Dyno gurus, I have a question....VIDEO

Tippy · 11-09-2014, 04:40 PM

So, I finally got to the dyno today, but it didn't work out.

From 4K to over 6K, the graph did not plot at all.

Question is, does ignition "flame-out" cause the Dynojet to not read out?

I've had a flame-out issue or ignition cutout since I went to 1.4 bar of boost probably linked to my 20+ year old coil pack.

This system only plots hp, so it makes sense that missing RPM from cutout would prevent the correct calculations for hp as the computer has nothing to work from.

Vid showing 1 of 3 runs.......all with similar readings missing and erratic readings.

3.4L BW S366 @ 20PSI - YouTube

Anyone experience this? Couldn't find anything on the web.

Evan Fullerton · 11-09-2014, 04:57 PM

On any of the DynoJets I have used, loss of RPM signal would default to a torque vs. road speed graph. I would guess that they could be configured to do other things under those circumstance though. If you hunt around enough in the software, your torque vs. road speed data should be stored in there somewhere and you can interpolate it to RPM if you so desire.

Tippy · 11-09-2014, 05:41 PM

Quote:

Originally Posted by Evan Fullerton

On any of the DynoJets I have used, loss of RPM signal would default to a torque vs. road speed graph. I would guess that they could be configured to do other things under those circumstance though. If you hunt around enough in the software, your torque vs. road speed data should be stored in there somewhere and you can interpolate it to RPM if you so desire.

Hello Evan, these guys just give you a printout. No real time to dig in as these guys go to our local cars and coffee and had many people waiting in line.

Hmmm, too bad it wasn't at a shop to try to figure out another method to generate the correct numbers.

GJF · 11-09-2014, 05:52 PM

What's going on with that semi surge before full boost? Are your AFR's linear on boost? Your running wasted spark? Plug gap? This only started happening when running 20psi?

Tippy · 11-09-2014, 06:05 PM

Quote:

Originally Posted by GJF

What's going on with that semi surge before full boost? Are your AFR's linear on boost? Your running wasted spark? Plug gap? This only started happening when running 20psi?

You know, I've wondered the same. I always wondered if it's the MAP getting maxed out. It's been awhile since I logged, but I believe the AFR's go richer fairly linear.

Wasted spark with Ford EDIS ignition.

Plug gap is 0.025".

And yes, once it ran a Holset HX40, I kicked up boost from 1 to 1.4. It happened (hard hitting surge) around this time IIRC.

GJF · 07:15 PM

What are you running for fuel? And what size injectors? And what is it reading for AFR at 20? Did you ever load that timing map I sent you?

Tippy · 11-10-2014, 05:00 AM

In order of questions:

93 octane, 80lb Dekas, 11.7 AFR, no I did not. Let me revisit.

GJF · 11-10-2014, 05:21 AM

Try fattening it at 20 just a tad.

Tippy · 11-10-2014, 05:51 AM

Quote:

Try fattening it at 20 just a tad.

Low 11's?

GJF · 11-10-2014, 05:53 AM

Just a tad 11.5, no need to flood her...

GJF · 11-10-2014, 05:54 AM

Does it behave the same at 18psi or is it just 20?

Tippy · 11-10-2014, 06:05 AM

Quote:

Just a tad 11.5, no need to flood her...

LOL, ok

GJF · 11-10-2014, 06:05 AM

I had a flame-out problem a while back it end up being the plugs were too cold (BKR9EIX I like these as they have 5/8 hex instead of 13/16). I had this happen running NGK iridium's but went back to Bosch Silvers. I think if I would have dropped the range to 8's in NGK it would have netted me the same results which is what I'll try next set BKR8EIX stk#2668

Tippy · 11-10-2014, 06:06 AM

Quote:

Does it behave the same at 18psi or is it just 20?

I believe it does not. Seemed to be pretty smooth at 15-17 with the 1 bar WG springs.

Tippy · 11-10-2014, 06:07 AM

Quote:

I had a flame-out problem a while back it end up being the plugs were too cold (BKR9EIX I like these as they have 5/8 hex instead of 13/16). I had this happen running NGK iridium's but went back to Bosch Silvers. I think if I would have dropped the range to 8's in NGK it would have netted me the same results which is what I'll try next set BKR8EIX stk#2668

I can't remember if I'm running NGK or Bosch right now.

What do you recommend from NGK? I'm not a fan of the Bosch tax....

GJF · 11-10-2014, 07:08 AM

What plug (stock number) are you running now? Your single plug?

Tippy · 11-10-2014, 07:29 AM

Single plug. I believe I went one range colder over what the Pelicanites recommended for a stock Carrera 3.2.

GJF · 11-10-2014, 07:47 AM

SKU: #BPR7EIX ITEM : # NGK4055 This is 1 range colder than stock. Typically 1 range for every 100 HP over stock. You could run 8's. 8's are equivalent to Bosch 3's

Tippy · 11-10-2014, 08:42 AM

8's, I believe I'm running.

GJF · 11-10-2014, 09:43 AM

BKR8EIX stk#2668 is the info for 8's. good for 200+ over stock. 9's are just too cold for even over 1100HP on toasty Florida days. I think even Goran had issues with 9's over on his side of the world. It is much cooler there. Either a crotch rocket shop typically stocks these but at a premium. Or buy off eBay for a song & dance.