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Bolt-In vs Weld-In

This is a discussion on Bolt-In vs Weld-In within the Suspension and Handling forums, part of the General Help category; Okay, I'm looking at some SFCs for my vert and people have suggested that I go with weld-in SFCs. I've ...

  1. #1
    Senior Member Naaman's Avatar
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    Cayanne
    98 Z28 Vert M6

    Bolt-In vs Weld-In

    Okay, I'm looking at some SFCs for my vert and people have suggested that I go with weld-in SFCs. I've noticed that bolt-ins are also an option.

    My question is this:
    Is there a performance difference between bolt-ins and weld-ins? Also it seems like if I need access to certain parts of the drive train, the weld-ins could complicate things by being a permanently "integrated" part of the car, whereas the bolt-ins could be taken right off no problem. Also, the bolt-ins seem easy enough to DIY, whereas I don't have means to weld anything onto my car.

    What would I be sacrificing by going with bolt-ins instead of weld-ins? Also, if I get the bolt-ins, can I just weld them on later for the same effect as original weld-ins?

  2. #2
    Slow'er'Ass Mr. Luos's Avatar
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    Bolt-ins can shift.
    Weld-ins will not.

  3. #3
    Moderator 35th-ANV-SS's Avatar
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    You can always bolt them in now and weld them later. I personally got weld-in and would suggest the same.

  4. #4
    Member DaddysZ28's Avatar
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    2002 Camaro Z28

    I just got my UMI weld-ins put on last week, and couldn't be happier. For stability reasons I would run the weld-ins, just make sure you have a shop that knows what their doing do the install. You won't be disappointed.

  5. #5
    Member zmg00camaross's Avatar
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    Weld in for sure with the vert.

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    NY Representative basballny2's Avatar
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    i still havent bought into this whole weld-in with just basic bolt ons. if you plan on getting the car into the 425+ RWHP range id say weld em, otherwise your bolts wont snap and from my expirience, wont move either.

  7. #7
    Member xmarkx's Avatar
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    I'm going to get bolt in sfc's so I can install them in the driveway and down the line if I ever start making big power I'll have them welded.

    question: when getting sfc's welded, the full weight of the car needs to be on the suspension but when your just bolting the sfc's does this matter as much?

  8. #8
    Moderator 35th-ANV-SS's Avatar
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    Quote Originally Posted by basballny2 View Post
    i still havent bought into this whole weld-in with just basic bolt ons. if you plan on getting the car into the 425+ RWHP range id say weld em, otherwise your bolts wont snap and from my expirience, wont move either.
    My goal is 520-540rwhp

  9. #9
    Member pewterz55's Avatar
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    -full weight must be on suspension for the bolt ins as well.
    -i did bolt ins and got them welded shortly after i installed them cuz they were creaking and rattling. if i could do it again i would just go with the weld ins and have a shop weld em up because your most likely going to have them do it eventually.

  10. #10
    NY Representative Vertiviper's Avatar
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    I bolted mine in..no creeks, no sounds..car feels good. Just gotta torque them right and follow directions.

    Did I meantion torque them right? You'll need to torque them correctly. Make sure you torque them correctly. Torqueing them correctly is important.


    Torque.

  11. #11
    Member pewterz55's Avatar
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    Quote Originally Posted by Vertiviper View Post
    I bolted mine in..no creeks, no sounds..car feels good. Just gotta torque them right and follow directions.

    Did I meantion torque them right? You'll need to torque them correctly. Make sure you torque them correctly. Torqueing them correctly is important.


    Torque.
    Mine were torqued to spec and still creeked. so i followed the directions and increased the torque. there was creeking. so i had a shop weld em. bamm no creeks. i followed the directions word for word still creeked.
    -o and i believe the weld ins are bit cheaper if that matters at all.

  12. #12
    Blown, Stroked, & Sprayed

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    Get the weld in. I run BMR and they don't get in the way.

  13. #13
    Slow'er'Ass Mr. Luos's Avatar
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    Quote Originally Posted by xmarkx View Post
    I'm going to get bolt in sfc's so I can install them in the driveway and down the line if I ever start making big power I'll have them welded.

    question: when getting sfc's welded, the full weight of the car needs to be on the suspension but when your just bolting the sfc's does this matter as much?
    Power level shouldn't change your mind on which SFC's to get.
    Power or not, they should be in correctly and not able to shift.

    The SFC's are big for chassis stability, even on a stock car.

  14. #14
    Hello
    Like mentioned above UMI Performance offers both for the convenience of the customer. Not all of the customers have welders nor want to weld on the vehicle. So then in that case they just go with the bolt on SFC's. Then if needed later down the road you can always have them welded. If you have any other questions feel free to ask.
    Thanks
    Brad

  15. #15
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    ^^ Very happy with my UMI bolt-ins and have had no issues since installation almost a year ago.

  16. #16
    Senior Member Schmalgar's Avatar
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    04 Cobra 'vert - M6 mysti
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    I talked to a guy at a shop here where I plan to have some work done in the near future. He basically said what many have said on here, that it's good to start with bolt-on and then weld them on later. It lets you verify that they are on correctly and the drive feels right before permanently welding them in. And it lets you pull them back out if you're doing any other work under there, like exhaust work.

    I'm a noob so I don't have my own opinion, that's just what I was told when I asked about it.

  17. #17
    Senior Member Naaman's Avatar
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    98 Z28 Vert M6

    Okay, cool. I think I'll go with bolt-ins first and then weld them on when I get the chance.

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