lost low end power....
 

Hey guys I just put some mods in the stang and although I'm impressed with the over all project but I am finding I have lost to much low end power I'm wondering if I can use my tuner to some how lower the power band?

What mods do did you add so we know how to assist? What gear do you have?

Need details?:tup

What he said. There are mods out there that tend to lower low end torque such as cams, charge motion delete plates, etc. I've heard putting a huge exhaust system on can cause a loss of low end torque due to lack of back pressure but I won't know 100% for sure till the end of may (im installing a huge system lol) Also depending on the mods you installed some really require the car to be re-tuned or dyno-tuned to get the most out of them.

The gear question is a very good one. If you are running stock crap gears either 3:31 or 3:55's they aren't helping. If you throw in a set of 4:10's I guarantee you will feel like you've made up that low end loss. (the gas mileage change really isn't bad I still get 25mpg highway)

theres the mods i made
 

the charge motion delete plates i figured i would loose some power but added the steeda underdrive pullies hopeing to counter balance this effect I have a large flowmater exhaust on it but saddly im still running the 3:55's hope to put the 4:10's in this summer! Heres a list of what has been done to it so far...

CAI K&N
FlowMaster Exhaust/Hurst short throw shifter/Ford Racing lowering kit/Steeda underdrive pullies/Steeda charge motion delete plates/SCT X3 tuner/up'd tire size to 255/50
there a some other mods but there all cosmetic.

Hum...maybe it is the motion delete..
I would get that K&N out of your car! and swap it for a AMSOil air filter as they don't use oil on there air filters.

Maybe your MAF is starting to get dirty, how long has that K&N been on your car for?

When you start modding,you obviously had HP,and a little torque.Mod engines aren't known for gobs of torque to begin with.My advise is once you start adding hp mods,you must do gears,actually,gears should be the top mod on the list to start with in my opinion.Seeing that you want 4:10's,you are already on the right track!:biggrin:
How about your SCT X3?Has your stang been on the dyno for proper air/fuel?

I was thinking the same thing about the tuner. Who did your tune?
Also, is that a full CAI with bigger maf or just a filter swap?
With the steeda plates (they are supposed to increase low end tq and top end hp), pullies and a CAI with a proper tune to account for it all you should have popped wood the first time out.

I am assuming the flowmaster is an axle back? If so, it should not have hurt hp/tq on your car.

I would say the tune is off with what you are seeing out of those mods.

I'd definitely check your tune to, or even get it dyno tuned which would be your best bet. The intake system on the new stangs is very touchy with CAI's, your tune has to be right on or they can lose you a fair amount of power. From what I've heard the Steeda CAI seems to have some of the best results

Change the gear!! Taller tire+3.55 :banghead:

Ok so heres the latest...had the car rechecked with the tuner I took it to one of the guys who drags 2 of his own vehicals (95 cobra and a dakota truck) he has a dyno machine that the car goes on and this neet lookin devicce that sits in the car while testing(anybody know what the hell that thing was) he changed my air/fuel mix and the shift points through the rpm range he also up'd my rpm limiter and suggest that I started using at least 91 octane so I drained tank and filled with 91 and took the wife for a cruise finished 1/2 tank and filled it with Sunoco 94 for shits not even sure if that matters but holy what a ride scared the outta myself a couple times lol I'm still lookin at changing the gears but not sur if i wanna go as high as 4:10 is there some thing between 3:55 and 4:10's for the mustang????? later!

Glad you got it straightened out.

You can get 3.73's for your car if you feel 4.10's will be too much.

That's great he was able to adjust the tune for you. With the results you got it obviously was the problem. It's also good he adjusted the air/fuel. That way you know it will be running safe. (depending what he adjusted it to. I'd suggest not any leaner than 13.0 with 12.5 usually being the best for n/a)

If he tuned it for 91 octane you don't need to spend the extra cash on 94. Just make sure you DO NOT go lower than 91.

If you have 3:55's going to 3:73's would not be worth the money for the slight difference. 3:93's would be good BUT people tend to have problems with gear whine. Trust us you'll love 4:10's. I still get 25mpg highway. The fun factor is more than worth any downside.

ok for the 91 octane what happens if you run lower one of the guys at work said i just lose the hp gains from the tuner ..not true???...something more damaging??? as for the 3:93's could you explain the "gear whine" comment im not sure what this means. with the 4:10's Ive been told at cruzin speed I'll be hovering around 3500rpm@100kmph(60mph) is this what you are at getting the 25mpg?

You won't necessarily damage anything but there is definently a higher risk of it. As far as I know it all has to do with the a/f, timing, and combustion of the fuel. A lower octane fuel doesn't combust the same which can cause problems.

As far as the gears the "whine" is an audible sound the gears make, that you can hear in the car. It can sometimes be fairly loud. Here's a clip where you can here it. s197 gear whine on Yahoo! Video

No not even close to that high rpm. I think it's somewhere around 2700 at 60mph in 5th. At 120kmph is where I'm getting 25mpg around 3000 rpm.

Glad to see it's all been figured out!That's awesome!
Since we both share the same trans :wink:,the 3650.....you will be around 2500/2600 rpm in 5th with 4.10's.I wouldn't even waste my money on 3.73's,not really a big jump from your 3.55's,you wouldn't even notice the diffrence really.4.10's are fine.It's the only way to go with the modular powered cars.It would be equal to a 5.0L with 3.73's.
A lot of modular guys fear the gear,people with modular powered stangs need to unlearn what they had learned with the old pushrod cars.Erase the info from there minds.Push rod engines make loads of torque down low,so going to big of a gear in a pushrod vehicle will rev out way quick,the modular engine is the opposite,they are a pig down low,but lots of room up top.So to gain the torque down low,the modular needs gear to keep up with the pushrod boys!

Ok so can anybody give me some feedback on what 4:10's there using I dont care if there just your fav's or if your using them now I'll research them all just need some start point ..hey guys thanks for all the info all was a really big help!

Go with ford racing. They are reliable and if installed properly won't have any whine.

Go with Ford Racing's 4.10's!:wink:

actually the stock 235/55/17 are 27.17" in diam. the 255/50/17 are 27.07" so there wider but smaller over all...I think what I'm saying makes since I knew if i went larger ya it would have effect but i stayed with in .52% in size change and smaller to boot.