MSD Stacker gains and GMS looses

[99svtvert]

Regarding the FR500 modded NA 4.6 I have been working on (power #'s based on 2 pulls each):

Runner control via MSD Window Switch
Runner control 0-2500 Short Runners (noise control)
Runner control 2501-4700 Long Runners (torque
Runner control 4701-7500+ Short Runners (horsepower)

Standard ignition

2500 RPM 298 TQ/ 179 HP
3000 RPM 320 TQ/ 200 HP
3500 RPM 347 TQ/ 241 HP
4000 RPM 351 TQ/ 293 HP
4500 RPM 359 TQ/ 339 HP
5000 RPM 362 TQ/ 345 HP
5500 RPM 341 TQ/ 368 HP
6000 RPM 326 TQ/ 374 HP
6500 RPM 315 TQ/ 379 HP
7000 RPM 299 TQ/ 395 HP
7300 RPM 289 TQ/ 401.6 HP (still making power)

+ GMS COP

2500 RPM 299 TQ/ 180 HP
3000 RPM 320 TQ/ 201 HP
3500 RPM 346 TQ/ 240 HP
4000 RPM 349 TQ/ 292 HP
4500 RPM 357 TQ/ 338 HP
5000 RPM 360 TQ/ 341 HP
5500 RPM 340 TQ/ 365 HP
6000 RPM 325 TQ/ 372 HP
6500 RPM 312 TQ/ 375 HP
7000 RPM 297 TQ/ 395 HP
7300 RPM 287 TQ/ 398 HP (not making power - flatline then decreasing)

- GMS COP + MSD Stacker (which came with the car - I never used it before)


2500 RPM 298 TQ/ 181 HP
3000 RPM 322 TQ/ 202 HP
3500 RPM 349 TQ/ 242 HP
4000 RPM 354 TQ/ 295 HP
4500 RPM 363 TQ/ 342 HP
5000 RPM 361 TQ/ 348 HP
5500 RPM 341 TQ/ 368 HP
6000 RPM 327 TQ/ 377 HP
6500 RPM 312 TQ/ 382 HP
7000 RPM 303 TQ/ 398 HP
7300 RPM 300 TQ/ 406 HP (still making power)

What is this all about ? Any explanations ? It's not much but a Naz says, "every little bit helps".

 

[mijon61]

first run was "stock"
second run was with GMS COP
third run you went back to stock COP's but put a Stacker 8 on it?
Did you mess with the plug gap?

 

[99svtvert]

Right first run was FR500 components; Cobra stock ignition; second was GMS COP (did mess with the plug gap). The MSD Stacker on stock COP's (GMS COPs removed) made a nice difference at the top end mainly. To be fair though, I do want to spend a lot more time with the GMS COP in about 2 weeks because of the potential.

No time til Oct. 18.

 

[01 SN8K]

Right first run was FR500 components; Cobra stock ignition; second was GMS COP (did mess with the plug gap). The MSD Stacker on stock COP's (GMS COPs removed) made a nice difference at the top end mainly. To be fair though, I do want to spend a lot more time with the GMS COP in about 2 weeks because of the potential.

No time til Oct. 18.

Did you reverse the polaritys with the GMS COPS?

I just installed the GMS COPS in my car. I opened up the gap from .032 to .037 and have no blowout. Seat of the pants tells me that it pulls a little harder. It definatley drives smoother mainly due to opening up the plug gap. I still have to get the car dynoed to log any differences.

 

[mijon61]

Did you reverse the polaritys with the GMS COPS?

I just installed the GMS COPS in my car. I opened up the gap from .032 to .037 and have no blowout. Seat of the pants tells me that it pulls a little harder. It definatley drives smoother mainly due to opening up the plug gap. I still have to get the car dynoed to log any differences.

I opened my gap to .045 with no blowout and GMS COP's. I used the Stacker 8 and had blowout. Go figure. Took it off.

 

[99svtvert]

Good idea - I'll try that.

 

[01cobravortech]

Stupid question, but I've never experienced blow out before. What does it sound like? Do hear misfire? What are the signs when blowout takes place?
*Sorry don't mean to thread hijack*

 

[mijon61]

Don't really hear it. It is misfire on one or more cylinders. No smoothe and steady power increase but quite jerky.

 

[01 SN8K]

I opened my gap to .045 with no blowout and GMS COP's. I used the Stacker 8 and had blowout. Go figure. Took it off.

I want to take mine to .040 next. I probably won't change them again until I get to a dyno.