elarm1
Maryland Native
120?! My taurus speedo only goes to 85! What kinda car do you have?
Dissappointing Top Speed on my 98
- Thread starter chrism3784
- Start date
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needaQuaife
AKA: 5speedSHO
my 92 MTX with a y- pipe & magna flow cats, and I have hit 135
jmpSHO
SHO Member
The most likely cause of the car not being able to push itself past 120 mph is a bad cat or a partially clogged cat as someone already mentioned.
chrism3784
SHO Member
Probably. But I only get one code, its about the secondary air pump. Think its something to do with exhaust? It seems to drive pretty normal and fine at lower speeds. It takes off good. So cars suppose to be even faster then that?
My fuel milage seems ok, nothing out of the ordinary. So a bone stock gen3 sho can top 140? I thought these were much slower then the gen1 and 2 mtx which tops at 143. My gen3 is certainly slower then my gen1.
My fuel milage seems ok, nothing out of the ordinary. So a bone stock gen3 sho can top 140? I thought these were much slower then the gen1 and 2 mtx which tops at 143. My gen3 is certainly slower then my gen1.
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three50one
SHO Member
If no codes then your cats in your Y pipe are probably fine. Unbolt the third cat after the flex and see how she does my man.
These cars are heavier, but have just a bit more power. They're slower to get there in stock form.
These cars are heavier, but have just a bit more power. They're slower to get there in stock form.
jedhead
New Member
I tried to get Ford to fix the speedo under warranty, but the Service Manager gave me look are you kidding? Mine 1998 went to zero at 110.
Bob
Bob
LJRuddy
Pop lock n drop
Do the following on a closed course with a professional race car driver:
unbolt your exhaust at the y-pipe and secure the cat back section so that it does not drag on the ground. Go out and do a top end run. Come back with results. If your 3rd cat is clogged, you will notice it when doing this test. :wave:
chrism3784
SHO Member
Seeing I am a professional driver, I'll give that a try sometime. I have a cat that I'll try to replace with when I get the time. Right now I got to much going on.
idc1233333
New Member
Not to hijack the thread, my 98 sho seems slower at the top end than other v8 shos. I have a 3rd cat delete and flowmasters mufflers. Ive gone 130 in it once but on the flats it doesn't like to go past 120-130 and if it does it takes a LONG TIME. My spedo doesnt work past 110 so I use my gps
chrism3784
SHO Member
Cut out the cats, all 3 of them, and had a friend recut and weld the catless y-pipe together. I took for a run and hit 124 and still climbing, ran out of road. Someday I'll be on a long straightaway where I can see where it tops not. Also cars noticably louder.
LJRuddy
Pop lock n drop
Glad to see your car is back to normal.
stephen newberg
SHO Member
Cutting out all the cats will not make the car faster, though you are sure right that it will make it louder. And worse for anyone trying to breath. Oh, and against the law in lots of places...
pax, smn
pax, smn
chrism3784
SHO Member
Magically fixed! I hit 140 coming up here, easily! In virginia now, somehow the long drive must have done something, cause it reaches 140 easily! I had a friend do a rear O2 sensor mod for it being catless. My gas milage is really good, even for my high speed driving. Radar detector saved my ass 4 or 5 times. Generally stayed between 75 and 90.
When I get home, going to run some seafoam through it.
When I get home, going to run some seafoam through it.
Just came across this post and was wondering if you ever made that run? If not, alligator alley is the spot to do it. I see you're already in West Palm, so just take a trip to the Ten Thousand islands sometime. I too have a 98 and had the same problem years ago, but haven't come anywhere NEAR 110 in at least 5 years. I spoke with a guy named Tommy here in Brevard County a few weeks ago who drives a nice 99 (IIRC) and he said he was getting to top speed easily.
Fordtaurussho
New Member
did a 135 mph in my buddys gen 2, umm never tested my 97 out though lol dont have any good/deserted/cop free roads here in manitoba lol, when my third cat was plugged my car would like top out at 75 mph lol
