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  #21  
Old 03-26-2012, 01:33 AM
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If you don't want to go smaller than a 28" tire, the 4.56 will perform best.
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  #22  
Old 03-26-2012, 01:42 AM
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28" is about as small as I care to go, and buying lower tires instead of lower gears still doesn't address my open rear diff



My bad for not spelling it out clearly enough in my opening post,
allow me to simplify things...

Has anyone ran a 4.56 geared Ram at the track on 28" tires
and have you managed to avoid hitting 4th (over drive) gear before the end of the quarter mile?

or Has anyone ran 4.10's and thought they could use a little more gear to get the rev's up an extra 500-600 rpm?
From Drag Race forums I've been on it would seem you want to be at your max RPM at the line.

My best guess is the RPM would be 5900 RPM, in 3rd (1:1) with 4.56's and 28" tires, is that close?
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  #23  
Old 03-26-2012, 05:06 AM
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I will let you know. I am running my 4.56's and 28" slicks this sat! I will give you some real numbers!
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  #24  
Old 03-26-2012, 11:07 AM
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Quote:
Originally Posted by KarateManAZ View Post
I will let you know. I am running my 4.56's and 28" slicks this sat! I will give you some real numbers!
That's what I'm Talkin' About!
Thanks KM, looking forward to your results
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Old 03-26-2012, 08:00 PM
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Quote:
Originally Posted by BlackRamHemi View Post
That's what I'm Talkin' About!
Thanks KM, looking forward to your results
Me too...!
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  #26  
Old 03-27-2012, 01:16 AM
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you know me..i am a staunch 4.56 guy...I still trapped 113 mph with 28" tall dr's in 3rd gear...but, with that said, for you I'm leanin towards 4.10's because your a regular cab and have the 3k stall...

also, with the gearing and tires i run, i hafta to shift to 2nd at 5k rpms to hold 3rd thru the traps..
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  #27  
Old 03-27-2012, 10:20 AM
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Quote:
Originally Posted by chefred112 View Post
you know me..i am a staunch 4.56 guy...I still trapped 113 mph with 28" tall dr's in 3rd gear...but, with that said, for you I'm leanin towards 4.10's because your a regular cab and have the 3k stall...

also, with the gearing and tires i run, i hafta to shift to 2nd at 5k rpms to hold 3rd thru the traps..
Thanks Fred, without spray, I'm not going to be anywhere near 113mph

Yes a Reg Cab, but being a 4x4, it weighs as much as a 2wd QC
and has a little more rolling drive train resistance due to the front diff and CV shafts always turning, powered or not
and I have a transfer case that could be turning two drive shafts when traction is poor and I use awd.

I was mostly concerned about staying in 3rd at around 99 mph. 4.10's would be the safe bet, 4.56's sounds right on the border.
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  #28  
Old 03-29-2012, 01:59 AM
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is there any way you can force your gen 4 to hold 3rd like we 3rd genners do? I manual shift at track and I go 1-2-D-2 , if I miss downshifting, I hit 4th everytime and lose my e.t.'s ...I've run both 4.56's and 4.10's at the track with 28" M&H dr's as well as 28" Hoosier slicks...it won't shift into 4th with the 4.10's but will with the 4.56's... but, with that said..the 4.56's are much more fun to drive on the street than the 4.10's... my stock tire is only 30" tall as well.
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  #29  
Old 03-29-2012, 02:07 AM
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i've seen 4th gens race at the track but I've never seen one as evil and wicked lookin an sexy at the same time...I can see why others are wary to run you...
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  #30  
Old 03-29-2012, 10:43 AM
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Thanks Fred! you're too kind

That's very helpful info

I'm going to see if I can downshift after 3rd at WOT
My only concern is the downshift will go to 2nd prime, not to 2nd.
it sounds like it may just be a matter of getting the timing right and doing it very shortly after hitting 3rd.

... I can always adjust shift points with my Diablo too.

The 4G's don't have a "D" when you switch to manual (ERS) mode
just 1-2-2p-3-4.

on my larger street tires/3.55's
I can almost get to the line in 2pr in manual mode...it's just shifting to 3rd at the line.

if I just use D, it goes 1-2-3 with 3rd gear coming well before the traps.


The benefit on the street with 4.56's appeals to me too,
my heavy ass grappler's on 20's need all the help they can get.
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