LT1-LT4 Modifications 1993-97 Gen II Small Block V8
View Poll Results: which sub-frame connectors?
Weld-in
50
79.37%
Bolt-on
13
20.63%
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sub-frame connector question??

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Old 01-01-2008, 01:02 PM
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Default sub-frame connector question??

is there any real benefit to using either type (weld-in or bolt-on)? i notice that most weld-ins are a good bit cheaper, but the bolt-ons i could install myself. also i would think that the integrity would be stronger with weld-in because they literally become fused with the body. what do you guys think? thanks.
Old 01-01-2008, 01:09 PM
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I have custom made chromemoly weld-ins that are only 10# total...

My goal with SFC's were to have the a good deal of strength and low weight, and this was the best way to accomplish that goal...

It all depends on what you are going to do with the car...
Old 01-01-2008, 01:14 PM
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how much did those cost?
Old 01-01-2008, 01:16 PM
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fab and installed price was about the same as getting a MS off the shelf set...
Old 01-01-2008, 01:18 PM
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cool, where would i go to have those made?
Old 01-01-2008, 01:21 PM
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I had them done in a performance fab shop in Maryland, but is was well worth trailering the car a few hours down there for it...

I don't think they are a sponsor here thought so I can't post the name in an open forum...
Old 01-01-2008, 01:30 PM
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hmm... it's definitely something to look into. i'll see what i can find around my area. so they were the same price for a lighter weight? how much do off-the-shelf sub-frames weigh?
Old 01-01-2008, 01:36 PM
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If I remmeber when I was doing research a few years back.

MS - averaged about 20-25#...
CM - averaged about 15-20#...

more for the X brace types...


*** EDIT ***

I just looked at a few and it looks like the weights have come down, spohn is now 17.5 for MS and 13 for CM...

Last edited by 1SlowFormula; 01-01-2008 at 01:42 PM.
Old 01-01-2008, 01:50 PM
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weld in for sure
Old 01-01-2008, 01:51 PM
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buy bolt in and then have them welded. at least then you can enjoy them and not have to look around for a shop right of way to install them
Old 01-01-2008, 03:40 PM
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sorry if it's a stupid question, but just to clarify CM=chromoly and MS="something" steel?
Old 01-01-2008, 03:44 PM
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MS = Mild Steel

IIRC
Old 01-01-2008, 03:53 PM
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Originally Posted by Badazz 97 TA
buy bolt in and then have them welded. at least then you can enjoy them and not have to look around for a shop right of way to install them

+2 that is what I did.
Old 01-04-2008, 03:34 PM
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Originally Posted by 1SlowFormula
I had them done in a performance fab shop in Maryland, but is was well worth trailering the car a few hours down there for it...

I don't think they are a sponsor here thought so I can't post the name in an open forum...

I found out that Tyson is a Sponsor here now so here is the info on who made mine...

https://ls1tech.com/forums/member.php?u=88442
Performance Auto Fabrication
Specializing in; Custom Roll Bars and Cages, Custom Exhaust, Custom Turbo Kits, Custom Fabricated Suspension Components, Suspension Tuning and Scaling, Fabrication/Welding for Street and Race Car Applications...New for 2007: Diesel Performance!!!
sales@performanceautofab.com
(410) 833-3713
http://home.comcast.net/~tfranklin5580/PAF/
Old 01-04-2008, 05:03 PM
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I just installed some bolt-ins onto my car and plan on having them welded at a later date. Bolting them on gives you 100% confidence they are exactly where they need to be. And unless under the car of a high HP motor, I wouldn't imagine the bolt holes stretching unless it's over an extended period of time..
Old 01-04-2008, 10:50 PM
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Get weld-on SFCs. A muffler shop can put them in for you. And you can't put them in wrong.
Old 01-04-2008, 11:59 PM
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Weld 4 Sure.
Old 01-06-2008, 09:00 PM
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buy the cheaper weld-ons and take them to a muffler shop
Old 01-13-2008, 12:49 AM
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Default heres another ?

If u put a cage in ur car do u still need sfc???
Old 01-13-2008, 01:00 PM
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YES subframes should always be installed..
especially if a roll bar or cage is installed you should have support along the rails and connecting the front to the rear..


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