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Cutting the cross member

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Old Feb 12, 2006 | 06:25 PM
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Default Cutting the cross member

I am about convinced that if I am going to run a serpentine setup on this BB (which I really want to do) I am going to have to consider cutting the crossmember. How big of a deal will this be??
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Old Feb 12, 2006 | 06:44 PM
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Originally Posted by 2th farmer
I am about convinced that if I am going to run a serpentine setup on this BB (which I really want to do) I am going to have to consider cutting the crossmember. How big of a deal will this be??
If the motor is out you are only going to notch it. Use a cut off wheel, the 4 1/2 inch diameter ones in a small grinder. It makes short work of cutting an area out and then just weld a new pocket in.
No problem at all with the motor out.
I did it for my blower pulley
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Old Feb 12, 2006 | 06:45 PM
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Originally Posted by 2th farmer
I am about convinced that if I am going to run a serpentine setup on this BB (which I really want to do) I am going to have to consider cutting the crossmember. How big of a deal will this be??
CUT THE CROSSMEMBER so you can run a serpentine belt? Sorry for my ignorance, but belts have been around for a long time, are as reliable as dirt, almost never fail and, when they do, everyone carries them. Other than looks what does a serpentine belt do for you?

Sorry, just MHO.

Gary
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Old Feb 12, 2006 | 06:48 PM
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Originally Posted by GaryS
CUT THE CROSSMEMBER so you can run a serpentine belt? Sorry for my ignorance, but belts have been around for a long time, are as reliable as dirt, almost never fail and, when they do, everyone carries them. Other than looks what does a serpentine belt do for you?

Sorry, just MHO.

Gary
Why do you think EVERY new car made in the last 20 years has had a serpentine belt? PLUS it looks damn good!
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Old Feb 12, 2006 | 06:48 PM
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Originally Posted by 2th farmer
I am about convinced that if I am going to run a serpentine setup on this BB (which I really want to do) I am going to have to consider cutting the crossmember. How big of a deal will this be??

As Norval said, if you've got the tools - cutoff wheel and can weld - it's no problem at all.
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Old Feb 12, 2006 | 06:51 PM
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This is a last resort but I just want to see what is involved. I have spent the day looking for a serpentine system that will work and am getting frustrated. If I notch the crossmember, I can use the front compact system by March.[IMG][/IMG] The engine is out

Last edited by 2th farmer; Feb 12, 2006 at 06:56 PM.
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Old Feb 12, 2006 | 07:12 PM
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That looks like a nice frame/crossmember/car - is it worth it to you? It looks like someone or you has done alot of nice work already.
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Old Feb 12, 2006 | 07:39 PM
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Originally Posted by 2th farmer
This is a last resort but I just want to see what is involved. I have spent the day looking for a serpentine system that will work and am getting frustrated. If I notch the crossmember, I can use the front compact system by March.[IMG][/IMG] The engine is out
This would be a good time to add alot of gussets. Also box in the frame directly above the sway bars. Right now you have a weak U section. You want a box section instead.

Last edited by norvalwilhelm; Feb 12, 2006 at 07:43 PM.
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Old Feb 12, 2006 | 07:47 PM
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Norval, you continue to amaze and impress me.
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Old Feb 12, 2006 | 07:55 PM
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Originally Posted by 2th farmer
This is a last resort but I just want to see what is involved. I have spent the day looking for a serpentine system that will work and am getting frustrated. If I notch the crossmember, I can use the front compact system by March.[IMG][/IMG] The engine is out

Did you try these guys....

http://www.jonesracingproducts.com/

I use a bunch of their stuff...

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Old Feb 12, 2006 | 08:00 PM
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Originally Posted by 84rzv500r
Did you try these guys....

http://www.jonesracingproducts.com/

I use a bunch of their stuff...

Didn't see a kit to include A/C.
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Old Feb 12, 2006 | 08:21 PM
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A/C? We don't need no stinkin A/C
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Old Feb 12, 2006 | 08:25 PM
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Originally Posted by Monty
Norval, you continue to amaze and impress me.
Anyone born on July 29th has special skills
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Old Feb 12, 2006 | 09:20 PM
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Originally Posted by 2th farmer
Why do you think EVERY new car made in the last 20 years has had a serpentine belt? PLUS it looks damn good!

Maybe you didn't notice, but your car wasn't built in the last 20 years.

The point of my post was to say that doing something as radical as cutting your cross member so your 30 year old car can look a little newer seems, well, a bit radical. I am of the "if it ain't broke, don't fix it" school of engineering. Kind of like, why change to a pointless ignition when points will still allow you to drive home, even as they are failing. Millions and millions of cars have multiple belts and no serpentine belts and run reliably for tens of thousands of miles without fail.

OK, off my soapbox. Just don't read more into my post than I intended.

Gary
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Old Feb 12, 2006 | 09:26 PM
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Originally Posted by GaryS
Maybe you didn't notice, but your car wasn't built in the last 20 years.

The point of my post was to say that doing something as radical as cutting your cross member so your 30 year old car can look a little newer seems, well, a bit radical. I am of the "if it ain't broke, don't fix it" school of engineering. Kind of like, why change to a pointless ignition when points will still allow you to drive home, even as they are failing. Millions and millions of cars have multiple belts and no serpentine belts and run reliably for tens of thousands of miles without fail.

OK, off my soapbox. Just don't read more into my post than I intended.

Gary
Gary, I don't doubt your facts, I have replaced the original 454 with a full roller, AL head, AL intake 454. I also am installing a 500 TKO Keisler 5 speed. Just replaced all interior components. (over 10K so far) To have a bullet proof driver. I just want all new engine components too.
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Old Feb 13, 2006 | 02:23 AM
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Originally Posted by 2th farmer
Why do you think EVERY new car made in the last 20 years has had a serpentine belt? PLUS it looks damn good!
Why? It has nothing to do with looks. It has everything to do with economy. Serpentine allows a more compact engine ... fits in a more compact bay ... permits designers to make a more compact and lighter body design ... designers have more leeway in sheetmetal/lighting ... better fuel economy. Serpentine is easier & quicker to assemble on line ... fewer parts & less production cycle time means car is cheaper to manufacture. Serpentine uses less hp due to less slippage ... better fuel economy. Oh yes, serpentine requires less maintenance ... but it's a good bet that wasn't a primary concern when they tooled up for it.

If you had the time to scrounge a junkyard ... you might find something off a suburban, pu etc that'd work for you ... without hacking up your frame.
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Old Feb 13, 2006 | 08:32 AM
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Brent, Don't sweat cutting the crossmember....IMHO When you get around to installing that Tremec, you will be wrestling with whether or not to cut the rear transmission crossmember. If you decide to put a scatter shield on this torque monster, I am pretty sure I know what direction you will choose Yes it will be easy if you install the engine and transmission as one, but don't forget, someday you will want to change that clutch.

Bullshark

Last edited by Bullshark; Feb 13, 2006 at 10:52 AM.
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Old Feb 13, 2006 | 08:58 AM
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Brent, Looking at your post about March pulleys I noticed the pictures that PolishMike posted. Looks like he has a BB w/short WP and a damper pulley that has no offset. If you used that stuff you would not need to notch the crossmember but you would have to mount the accessories out wide.
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Old Feb 13, 2006 | 12:50 PM
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Originally Posted by 2th farmer
This is a last resort but I just want to see what is involved. I have spent the day looking for a serpentine system that will work and am getting frustrated. If I notch the crossmember, I can use the front compact system by March.[IMG][/IMG] The engine is out
If you run the March twin serp system you will only need to pound down that ridge you see on the X member just behind the two quarter sized round holes. You will pound that ridge down and round that area out. Can be accomplished in about 10 minutes, then touch up your paint.
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Old Feb 13, 2006 | 12:59 PM
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Originally Posted by norvalwilhelm
Anyone born on July 29th has special skills

I had forgotten about that.
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