63 Dodge Dart, now let me see;)

[Dne007]

My muffler came in, so I just felt compelled to get the exhaust hooked up. I just some hangars now, it's funny, I bought a small "muffler" claiming to be a cherry bomb, cranked the engine and it's darned quiet! looks nice though

this is the link to the Ebay muffler

Cherry Bomb Turbo Muffler with 2 In. Offset Inlet, 2 In. Center Outlet, and 20 | eBay

3.25 In. x 7.75 In. Oval Body Body Length: 14 In. Muffler Body Length Offset Inlet2 In. and Center Outlet 2 In. 20 In. Overall Length Turbo Muffler.

www.ebay.com

 

[Dne007]

Well, guess I'll be having a talk with Tire link come Monday~ you already listed a selection of tires, now which would I go with again without me having to go back in my own build thread to find

That's bigger than I was guessing, no wonder they are rubbing.


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[George Jets]

I am looking into the tire sizes, diameters, and tread faces now.

Just shooting from the hip at the moment, would think a P235 60/R15 would be a step in the right direction.

Like 26" diameter and 9" tread face.

VS what you have now:
27" diameter and 10.2" tread face of the 255 60/R15.

That is definitely an oversized tire for a 7" rim. Just curious, who recommended that tire size for you for your car?


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[JDMopar]

I'd say they would fit fine if it was an A body 8 3/4 with BBP axles. The 8 1/4's are a titch wider.

Edit- I went and looked at the chart, and if it is accurate, the 8 1/4 is 51 1/2 while the 8 3/4 is 52 5/8....so like the Chinaman said, I was wong! Since her car is mini tubbed, an 8 3/4 with a 50" width and some Dr. Diff axles cut to match it should work great with the wheels and tires she has. I'd still beat some relief into the wheel tub where it rubs and re-undercoat it!

 

[Dne007]

the reason I went with such a large diameter was because of the axle ration being 3:55, but I guess a half inch wouldn't make much difference.

I am looking into the tire sizes, diameters, and tread faces now.

Just shooting from the hip at the moment, would think a P235 60/R15 would be a step in the right direction.

Like 26" diameter and 9" tread face.

VS what you have now:
27" diameter and 10.2" tread face of the 255 60/R15.

That is definitely an oversized tire for a 7" rim. Just curious, who recommended that tire size for you for your car?


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[barbee6043]

My muffler came in, so I just felt compelled to get the exhaust hooked up. I just some hangars now, it's funny, I bought a small "muffler" claiming to be a cherry bomb, cranked the engine and it's darned quiet! looks nice though

this is the link to the Ebay muffler

Cherry Bomb Turbo Muffler with 2 In. Offset Inlet, 2 In. Center Outlet, and 20 | eBay

3.25 In. x 7.75 In. Oval Body Body Length: 14 In. Muffler Body Length Offset Inlet2 In. and Center Outlet 2 In. 20 In. Overall Length Turbo Muffler.

www.ebay.com

I think their turbo "Cheery Bomb" is just a sales tool. Would not the old CherryBomb be a glass pac, plenty loud, the shorter it is the louder, right all??
Having had several 63-6 A bodies, an 8 inch wheel would scare me bad, but looks like IF there was a 7 inch wheel, with a 4 inch BS, even that really wide tire might work, but I guess there is no such without a custom order.

Like he said, persevere!!! It will all be fine!!!

 

[Dne007]

This is just a variety of pictures

Drivers side

passenger

This is with the tire out 3/4 inch of course no air, no rim

The current line

black line is current wheel, moved over to the red line representing the 3/4 offset

 

[mopowers]

Absolutely nothing wrong with a 255/60R15 tire on a 7" wheel, although that is the minimum width wheel according to BFG. The problem is the axle/wheel combo doesn't center the wheel/tire in the wheelwell. I'd bet that some massaging of the inner wheel tub would allow to run what you've got. It wouldn't cost you a dime, and you'd still be able to run those great looking tires. There's nothing goofier than small tires on the back of one of these old Mopars.

 

[Dne007]

I Like your thinkin! the large rear tires really ROCK, and look great too. I have tomorrow to try massaging, I'll use my portapower and see what happens

Absolutely nothing wrong with a 255/60R15 tire on a 7" wheel, although that is the minimum width wheel according to BFG. The problem is the axle/wheel combo doesn't center the wheel/tire in the wheelwell. I'd bet that some massaging of the inner wheel tub would allow to run what you've got. It wouldn't cost you a dime, and you'd still be able to run those great looking tires. There's nothing goofier than small tires on the back of one of these old Mopars.

 

[Dne007]

oo, I can't say who recommended, it was partially my idea due to wanting as much tire as I can stuff. There were unknown variables, mainly the 8 1/4" axle from a '76 Dodge Dart. Really didn't find all this out until trying some tires, it's was kind of hit a miss, even for the fronts a while back.

I am looking into the tire sizes, diameters, and tread faces now.

Just shooting from the hip at the moment, would think a P235 60/R15 would be a step in the right direction.

Like 26" diameter and 9" tread face.

VS what you have now:
27" diameter and 10.2" tread face of the 255 60/R15.

That is definitely an oversized tire for a 7" rim. Just curious, who recommended that tire size for you for your car?


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[George Jets]

Tire size choices:

 

[Dne007]

Goodness
I'll take that to the tire store come Monday

Tire size choices:

View attachment 1716473944

 

[George Jets]

I use the 225 70/R15s on my truck. Fit good on a 7" rim.

70 series tires have a nicer wider footprint than stock, and taller diameter of 27.4" to work with your 3.55 low gears to give you some more road speed.

Tire goes straight up from the edge of the rim, does not Balloon out to rub the wheel well...


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[Dne007]

You really do know your tires ~ I suppose if it would give me a little more top end, I have no idea of what the Darts top end is going to be. I went through a chart and think I came up with 70mph at 3200 rpm~ I really don't remember. but I would like to at least 70 without blowing up my S6.
I'll keep this in mind when at the tire store, if they come in BFG's with white letters I'll definitely consider;)

 

[George Jets]

You could be running 3000 - 3500 at 65 - 70 mph with those 3.55s those are low gears.

Now take into consideration today's highway speeds are 75 - 80 mph, you could be pushing over 4000 rpm just to keep up and that is if you have the power to do so.

You are probably going to want to do some experimenting to find where you want to run it, tire size and all.

___________

As you are trying different tire combinations, make sure you have matching tires on at the same time so you don't burn out your (posi) Sure-Grip.


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[Dne007]

Yeah, I know regarding highway speeds, I might just be on the feeder streets to get places afar. We never go very far anyway. As time goes on, I may keep my eyes open for a different axle ratio, perhaps an 8 3/4 that is if this driveshaft will work with it. I'd hate to have another driveshaft made.
But for what I do, how I drive and have 4 other classics to drive, what I have will be just fine.
I can't thank you enough for your help, way back at the beginning of my build, and of course that goes for everyone that's offer advice, necessary parts too.

 

[George Jets]

Yep, BF Goodrich T/As 225 70/R15s come with the raised white letters, and the tires are available. No where near rubbing, as an added benefit with this tire size.

* * * * *

 

[George Jets]

For comparison, here is a 1974 Dart Swinger with 225/70R15 tires on the rear, with custom made 7" wide rims.

Fills out nice...


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[Killer6]

measuring from the mating surface to the most outer lip of the rim is 3 3/4
Just got a call from the Tire store~ he's ordering a wheel from American racing with 4.5" back spacing~ , plus 8" width vs my 7"

56 1/2 for the rear axle, flange to flange (flange meaning where the drum mates to.

Good Lord,.....only increasing the backspacing .75" & increasing the rim width 1.00" means the outer sidewall will be another 1/4" into the outer side of the tub,....NO that will not fix it, whether those 255's are a bit too wide for 7" rims or not, 8" rims won't fix anything & completely negate the gain in backspacing......
Massaging the tub is risky because there is a very small gap on those bodies tub-to-quarter, by the time You get the area to stretch into enough permanent deformation, it may come into contact with the quarter skin & screw up paint/filler/etc., heating & a hammer would've been the move before the car was finished......
Getting a 7" with the correct offset or downsizing the tires are the only correct fixes here. Not sure if the N95 'stangs ever used 15" rims, but they had more of a higher backspace style rim, but probably be 16"-17" only in the option wheels available.

 

[Dne007]

Yeah Killer, that's been mentioned about the micro amount of space between the inner/outer fender~ one bump too many would be really a bad thing. I have a great many things to talk with the tire people on Monday~ At this point, it's like forget everything I know, take the information from ya'll. Pretend like I don't have any tires/wheels at all. Thought I got a good deal on the rear axle out of that '76 Valiant~ now's proving to be a pain, but we'll get there.
Now, going to enjoy the extra hour and binge watch something

 

[Killer6]

Yeah Killer, that's been mentioned about the micro amount of space between the inner/outer fender~ one bump too many would be really a bad thing. I have a great many things to talk with the tire people on Monday~ At this point, it's like forget everything I know, take the information from ya'll. Pretend like I don't have any tires/wheels at all. Thought I got a good deal on the rear axle out of that '76 Valiant~ now's proving to be a pain, but we'll get there.
Now, going to enjoy the extra hour and binge watch something

That 8.25" shouldn't be the culprit,....this should show why...
An accurate 8 3/4" rear axle width list

 

[Dne007]

Gee Killer, that's incredible information!!!

I spoke with Glen, a member on here~ we talked about the rear axle gears that I have which is a 3:55. Now I want to change that to a 3:23 which would lead to the next tires for the rear.
Below is a wheel from my '67 Mustang, a 245/60 on a 14" cragar mag. Which would possibly be a choice possibly narrower.
so, tomorrow, check out a place that might be able to direct me to someone which can change out the gears. and tell the tire store to put things on hold until I get the rear gear taken care of.

 

[George Jets]

Gee Killer, that's incredible information!!!

I spoke with Glen, a member on here~ we talked about the rear axle gears that I have which is a 3:55. Now I want to change that to a 3:23 which would lead to the next tires for the rear.
Below is a wheel from my '67 Mustang, a 245/60 on a 14" cragar mag. Which would possibly be a choice possibly narrower.
so, tomorrow, check out a place that might be able to direct me to someone which can change out the gears. and tell the tire store to put things on hold until I get the rear gear taken care of.

View attachment 1716474196

View attachment 1716474197

View attachment 1716474198

View attachment 1716474199

View attachment 1716474201

You are a "Thinker"...

Of course that is why you love what you do.

I like that 3.23 idea, then choose tires from there as a basis.


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[GGs66GT]

What is the back space on the Mustang wheel and is it 7 or 8”wide ?

 

[Dne007]

Hi Glen;) 4" on the back spacing and 8" width. I could be off a tad on the back spacing, possibly 3 3/4;)

What is the back space on the Mustang wheel and is it 7 or 8”wide ?