LEAST THATS WHAT ONE OF HIS THREADS ON THAT WANNABE SITE SAYS.

[WDRacing]

Hmm...bummer. Wonder if he had it insured.

[PROJECTRB240SX]

I DUNNO..... BUT, I HOPE AFTER THAT ACCIDENT HE DISCLOSES THAT TO THE BUYER CAUSE HITTING A CONCRETE WALL AT THOSE SPEEDS IS GOING TO CAUSE ALOT OF DAMAGE.

[Joe]

damage wasnt serious, a retarded ricer in a focus ran him off the road. worst part of the damage is the radiator support needs to be replaced.

[NISMO_RB25]

I have this mental image of Cam pulling up to a light in a Skyline, and a riced out Focus pulling up next to him. Light turns green, and the focus lays down all of its 102 hp to the front wheel and torque steers right towards him.

I would probably have to beat that punk to death just for causing any damage to a Skyline.

[WDRacing]

Light turns green, and the focus lays down all of its 102 hp to the front wheel and torque steers right towards him.

LMFAO

[candela]

is the RB20 coil on plug?

I dont think any coil on plug system wastes spark... that makes no sense. Am I thinking abotu this the wrong way (btw I havent seen an RB20 in person before :p so i am asking, not tryign to sound like a jackass)?

If there are individual coils for each cylinder doesnt that answer yoru question? If there are only 3 coil packs then that shoudl tell you that it fires two at the same time...

[WDRacing]

Coil on plug, not batch fire...

[themadscientist]

i highly dobut it is, the waste spark is used for emissions purposes. since there isnt any in japan, why run one?

There is emmisions testing in Japan, it's just not as stringent as the states.

I am under the definate impression it's a sequential ignition otherwise why would there be six channels on the firing box?

[PROJECTRB240SX]

THANKS MAD..... AND THANK YOU CANDELA.

ALTHOUGH IT IS POSSIBLE TO HAVE A WASTED SPARK SYSTEM WITH COIL ON PLUG..... THE QUESTION IS WHY?

I JUST WANTED TO CONFIRM MY DISBELIEF, THANK YOU FOR HELPING ME.