Zepher

iTrader: (1)

Anyone else running a WCT5 with 4.10 gears?
Is your mileage on the highway terrible?
City driving is fine since I can keep the RPMs below 2500 easily, but on the highway I am anywhere from 2500-3500 while cruising. Not sure how fast I am really going since the car has a 3.45 sender in it but I am usually hoverering between 80-100 on the speedo.

TPI Monte SS

How bad is it? I get near 21 mpg with my T5 and 3.73s, usually crusing between 65-75.

Dialed_In

iTrader: (3)

Man, 21mpg highway, I get about 10-12 avg. with LB9/T5 with only 3.42's

TPI Monte SS

Ouch! Even when beating the snot out of my car I average about 12-14 mpg. Time for new O2 sensor and tuneup maybe?

Dialed_In

iTrader: (3)

No, its running great. Maybe I ought to re-calculate my mileage.

hot92z

damn you guys wont believe me.....

15 city
25+ highway on 3.27s<======I tend to stay at 60-65 since iam never in a hurry

Zepher

iTrader: (1)

I think it's in the single digits.
I did get pretty decent mileage with the 3.73's, about the same as you on the highway if I just cruise.

rjmcgee

I don't actually figure mine, but I can get around 150 miles out of a tank. With a .63 overdrive it seems about right out on the highway. When I ditched the Edelbrock for the Demon carb the milelage suffered pretty bad.

A couple years ago when I was going through several differant rear ends I had a set of 2.73's which was a horrible pain in the *** with the 5 spd. Took it to the coast once and got over 20 mpg out of it.

jimmy_mac

So how are you calculating the mileage then? Doesn't the odometer run off the spedo cable also? I could be wrong about that, I just always assumed the odometer turned in relation to the speedometer gear in the dash. If that is true then it's off also.

Zepher

iTrader: (1)

Well, I know how far approx I am driving to and from where I go and I know how much money I am putting in the tank as well as the trip odo saying that I got 60 miles for $15, which I know I didn't travel 60 miles since the speedo is way off.

blackgold84

iTrader: (1)

hey guys,
do those of you using 4.10 like them, perfomance wise when combined with the t-5?
i have a non-wc t-5 and i am gonna do gears and a posi upgrade from my 3.23 open diff, and cant decide if 3.73s or 4.10s should go in.
i really wont do much highway driving, but i do like to race on the highway, does 4.10 mean no more 120-130mph blasts?
@ 70mph what rpm do you guy sit at?

-doug

vernw

iTrader: (2)

Doug - with my Ford 9" 4.11's and WC T-5 I'm running about 2500-2600 RPM at 70 MPH. ANd that is the correct speed, it's been verified while setting up my Dakota Digital VSS conversion box.

4.11 gives great "hole shots", but if you're after top end 120-130 blasts then you're probably better off with 3.23 or at most 3.42's.....

okfoz

I got an honest 25 Mpg in my Formula going down To Dayton OH, from Flint, (about 260 miles) one tank of gas, and I have Richmond 3.73's On the way back I got 21 Mpg, but I think that had to do with when I filled my tank just befroe coming home my filler neck was low and I did not get a true full tank.

But I have an Automatic a .040 over 305, and I changed out the speedo gears.

If you have not done so, with your 305 TPI setup, I would invest in some time programming your computer... Mine was running waay rich, and it really helped just to level out my BLM's

John

Zepher

iTrader: (1)

I'll start playing with the program soon, just haven't had any motivation to tune.

With 3.73's I was still able to peg the speedo, but I think the speedo was showing 10mph higher, so I was probably doing close to 130mph.

4.10's pull very hard with the T5, which I like a lot, I just end up shifting so much.

At the auto-x yesterday, the 4.10's worked great, kept it in 2nd and even slowing down and then accelerating in 2nd, the 4.10s helped accelerate me quickly.

dr1

your formy looks like it tripped is its going to fall over in your sig
is your suspension still good? i never have the pleasure of seeing mine from the outside when im doing that :P

i always have trouble beliving 25mpg on 3.73's, could someone get me 35mpg on my 2.73's?? id appreciate it

Zepher

iTrader: (1)

suspension is new, and nice and stiff.
I am in the process of going through the slolom very hard.

dr1

ahh, yeah come to think of it I guess that doesnt look bad at all, heh
that car looks good in action

Zepher

iTrader: (1)

here is a video from July at the same place,
http://www.transamws6.com/video/manny-acu4.wmv
Looks better in motion, imo.

okfoz

Zepher,
Did you "upgrade" your suspension with aftermarket, or did you stay with the stock sway bars. I have seen the aftermarket stuff, and it seems smaller in diameter than the OEM WS6 stuff.

I was just wondering.... I know my car with the stock springs and sway bars with the KYB shocks, Boxed in control arms and pan hard bar it rides like a Vette, but it handles great. At 120 it is glued to the ground.

Just wondering what all you did


oh, BTW, your name is now a car nameplate. Lincoln is coming out with a new Zepher... Actually its a revitalization of an old name.

John

Zepher

iTrader: (1)

John,
I've got the stock sway bars on the car.
The upgrades consist of Eibach Sportlines (which I've read handle just like the stock WS6 springs but give you a lower ride height), KYB GR-2 front struts and KYB Gas-a-just rear shocks, BMR panhard, and Lakewood LCA's with poly on the body and rubber on the rear since I've read that poly/poly can bind when cornering hard.
My car also handles great at speed, I've done a few 120-140 8 mile runs on the HOV lanes they have here, it has mild corners and elevation changes and the car sticks to the road like it's on rails. I won't do that on regular rubber though, I have a lot of confidence in the Nitto 555RII tires that I am running.

And the new nameplate should be spelled Zephyr, I have my username spelled incorrectly since when I got my first email/internet account way back when, zephyr was taken so I used zepher and have been using it spelled that way ever since.

Matthew91-Z28

This raises an interesting question......I have (HAD) a 3.42 rear that was put in the car before I got it. The previous owner had no idea. Its supposed to be a 2.73.

I show 190K on the odometer.

I have no idea if the speedo was changed or not (prob not) when this was all changed.

Wondering how much mileage I really have.....more or less than what I show?

dr1

your mph will be high if the speedo gears are for a 2.73
so, of course your mileage will be also

do you find people regularly honking at you and flashing there lights and yelling?? if so your speedo gears may be off, they probably are not admiring your car

Matthew91-Z28

hah hah

no...usually its the other way around...I feel like I'm usually the one cruising at 65 mph and everyone else is passing me. With 3.42's I was trying to keep the rpms low enough for gas mileage on the highway.

1meanGTA

i just fragged my richmond 4.10s. i have an auto though. havent decided between 3.42's and 3.73's yet. i mostly just drive it around town, no drag racing, but i have a lot of fun with it on the street.

i liked the acceleration of the 4.10s, and i could deal with the high revs on the highway and lower top speed, but i couldnt stand first gear. it was basically just a tire spinning gear. if i was stopped in 1st, and got on it, basically i was hitting 2nd at about 10-15 mph. how much more "usable" would first be with 3.73's?

the difference in highway rpms will be about 300 less rpm for each step lower right?

vernw

iTrader: (2)

Before I went to my 4.10 9", I had a factory 3.42 in my 91 'Bird with a WC T-5. At 70mph I was pulling like 2100-2200 RPM IIRC. That would only be a 400-500 RPM drop between 4.11 and 3.42

okfoz

I really don't know what everyone is complaing about... I only run something like 2500 RPM at 75 Mph... My old 67 Buick Riv runs 3000 RPM at the same speed, and its a Big Block...

John

1meanGTA

t56's cruise at 70 around 1300 rpm

my neighbor has an old avanti ii with a hopped up carbed 350 and a t56, that things nice, even if it is a bit goofy looking. its so smooth on the highway. i'd blow his doors off though

Zepher

iTrader: (1)

update:
I am actually getting better fuel economy than I thought.
Did 2 long trips in the past week (160miles round trip for each one, so not exactly that long) and I estimate I was getting around 20+mpg cruising at 3000-3200rpm with a few spirited runs to 4500rpm for a few miles.

savagevulcan

wow 20+mpg, id be jumping if i was getting that!
I get 15 mpg on the very best day and i cruise at 55-60 mph on the highway over here. Also having my top gear (4th gear) at a mere (1:1) and having 3.50:1 gears in my ford 9 inch makes my RPMs fly to 2500-3000 at only 60 mph

6SpeedTA95

My gosh some of you guys are getting just plain crappy mileage. A stock 305 TPI car with a 5 speed should get 25 to 26 mpg on hwy if its in good tune. With 4.10s I'd suspect somewhere around 18 or 19 mpg on the hwy. Some of you guys are averaging 10, 12 and 14 mpg? On all city driving the WORST mileage I've gotten in my TA was 15 mpg and thats with a 350 LT1 and NOT using 6th gear at all.

If you're getting really bad mileage do a tune, check the exhaust for any restrictions. Something is wrong if you're getting average mileage of 10 or 12 mpg...or maybe you just rape the crap out of your car all the time?

hot92z

Maybe its has something to do with the fact that most of these guys go down the road at 80mph...i get just as good fuel mileage out of my 5 speed as i do as my 4 banger beretta on the highway

6SpeedTA95

My Trans Am gets better mileage than my Wife's 1996 Rav4, better mileage than her sisters 2003 rav4, better mileage than my old V6 626, better mileage than my friends honda accord V6. In the city I can get 20+ if I baby it, I average about 17 in town though so thats not too horrid. Just seems like you really have to drive them hard to get bad mileage or have 4.11's and drive 80, which would also cause the mileage to drop like a brick...

Zepher

iTrader: (1)

I drive my car hard pretty much all the time and cruise at 70-90 on the highway.