70 Challenger Mini Tub.

[1moretoy]

Hey all, I'm going to start replacing my trunk pan this weekend and was planning to mini tub at the same time. I opted for the two piece pan kit as shipping was unbelievable for a 1 piece. They wanted $380 just for freight. I figured an extra weld was worth the savings. For some reason my tubs look like they were widened but I'm not positive. I feel like the raised area in the middle of the tubs would be smooth not raised. Can you tell me if these look stock to you.

As far as the mini tub goes I've read a few different ways to do this. Any suggestions on this? I was looking at the US car tool kit but they sure want a lot of money for some sheetmetal. I was thinking about cutting the tub moving it over to frame and welding. Then just add a strip of metal, weld it up and seam seal it. Green line is where i plan to cut and weld in the strip of sheetmetal. Let me know your thoughts.

Regards,

 

[71RRhi]

Those are stock. You can widen them the way you stated. AMD sells three inch wider inner wheel tubs. Might be less work.

 

[Chryco Psycho]

I have done what you plan many times , cutting the tub moving it over to the frame & filling the gap , not hard to do .

 

[1moretoy]

Do I need to do anything to the frame? Without a mini tub and a narrowed rear end how wide of a wheel can I fit. Trying to figure out if the results are worth the work.

 

[1moretoy]

Those are stock. You can widen them the way you stated. AMD sells three inch wider inner wheel tubs. Might be less work.View attachment 112324

Thanks, I saw those but figured same amount of time but cost is much higher.

 

[Tig]

Unless you move the springs into the frame rails you won't gain anything. We've moved our springs adjacent to the frame rails, we could probably fit a 12" rim and a 14" shoulder width tyre in there now, the stock wheel wells are pretty big. We're currently running a drag radial which measure 30" dia and 12.7" at the shoulder, this is on a 10 x 15 dbl beadlock wheel with a 5" back spacing, plenty of room for those.

HTH's

 

[1moretoy]

Unless you move the springs into the frame rails you won't gain anything. We've moved our springs adjacent to the frame rails, we could probably fit a 12" rim and a 14" shoulder width tyre in there now, the stock wheel wells are pretty big. We're currently running a drag radial which measure 30" dia and 12.7" at the shoulder, this is on a 10 x 15 dbl beadlock wheel with a 5" back spacing, plenty of room for those.

HTH's

I'm using Alterktion rear street lynx setup so the springs are going away.

 

[1moretoy]

Also, I'm having Bill narrow the rear end. When that happens can I get a 11" or 12" wide wheel without the mini tub?

 

[Tig]

Also, I'm having Bill narrow the rear end. When that happens can I get a 11" or 12" wide wheel without the mini tub?

OK, I didn't realise you were using that rear. I'd guess it depends on the size of the tyre as to how much clearance you have, if you lower the car you might use up some height clearance which might use up some side clearance because of the compound curve of the stock wheel tub.
TBH with what you are going to do anyway, I'd minitub it now and square the inners or use a short radius for the most room.

 

[6PKRTSE]

Mine is mini tubbed moved to the frame rails with Caltracs and split mono leafs. I run 15x12 wheels with 315/15/60 Drag Radials or 29.5"×10.5W slicks.

 

[1moretoy]

Hey all, I'm at the point where I need to make a decision to mini tub or not. How wide of a tire/wheel could I run by moving the 4link inboard and narrowing the rear end 2.5 inches keeping the stock wheel tubs in place? I'm trying to determine if the extra work is worth the 2" or so? I spoke with Bill @ RMS and he suggested cutting the outer flange off of the frame rails and welding the wheel tub directly to the frame. I'm a little confused how that works as it seems the wheel tub would be angled as the frame has a slight curve to it. Maybe I'm just over thinking it.....

 

[6PKRTSE]

Pie cut the inner well and conform to the frame rail. Punch/drill holes along along inner well edge. Weld to frame rail. Weld up pie cuts. Grind welds smooth.

 

[1moretoy]

So does the inner wheel tub sit against the frame all the way from the trunk to back seat area or mainly in the trunk area only?

 

[Pistolgrip496]

I just finished installing mini tubes in my Challenger.
I used AMD inner and outer wheel wells . You have to remove the flange on the outer part of the frame rails so that the wheel well can lay flat on the vertical surface of the frame rail. I also notched the frame in approximately 1-1/4” for the last third of the wheel well other wise the wheel wells will not fit.
Uscar tool sell that kit.

 

[1moretoy]

I just finished installing mini tubes in my Challenger.
I used AMD inner and outer wheel wells . You have to remove the flange on the outer part of the frame rails so that the wheel well can lay flat on the vertical surface of the frame rail. I also notched the frame in approximately 1-1/4” for the last third of the wheel well other wise the wheel wells will not fit.
Uscar tool sell that kit.

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Thank you for the great reference photos. Is the pan flush with the frame all the way down the to the end of the tub. Essentially where I have the yellow line? I have to cut the frame flange and pan flush with the frame rail all the way as well?

 

[Pistolgrip496]

No only have to notch the last 12 inches behind the axle nothing in front of the axle

I can fit 345/35-19 tires with 1 inch clearance both sides

 

[Pistolgrip496]

It’s hard to tell from the pictures if you look at the bottom of the frame rail there a two bolt holes that a factory bracket bolts to I believe it was used to secure the car doing shipping from the factory that’s where the notch ends you need the frame rail to parallel the inner tub

 

[6PKRTSE]

Pistolgrip496's photos are pretty much how I did mine as well.

 

[1moretoy]

Any photos on how you finished this part? I really appreciate the help guys!!!

 

[Pistolgrip496]

Hope this helps