Got the dyno done today. I have borla stingers and K&N FIPK. I also have done a search and found some info but would like a little more please.The cobra made 409hp and 387tq sae. I am worried about the a/f ratio. When the rpm's are between 3700 and 4700 my A/F is 13.1/13.0. From 4700 to 5600 it makes a steady drop from 13.0 to 11.9 then keeps droping off the chart rich. I just want to make sure the car is not too lean in the mid range. Any info would be greatly appreciated. :shrug:
Help with mods and A/F ratio
- Thread starter NEVR L8
- Start date
Welcome to SVT Performance and nice numbers for the mods you have.
Your A/F sounds about right, it will drop dramatically when you nail it right around that rpm. You just want to stay at 12.0 or under through the whole run.
Can you post up your dyno sheet, it will give everyone a good idea of what's doing.
Hec
Here is mine for reference, see how flat the A/F stays? That's what you want to shoot for
Your A/F sounds about right, it will drop dramatically when you nail it right around that rpm. You just want to stay at 12.0 or under through the whole run.
Can you post up your dyno sheet, it will give everyone a good idea of what's doing.
Hec
Here is mine for reference, see how flat the A/F stays? That's what you want to shoot for
NEVR L8 said:
You have to host the pics somewhere else and post a link to it.
In regards to you a/f, you want to be at 12 or slightly below. You can fix your a/f with a cutom tune.
I cant get the picture any bigger, sorry I'm new to this. My main concern is that I dont want to blow it up. I plan on getting it tuned, but it may be a while. Its hard to tell by the picture but it doesn't get below 12.0 until 4750rpm. Is this ok with my 409hp and 387tq? I know you guys with bigger numbers and more boost like to run a/f at around 11.5 to 12.0, but isthis ok with my set up?(K&N FIPK and Borla Stingers).
PoisonSnake
Banned
What does it mean if the A/F is over 12? (yes means you need a custom tune) but what happens if you don't like being over 12 what happens
:burn:
Your #'s look ok to me. 
I am interested in this as well and for this reason I am hesitant to install my FIPK. I have also heard people re-drilling the FIPK so that the MAF is in the stock position to avoid leaning the car out. I do not want to custom tune in order to save my warranty.
what does maf stand for? sorry if it is a stupid question
yes, it does. thanks. so, what is the verdict on installing a fipk? is it safe?
PoisonSnake
Banned
Yes, it's safe but for some reason a lot of the 2004 Cobras have a "stall" after getting it installed. I'm not sure about the 2003 Cobras, though... I haven't had a problem thus far in my '03.
Ive had the FIPK on for 4 days now and no problems yet. I have drove the car in stop and go traffic and on the highway without incident. The only problem I have is I keep hearing this jet taking off every time I mash the gas! :burnout:
I installed the FIPK and my car stalled twice. I have a 2003 10th anniv. and it never stalled before the installation. I even got the ECU flashed with the latest update at the dealer after the install which was supposed to stop the stalling but it didnt work. I just took off my FIPK today and probably am going with an intake that doesnt mess with the position of the MAF. I too want to keep my warranty and dont want to worry about my A/F mixture. While we are on the subject....anyone want to buy a FIPK with about 100 miles on it?
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