What exactly do subframe connectors do and do they really make a difference? - Ford Mustang Forum
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post #1 of 24 (permalink) Old 10-14-2008 Thread Starter
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What exactly do subframe connectors do and do they really make a difference?

I have a 89 Mustang GT, and my ride quality on a scale of 1-10 is about a 4. I have recently replaced my front struts and I plan to replace my front springs, rear shocks, and rear springs. I have read several old Mustang mags and they all say add subframe connectors. What do they do? And will I notice a difference in ride quality?
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post #2 of 24 (permalink) Old 10-14-2008
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Subframe connectors tie the front and rear subframe together to keep the torque from twisting the body. Since it's a unibody car, not a full frame, the connectors make the car more stable and solid.

If you were to get subframes welded in, you'd feel the difference within driving a block. It's that much of a difference, it'll probably take getting used to all over again.

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post #3 of 24 (permalink) Old 10-14-2008
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Quote:
Originally Posted by mobb1202 View Post
I have a 89 Mustang GT, and my ride quality on a scale of 1-10 is about a 4. I have recently replaced my front struts and I plan to replace my front springs, rear shocks, and rear springs. I have read several old Mustang mags and they all say add subframe connectors. What do they do? And will I notice a difference in ride quality?
Installing subframe connectors should be at the very top of your "planned performance mods and upgrades" list. Subframe connectors are a key component regarding traction on a Mustang, but a lot of people don't understand how or why they work, so here's the deal. The stiffer the chassis is, the more effectively the rear suspension can do its job and ultimately transfer the power to the ground. I'm sure you're somewhat familiar with the differences between horsepower and rear-wheel horsepower? When you compare your engine's HP output to the hp at your rear wheels, you're really measuring how how efficiently your car transfers energy. The more rigid suspension, body and driveline components are, the less power you lose before reaching the ground.
Thatís one of the big reasons why tube-chassied cars launch so hard and straight. The tubing provides an incredibly rigid frame, so there is no chassis to upset the suspension and spill off valuable power. With subframe connectors installed, the suspension links can do their work without having to overcome the force of a twisting chassis doing the funky chicken with the geometry.

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post #4 of 24 (permalink) Old 10-14-2008
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so you would say best bang for the buck susp. upgrade? cause they are cheap compared to everything else under there.

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post #5 of 24 (permalink) Old 10-14-2008
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If you have any power in your ride peel up the carpet on th drivers side and look at the floor pan next to the corner of the seat by the door. See the rip in the sheet metal. That is what you get from not having subframe connectors!
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post #6 of 24 (permalink) Old 10-14-2008
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Originally Posted by dakine858 View Post
Installing subframe connectors should be at the very top of your "planned performance mods and upgrades" list. Subframe connectors are a key component regarding traction on a Mustang, but a lot of people don't understand how or why they work, so here's the deal. The stiffer the chassis is, the more effectively the rear suspension can do its job and ultimately transfer the power to the ground. I'm sure you're somewhat familiar with the differences between horsepower and rear-wheel horsepower? When you compare your engine's HP output to the hp at your rear wheels, you're really measuring how how efficiently your car transfers energy. The more rigid suspension, body and driveline components are, the less power you lose before reaching the ground.
Thatís one of the big reasons why tube-chassied cars launch so hard and straight. The tubing provides an incredibly rigid frame, so there is no chassis to upset the suspension and spill off valuable power. With subframe connectors installed, the suspension links can do their work without having to overcome the force of a twisting chassis doing the funky chicken with the geometry.

Great response...........

But please elaborate

"force of a twisting chassis doing the funky chicken with the geometry"......


i have had cars do some strange stuff but never the funky:happydancer: chicken


just joking.......
post #7 of 24 (permalink) Old 10-15-2008
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A high powered car tends to have problems with their doors eventually, the gaps at the front of the doors will grow on the rider's side and close up on the drivers side, causing the doors to be hard to close or drag when opening. That's a sign you need connectors.

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post #8 of 24 (permalink) Old 10-15-2008
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I bought MAXIMUM Motorsports full length,on my 87 made a world of difference...I noticed the second I took a turn the strength and car felt more solid and made a world of diiference....
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post #9 of 24 (permalink) Old 10-15-2008
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dont forget about the instant response in a hard cornering conditions...even less "body roll"...such a nice thing to have hidden underneath your stang...

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You can also make home made subframes if your on a budget I dont know how well they work compared to some like steeda or any other brand thats made by a company but the silver coupe I got pictures of on my profile its got home made subframes and I can measure them out for you if you would like just get some square tube steel ill measure it for you in the morning!

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You can also make home made subframes if your on a budget I dont know how well they work compared to some like steeda or any other brand thats made by a company but the silver coupe I got pictures of on my profile its got home made subframes and I can measure them out for you if you would like just get some square tube steel ill measure it for you in the morning!
+1 I also have homemade subframe connectors. I fab'd them up with rectangular steel tubing and welded them on.

Just as a side note, welded subframe connectors work far better than bolt ons.

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I agree about welded vs bolt in. Just make SURE that you pull up the carpet before welding. I'd hate to read about your car burning to the ground!

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I measured the homemade subframes on the coupe they measured out to 41" long and its 1x1 square steel! You need pictures?

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Quote:
Originally Posted by rlg34750 View Post
Great response...........

But please elaborate

"force of a twisting chassis doing the funky chicken with the geometry"......


i have had cars do some strange stuff but never the funky:happydancer: chicken


just joking.......
Ahh damn! I knew I forgot to lay out the details, thanks for the reminder. Basically what's going to happen is you'll start out with a perfectly straight chassis and the first stage of Funk begins with "Basic" bending and twisting caused by everyday driving. As time goes on, your chassis will begin to learn the more advanced stages of the funky chicken and by the time you've got 100k miles under your belt, your car will have graduated to the "advanced" level. I attached pictures to help explain the Physics involved in this ultra complicated geometrical formulation.
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Oh jeez... :hihi:

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