LT-1 frame Vs Others
Thread Starter
Instructor
Joined: Jun 2018
Posts: 131
Likes: 15
From: France
LT-1 frame Vs Others
Hi,
I'm quite new on your forum.
I'have a technical question :
I'm actively searching a 70 or 71 LT-1 or 454. And somebody told me that the LT-1 models have like a bar or an additionnal portion liked to the frame, on rear if my memory is good.
Now I've been told that some LT1 were fakes one just because they use to screw that bar to make the confusion, while the original piece was welded to the frame.
Any clues about this ?
Also if you have tips helping me to identify a real LT1 from fake ones I will buy it too
!
Thank you.
Michael
I'm quite new on your forum.
I'have a technical question :
I'm actively searching a 70 or 71 LT-1 or 454. And somebody told me that the LT-1 models have like a bar or an additionnal portion liked to the frame, on rear if my memory is good.
Now I've been told that some LT1 were fakes one just because they use to screw that bar to make the confusion, while the original piece was welded to the frame.
Any clues about this ?
Also if you have tips helping me to identify a real LT1 from fake ones I will buy it too
! Thank you.
Michael
Safety Car
Joined: May 2008
Posts: 3,753
Likes: 721
From: Lafayette Louisiana
Interesting.
Hi,
I'm quite new on your forum.
I'have a technical question :
I'm actively searching a 70 or 71 LT-1 or 454. And somebody told me that the LT-1 models have like a bar or an additionnal portion liked to the frame, on rear if my memory is good.
Now I've been told that some LT1 were fakes one just because they use to screw that bar to make the confusion, while the original piece was welded to the frame.
Any clues about this ?
Also if you have tips helping me to identify a real LT1 from fake ones I will buy it too !
Thank you.
Michael
I'm quite new on your forum.
I'have a technical question :
I'm actively searching a 70 or 71 LT-1 or 454. And somebody told me that the LT-1 models have like a bar or an additionnal portion liked to the frame, on rear if my memory is good.
Now I've been told that some LT1 were fakes one just because they use to screw that bar to make the confusion, while the original piece was welded to the frame.
Any clues about this ?
Also if you have tips helping me to identify a real LT1 from fake ones I will buy it too
!Thank you.
Michael
Ah, Derek, and thanks, the "rear sway bar" and not welded for sure!
Here is a link to a LT-1 discussion, LT-1 attributes list at the bottom. (Wonder why I can not copy and paste anymore???)
Anyway, please go look in the General section here for a LT-1 discussion, should be still on the first page.
Good luck with the hunt!
Last edited by 20mercury; Jun 22, 2018 at 05:32 PM.
Drifting
Joined: Jun 2015
Posts: 1,345
Likes: 753
From: Doctors Inlet Florida
Here is just a couple of ways to tell a real LT-1
1. Single fuel line with no return line
2. Half shafts mounted with caps instead of straps
3. 6500 redline tach
4. 4 speed only (no automatic)
1. Single fuel line with no return line
2. Half shafts mounted with caps instead of straps
3. 6500 redline tach
4. 4 speed only (no automatic)
Safety Car
Joined: Nov 2008
Posts: 3,717
Likes: 551
From: Seattle Washington
If your planning on getting into the Corvette hobby before purchasing a collectable car You should read as much as You can so when You go look at a car You know what to look for. "The Corvette Black book" is a good start and then " Corvette by the Numbers" will turn You into an expert once You have it memorized. And there are many more books to read as well.
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Melting Slicks
Joined: Sep 2007
Posts: 2,149
Likes: 284
From: cary Il
no, all SB including LT-1s had the small front sway bar, no rear sway bar, HD rear end caps, not HD diff though
basically all base motor cars and LT-1s suspension, frame, body, interior is all the same except for the rear diff caps, BB hood, motor option
basically all base motor cars and LT-1s suspension, frame, body, interior is all the same except for the rear diff caps, BB hood, motor option
Le Mans Master
Joined: Oct 2007
Posts: 7,453
Likes: 976
From: RI, Now Franklin/Nashville TN
The 71 LT-1 did not have a rear sway bar, only the BB C3's came with the 9/16 inch rear bar. The front SBC sway bar was 3/4 inch and the front BB sway bar was 15/16 inch. The front spring rate for the SB C3 in 71 was 250 lbs and 284lbs/inc for the BB-either way VERY soft compared to the later C3 with the gymkhana sport suspensions.
This is the major difference ^^^^^^ between BB and SBC C3's..the frames are all the same...there is no difference in the frames.
Everything you need or want to know about C3's by year is here:
https://www.gmheritagecenter.com/doc...t-Corvette.pdf
The later SBC C3's like my 78 with gymkhana suspension had 550 front springs/292lbs rear spring, 1 1/8 front sway bar and 7/16 rear sway bar as a comparator...you can see how much stiffer the later C3 cars versus even the early C3 BB cars were........It is funny that the early C3 cars had the power but usffered with the handling versus the later C3 SBC that could easily out handle the early C3's but had much less power
This is the major difference ^^^^^^ between BB and SBC C3's..the frames are all the same...there is no difference in the frames.
Everything you need or want to know about C3's by year is here:
https://www.gmheritagecenter.com/doc...t-Corvette.pdf
The later SBC C3's like my 78 with gymkhana suspension had 550 front springs/292lbs rear spring, 1 1/8 front sway bar and 7/16 rear sway bar as a comparator...you can see how much stiffer the later C3 cars versus even the early C3 BB cars were........It is funny that the early C3 cars had the power but usffered with the handling versus the later C3 SBC that could easily out handle the early C3's but had much less power
Last edited by jb78L-82; Jun 23, 2018 at 07:19 PM.
Parts Sherpa
Joined: Feb 2017
Posts: 520
Likes: 98
From: ICE boneyard, Pa
I believe what Michael is referring to and I may be wrong is the cross member is welded in and not removable on the lt-1 while others are removable. It seems like a lot of answers are describing suspension stuff but the question was about frame differences and that is the difference with the frame.
Michael please let us know what specifically you are trying to figure out.
Michael please let us know what specifically you are trying to figure out.
Burning Brakes
Joined: Nov 2005
Posts: 1,062
Likes: 44
From: flemington n.j.
All 4 speed cars leaving the factory had a welded in transmission crossmember regardless of whether the car was an LT1, BB, or base model. All Automatic transmission cars had a bolt in transmission crossmember. No rear sway bar on LT1. No automatic LT1's.
Burning Brakes
Joined: Dec 2006
Posts: 979
Likes: 254
From: Bethlehem, PA
Hi,
I'm quite new on your forum.
I'have a technical question :
I'm actively searching a 70 or 71 LT-1 or 454. And somebody told me that the LT-1 models have like a bar or an additionnal portion liked to the frame, on rear if my memory is good.
Now I've been told that some LT1 were fakes one just because they use to screw that bar to make the confusion, while the original piece was welded to the frame.
Any clues about this ?
Also if you have tips helping me to identify a real LT1 from fake ones I will buy it too !
Thank you.
Michael
I'm quite new on your forum.
I'have a technical question :
I'm actively searching a 70 or 71 LT-1 or 454. And somebody told me that the LT-1 models have like a bar or an additionnal portion liked to the frame, on rear if my memory is good.
Now I've been told that some LT1 were fakes one just because they use to screw that bar to make the confusion, while the original piece was welded to the frame.
Any clues about this ?
Also if you have tips helping me to identify a real LT1 from fake ones I will buy it too
!Thank you.
Michael
Thread Starter
Instructor
Joined: Jun 2018
Posts: 131
Likes: 15
From: France
The 71 LT-1 did not have a rear sway bar, only the BB C3's came with the 9/16 inch rear bar. The front SBC sway bar was 3/4 inch and the front BB sway bar was 15/16 inch. The front spring rate for the SB C3 in 71 was 250 lbs and 284lbs/inc for the BB-either way VERY soft compared to the later C3 with the gymkhana sport suspensions.
This is the major difference ^^^^^^ between BB and SBC C3's..the frames are all the same...there is no difference in the frames.
Everything you need or want to know about C3's by year is here:
https://www.gmheritagecenter.com/doc...t-Corvette.pdf
The later SBC C3's like my 78 with gymkhana suspension had 550 front springs/292lbs rear spring, 1 1/8 front sway bar and 7/16 rear sway bar as a comparator...you can see how much stiffer the later C3 cars versus even the early C3 BB cars were........It is funny that the early C3 cars had the power but usffered with the handling versus the later C3 SBC that could easily out handle the early C3's but had much less power
This is the major difference ^^^^^^ between BB and SBC C3's..the frames are all the same...there is no difference in the frames.
Everything you need or want to know about C3's by year is here:
https://www.gmheritagecenter.com/doc...t-Corvette.pdf
The later SBC C3's like my 78 with gymkhana suspension had 550 front springs/292lbs rear spring, 1 1/8 front sway bar and 7/16 rear sway bar as a comparator...you can see how much stiffer the later C3 cars versus even the early C3 BB cars were........It is funny that the early C3 cars had the power but usffered with the handling versus the later C3 SBC that could easily out handle the early C3's but had much less power
