355's to 391's how much does it help?

[Mopar-Man]

4.56 with a 4-speed or 4.10 with an auto.

 

[yellow rose]

I've worked on that car and truck all winter! I need to start getting some projects done around the house for the wife? That really cool wife? The one I want to keep around!

Yeah, I already figured she is WAY too good for you. Better suck it up and get the honey do's done with a smile on your face. If she kicks you out I can rent you a room.

 

[Moparhead]

I've worked on that car and truck all winter! I need to start getting some projects done around the house for the wife? That really cool wife? The one I want to keep around!

That’s the duster right? Pretty cool car yeah 355 would be awesome with a good low range. stoker I was just courious if you remember true change

 

[j par]

That’s the duster right? Pretty cool car yeah 355 would be awesome with a good low range. stoker I was just courious if you remember true change

No way of knowing that was the same time I put 200 mm stead of the 188 I believe that was a couple years ago also when I welded a roll bar in side and did a few other changes as well I think like 1.5 to 1 273 rockers to 1.6 to 1 Hughes rockers. 26 inch Street slicks to 28 inch full drag slicks could have offset everything?

 

[B3422w5]

On my old mild 360 combo, going from 3.55's to 4.10's picked me up half a second (14.0 to 13.5). Optimal gearing is combo dependent...every one is a little different.

Yep. Very true.

To the OP.... figure that change is going to make between 400-500 rpm difference at the stripe.
As an example an automatic car just hitting 6k at the stripe could be expected to run more like 6400+ at the stripe with the gear change.
I always figure 200-250 rpm per gear ratio..... 4.10 to 4.30.... 3.55 to 3. 73, etc..... it isnt exacting, but gives you a little idea. Some cars gear helps more than others

 

[Moparhead]

Yep. Very true.

To the OP.... figure that change is going to make between 400-500 rpm difference at the stripe.
As an example an automatic car just hitting 6k at the stripe could be expected to run more like 6400+ at the stripe with the gear change.
I always figure 200-250 rpm per gear ratio..... 4.10 to 4.30.... 3.55 to 3. 73, etc..... it isnt exacting, but gives you a little idea. Some cars gear helps more than others

Agreed