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Old 04-12-2021, 05:32 AM   #2031
tomm.brz
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try to flash his -2% tune
and reduce adv timing because they are too high
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Old 04-12-2021, 05:42 AM   #2032
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Originally Posted by tomm.brz View Post
try to flash his -2% tune
and reduce adv timing because they are too high
Thx for that. What are you thoughts on the Eng load @ 3800, as I will still get a rich dip at 3800rpm?

Last edited by 73TORANA!; 04-12-2021 at 06:19 AM.
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Old 04-12-2021, 06:19 AM   #2033
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first try the -2%, then if in the torque dip is still rich, you can try lowering engine load limits (which will be healthy since the -2% will have a bit lower engine load overall)
You can try fix it also rescaling the maf in open loop a bit better
and to make it leaner through the table "Engine load compensation (MP)" in that range (lower values to make it leaner)

Reduce PI% at high rpm or lower adv timing or will be even more knocky

you could keep this richer tune and just remove timing where it knocks, no big difference.. i had just a quick look at the logs when i first answered,
but the -2% worth a try to me
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Old 04-12-2021, 06:32 AM   #2034
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Quote:
Originally Posted by tomm.brz View Post
first try the -2%, then if in the torque dip is still rich, you can try lowering engine load limits (which will be healthy since the -2% will have a bit lower engine load overall)
You can try fix it also rescaling the maf in open loop a bit better
and to make it leaner through the table "Engine load compensation (MP)" in that range (lower values to make it leaner)

Reduce PI% at high rpm or lower adv timing or will be even more knocky

you could keep this richer tune and just remove timing where it knocks, no big difference.. i had just a quick look at the logs when i first answered,
but the -2% worth a try to me
Thx for in depth reply. Will try 2% and put a few tanks of gas through it and log again. Then try what you advise before making too many changes at once. Im still learning. Thx for your help. Cheers
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Old 04-26-2021, 02:26 PM   #2035
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I could really use some help. I feel the car is running way too rich. I changed to the stage 2+ 4.03 tune, from the 4.02. I ran a data log on the highway with 3rd gear pulls on the onramps. Could someone take a look? I feel like the front pipe cat is getting really hot, from the smell of it. The car has a an uncatted UEL header and a Perrin intake, both were on there when I bought the car. I want to be on the track next weekend, but I don't think the current fuel mappings are going to work.

https://drive.google.com/file/d/1ukM...ew?usp=sharing


https://datazap.me/u/derekbarker3gma...y?log=0&data=1

Last edited by Silver49; 04-26-2021 at 09:42 PM.
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Old 04-26-2021, 07:40 PM   #2036
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please upload to datazap.me and link here ..
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Old 04-26-2021, 09:42 PM   #2037
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please upload to datazap.me and link here ..
I updated my post to include it now.

Thanks
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Old 04-26-2021, 10:43 PM   #2038
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yes quite rich
a maf rescaling would help
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Old 04-27-2021, 08:36 AM   #2039
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Quote:
Originally Posted by tomm.brz View Post
yes quite rich
a maf rescaling would help

So on that note, I believe my car came with both the 2.75" and 3" Perrin. Or does the size just relate to the silicone part of the intake tube? I added a picture as well. Again any help would be awesome since I didn't buy these parts. Assuming it is both, would I just use the 3" MAF scaling tables or is there a different one since it is both parts.



https://photos.app.goo.gl/dSfCbhmBaUhd1i3f8
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Old 04-27-2021, 09:10 AM   #2040
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i don't know of which scaling you re referring to.
I only do custom tune or nothing, if you want help with it i can help you
That intake definitely requires it if you want it to run smooth like with stock intake

If you want to do by yourself with romraider, there is a maf scaling guide complete with a maf rescaling tool in the Tuning section
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Old 04-27-2021, 06:21 PM   #2041
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I updated the MAP scaling with the tables Perrin claims should be used. I believe it is someone better. I think it is still on the rich side from this new data log. I am assuming I need to do the whole MAP scaling process, that the Perrin table amounts are just not good enough. Thank you for any insight.

https://datazap.me/u/derekbarker3gma...p?log=0&data=1





Quote:
Originally Posted by Silver49 View Post
I could really use some help. I feel the car is running way too rich. I changed to the stage 2+ 4.03 tune, from the 4.02. I ran a data log on the highway with 3rd gear pulls on the onramps. Could someone take a look? I feel like the front pipe cat is getting really hot, from the smell of it. The car has a an uncatted UEL header and a Perrin intake, both were on there when I bought the car. I want to be on the track next weekend, but I don't think the current fuel mappings are going to work.

https://drive.google.com/file/d/1ukM...ew?usp=sharing


https://datazap.me/u/derekbarker3gma...y?log=0&data=1
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Old 04-28-2021, 04:26 AM   #2042
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MAF
not MAP

and yes, you assume right
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Old 04-30-2021, 01:39 PM   #2043
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I tried scaling the MAF and took this log with a mix of city and highway driving with a 3rd gear pull on the highway. Can someone take a look and let me know if this is good. I believe it is significantly better than the Perrin MAF scaling tables. Any advice would be awesome. My plan is to have the car back on the track next Friday. Thanks

https://datazap.me/u/derekbarker3gma...=1-2-4-8-10-13


Quote:
Originally Posted by Silver49 View Post
I updated the MAP scaling with the tables Perrin claims should be used. I believe it is someone better. I think it is still on the rich side from this new data log. I am assuming I need to do the whole MAP scaling process, that the Perrin table amounts are just not good enough. Thank you for any insight.

https://datazap.me/u/derekbarker3gma...p?log=0&data=1
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Old 04-30-2021, 09:35 PM   #2044
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better, yes
rise a bit the value on the maf around 3.7V
you should take also a log of a third gear pull full throttle from 2000 to redline
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