LTX and LSX Putting LT1s, LS1s, and their variants into Third Gens is becoming more popular. This board is for those who are doing and have done the swaps so they can discuss all of their technical aspects including repairs, swap info, and performance upgrades.

LT1 Throttle Bracket Modification

Thread Tools
 
Search this Thread
 
Old Jul 10, 2010 | 08:09 AM
  #1  
MattODoom's Avatar
Thread Starter
Senior Member
iTrader: (1)
 
Joined: Jul 2005
Posts: 624
Likes: 0
From: SW Michigan
Car: '88 G T/A
Engine: L98
Transmission: 700R4
Axle/Gears: 3.27 9 Bolt
LT1 Throttle Bracket Modification

Does anyone have a picture of how they modified their LT1 throttle bracket to fit the 90-92 thirdgen throttle cable? I'm assuming I just need to file off the nub that stops it from sliding over all the way, but then what will hold it from popping back out the side?
Reply
Old Jul 10, 2010 | 02:51 PM
  #2  
Klortho's Avatar
Supreme Member
 
Joined: May 2004
Posts: 2,924
Likes: 1
From: Kingston, Tn
Car: 1987 GTA
Engine: LT1
Transmission: T56
Axle/Gears: 9 bolt 3.70 posi
Re: LT1 Throttle Bracket Modification

I filed down the piece on the throttle cable itself and not had any problems at all with it.
Reply
Old Jul 10, 2010 | 07:44 PM
  #3  
MattODoom's Avatar
Thread Starter
Senior Member
iTrader: (1)
 
Joined: Jul 2005
Posts: 624
Likes: 0
From: SW Michigan
Car: '88 G T/A
Engine: L98
Transmission: 700R4
Axle/Gears: 3.27 9 Bolt
Re: LT1 Throttle Bracket Modification

Klortho, can you take a picture of how you modified it?
Reply
Old Jul 10, 2010 | 10:09 PM
  #4  
Klortho's Avatar
Supreme Member
 
Joined: May 2004
Posts: 2,924
Likes: 1
From: Kingston, Tn
Car: 1987 GTA
Engine: LT1
Transmission: T56
Axle/Gears: 9 bolt 3.70 posi
Re: LT1 Throttle Bracket Modification

Sure, it'll be in the morning, but I'll snap a shot of it.
Reply
Old Jul 12, 2010 | 05:35 PM
  #5  
SomeGuy25thZ's Avatar
Senior Member
 
Joined: Sep 2007
Posts: 599
Likes: 1
From: Long Island, NY
Car: 1992 z28
Engine: 383 LT1 in the works
Transmission: T-56 in the works
Axle/Gears: 3.73 in the works
Re: LT1 Throttle Bracket Modification

Originally Posted by Klortho
I filed down the piece on the throttle cable itself and not had any problems at all with it.
I am trying to figure out the throttle cable issue as well. what do you mean by filing down the piece on the throttle cable iteslf?

the connection to the accelerator and to the TB is the same between the thirdgen and lt1?
Reply
Old Jul 18, 2010 | 12:42 PM
  #6  
MattODoom's Avatar
Thread Starter
Senior Member
iTrader: (1)
 
Joined: Jul 2005
Posts: 624
Likes: 0
From: SW Michigan
Car: '88 G T/A
Engine: L98
Transmission: 700R4
Axle/Gears: 3.27 9 Bolt
Re: LT1 Throttle Bracket Modification

Klortho... any luck?

SomeGuy... the connection to the TB is the same if youre using the later style thirdgen cable. Its either 89-92 or 90-92. I bought it from the dealer for $27. The earlier style cable like my car had originally has an eyelet at the end and fits over a shaft on the throttle body. The later style is like the LT1 and is a cable that fits over a cam on the throttle body.
Reply
Old Jul 18, 2010 | 03:40 PM
  #7  
Klortho's Avatar
Supreme Member
 
Joined: May 2004
Posts: 2,924
Likes: 1
From: Kingston, Tn
Car: 1987 GTA
Engine: LT1
Transmission: T56
Axle/Gears: 9 bolt 3.70 posi
Re: LT1 Throttle Bracket Modification

Yeah, sorry about the time it took but here are the pics

'95 model throttle bracket, '91-'92 TPI throttle cable.





Attached Thumbnails LT1 Throttle Bracket Modification-img_0040.jpg   LT1 Throttle Bracket Modification-img_0041.jpg   LT1 Throttle Bracket Modification-img_0042.jpg  
Reply
Old Jul 18, 2010 | 03:51 PM
  #8  
MattODoom's Avatar
Thread Starter
Senior Member
iTrader: (1)
 
Joined: Jul 2005
Posts: 624
Likes: 0
From: SW Michigan
Car: '88 G T/A
Engine: L98
Transmission: 700R4
Axle/Gears: 3.27 9 Bolt
Re: LT1 Throttle Bracket Modification

Thanks for the pictures Klortho. Do you ever have problems with it sliding sideways on the bracket? I doubt that would be an issue.

I think my '93 bracket is a little different but I should be able to modify it similarly.
Reply
Old Jul 18, 2010 | 05:19 PM
  #9  
Pocket's Avatar
Supreme Member
20 Year Member
iTrader: (24)
 
Joined: Jun 2005
Posts: 8,117
Likes: 361
From: NC
Car: 91 Trans Am
Re: LT1 Throttle Bracket Modification

The 93 bracket needs to be filed too
Reply
Old Jul 18, 2010 | 05:39 PM
  #10  
SomeGuy25thZ's Avatar
Senior Member
 
Joined: Sep 2007
Posts: 599
Likes: 1
From: Long Island, NY
Car: 1992 z28
Engine: 383 LT1 in the works
Transmission: T-56 in the works
Axle/Gears: 3.73 in the works
Re: LT1 Throttle Bracket Modification

Ok, so If i get the bracket assembly from the intake from an LT1 and use a 90-92 throttle cable I am good to go?

What about using some other universal throttle cable?

Dont have any junk yards near me to get used parts so most of everything i get is new or from dealer.
Reply
Old Jul 19, 2010 | 06:12 AM
  #11  
Klortho's Avatar
Supreme Member
 
Joined: May 2004
Posts: 2,924
Likes: 1
From: Kingston, Tn
Car: 1987 GTA
Engine: LT1
Transmission: T56
Axle/Gears: 9 bolt 3.70 posi
Re: LT1 Throttle Bracket Modification

IIRC I went to the dealer and asked for a '91 Z28 throttle cable. As for sliding sideways, no but I do have the cover on it as well so it isn't going anywhere.
Reply
Old Jul 19, 2010 | 07:53 AM
  #12  
SomeGuy25thZ's Avatar
Senior Member
 
Joined: Sep 2007
Posts: 599
Likes: 1
From: Long Island, NY
Car: 1992 z28
Engine: 383 LT1 in the works
Transmission: T-56 in the works
Axle/Gears: 3.73 in the works
Re: LT1 Throttle Bracket Modification

Ok i ordered a throttle cable from GM and an LT1 throttle cable bracket. lets see how this goes when it all comes in.

I'll post up pics to try and clearly show what needs to be done as well for others.
Reply
Old Jul 27, 2010 | 11:51 AM
  #13  
SomeGuy25thZ's Avatar
Senior Member
 
Joined: Sep 2007
Posts: 599
Likes: 1
From: Long Island, NY
Car: 1992 z28
Engine: 383 LT1 in the works
Transmission: T-56 in the works
Axle/Gears: 3.73 in the works
Re: LT1 Throttle Bracket Modification

how long is the thirdgen throttle cable? I just ordered a new GM throttle cable for 87-92 and the cable looks like it cant even reach the pedal. gonna try and run it tomorrow and make sure.

Klortho - what cover are you talking about to keep the cable from sliding off? Im thinking of just making two tiny holes to rig up a safety wire to keep it from wanting to slide out.
Reply
Old Jul 27, 2010 | 12:00 PM
  #14  
Klortho's Avatar
Supreme Member
 
Joined: May 2004
Posts: 2,924
Likes: 1
From: Kingston, Tn
Car: 1987 GTA
Engine: LT1
Transmission: T56
Axle/Gears: 9 bolt 3.70 posi
Re: LT1 Throttle Bracket Modification

'87 cable will be different, it has to be from a '90-'92. I specifically said '92 Z28 (ordered it from a chevy dealer) for mine. I had a cover on my LT1 that hides where the cable hooks onto the TB shown here

Name:  motor1.jpg
Views: 796
Size:  117.2 KB
Reply
Old Dec 18, 2010 | 05:12 PM
  #15  
GMan 3MT's Avatar
Senior Member
20 Year Member
iTrader: (4)
 
Joined: Apr 2004
Posts: 556
Likes: 1
From: Houston, TX
Car: 1986 Z28
Engine: LT1
Transmission: T5 WC
Axle/Gears: 3.42 T2R
Re: LT1 Throttle Bracket Modification

Here's a picture from a '97 LT1 (92 TPI cable, 97 LT1 cable, 97 LT1 bracket). I'm guessing I'll have a bit more filing to the bracket to make it work?



I couldn't figure out the 'nub' that everyone kept talking about that needed to be ground down. I guess (at least) the '97 bracket is slightly different.
Reply
Old Dec 20, 2010 | 11:00 AM
  #16  
Firebat's Avatar
Supreme Member
iTrader: (7)
 
Joined: May 2005
Posts: 3,786
Likes: 3
Re: LT1 Throttle Bracket Modification

There are sometimes different ways to do things.

I didn't modify the bracket when installing my TPI cable. I modified the TPI cable instead by removing just a little bit of the plastic tab of the cable with some wire cutter pliers.
Reply
Old Dec 22, 2010 | 04:27 PM
  #17  
GMan 3MT's Avatar
Senior Member
20 Year Member
iTrader: (4)
 
Joined: Apr 2004
Posts: 556
Likes: 1
From: Houston, TX
Car: 1986 Z28
Engine: LT1
Transmission: T5 WC
Axle/Gears: 3.42 T2R
Re: LT1 Throttle Bracket Modification

Yeah, I feel pretty dumb now.

Took another look at it to see about modifying the cable itself. I didn't even cut off the tangs, just pried them up.



thanks!
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
evilstuie
Tech / General Engine
22
Jan 9, 2020 08:29 PM
midge54
LTX and LSX
21
Dec 27, 2019 04:14 PM
Genopsyde
Engine/Drivetrain/Suspension Parts for Sale
2
Nov 11, 2015 10:46 PM
angel2794
Engine Swap
11
Sep 8, 2015 06:22 PM
sreZ28
Engine Swap
4
Aug 14, 2015 07:48 PM




All times are GMT -5. The time now is 01:39 AM.