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LSx Swap LSx Engines in Non-LSx Vehicles

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post #46 of 102 (permalink) Old Mar 28th, 16, 03:14 PM
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Re: Help

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Originally Posted by frog7151 View Post
John you seem to have more LS swap experience than most anyone on here, so do you have any header install tips? Install from the bottom, jack the driver side motor up, put the headers in the engine bay then the motor?

I put the car on a lift and tried to install from the bottom but could not get past the PS box. Slide the motor all the forward, mid and all the way back. I didn't have enough time to jack the motor up or pull it out. Thanks in advance for any help.
The drivers side header is best installed when you install the engine. With that said i did not follow the Hooker instructions and installed the engine with out header. I was able to take the motor mount bolt out jack the engine to the passenger side and install the header.....but it was still a little difficult! I have a car lift and still had a bear of a time but it is do able. As stated in a previous post i have an lq9 bottom end with an ls3 top end in my car and utilized the whole Hooker set up and couldn't be more happier

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post #47 of 102 (permalink) Old Apr 24th, 17, 08:35 AM Thread Starter
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Re: Help

I know this is an old thread but I am still having some issues with header fitment.

I used Hooker 2276-1HKR headers and Dirty Dingo mounts. The headers clear the steering box fine but I am having trouble with the exhaust hitting the crossmember. The headers fit nice and snug but the cut outs in the crossmember do line up with the exhaust. I am using the crossmember supplied by Silver Sport. Any help would be appreciated.
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post #48 of 102 (permalink) Old Apr 24th, 17, 10:39 AM
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Re: Help

Probably not what you want to hear but I can tell you that if you use all of Holley's parts everything will fit perfectly. It's tough when you are talking about 3 components and 3 different vendors working properly together on a setup that was never intended for your car.
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post #49 of 102 (permalink) Old Apr 24th, 17, 05:37 PM Thread Starter
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Originally Posted by gphusker View Post
Probably not what you want to hear but I can tell you that if you use all of Holley's parts everything will fit perfectly. It's tough when you are talking about 3 components and 3 different vendors working properly together on a setup that was never intended for your car.
I am pretty sure in order for the Holley parts to fit "perfect" you have to be using a T56. I am using a TKO 600. I have the Holley mounts but I have the same issue with the crossmemer plus I have to modify the shifter hole.
Thanks
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post #50 of 102 (permalink) Old Apr 25th, 17, 04:35 AM
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Re: Help

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Originally Posted by frog7151 View Post
I am pretty sure in order for the Holley parts to fit "perfect" you have to be using a T56. I am using a TKO 600. I have the Holley mounts but I have the same issue with the crossmemer plus I have to modify the shifter hole.
Thanks

True, but he was specifically referring to his headers hitting his cross member. What transmission you have it will have no effect on that.

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post #51 of 102 (permalink) Old Apr 25th, 17, 05:04 AM Thread Starter
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Re: Help

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Originally Posted by gphusker View Post
True, but he was specifically referring to his headers hitting his cross member. What transmission you have it will have no effect on that.
Greg,
Not try to start an argument, but the transmission type determines the crossmember being used. The Holley kit was designed to be used with their T-56 crossmember. I installed the motor using the Holley mounts and it actually made the issue with the exhaust hitting the TKO 600 crossmember worse because the Holley mounts position the engine lower and thus causing the headers to be higher/closer to the floor plans.

It looks like I am going to have to modify the crossmember or find one with the exhaust cuts outs closer to the subframe.

Thanks
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post #52 of 102 (permalink) Old Apr 25th, 17, 06:11 AM
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Re: Help

Just this past Sunday I dropped an LS3 in A 67 with Hookers. And DD Sliders.

Put the headers in from the bottom. Took about 10 minutes. The collectors line up and are in good position relative to the crossmember. The crossmember looks to be from either Hurst or Kiesler.

Cross was installed previously with a SBC and TKO600. The transmission choice has nothing to do with the raised area of the crossmember to allow for the exhaust. The only differences are how the cross is configured to locate the height of the tranny mount based on the transmission being used.

I just finished Steve's 68 with Holley mounts and a Hurst crossmember. He has a TKO600 and a Hurst cross. No problem.

Your issue may be your tranny mount is pushing the rear of the tranny too high causing the headers to hit the crossmember

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post #53 of 102 (permalink) Old Apr 25th, 17, 09:37 AM Thread Starter
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Quote:
Originally Posted by Vega$69 View Post
Just this past Sunday I dropped an LS3 in A 67 with Hookers. And DD Sliders.

Put the headers in from the bottom. Took about 10 minutes. The collectors line up and are in good position relative to the crossmember. The crossmember looks to be from either Hurst or Kiesler.

Cross was installed previously with a SBC and TKO600. The transmission choice has nothing to do with the raised area of the crossmember to allow for the exhaust. The only differences are how the cross is configured to locate the height of the tranny mount based on the transmission being used.

I just finished Steve's 68 with Holley mounts and a Hurst crossmember. He has a TKO600 and a Hurst cross. No problem.

Your issue may be your tranny mount is pushing the rear of the tranny too high causing the headers to hit the crossmember
I am not sure what the issue is. I am using the crossmember and trans mount supplied by Silversport.

The headers are close to the subframe and do not line up with the cutouts in the crossmember.
Thanks
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post #54 of 102 (permalink) Old Apr 25th, 17, 04:16 PM
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Re: Help

Oh man, I will be using the Holley mounts with the Silversport trans X member as well as a TKO 600 too. I'm not that far along in the swap yet. Hmmmm.

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post #55 of 102 (permalink) Old Apr 25th, 17, 05:25 PM
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Re: Help

Here are pictures of Rob's 67 that we dropped the LS3/480 into Sunday.

Dirty Dingo Sliders with the engine in the stock position. Small block frame towers. Shifter comes up in original console and no change to driveshaft.

Headers are Hookers 2288 1HKR. I see you're using 2276 which are 1 7/8 tube. I have a set in the garage and it appears the collector should be in the same location as the 2288

The 2276 HKR are on the LS3 on the Engine Stand

Header Collectors are 21" Center to Center and 2" below floor pan
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Last edited by Vega$69; Apr 25th, 17 at 05:58 PM.
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post #56 of 102 (permalink) Old Apr 25th, 17, 05:41 PM
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Re: Help

Quote:
Originally Posted by frog7151 View Post
Greg,
Not try to start an argument, but the transmission type determines the crossmember being used. The Holley kit was designed to be used with their T-56 crossmember. I installed the motor using the Holley mounts and it actually made the issue with the exhaust hitting the TKO 600 crossmember worse because the Holley mounts position the engine lower and thus causing the headers to be higher/closer to the floor plans.

It looks like I am going to have to modify the crossmember or find one with the exhaust cuts outs closer to the subframe.

Thanks
Shawn, please help me on this one, If the Holley mounts lower the engine, wouldn't the headers be lower as well ????
Here is my SilverSport X member:
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post #57 of 102 (permalink) Old Apr 25th, 17, 06:08 PM
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Re: Help

Quote:
Originally Posted by DT View Post
Shawn, please help me on this one, If the Holley mounts lower the engine, wouldn't the headers be lower as well ????
Here is my SilverSport X member:
The Holley Motor Mounts and the clamshells lowers the front of the engine compared to other mounts that use the SBC frame towers.

If you lower the front and do not also lower the tranny mount by the same distance the header collectors will be angled slightly up and therefore closer to the floor pan, which in turn will put them too high relative to the raised area of the crossmember.

I believe the Holley Crossmember does just that.

If so you have a number of options

#1 Possible find a thinner tranny mount
#2 Modify you crossmember to lower the tranny
#3 Buy the Holley crossmember (the kit is set up for T56 don't know if they have one for TKO600)
# Use different swap mounts that utilize the SBC frame towers
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post #58 of 102 (permalink) Old Apr 25th, 17, 06:18 PM
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Re: Help

Quote:
Originally Posted by DT View Post
Shawn, please help me on this one, If the Holley mounts lower the engine, wouldn't the headers be lower as well ????
Here is my SilverSport X member:
Yes the engine will be lower in the front but with your cross the headers will end up higher in the back
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post #59 of 102 (permalink) Old Apr 26th, 17, 07:06 AM Thread Starter
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Re: Help

Quote:
Originally Posted by Vega$69 View Post
Here are pictures of Rob's 67 that we dropped the LS3/480 into Sunday.

Dirty Dingo Sliders with the engine in the stock position. Small block frame towers. Shifter comes up in original console and no change to driveshaft.

Headers are Hookers 2288 1HKR. I see you're using 2276 which are 1 7/8 tube. I have a set in the garage and it appears the collector should be in the same location as the 2288

The 2276 HKR are on the LS3 on the Engine Stand

Header Collectors are 21" Center to Center and 2" below floor pan
John,
Thanks for the pictures and measurements. My collectors are approximately 23" center to center and 1 1/2 " below the floor pan. I don't understand why the difference. I used the 307 stands and DD sliders and I just simply bolted the headers on with supplied gasket and bolts. I guess I will have to try and find a shorter trans mount or modify the crossmember. Thanks again.
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post #60 of 102 (permalink) Old Apr 26th, 17, 07:09 AM Thread Starter
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Re: Help

Quote:
Originally Posted by DT View Post
Shawn, please help me on this one, If the Holley mounts lower the engine, wouldn't the headers be lower as well ????
Here is my SilverSport X member:
Danny that is the same crossmember I am using. For me the cutouts need to be closer to the subframe. My collectors are approximately 1 1/2" from the subframe.
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