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-   -   4.56s (http://www.ramforumz.com/showthread.php?t=106944)

KarateManAZ 03-09-2012 02:18 AM

4.56s
 
Getting 4.56s installed Saturday morning!

KarateManAZ 03-09-2012 02:19 AM

Here is a quick pic of my engine bay...

http://i12.photobucket.com/albums/a2...1/99aa3151.jpg

SS4Luck 03-09-2012 08:16 AM

Thatll be awesome man your truck is gonna fly if it can hook up! lol

Big Green V10 03-09-2012 08:23 AM

Nice I remeber when I changed to the 4.88 was fun.

snrusnak 03-09-2012 09:06 AM

Awesome, what gearing did you run the 12.5 on? 3.55? You're truck is wicked!

Is that the v6 electric fan? Did you notice cooling improvements switching to it? I ask because I run no mech fan and the stock efan with stock shroud and have not had any issues with 180 tstat and fan set to kick on at around 200 deg. While moving the coolant never gets above like 190-194, and when sitting it climbs, then the fan kicks on and it comes back down to around 194. Then I get moving again and the fan kicks off as the coolant cools down.

JW if it's only a space savings mod or if it moves more air...

KarateManAZ 03-09-2012 06:35 PM

Quote:

Originally Posted by snrusnak (Post 745357)
Awesome, what gearing did you run the 12.5 on? 3.55? You're truck is wicked!

Is that the v6 electric fan? Did you notice cooling improvements switching to it? I ask because I run no mech fan and the stock efan with stock shroud and have not had any issues with 180 tstat and fan set to kick on at around 200 deg. While moving the coolant never gets above like 190-194, and when sitting it climbs, then the fan kicks on and it comes back down to around 194. Then I get moving again and the fan kicks off as the coolant cools down.

JW if it's only a space savings mod or if it moves more air...

I went from the clutch fan to the Efan and have seen no change in temps. I do feel it rev up faster without the heavy clutch fan on the motor.

KarateManAZ 03-09-2012 06:38 PM

I ran the 12.5 on 3.92s. I expect a nice change going to the 4.56s. Maybe not a HUGE change if I was at 3.21 or 3.55.

KarateManAZ 03-09-2012 06:38 PM

Any advice from people who went bigger with gears?

Break in?

Driving style?

Level of awesomeness!?

InDeepWaterBlue 03-18-2012 03:15 AM

Quote:

Originally Posted by KarateManAZ (Post 745187)
Getting 4.56s installed Saturday morning!

Where did you get the gears from?

TheSatinPumpkin 03-18-2012 10:40 PM

Follow the instructions of the gear manufacturer. Just finished up my 500 break in and it was hard considering the route i use and i rarely use the truck during weekdays.

I don't know much about FI power band and peak but i thought the 3.xx ratios would be good on FI to make use of the rpm through the whole power band. It will go much quicker with 4.56's.

That said they are darn sweet on a NA setup.


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