V6 S197 General DiscussionThis section is for technical discussions pertaining specifically to the V6 variation of the 2005 and newer Ford Mustang.
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I'm the proud owner of a 2009 Mustang V6. I've been upgrading it every couple of months. I figure giving it time to settle and the KAM to adjust itself.
I started out with a BBK CAI which really helped the engine to breath and I noticed the increase of the performance. At the time, I had no real way of tracking such... except my personal Butt Dyno.
Two weeks ago I installed a BBK 70mm Throttle Body and intake spacer. I had several issues with installing it, the prior owner did not have the original bolts and thus gave me an "MML" 1/2 inch spacer with bolts. No gasket. Once I installed them and took a few trips around the block I heard the whistle. At the time I did not know it was the "The infamous BBK whistle". Thinking it was a leak with lack of a gasket. I used RTV silicone sealant to make a new gasket between the spacer and the TB. Here's where I'm hitting issues but this time, I have a means to record some data.
I'm noticing that my Fuel Long Trims when idling are 15 and 14. While the Short Terms and instantaneous avg out to zero (rough sin wave).
When I accelerate hard, the first change is the engine load.. when it first peaks out the the Long Terms jump up to low twenties while the short terms and instantaneous work their way up.
What I'm noticing is the lag in power... There is a hesitation when I step on the pedal before the car really starts to pick up speed.
I know that to fully use the CAI and the TB (w/spacer) I will need a tune. What I don't know is if there is anything that I can do between now and when I get a tune to smooth this out.
I'm noticing the more I drive that with the new TB, to get to the power, I've got to down shift and get the RPMs up. When I do this the fuel trims spike up and stay up well past when I throttle down. If I don't "rev up" then the power is not firm and solid. In this "powerless" band, I hear the whistle.
Below is an image of the data.
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That aftermarket TB has a good chance of damaging the TB motor as other members have experienced.
You are probably just running really lean with the CAI and chances are the TB spacer is giving you the fluctuating RPMs by creating small high pressure pockets of air. That spacer is way too small to net you any gains at all, the surface area just isn't there to allow for a great enough change in air flow. Wasted money.
You should have gotten the tune/cai, and saved the rest up for an 8.8 rear end with a steeper gear ratio.
I've noticed that opinion around the forums about spacers for the S197. I would have preferred to install the TB without the spacer but the prior owner did not have the original screws... only the ones with the spacer. Considering I got the spacer for free with the TB... meh on the spacer.
I've read numerous post, due to issues members have suggested removing the BBK throttle body and spacer, then re-installing the stock TB. Get your money back and put it towards the hand held tuner with custom tunes from a reputable company such as AM or Brenspeed. =-)
Steering the thread back to the delay or lag in power.
I'd like to learn more about the trims and maybe a more theoretical solution. Since I'm noticing the engine load increasing when I attempt to accelerate while the mixture runs lean until the trims can catch up. I'm curious why a tune would not be able to push the trims back closer to when the load increases.
Maybe increasing the amount of fuel being injected. Instead of letting the trims increase the injection duration what about increasing the amount of the injection (per unit time).
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