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.

ls1 swap eng mount advice

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Old May 5, 2009 | 07:17 AM
  #1  
ml258-89iroc's Avatar
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From: Kenmore NY
Car: 1989 iroc
Engine: 350
Transmission: 700r4
Axle/Gears: 2.77
ls1 swap eng mount advice

getting ready to order some lsx swap eng. mount and trans cross member for ls1 and 4l60e swap. which brand do you that have the swap recommend? thanks

Last edited by ml258-89iroc; May 7, 2009 at 10:10 AM.
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Old May 5, 2009 | 07:22 AM
  #2  
andrew69_04's Avatar
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From: NE & KS
Car: 92 Camaro RS
Engine: LS1
Transmission: T56
Axle/Gears: 3.42
Re: ls1 swap eng mount advise

i did a t56 swap, but i used the frame mounts i picked up from Hawks, and used them with poly mounts on the block and a skulte x-member. worked well. motor/frame mounts should work fine for your swap.
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Old May 7, 2009 | 07:57 AM
  #3  
ghettocruiser's Avatar
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From: PA
Car: 86 Trans AM
Engine: LS1 (not stock...)
Transmission: Built T56
Axle/Gears: Strange 12-bolt w/ 3.73
Re: ls1 swap eng mount advise

The "brand" that I recommend is Spohn. You can buy them at Hawks....or direct from Spohn. Either way, they'll work.

Be prepared to have tight clearance between the oil pan sump and k-member...unless Steve started building the mounts alittle different. I ended up pulling my k-member back out and cutting and welding a notch in place for the pan. No big deal if you've got the car apart.

J.
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Old May 7, 2009 | 10:09 AM
  #4  
ml258-89iroc's Avatar
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From: Kenmore NY
Car: 1989 iroc
Engine: 350
Transmission: 700r4
Axle/Gears: 2.77
Re: ls1 swap eng mount advise

thats was what i was curious about. if somebody makes them for better clearance and if there is a difference
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Old May 11, 2009 | 07:34 PM
  #5  
1987earthquake's Avatar
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From: Hattiesburg, MS
Car: 1987 Camaro Z28
Engine: 5.3L
Transmission: 4L60E
Axle/Gears: 3.42LSD
Re: ls1 swap eng mount advise

I used 1" setback adaptor plates. didn't even have to take my mounts out the car which was good for me since I had just put new ones in. didn't have to notch for oil pan or nothing. only thing is the stock ac compressor won't work like this. I just created a thread about a mount for the sanden ac compressor that will put it in the same place as the stock without even having to notch the k-member. check it out.
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Old Aug 19, 2009 | 04:25 PM
  #6  
candy burple rs's Avatar
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From: hollywood maryland (st. mary's county)
Car: 87coupe,91RS Camaro's, 00 Suburban
Engine: LSX427HO w/D-1SC and intercooler
Transmission: RPM Tremec T-56 Magnum
Axle/Gears: DTS 12bolt, 3.42
Re: ls1 swap eng mount advice

Well that all sounds good but has anybody put..the LSX in the 3rd gen. using a K-member from BMR that was made for a small/big block appli. Thats what I have and dude a BMR said that a LS1 bracket should work with the K-member..any ideas or where to look!!!tks
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Old Aug 19, 2009 | 07:21 PM
  #7  
Pocket's Avatar
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From: NC
Car: 91 Trans Am
Re: ls1 swap eng mount advice

A tub K member with SB/BB mounts acts just like a factory K member, so you will need the swap mounts(bolt on) to drop your LS1 in
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Old Aug 26, 2009 | 09:36 PM
  #8  
Cg-OneSic89's Avatar
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From: San Antonio
Car: 1984 Z28 L69
Engine: Cammed 350
Transmission: Tremec Tr-3550
Axle/Gears: 3.42
Re: ls1 swap eng mount advice

Im going with a Brp Hotrods Kit, albeit a bit pricey they pick then engine up a little more then the hawks kit and sit it slightly back. They claim itll clear the ac compressor from a Fbody setup. It also frees up enough room to run brps headers that run from 1 3/4 to 2in primarys. Most of this info is on the site, the only thing i am concerned with is the quality of the trans crossmember. It looks a bit weak in the picture and i have yet to call and ask if the will warranty it behind a strong 11 second daily motor.

Good luck with your swap, hope this helped.
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Old Aug 27, 2009 | 09:27 AM
  #9  
BlueZee28's Avatar
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From: O'Fallon, MO
Car: 1991 Z28 convertible built 3/1/1990
Engine: Cammed 6.0L LSX
Transmission: T56
Axle/Gears: custom Ford 8.8", 4.10 gears
Re: ls1 swap eng mount advice

If you want lots of clearance, get the Spohn tubular k-member. I have a group purchase going on with Hawks for $50 off. We need I think two more people!
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Old Aug 28, 2009 | 05:55 AM
  #10  
ls6iroc's Avatar
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From: Buffalo NY
Car: 89 iroc
Engine: ls6
Transmission: 4l60e
Re: ls1 swap eng mount advice

blue zee,
thanks but i already bought the spohn mounts and i am finally dropping my engine in this weekend.
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Old Aug 29, 2009 | 04:07 PM
  #11  
92tracker's Avatar
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Joined: Apr 2009
Posts: 58
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From: Ontario, Canada
Car: 92 firebird formula
Engine: 2002 LS1/6 350 rwhp
Transmission: 4L60e
Axle/Gears: 342
Re: ls1 swap eng mount advice

do your self a favor put about a quarter inch of shim in the bottom half of the mounts to raise it up slightly this will help when it comes time to install the A/C comp if you plan on putting one on. The trany mount I ended up making a modified vertion of this with 1.5 inch tubing and angle mostly for clearance so the exhaust could run through easier.
Good luck on your swap
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