Mopar perch on housing

Coleydog · 01-31-2023, 12:22 PM

To the Mopar group, what angle do you weld the perch (on housing) when using the Calvert setup and mono spring? Same as stock? A-Body car

Mark Yacavone · 01-31-2023, 12:49 PM

Quote:

Originally Posted by Coleydog

To the Mopar group, what angle do you weld the perch (on housing) when using the Calvert setup and mono spring? Same as stock? A-Body car

Why not ask Calvert?

Coleydog · 01-31-2023, 01:07 PM

Rather ask Mopar guys

GTX JOHN · 01-31-2023, 02:22 PM

We run 1 to no more than 2 degrees down.
If you miss it can be corrected with wedges from
most spring shops.
Try to not get housing real hot.

Coleydog · 01-31-2023, 03:26 PM

Thanks, some said 5 or 3 down, I like 1 or 2 idea

GTX JOHN · 01-31-2023, 10:01 PM

With the old SS Springs or Tri City Super Launchers
3 to 4 would be correct but not for the Calverts

Gmirza · 01-31-2023, 10:34 PM

I switched from SS springs to caltracs and didn’t move the perches. It’s the original housing with the perches in the factory spot. Car hooks all the time. Just check the housing alignment, my car was 3/4” different from one side to the other.

Larry Hill · 02-01-2023, 08:45 AM

The spring perch can be a real challenge. The housing has to be straight with the body. It needs to be zero toe in or out. Camber has to be zero or the tires won’t be 90* to the track. Everything may be just perfect until you weld on it. Then everything changes. A thick tube housing will still move as in a Dana 60 but not as much as an 8 3/4. The first one I did the axels would not go in without a hammer. The fun part was getting it straight again.
One to two degrees down

pmrphil · 02-01-2023, 10:29 AM

Weld on the opposite side of the tube and it will pull it back. Ugly, but it works. Or, get somebody with a jig to put new ends on it after you weld the perches on.

Coleydog · 02-01-2023, 11:18 AM

All good advice so far, racers know their stuff.

01-31-2023, 12:22 PM	#1
Coleydog Senior Member Join Date: Jul 2014 Posts: 572 Likes: 39 Liked 53 Times in 38 Posts	Mopar perch on housing To the Mopar group, what angle do you weld the perch (on housing) when using the Calvert setup and mono spring? Same as stock? A-Body car

01-31-2023, 01:07 PM	#3
Coleydog Senior Member Join Date: Jul 2014 Posts: 572 Likes: 39 Liked 53 Times in 38 Posts	Re: Mopar perch on housing Rather ask Mopar guys

01-31-2023, 02:22 PM	#4
GTX JOHN VIP Member Join Date: Jun 2009 Location: Boulder City, Nevada 89005 Posts: 2,733 Likes: 2,799 Liked 2,486 Times in 697 Posts	Re: Mopar perch on housing We run 1 to no more than 2 degrees down. If you miss it can be corrected with wedges from most spring shops. Try to not get housing real hot. __________________ John Irving 741 Stock 741 Super Stock

01-31-2023, 03:26 PM	#5
Coleydog Senior Member Join Date: Jul 2014 Posts: 572 Likes: 39 Liked 53 Times in 38 Posts	Re: Mopar perch on housing Thanks, some said 5 or 3 down, I like 1 or 2 idea

01-31-2023, 10:01 PM	#6
GTX JOHN VIP Member Join Date: Jun 2009 Location: Boulder City, Nevada 89005 Posts: 2,733 Likes: 2,799 Liked 2,486 Times in 697 Posts	Re: Mopar perch on housing With the old SS Springs or Tri City Super Launchers 3 to 4 would be correct but not for the Calverts __________________ John Irving 741 Stock 741 Super Stock

01-31-2023, 10:34 PM	#7
Gmirza Member Join Date: Dec 2018 Location: Massachusetts Posts: 176 Likes: 204 Liked 252 Times in 94 Posts	Re: Mopar perch on housing I switched from SS springs to caltracs and didn’t move the perches. It’s the original housing with the perches in the factory spot. Car hooks all the time. Just check the housing alignment, my car was 3/4” different from one side to the other. __________________ George Mirza D/SA 1236 ‘71 Duster 340

02-01-2023, 08:45 AM	#8
Larry Hill Live Reporter Join Date: Oct 2004 Location: Hickory, Ky Posts: 10,640 Likes: 1,939 Liked 10,714 Times in 2,230 Posts	Re: Mopar perch on housing The spring perch can be a real challenge. The housing has to be straight with the body. It needs to be zero toe in or out. Camber has to be zero or the tires won’t be 90* to the track. Everything may be just perfect until you weld on it. Then everything changes. A thick tube housing will still move as in a Dana 60 but not as much as an 8 3/4. The first one I did the axels would not go in without a hammer. The fun part was getting it straight again. One to two degrees down __________________ IHM Used Parts https://ihmusedparts.com 888-821-1817

02-01-2023, 10:29 AM	#9
pmrphil Member Join Date: Aug 2010 Location: CT Posts: 459 Likes: 1,805 Liked 348 Times in 152 Posts	Re: Mopar perch on housing Weld on the opposite side of the tube and it will pull it back. Ugly, but it works. Or, get somebody with a jig to put new ends on it after you weld the perches on. __________________ Phil Molski PMR Performance S/C 1623

02-01-2023, 11:18 AM	#10
Coleydog Senior Member Join Date: Jul 2014 Posts: 572 Likes: 39 Liked 53 Times in 38 Posts	Re: Mopar perch on housing All good advice so far, racers know their stuff.