SHAKNBAK

4.56 gears are awesome! Especially with a high stall converter!!! DIZAM!!!!

gonzo 6.2

iTrader: (8)

If awesome means snappy and easily roast'em OK. Quickest hemi SWB have what gears? H777 and density others?

BigPurp

Depends on what rpm your motor turns and tire height as well. If your going to spin 7k and the truck pulls strong up to that point you would be at an advantage giving the truck the strongest mechanical advantage possible.

You really think a truck with 3.55's is going to run the same 1/4 time as one with 4.56?? Your completely out of your mind. Only situation where that would be true is if the truck was running out of gear in the 1/4 which is HIGHLY unlikely.

28" tire (pretty average)
4.56 gears
1:1 3rd gear tranny ratio.
110mph is only turning 6000rpm

Last I checked most trucks that will run 110 have nooooo problem spinning 6k.

Yes it's all dependant on your setup and some motors like to lug lower gears, but with the tire height most rams are running 4.56 are great.

gonzo 6.2

iTrader: (8)

in a 1/4 mile 3.90s will spin less out of the hole and pull harder on top in a RCSB 2x4.It will stay in the torque curve longer.

ColtSteele

I agree with ShaknBak my 4.56's are in my top 5 mods. I gained 2/10 in the 1/8 and right at 4/10 in the 1/4. It pulls great all the way through and that's with the 22's.

gonzo 6.2

iTrader: (8)

Do you think H777 would have been .4 quicker over his best N/A times?I bet he would say no.

ColtSteele

I didnt say my times were na and I'm not comparing to anyones times but my own.

BigPurp

Hate to tell ya gonz but your wrong in this instance. 4.56 gears are great for 1/4 times as have been proven by numerous hemi rams, 5.9 dakotas, SRT-10's etc. Heck the QC SRT-10 comes with them stock... go figure. If your a lead foot and don't know how to launch then yes you'll smoke them easier, but as for staying in the torque curve, pffft. Last I checked most trucks run much better if you let them pull through the lights at more than 4200rpm.

Not all will drop .4 in the 1/4 but thats a very common number for mildly modified setups. Yes some that make monster power won't see a gain b/c they have the power to pull huge gears to redline anyway.

Whos this 777 guy you seem to be what are his mods? what does his truck run?

It's a hemi, not a cummins, they don't like to be lugged with tall gears at all.

Rumble Bee Ram

777 runs 3:92s in the old truck and I assume thats what he is running now. Seems all the dodge sites are having controversy over the gear swap, so I'll add my experience with them. A few guys I know have done them, one being Hemifever and another being Rampant, the only two that I personally know myself, but others on the different sites have swapped as well. Hemifever got very little gains with his swap, like around a tenth, but he feels as if gave him some more power to spin the heavy 22s he is running a little better than the 3:92s. Rampant, now I was directly involved with his swap, but running the truck after the swap to 4:56s from the 3:92s yeilded about 2 one hundredths of a second gain, which is less than a tenth, test were done the same week, same track, so the conditions were about equal. So I say, its a waste of money if you are expecting a big gain in the 1/4 mile. Now, off the line and thru the 1/8 there was increases that were noticable, but who in their right mind wants to stop at the 1/8 when you have the 1/4. But for street racers or ricers, how ever ya wanna look at it, it might be worth it from light to light. I would spend my money on a programmer or a NOS kit before I went to do gear changes myself, but thats my opinion, and you know the old saying, everybody has one, some have two.

Rumble Bee Ram

Gonzo, that is my exact findings as well. 4:56s had a better hole shot and gained in the 1/8 but died flat after the 1/8, you guys need to run a before and after at the same track and about the same conditions, or as close as possible.