Gear Discussion - Timeslip Comparo 2 trucks

[ViperTruck2933]

Okay, Lets talk about 4.10s vs 4.56 gears. My neighbor and I went to the track last night. I only got to do 1 run but we lined up his 05 and my 04. Here's how it broke down.

His 05....X-Metal Stage II PCM, Bassani Headers, X-Metal Catless mids, JMB Custom CAI, Magnaflow, Gen IV shifter...stock 4.56 gears.

My 04....DC Stage II PCM, Belanger Headers, Highflow cats, JMB Custom CAI, Magnaflow, OEM shifter....Stock 4.10 gears.

First run in a while, I really babied it out of the hole, launched at only 1500-1600 rpms.

05 RC
R/T .117
60' 2.181
330 5.763
1/8 8.654
MPH 85.20
1000 11.161
1/4 13.276
MPH 106.71

04 RC
R/T .046
60' 2.213
330 5.819
1/8 8.773
MPH 83.63
1000 11.276
1/4 13.381
MPH 107.11

Discussion: Are the 4.56s really an advantage? Granted his low end is better than mine BUT I ran him down with the mph at the other end of the track. My launch was intentionally very soft. I usually cut a 2.1 or better 60' and usually run 13.0x@108mph. He did several runs last night and this was his best run. I'm trying to figure out if the gear change is really worth it.:dontknow:


I left after the first run because it rained and my son was with me (couldn't stay late).

 

[QuickSilver]

Don't know about the 1/4-mile... but they sure make a differance in everyday traffic. And you keep racing her with the 4.10's and your going to need a new clutch...trust-me.....

Quick

 

[ViperTruck2933]

My OEM clutch has over 20 passes on it, still grabbing hard.

 

[silversrt]

All I know is that when I put the 4:56 axle from an "06 in mine that it feels better around town and is a tad more fun to drive.

The variations could be other issues.If you had exactly the same mods (same brands for flash and headers) and could compare dynos and reverse drivers in each truck , then you might have a fair comparison.Just my .02

 

[RedSrt007]

I would say gears and 60-foot was what helped the 05 win..now I 'believe' if the 04 would have the same 60-ft, I think he would have won...

 

[ViperTruck2933]

I would say gears and 60-foot was what helped the 05 win..now I 'believe' if the 04 would have the same 60-ft, I think he would have won...

That's what I thought too. I left alot on the table on that launch. It was the first trip to the track since the spring so I took it real easy. With a harder launch I could have trapped at least 108 and 13.0x ET.:dontknow:

That's why I am curious if the gears are worth it. We have almost the same mods. Plus he has no CATS.

 

[RedSrt007]

That's what I thought too. I left alot on the table on that launch. It was the first trip to the track since the spring so I took it real easy. With a harder launch I could have trapped at least 108 and 13.0x ET.:dontknow:

That's why I am curious if the gears are worth it. We have almost the same mods. Plus he has no CATS.

Yeah, no cats are worth about 15 up to 25 HP (on some trucks). So if you would have hooked, you could have got him at at least been REALLY REALLY close (I think you would win, personally )

 

[FlyingLow]

That's what I thought too. I left alot on the table on that launch. It was the first trip to the track since the spring so I took it real easy. With a harder launch I could have trapped at least 108 and 13.0x ET.:dontknow:

That's why I am curious if the gears are worth it. We have almost the same mods. Plus he has no CATS.

Driver mod is alot. You should swap trucks for a few runs and see if there is any difference.

 

[Azmotorhead]

4.56's will pull harder out of the hole but you'll reach peak RPM sooner.
4.10's will give your truck "longer legs" your top speed will be higher -on a longer run-
You were about a tenth behind him the whole race but see how your MPH is greater than his.
If given another 1/4 to 1/2 mile you would be even with him & passing(maybe)

DC switched to 4.56's in 05 for a reason:idea: same with 05's getting better front calipers:idea:

If youre breaking traction with the 4.10's (suffering 60ft's) 4.56 will make it worse.

 

[ViperTruck2933]

DC switched to 4.56's in 05 for a reason:idea: same with 05's getting better front calipers:idea:

Yeah but what reason? I attribute the 60' to my launch. I usually have a better 60 than the one he posted.:dontknow:

 

[mauiSRT/10]

My stock clutch went toasty on my 24th run!! Are you gonna call Roe and get their SC? If so their's your answer, dont change em ! LOL

With everyday driving going to 4.88's was the best mod ever. Its way more peddle responsive. I absolutly love it.

Like Smoke said, the driver really makes the difference in the RC quarter mile race. Hard to compare his to yours. You should drive his truck.


patrick

 

[ViperTruck2933]

Yeah I can see the better 60' and 1/8 but the 4.10s clearly outperform the 4.56 in the second 1/8. We were side by side and I could see/feel my truck pulling harder in the 2nd 1/8 mile.

Just didn't expect to see the 4.10s out performing anywhere in the 1/4 based on what I had read before. :dontknow:

 

[mopower1958]

What is the weight difference? Where are you guys shifting rpm wise? I say switch trucks too and see what happens.

 

[FlyingLow]

What is the weight difference? Where are you guys shifting rpm wise? I say switch trucks too and see what happens.

I was just thinking about weight. I think doing a few runs and then swapping drivers would help with this issue. Also any dyno runs as some trucks take to mods better than others.

 

[Begood]

You must also look at the fact that you have long tube headers, while the other truck has short tube headers. What this means is that at higher RPMs you will flow a little more exhaust. At low RPMs the difference will be almost nothing, but as you get to the higher RPMs the difference will increase. I think if you were to put the 4.56, or 4.88 gears in your truck you would see a difference, is it enough to justify the costs? Only you can say that.

Bill.

 

[ViperTruck2933]

weight is the same (except he weighs more than me)

mods are about the same but he has no cats, I have hi flows, and he has GEN IV shifter (marked advantage)

 

[Hamrhead]

As similar as the two trucks are, it's still apples to oranges with two different drivers.

It only makes sense, assuming there is traction, that 4.56's will improve your 60' performance over the 4.10's.

 

[FlyingLow]

Get some dynos of each truck on the same day. That might help shed some light on this. Just be sure to have video of the dyno as well as 3 witnesses. Also have the newspaper from that day in the video so we can verify that the dyno actually took place on that day.

 

[ViperTruck2933]

Get some dynos of each truck on the same day. That might help shed some light on this. Just be sure to have video of the dyno as well as 3 witnesses. Also have the newspaper from that day in the video so we can verify that the dyno actually took place on that day.

What...and get called out for a BS dyno No way man. j/k

We'll def try to do a dyno. I need to get back to the track again after I get the Gen IV shifter in next week too. :rock:

Before last night I was convinced the gears would make a difference. I don't believe that anymore. I think the gains you pick up in the first half of track are lost on the second half.

 

[FSTJACK]

4.56's will pull harder out of the hole but you'll reach peak RPM sooner.
4.10's will give your truck "longer legs" your top speed will be higher -on a longer run-
You were about a tenth behind him the whole race but see how your MPH is greater than his.
If given another 1/4 to 1/2 mile you would be even with him & passing(maybe)

DC switched to 4.56's in 05 for a reason:idea: same with 05's getting better front calipers:idea:

If youre breaking traction with the 4.10's (suffering 60ft's) 4.56 will make it worse.

The change to 4.56 gears will lessen the wheel spin issue.
You will have less wheel spin with the lower ratio gear.
It is also harder to break the tires loose with a numerically lower gear ratio.
You will be using HP to acelerate the vehicle instead of trying to do it with touque.
With a lower gear the tires will "turn over" and not spin as violently out of control as with a 4.10 or higher gear.

This is a very common misconception that has been going around for years.