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Thread: Frame notching required?
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08-16-2020 #1Registered User
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- Sep 2009
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- Atlanta,Ga.
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Frame notching required?
I'm plan on running 315/35/20 tires out back on my 1970 Cutlass. The rims are 20"x11" +11 offset and 6.43" BS. Frame has a HPI customs frame bracing kit, suspension is a ridetech Coilover kit, and the rearend is a QP 9" that has been shortened 1" on each side. Will I have to notch the frame any with this setup?
I am SUCH a rookie to Pro-Touring
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08-16-2020 #2
This is what it will look like to the inside:
It will be almost touching the frame. You will need to have 3/4" to 1" notched out of the frame and then move the entire wheel well "inside" the same amount. I'm going through this process right now for a 325/30/19 tire. Mine is a little wider but your 6.43" BS on a 20x11 tire will put your tire almost exactly where mine is now to the inside on my 71 442. The good news is you will have more room to the outside so you should be good there. Maybe just roll the outer lip to be safe.
-JoeJoe Lincoln
Lime Green 71 Olds 442 Convertible
Upgrades thread: https://www.pro-touring.com/showthre...ible&highlight=
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08-16-2020 #3
Here's some pics of a notch for reference:
Joe Lincoln
Lime Green 71 Olds 442 Convertible
Upgrades thread: https://www.pro-touring.com/showthre...ible&highlight=
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08-16-2020 #4Registered User
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- Sep 2009
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- Atlanta,Ga.
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Close touch!
Great job you did there. The body has to come off the frame anyway so it won't be that big of an issue. What guage metal did you use? I will notch it 1" and call it good. Now my concern will be moving the inner fender 1". Hopefully I can just roll it. Don't want to go through the minitub ordeal.
I am SUCH a rookie to Pro-Touring
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08-16-2020 #5
That wasn't mine - just a pic for reference on what has to be done. The cutting on my frame starts next week. I'll post pics on the progress on my upgrades thread. The body is not coming off the frame so it's going to be fun.
Joe Lincoln
Lime Green 71 Olds 442 Convertible
Upgrades thread: https://www.pro-touring.com/showthre...ible&highlight=
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08-16-2020 #6Registered User
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- Sep 2009
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- Atlanta,Ga.
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Much power to you. I'm doing mine this week. Hopefully it will go well. Thankfully I have access to a plasma cutter which will make doing it a bit easier.
I am SUCH a rookie to Pro-Touring
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08-18-2020 #7Registered User
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- Sep 2009
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- Atlanta,Ga.
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- 169
I decided I will be notching my frame 1" and filling it with 1/8" plate. Going to also do a mini tub once I am done with the frame. To do the mini tub I will cut the inner well in half and add a 2" strip of sheet metal back down the middle. Then I will weld the 2 side back together with spot welds.
Does this process seem sound?I am SUCH a rookie to Pro-Touring
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08-18-2020 #8Registered User
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- May 2010
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- kitchener,Ontario,Canada
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