burnt some e-proms (1st time)
Thread Starter
Burning Brakes
Joined: Sep 2000
Posts: 1,199
Likes: 1
From: NewCastle IN. USA
burnt some e-proms (1st time)
well the burning part is pretty simple.
so I've played with adjustments all weekend trying to see what some things do.
someone needs to compile a brief discription of what effects what.
I think the biggest thing I'm going to have trouble with is getting it richer above 5000rpm. the LV8 seems to drop off as rpms increase along with everything else. guess the stock motor wasn't going to do anything up there so its not something they considered it needed?
anybody got some ideas?
RJ
so I've played with adjustments all weekend trying to see what some things do.
someone needs to compile a brief discription of what effects what.
I think the biggest thing I'm going to have trouble with is getting it richer above 5000rpm. the LV8 seems to drop off as rpms increase along with everything else. guess the stock motor wasn't going to do anything up there so its not something they considered it needed?
anybody got some ideas?
RJ
Thread Starter
Burning Brakes
Joined: Sep 2000
Posts: 1,199
Likes: 1
From: NewCastle IN. USA
Re: burnt some e-proms (drive it)
I'm using tunercat with the 6E definition file (works with the APYP bin 1989). the vette is a 86 with stock ECM and major mod's ( 406ci, miniram, solid roller cam, ect ) .
I played with lots of stuff over the W/E just to see the effects, and I think the lower RPM stuff shouldn't be too tuff (time consuming though).
are you talking about the "P.E.%change to F/A ratio vs. RPM"?
no I don't have a wide band :sad: but I did have the vette dynoed with my old heads and they hooked up a wide band, I compared their readings to my O2 sensor readings so I think I've got a pretty good idea what to shoot for (I'll have it dynoed again later and do fine adjustments).
I played with lots of stuff over the W/E just to see the effects, and I think the lower RPM stuff shouldn't be too tuff (time consuming though).
are you talking about the "P.E.%change to F/A ratio vs. RPM"?
no I don't have a wide band :sad: but I did have the vette dynoed with my old heads and they hooked up a wide band, I compared their readings to my O2 sensor readings so I think I've got a pretty good idea what to shoot for (I'll have it dynoed again later and do fine adjustments).
Melting Slicks
Joined: Apr 2001
Posts: 2,123
Likes: 225
From: Ca.
Re: burnt some e-proms (ol,RJ)
I'm using tunercat with the 6E definition file (works with the APYP bin 1989). the vette is a 86 with stock ECM and major mod's ( 406ci, miniram, solid roller cam, ect ) .
I played with lots of stuff over the W/E just to see the effects, and I think the lower RPM stuff shouldn't be too tuff (time consuming though).
are you talking about the "P.E.%change to F/A ratio vs. RPM"?
no I don't have a wide band :sad: but I did have the vette dynoed with my old heads and they hooked up a wide band, I compared their readings to my O2 sensor readings so I think I've got a pretty good idea what to shoot for (I'll have it dynoed again later and do fine adjustments).
I played with lots of stuff over the W/E just to see the effects, and I think the lower RPM stuff shouldn't be too tuff (time consuming though).
are you talking about the "P.E.%change to F/A ratio vs. RPM"?
no I don't have a wide band :sad: but I did have the vette dynoed with my old heads and they hooked up a wide band, I compared their readings to my O2 sensor readings so I think I've got a pretty good idea what to shoot for (I'll have it dynoed again later and do fine adjustments).
Another table towork on-especially with the mini-ram is "pump shot"-lv8 accel enrich factor vs delta lv8. Increase it at 64 and up-less at 64. I've gone up by 30% to avoid a lean spike-again the wide band is invaluable!
If you just lived a little closer to me......I'd say lets use mine! BTW-that offer is still good for anyone in Sothern Calif. area-if you want to tune with my wide band we could arrange a meet!
You have diacom or similar? That'll be a must too....
Sounds like a strong combo! Be sure and post some #'s when you can! :cheers:
Thread Starter
Burning Brakes
Joined: Sep 2000
Posts: 1,199
Likes: 1
From: NewCastle IN. USA
Re: burnt some e-proms (drive it)
cool :cool:
yes, I have diacom. and it was showing a lean spike so I understand what you saying there..I can see where a W.B. would show it better as I get closer to correct (hmm, maybe I can talk a friend into going in on one).
with the "old heads" it dyno'd : 385RWTQ, 350RWHP (only took it to 6000rpm and the HP was flat from 4800 to 5800, started going alittle lean after that) it also ran a 13.2 @ 109mph (poor weather).
With the new heads and old e-prom it ran 12.7 @113mph (fair weather and had the fuel pressure up).
on a side note, all the above were way rich around 4000rpm (10.5:1).
yes, I have diacom. and it was showing a lean spike so I understand what you saying there..I can see where a W.B. would show it better as I get closer to correct (hmm, maybe I can talk a friend into going in on one).
with the "old heads" it dyno'd : 385RWTQ, 350RWHP (only took it to 6000rpm and the HP was flat from 4800 to 5800, started going alittle lean after that) it also ran a 13.2 @ 109mph (poor weather).
With the new heads and old e-prom it ran 12.7 @113mph (fair weather and had the fuel pressure up).
on a side note, all the above were way rich around 4000rpm (10.5:1).
Melting Slicks
Joined: Apr 2001
Posts: 2,123
Likes: 225
From: Ca.
Re: burnt some e-proms (ol,RJ)
on a side note, all the above were way rich around 4000rpm (10.5:1).[/QUOTE]
Hey, good #'s!
On the 10.5:1-is that from the commanded F/A that shows in diacom?
I've found that it doesn't correlate well at all with the actual F/A via wide band.
Thread Starter
Burning Brakes
Joined: Sep 2000
Posts: 1,199
Likes: 1
From: NewCastle IN. USA
Re: burnt some e-proms (drive it)
no, that was what the wide band was showing.
it dipped to 10.5 at 4000rpm then climbed to 12.8 by 6000rpm.
rich in the middle, lean on top.
unfortunately I can't use that chip as a starting point :nonod: (its formato's) so I'm starting from scratch.
but it gives me a good idea about where I need the pulse widths to be and what fuel pressure I'm going to need to run in order to keep the inj duty cycle safe at ahigh RPM's.
it dipped to 10.5 at 4000rpm then climbed to 12.8 by 6000rpm.
rich in the middle, lean on top.
unfortunately I can't use that chip as a starting point :nonod: (its formato's) so I'm starting from scratch.
but it gives me a good idea about where I need the pulse widths to be and what fuel pressure I'm going to need to run in order to keep the inj duty cycle safe at ahigh RPM's.
