AFX PCM will bring you over 120

 

Well he elignement will not case a vibrations or shimmy. As for the question on a very light weight used by a manufacturer. A lot of them will use all the way down to 5 gram weights. Most shops will only use down to a 10 Gram. Heck not a big issue truly. But when I balbance a tire I will often double check for actual weight on a balancer not just the rounded wieghts. Standard Coats balancers will oftern round weights up to .28 of an ounce to .00 as you are very unlikely to notice even at speeds over 85MPH. But out of my **** retentive nature will often check for less than .13 on inner and outer rim to ensure less than 1/2 of our smallest common weight, 1/4 oz or 10 grams.

Now as for other causes that I have found for vibrations at speed (No particular order),

1. Tire balance
2. Bent rims (check both ways as it may not be obvious at first)
3. Corrosion build up on back of rim
4. Bad tie rods
5. Severely unevenl worn tires (Alignment or worn shocks)
6. Tire defects

 

lower control arm bushings, quick fix and will stop the shake

 

they have a speed limiter? honestly I didn't know that...and that SUCKS! how much higher will the afx pcm bring it?

 

120 in a neon never i got a 98 rt every part available except turbo and it stops at 115 its all the car has you need a 6 speed to go over 120 especially in the rt with the different trans aftermarket pcm aint gonna help only gives you 400 rpm

 

dude, in my 98 4-door, all I have is a larger-diameter intake, breather filters, and a muffler, and I've been 117+.

your car sucks, man (no offense)

and those are LITERALLY all I have done to it, performance-wise.

 

Yeah what generation R/T you have??? My 1g speedometer stops at 120 but I know it limits at 130

 

lol I pulled out the pin that stops the speedometer at 120 so it can keep rolling around hahaha

 

no offense but YOU GOT A AUTOMATIC rt is only 5 speed with a close ratio trans you go 117 but ill be there waiting for a while for you!!

 

[&:]can you umm...speak english? there was no punctuation in that at all, and I didn't really understand...[&:]