I was looking at the Steeda Underdrive pulleys and charge motion delete plugs and wonder if it worth getting it done. I'm trying to stay N/A and tweak out every bit of HP I can so keep that in mind when responding. You can see in my sig what i've done to date so any suggestions or opionions would be appreciated.

 

If your goal is to squeeze out as much RWHP, then the UDP's and delete plates are certainly worth it. Together you're looking at roughly 8-10 RWHP increase; perhaps a tad better.

 

I noticed a difference after we installed them on my friends 07....and they don't cause any negative side affects. I just chose to not get the pulleys because I have a two amp stereo in my car and didn't want to slow down the alternator at all.

I'd say they are worth the money.

 

^agreed....made my motor run smoother...can't feel the gain, but it's there.
J

 

UDP are worth a solid 5hp/6tq on 4.6L S197 after looking at 6 different mustang dynosheets. Just as long as you do not supercharger or install a stronger stereo you can keep them on the life of the car. They should help you with gas mileage, but just a little bit.

I do not know much about the delete plates only seen 1 stang with them. They should work well if you already have a CAI, headers, and a mandatory tune. YOu will gain about 10hp at the top end.

 

Thanks for the replys...looks like the UDP's are a given i'm keeping the stock stereo and no supercharger in the near future, i'm still out on the delete plates though are there any negatives associated with them?

 

My only mods are the delete plates and tune, my gains from the plates and tune are in my sig. I have not experienced any negative affects from the plates. I thinks the delete plates are worth the $$.

 

r they worth it for a V6 as well?

 

No UDP's with supercharger?? Why is that?

 

You'd be underdriving the supercharger... not a whole lot of point in doing that.