Frame strengthening needed? - Chevelle Tech
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  #1  
Old Jun 16th, 11, 3:01 PM
jr2009 jr2009 is offline
Jestin
 
Join Date: May 2009
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Default Frame strengthening needed?

Hey Guys,

one quick question, I have a 67 Chevelle Malibu I'm working on. I am building a 454 motor to go into it. now when the motor is all said and done, should be pumping out about 450hp/500tq approx.

would the frame be able to handle that power rating? or should I be making modifications to the frame? (boxing, bracing)

The car originally had a 283 sbc in it, if that helps.

Thanks for any input
JR
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  #2  
Old Jun 16th, 11, 4:04 PM
GoFast Beaumont GoFast Beaumont is offline
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Default Re: Frame strengthening needed?

bah.....
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  #3  
Old Jun 16th, 11, 4:45 PM
71Avido 71Avido is offline
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Matt
 
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Default Re: Frame strengthening needed?

I'll say you should be fine.
If it will give you piece of mind knowing that your frame is a lil' stronger then I say brace it.

I'll be bracing my frame.
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  #4  
Old Jun 16th, 11, 4:51 PM
the heckler the heckler is offline
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Default Re: Frame strengthening needed?

my '67 came with a 396/325 motor. dont think there is any difference in the frame but am no expert. will recommend bracing up the rear control arms to frame connection as was done on some bb cars. my current motor is a 496/600hp version. there have been no problems with the frame so far...
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  #5  
Old Jun 17th, 11, 12:09 AM
dude67 dude67 is offline
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dude67=John C.
 
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Default Re: Frame strengthening needed?

SS/BB cars were braced in the rear box cross member area. If you have a factory assembly manual you will find where they attach. I have heard of some members here box there frames complete. Instead of like a "C" channel down below the rockers panels on the frame it's boxed. If your not racing I wouldn't do it. Where the frames tend to crack is right at the fire wall. Where the frame width comes together for the engine.
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  #6  
Old Jun 17th, 11, 1:46 AM
66138 66138 is offline
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Default Re: Frame strengthening needed?

I am thinking the same, doing the HPI frame tubing kit on my 66 502 chevelle. I am not auto-crossing, but I want to keep the body pillars from cracking doing some good launches etc so keep the frame twisting to a minimum. is this overkill ?
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  #7  
Old Jun 17th, 11, 1:53 AM
rlinke rlinke is offline
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Default Re: Frame strengthening needed?

My build is going a little different direction (750+ hp fuel injected 565), however, I too, decided to strengthen the frame on my '70 coupe. I bought a kit from Tyler @ HPI Customs in April and we're just about finished with the frame. His kit went in without many surprises & I found a TON of areas on the frame that we decided to weld/re-weld since we are planning to throw the car around autoX and road courses once it's done.






(note - gotta change the sig below; 700R4 has been ditched for a 4L80e with FAST EZ-TCU and Shiftworks mechanical speedo tail)
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  #8  
Old Jun 17th, 11, 1:58 AM
66138 66138 is offline
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Default Re: Frame strengthening needed?

wow, that looks sweet ! I have been talking with Tyler too so just wanted to check with some experience here on the site. I think I will do the same, only I am going Keisler 5 spd
What A arms spindles and rotors are you using ?
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  #9  
Old Jun 17th, 11, 5:01 PM
jr2009 jr2009 is offline
Jestin
 
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Default Re: Frame strengthening needed?

Hey thanks guys for the input. I looked a little more into that HPI kit some of you were talking about and looks like for a sticker price of around 600 I think I might do it. I figure I might as well to add some strength while I have the body off the frame anyways

Thanks again
JR
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  #10  
Old Jun 17th, 11, 6:00 PM
Freddy Mercado Freddy Mercado is offline
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Default Re: Frame strengthening needed?

That frame looks beefy! Very nice.
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  #11  
Old Jun 18th, 11, 4:18 PM
rlinke rlinke is offline
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Rob
 
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Default Re: Frame strengthening needed?

Quote:
Originally Posted by 66138 View Post
What A arms spindles and rotors are you using ?
SPC Adjustable uppers and SPC tubular lowers. AFX Spindles, Baer 14" Pro Plus 6 piston fronts (SS4+ 13" 4 pistons on the rear).

I think this combo for a GM A-Body should just be called a "Savitske Special", as it seems pretty popular. Unfortunately it will be September before I have it far enough along to actually try it out.
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1970 Shadow Gray Chevelle Build-up
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565 Dart FAST XFI
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  #12  
Old Jun 18th, 11, 6:42 PM
cuisinartvette cuisinartvette is offline
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Default Re: Frame strengthening needed?

Edelbrock sells those braces for the rear and they fit perfect.
Behind the rear shocks where that stamped sheetmetal meets the rail I use some rectangle tube, cut slightly into the stamped pieces and welded it all in together, night and day difference there.

On the front was thinking creating a Kbrace would really help out on the twist bit. Look under some C4s or some late model Silverados for some ideas.
You could make those real easy.
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  #13  
Old Jun 20th, 11, 1:04 PM
71Avido 71Avido is offline
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Matt
 
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Default Re: Frame strengthening needed?

Quote:
Originally Posted by jr2009 View Post
I looked a little more into that HPI kit some of you were talking about and looks like for a sticker price of around 600 I think I might do it.

Thanks again
JR
And about $150 to ship.

I just made the same kit with a lot of material left for a little over $350, given theirs looks cooler.
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  #14  
Old Jun 20th, 11, 7:29 PM
F1 Speed F1 Speed is offline
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Default Re: Frame strengthening needed?

Quote:
Originally Posted by 71Avido View Post
And about $150 to ship.

I just made the same kit with a lot of material left for a little over $350, given theirs looks cooler.
Any pics of the fabricated parts or are you just reffering to the raw materials? I can see an easy $350.00 in materials if you used DOM for the tubing tubing, 3/16 MS plate & hardware. $750.00 shipped for prefabbed parts that are ready to weld up when you get them is a pretty fair deal when you consider the time it takes to fab them youself. As I recall, I had approximatly $550.00 in doing mine myself and had access to a good tubing bender, sheet metal break, CNC Laser cutter for the boxing plates and body mount reinforcments. When I do my next one I'll buy this kit.
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  #15  
Old Jun 20th, 11, 8:04 PM
71Avido 71Avido is offline
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Matt
 
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Default Re: Frame strengthening needed?

Quote:
Originally Posted by F1 Speed View Post
Any pics of the fabricated parts or are you just reffering to the raw materials?
Just raw materials. I didnt include my time in that price. Honestly i will say that this project will take a lot longer than I thought. In the end it wont be as pretty or easy but I actually enjoy doing this sort of thing, plus its nice being able to say that I did it all myself.
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