F Body tunnel mount hardware size? - LS1TECH - Camaro and Firebird Forum Discussion



Suspension & Brakes Springs | Shocks | Handling | Rotors

F Body tunnel mount hardware size?

Reply
 
Thread Tools Search this Thread
Old 08-12-2017, 02:03 PM   #1
Teching In
Thread Starter
iTrader: (9)
 
Join Date: Oct 2009
Posts: 32
Default F Body tunnel mount hardware size?

Hey guys,

Just curious if anyone knows the bolt size and thread pitch for the 4 bolts that you'd attach a tunnel mounted torque arm crossmember or drive shaft safety loop to? I removed the stock cross member to make clearance for my true duals and now have no clue where that hardware went. Figured someone may know off the top of their head and be able to tell me before I dump out my bucket of random bolts and start trying them, and then proceed to throw them around the garage until I can find one that fits. Thanks in advance.
allblackedout5 is offline   Reply With Quote
Old 08-12-2017, 02:49 PM   #2
Staging Lane
 
Mark01Ws6's Avatar
 
Join Date: Mar 2013
Location: Cumberland Md
Posts: 58
Default

I may be wrong but I'm thinking they are 14mmX1.5mm
Definitely metric tough.
Good luck, I had a hell of a time getting my Tq arm to clear the exhaust and to line up with the holes. Had to use some strong persuasion skills both verbally and physically lol.
Mark01Ws6 is offline   Reply With Quote
Old 08-12-2017, 03:01 PM   #3
Teching In
Thread Starter
iTrader: (9)
 
Join Date: Oct 2009
Posts: 32
Default

Ok great! Thanks a lot... Yea I am going to be installing my new s60 tomorrow and/or Monday, for now I am going to TRY to keep my QA1 trans mounted torque arm as is and install the Midwest Chassis tunnel mounted driveshaft safety loop that I got, and hope to god it all clears my TSP exhaust and that the QA1 arm fits the s60 without a ton of modification... If it doesn't, well then I guess Midwest Chassis tunnel mount torque arm with the true dual crossmember gets ordered and I sell the safety loop since that crossmember has one built in. Thanks again for the help.
allblackedout5 is offline   Reply With Quote
Old 08-12-2017, 08:44 PM   #4
TECH Addict
iTrader: (4)
 
FirstYrLS1Z's Avatar
 
Join Date: Aug 2004
Location: Euclid,Ohio
Posts: 2,943
Default

If you referring to the original sheet metal brace that goes across the tunnel and bolts to a pad on each side,the bolts are 8mm by about an inch long.
FirstYrLS1Z is offline   Reply With Quote
Old 08-13-2017, 01:33 AM   #5
Teching In
Thread Starter
iTrader: (9)
 
Join Date: Oct 2009
Posts: 32
Default

Quote:
Originally Posted by FirstYrLS1Z View Post
If you referring to the original sheet metal brace that goes across the tunnel and bolts to a pad on each side,the bolts are 8mm by about an inch long.
thats exactly what I am talking about. Thanks for both replies.
allblackedout5 is offline   Reply With Quote
Old 08-14-2017, 10:20 AM   #6
TECH Junkie
iTrader: (40)
 
BMR Sales2's Avatar
 
Join Date: Nov 2008
Location: Seffner, FL
Posts: 3,254
Default

yep, 8mmx1.25 20mm
BMR Sales2 is offline   Reply With Quote
Old 08-14-2017, 09:30 PM   #7
TECH Apprentice
iTrader: (22)
 
5.7stroker's Avatar
 
Join Date: Apr 2009
Location: OH
Posts: 393
Default

Quote:
Originally Posted by BMR Sales2 View Post
yep, 8mmx1.25 20mm
I thought I saw 8mmx1.25 30mm mentioned here:

https://ls1tech.com/forums/suspensio...bolt-size.html
5.7stroker is offline   Reply With Quote
Old 08-15-2017, 10:14 AM   #8
TECH Junkie
iTrader: (40)
 
BMR Sales2's Avatar
 
Join Date: Nov 2008
Location: Seffner, FL
Posts: 3,254
Default

30mm is what we include with our aftermarket arms due to the added thickness of the bracket. The stock bolt I believe is 20mm or close to it. If you go with too long of a bolt, it will bottom out against the floor pan and not tighten down correctly. 20mm should be plenty of length for full thread engagement through the brace and not bottoming out into the floor
BMR Sales2 is offline   Reply With Quote
Old 08-15-2017, 10:23 AM   #9
TECH Addict
iTrader: (4)
 
FirstYrLS1Z's Avatar
 
Join Date: Aug 2004
Location: Euclid,Ohio
Posts: 2,943
Default

^^^ length isn't critical,a 20-25 long will do. I've got SLP subframe connectors and driveshaft loop tied into those points also so I used longer bolts. Also used SS bolts as things tend to corrode here in the rustbelt.
FirstYrLS1Z is offline   Reply With Quote
Old 08-15-2017, 11:34 AM   #10
TECH Apprentice
iTrader: (22)
 
5.7stroker's Avatar
 
Join Date: Apr 2009
Location: OH
Posts: 393
Default

Quote:
Originally Posted by FirstYrLS1Z View Post
^^^ length isn't critical,a 20-25 long will do. I've got SLP subframe connectors and driveshaft loop tied into those points also so I used longer bolts. Also used SS bolts as things tend to corrode here in the rustbelt.
25mm it is! Thanks
5.7stroker is offline   Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
HVAC Panel Hardware z28zane Chevrolet Camaro 1967-2002 0 03-22-2017 03:55 PM
Nitrous bottle Stainless steel tunnel mount and switch panels PwrdbyLS1 Parts Classifieds 2 11-18-2016 11:05 AM
Wtb tunnel mount torque arm rorric Parts Wanted 1 06-19-2016 11:14 AM
BMR Suspension New Product Release-Driveshaft Tunnel Brace for 2016 Camaro DTB005/6 BMR Suspension Gen 6 Camaro 2016+ Forum 0 03-24-2016 11:30 AM
What Else Is Needed For My Front Suspension and a Few Questions blk97z28 Suspension & Brakes 9 03-08-2016 07:02 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 08:46 AM.


 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: