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LSA/Grand National Conversion

 
Old 06-29-2014, 11:25 PM
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Default LSA/Grand National Conversion

Finally getting my wish to have an LSA in my GN.
Went through the suspension, brakes and reinforcing the frame with a notch before undertaking this conversion.
Lonnie Diers Stage III 4L80E Transmission with custom cut Billet 1st and 2nd gears 2.75 1st, 1.57 2nd.
Cooling system is already converted to a Ron Davis radiator so cooling should not be an issue.
Was running my stroked 4.1 on E85 and hoping to have this running on E85.
Nick Micale is doing the install with his vintage air conversion for more engine bay room.
After in and running a turbo (or twin) is(are) going in front of the supercharger to turn up the volume a little.
Total project should be around 2 months.
Here is this weeks progress:
Frame notch for Lower A/C mount underway.

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Last edited by tdishon; 07-13-2014 at 10:29 PM.
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Old 06-30-2014, 08:08 AM
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Nice....Are those 4th Gen F-body engine mounts on the engine with custom frame stands?

Andrew
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Old 06-30-2014, 08:20 AM
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Very cool! I'll be watching this! I have a dream of doing this swap someday.
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Old 06-30-2014, 10:28 AM
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Yes, I went to Spohn for the mounts. I bought two sets. 1 welded and the other unwelded. I have heard about alignment issues, but they went in smooth.
Just have to modify my crossmember for the 4L80E.
Plenty of room for the conversion.
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Old 06-30-2014, 01:01 PM
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Nice start, how about more pics of the car? And maybe some pics of the work you mentioned?

thanks.
Jim
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Old 06-30-2014, 01:11 PM
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Here are some more pics of the car. I have had it for just over a year and now have 5k miles on it. Bought it from a collector with 4,200 miles. Just wanted a super clean foundation. Here are the GNX vent brackets I fabbed up so they are removable. They are functional too.
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Old 06-30-2014, 01:27 PM
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Underside after I Installed Baer brakes and Detroit Speed
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Updated buckets out of a Scion.
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I wish I had better pics. I will as soon as we get it out of the shop.
Here is when it was delivered.
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Old 06-30-2014, 01:36 PM
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LSA delivered.
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Old 06-30-2014, 01:36 PM
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Some of the body support:

Then dynomat covered
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Old 06-30-2014, 01:39 PM
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Wheel wells cut out for frame notch
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Old 06-30-2014, 03:46 PM
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This project is relevant to my interests. Beautiful start!
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Old 06-30-2014, 04:02 PM
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Thank you sir.
I'll keep posting as progress occurs and list any surprises and/or hurdles.
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Old 06-30-2014, 05:04 PM
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How far did you notch the frame to the seam? What size wheel/tire you planning? I notched my GN to the seam but have not touched the wells yet didn't know if i need to to slip 315's in there some say yes most say no just massage the wells some.
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Old 06-30-2014, 06:16 PM
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Well it depends on the tire brand. I have Mickey Thompson 315/35-17 currently and they fit and are big 315's, but recommend rolling the fenders. Plenty of room between my tire and frame. I fit the rear wheels off my corvette 325/30-19. They did fit and drive nice with the correct backspacing.
I did the notch to the seam. I'm probably moving to the Nitto tires that run small.The 335/30/18 Nitto should not be any larger than the Bridgestone 325/30/19 I already had on the car. The pic below is of the 325/30-19. If the Nitto on my 18x11 wheels with 5-3/8 backspacing do not fit, I will go to the Mickey Thompson 305/35-18. When the car is on the ground, they fit just inside the rolled lips and don't touch.
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Old 06-30-2014, 07:30 PM
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What a great project. I can't wait to see a startup video.
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Old 06-30-2014, 10:54 PM
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Well that's promising I cut my lips in half! Once i finish my rear setup I can use the wheel rite and measure everything up and start ordering! Nice build reminds me of mine lots of money for sure!
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Old 07-03-2014, 06:24 PM
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Update: Frame notched, A/C and engine are in.
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Old 07-03-2014, 06:59 PM
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Did you reuse the factory rear wells and just section them? Did you keep them even with the notch?
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Old 07-03-2014, 07:53 PM
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Great project!
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Old 07-03-2014, 08:24 PM
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I kept the rear wheel wells and added a strip of metal to offset it. I did keep it even with the notch and wish I set it in another inch. While figuring offset with wheel adaptors and the car lowered 2+", the wheels sat up in the wheel wells and would rub the inner upper wells on curbs, etc. I changed the springs to raise it about 1/2" and now have the top of the tires just below the lip and I have not ever rubbed anything since.
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