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Subframe connectors, weld vs bolt

This is a discussion on Subframe connectors, weld vs bolt within the Suspension and Handling forums, part of the General Help category; I know that you need to have a load on the tires when welding up your sfc's but do you ...

  1. #61
    Member Kup98ss's Avatar
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    I know that you need to have a load on the tires when welding up your sfc's but do you need to have a load when using bolt ons? I wouldn't think it would matter but I thought I would ask.

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    Quote Originally Posted by oneBADDz View Post
    you need to get the whole car up and level, as if it were sitting like it would ride

    Then why did mine go on easy as pie with just the front wheels on ramps?

  3. #63
    SUPREME member-oderator oneBADDz's Avatar
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    Quote Originally Posted by v8unleashed View Post
    Then why did mine go on easy as pie with just the front wheels on ramps?
    Just because it works without doing it per the instructions that every single manufacurer recommends doesn't mean it should be recommended to everyone that you don't follow them

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    Quote Originally Posted by Kup98ss View Post
    I know that you need to have a load on the tires when welding up your sfc's but do you need to have a load when using bolt ons? I wouldn't think it would matter but I thought I would ask.
    Yes. If there's any twist or misalignment in the body whether it's from an accident, abuse or from the way the car is lifted during the installation then you'll 'lock in' that twist when you do the welds or tighten up the bolts. At least with the bolt-ons, you can correct the problem by loosening the bolts and retightening them with the car's weight resting on the tires. The car doesn't have to be perfectly level, eyeball level is fine but the weight of the car must be supported ONLY by the tires, as if you were driving it.

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    Member Kup98ss's Avatar
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    Quote Originally Posted by Fastcar View Post
    Yes. If there's any twist or misalignment in the body whether it's from an accident, abuse or from the way the car is lifted during the installation then you'll 'lock in' that twist when you do the welds or tighten up the bolts. At least with the bolt-ons, you can correct the problem by loosening the bolts and retightening them with the car's weight resting on the tires. The car doesn't have to be perfectly level, eyeball level is fine but the weight of the car must be supported ONLY by the tires, as if you were driving it.

    Would I be able to put them on when the car is on jack stands, leaving all of the bolts loose. Then lower the car onto the floor to tighten them. That sounds like it would work, I should be able to reach in there to tighten all the bolts.

    What do you guys think? Sound good to me but some times I don't crap.

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    Quote Originally Posted by Kup98ss View Post
    Would I be able to put them on when the car is on jack stands, leaving all of the bolts loose. Then lower the car onto the floor to tighten them. That sounds like it would work, I should be able to reach in there to tighten all the bolts.

    What do you guys think? Sound good to me but some times I don't crap.
    This is what im going to do when i find the free time.

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    Member Kup98ss's Avatar
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    Quote Originally Posted by jagleaso View Post
    This is what im going to do when i find the free time.

    it's good to know some one else out there thinks like me.

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    Senior Member kool-aide's Avatar
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    Well I was thinking the same thing. I was going to email or call UMI to ask them how they felt about it.

    But I was going to try putting them on with the car in the stock height position. It would be a real tight fit, but I think I can do it.

  9. #69
    Junior Member DS-LS1's Avatar
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    I am thinking of installing the 2 point UMI bolt-in SFCs, but they only come tubular.

    Has anyone had any problems jacking their car by the tubular SFCs ? I have read many posts about the boxed weld-in SFC being used as jacking points. The car can be jacked up anywhere on the Boxed SFC. I cant find anything on the tubular SFCs being used for jacking. Because the Boxed SFCs are stronger than the Tubluar, Would I be able to jack my car up anywhere under the tubular SFC, or will it bend ?

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    Quote Originally Posted by DS-LS1 View Post
    I am thinking of installing the 2 point UMI bolt-in SFCs, but they only come tubular.

    Has anyone had any problems jacking their car by the tubular SFCs ? I have read many posts about the boxed weld-in SFC being used as jacking points. The car can be jacked up anywhere on the Boxed SFC. I cant find anything on the tubular SFCs being used for jacking. Because the Boxed SFCs are stronger than the Tubluar, Would I be able to jack my car up anywhere under the tubular SFC, or will it bend ?
    It won't bend. Heck you can jack it up at the front of the SFC and the rear of the car comes up pretty high too once you install them

  11. #71
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    Another great way to get the car higher and the suspension loaded is by putting all four tires under some cinder blocks. Jacked up the rear first I think, then did the front. Easy as cake.

    2000 SS M6 #5445 - 13k miles
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    do they make 3pts for convertables? the extra support usually gets in the way.

  13. #73
    Senior Member kool-aide's Avatar
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    I don't know. I have only seen 2 pt from BMR.

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