holmes14

it has a H- midpipe with the cats taken out and the guy said he thew a blocker in on one of the 02 sensors but the service light still comes on, What kinda MPG on the highway can you get with 4.10's? last time i checked i think i was gettlin like 25 or so on the hwy, i realize a tune would be necessary to get the spedo right but would it make a diff with just exhaust and kn filter? How much of a Diff do underdrive pulleys make? thanks allot for the help so far guys (by far the best forum for stangs) Is changin gears sumin i could do myself, and i noticed that sometimes if i get on it around a corner only one tire will spin (sometimes both) if i takke off straight tho both spin, is this a concern? sorry for all the questions- Holmes

holmes14

Also are pulleys a good idea for me?.......Istill have a guy that says hes knows allot about stangs and says that a 96 cobra will pretty much smoke a 99 GT everywhere i looked at numbers they seem really close but i havent got to race one so i cant speak for it, anyone know about that? and how would my 99 GT do against a 88 GT he says that stock for stock with smoke mine too

99gtstang

i just had 373's installed we don't have the 3650 tranny, i made a post a few weeks ago about my rpms at 75MPH i said 2600 but that was wrong............

75 mph=2450 RPMS
80 is close to 2600 an its annoying on the hwy....

i would do alot of research before you decide to do 410s

holmes14

yeah i think 410s might be a bit much, and it sounds like i should have a pro installl them

geetee03

4.10's are only too much if you fear the gear.

the sn cobras are pretty even with the edge gt's. the gt has the advantage off the line, and the cobra has the advantage up top. i beat a sn cobra that had full exhuast and some intake mods pretty good when i was on the nitrous tune with out spraying (-15hp)

holmes14

What kinda gas mileage do you get cruisin at 75 with 410s vs 373's then? and around town....

DTK

If you are going to the track with the car frequently and also like a bit of street racing then go 4.10's.
If your car is strictly a DD and a weekend cruiser then go 3.73.

MPG should not enter into the equation because it is a V8 sports car and it does not get great fuel mileage to begin with. Don't get me wrong, I don't like the price of gas either but when I go out for a ride in the mustang fuel economy is the last thing on my mind.
You will see a little higher rev at highway speeds in the 4.10 but many say the mpg is only 1-3 mpg more.

holmes14

sorry to say but my mustang gets better gas mileage then my 02 trailblazer did. 25+ mpg in a V8 sports car is very good in my opinion, and the car is my daily driver and tear up the streets, sometimes do some drag racing. So MPG is deffinetly a factor for me because i want this car to still be able to go on 10+ hour trips and get 23-25 mph

holmes14

if i turn right my car doesnt pull posi.... if i go left it whill whip around or straight taking off or brake tourqe it will pull posi but even when wet tuning to the right it wouldnt pull posi tryin to whip a doughnut, is this normal?

stangfan99gt

trust me, a stock 88 gt should not beat a 99gt. i can see a 88 5 speed, well driven versus a 99 gt auto being fairly close at the start, with the 99 pulling harder up top (260 hp vs. 225 hp)