Best place for a new crossmember for duals?

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Hey Shotgun, what headers are on the '78 olds Pontiac motor?gpchuck

Custom-made , the #7 & #8 go outside the frame rails.

You might be able to find a set of IA ones but they went out of business.

Also I believe there is a guy over on the PY forum making them.
 
I do like that TNT piece, but I don't see one listed for a TH200-4R. 🙁

I agree with Shotgun, anything to reduce the weight is a step in the right direction, even for just a cruiser. I know my car will never be a light weight, but luckily it already has all the factory aluminum goodies that were available. I'm changing a lot of parts that will add weight, (OD trans, 8.5" rear, power windows, etc.) so I'd like to offset that wherever possible.

It's just a matter of justifying the costs.

Shotgun, do you know a ballpark price on that Iceman crossmember?
 
If the "Iceman" crossmember supports the transmission in a drag car, then it must be decent enough for a regular duty vehicle. However, aren't those the ones that are a thin, round tube?

If anything, adding weight in the frame is not a bad idea. People put huge trailer hitches on because it supposedly ties the rear frame rails together. The G-Force, Jegster, Summit, etc. crossmembers are not that heavy, definitely not as heavy as a lot of trailer hitches.You won't lose any noticeable gas mileage, it won't make the car considerably slower, but they will make the chassis stiffer and make the car safer.

Basically, if you want a drag car, the "Iceman" one may be the one to consider. On a daily driven vehicle or on a car made to handle, I would go with the G-Force or similar piece.
 
Here is a link : http://cgi.ebay.com/ebaymotors/G-Body-M ... ccessories


"If the "Iceman" crossmember supports the transmission in a drag car, then it must be decent enough for a regular duty vehicle. However, aren't those the ones that are a thin, round tube? First, the xmember barely supports the transmission. 90% of the weight of the engine/tranmission package is supported my the engine mounts.As far as being small round tube, yes it is. It is made from tubular moly which is stronger then box steel.

If anything, adding weight in the frame is not a bad idea.Sorry, adding strength is good not weight People put huge trailer hitches on because it supposedly ties the rear frame rails together.I do this and it works. There comes a point where more IS NOT better. I have posted this before, adding a brace is good and takes away 95% of the twist. Adding a bigger,heavy brace may remove a little more but is not worth is when it comes to weight vs result The G-Force, Jegster, Summit, etc. crossmembers are not that heavy, definitely not as heavy as a lot of trailer hitches.My class II hitch weighs less the those xmembers. Also keep in mind when you add the trailer hitch or make a rear brace you are putting something where there was nothing before so you get a huge gain. In the case of a xmember you are replacing something that already existed so the gian in minimal You won't lose any noticeable gas mileage, it won't make the car considerably slower, but they will make the chassis stiffer and make the car safer.

Basically, if you want a drag car, the "Iceman" one may be the one to consider. On a daily driven vehicle or on a car made to handle, I would go with the G-Force or similar piece. I strongly disagree , see above
 
So, obviously the "Iceman" crossmember has benefits all around. You have a lot of experience with these. I wouldn't say the others are bad though. Any would be definitely better than an unmodified/modified original crossmember, right? I wouldn't turn down a used "heavy" crossmember for a good price though. Mine was $150 including UPS shipping. I still don't think chrome moly tubing would be stronger than thick steel plate (G-Force has rectangular tube steel for the center where the trans. mount goes, plate for the rest), but it is obviously good enough since it is used for roll cages, etc.

No need to break out the scientific data sheets stating they are though.
 
I think you would be real suprised on the strength of thin moly tubing vs. rect. steel tube... The moly is stronger. If it wasn't stronger racers wouldn't use it... You have two advantages with moly... Stronger than steel, lighter than steel.

Sure you may not notice a different on the street... But in all actuallity I would rather have a hunk of moly tubing. Street or Strip.
 
Reread my posts , never said that the others were bad, just not the logical choice in my opinion.

Also I have no vested interest in "selling" one over the other.

A new "iceman" is only $149 + shipping.

Ok,I will leave out the AISI stuff on the metals. :lol:

"Stronger than steel, lighter than steel."

Stronger yes, lighter no.

The short version is chromoly is stronger then mild steel by about 30 to 40%.

Chromoly and steel weigh about the same by volume. A pipe of the same wall thickness/diameter and length of each weigh about the same.

With chromoly you can just use less of it , smaller pipe or less wall thickness, to equal the strength of steel.

That is where the weight savings is from.
 
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