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#1074279 07/06/22 12:22 AM
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I ordered a new LS7 570 HP engine for the car today after waiting for months for inventory. I also have a complete speed tech suspension with coil overs, AFX spindles, and C 6 brakes. Along with tons of other parts that have been shelved for nearly two decades which include many new GM interior and many other NOS parts. The plan will be to build a stock appearing car with some heavy modifications that just better the car all the way around. Framework, suspension, engine, trans, body and paint. All the factory stripes will be reapplied in paint with candy colors.

I will post pics of the car after the LS3 was pulled, Frame, parts and engine soon.


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Originally Posted by 1 Slow SS
I ordered a new LS7 570 HP engine for the car today after waiting for months for inventory. I also have a complete speed tech suspension with coil overs, AFX spindles, and C 6 brakes. Along with tons of other parts that have been shelved for nearly two decades which include many new GM interior and many other NOS parts. The plan will be to build a stock appearing car with some heavy modifications that just better the car all the way around. Framework, suspension, engine, trans, body and paint. All the factory stripes will be reapplied in paint with candy colors.

I will post pics of the car after the LS3 was pulled, Frame, parts and engine soon.


My experience has been that in an autox/track situation the LS3 makes more torque than I could ever use, why the LS7 choice?


86 SS 6.2l LS3, Ilmor intake, Summit Stage 4 Cam, Stainless long tube headers, Stainless 3in exhaust, Tremec T-56 Magnum 6 speed, Eaton Truetrac 8.8 LSD, UMI Cornermax Front Suspension, 3-link Rear suspension w/ UMI Control Arms, UMI Front & Rear Braces, Brembo Brakes
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My choice was based on what I wanted, a build that is more unique. LS3 engines are great and make great power, but they are too common. For that matter I could have done a 416 and made more power but I really wanted those tri Y Z28 exhaust manifolds on the LS7 and a bunch of other goodies.


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Is this for the same white car you did all the frame, body work and paint on years ago Ron?


Lance
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Yes Lance that’s the car, so yes I’m starting on a very nice roller.


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So all the hard work is already done then, just fun stuff now. laugh


Lance
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Not sure which car or cars you remember? I have had four white SS cars all with frame work, only one with a LS3 around 2010. This car is nice but I need to build a frame for it, paint and assemble everything as it will be torn down.


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Couple links on the engine.

https://www.chevrolet.com/performance-parts/crate-engines/ls/ls427-570

https://www.motortrend.com/news/ls7-engine-discontinued/

The build is on, I have been hording parts for years for this car!


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Originally Posted by 1 Slow SS
Couple links on the engine.

https://www.chevrolet.com/performance-parts/crate-engines/ls/ls427-570

https://www.motortrend.com/news/ls7-engine-discontinued/

The build is on, I have been hording parts for years for this car!


I know the desire for a unique engine. my buddy got me two sets of the Dart Pro1 12 degree LS7 NASCAR truck series cylinder heads and the corresponding 2 piece intake. Which is great, but now I have to build a 4.185 inch bore Dart LS Next aluminum block lol.


86 SS 6.2l LS3, Ilmor intake, Summit Stage 4 Cam, Stainless long tube headers, Stainless 3in exhaust, Tremec T-56 Magnum 6 speed, Eaton Truetrac 8.8 LSD, UMI Cornermax Front Suspension, 3-link Rear suspension w/ UMI Control Arms, UMI Front & Rear Braces, Brembo Brakes
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Originally Posted by 1 Slow SS
Not sure which car or cars you remember? I have had four white SS cars all with frame work, only one with a LS3 around 2010. This car is nice but I need to build a frame for it, paint and assemble everything as it will be torn down.



I remember what I think was the first one you posted the project on here, a real nice white one that was mostly OEM, think it was a low mile car also.

Then I remember one that was nice but the frame was really rough...but it had sentimental value of some sort?

It's hell getting old... laugh


Lance
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Can't wait to see what you come up with!

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This one would be the "really rough frame", sentimental of some sort.


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Last edited by 1 Slow SS; 07/12/22 12:52 AM.

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Originally Posted by Travis Jones
[quote=1 Slow SS] Couple links on the engine

I know the desire for a unique engine. my buddy got me two sets of the Dart Pro1 12 degree LS7 NASCAR truck series cylinder heads and the corresponding 2 piece intake. Which is great, but now I have to build a 4.185 inch bore Dart LS Next aluminum block lol.


That will be a serious build and should be very unique, I'll look forward to following that thread.


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I was cleaning out my basement and found the T56 magnum, clutch, and other parts for the car. I love these 3 inch tail pipes that are one off, I'll always do my best to make these builds as close to factory looking as possible while paying close attention to detail.

[img]https://hosting.photobucket.co...=960&height=720&fit=bounds[/img]

[img]https://hosting.photobucket.co...=960&height=720&fit=bounds[/img]

[img]https://hosting.photobucket.co...=960&height=720&fit=bounds[/img]

[img]https://hosting.photobucket.co...=960&height=720&fit=bounds[/img]


Last edited by 1 Slow SS; 08/18/22 01:47 AM.

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Looks good!

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Found this today for the frame, I hope it makes a difference??

[img]https://hosting.photobucket.co...=960&height=720&fit=bounds[/img]


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Is that the hellwig kit?

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Yes it is, I had bought this a few years ago when I started hoarding suspension parts from speedtech.


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Hi 1 Slow - it's hard to tell from that box how all that integrates with the frame. Does it make the open side C-channels into closed tubes?

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Hello MAP,

That's just a FX frame box kit for the center section, Unfortunately I will have to open the front and rear sections of the factory frame rails and weld in the tube front to back. The FX box kit will cover the long tubes running down each side throughout the center section.

The intent of this modification will be to run a more road compliant front sway bar and a bit softer front suspension while retaining good handling. I see too much distortion in body gaps and the front facia covers of these cars from too much front frame rail flex while wheeling them around cones, IMO. I want to reduce that attribute, if need be I might scrap the GM frame when I get into it and build a complete new frame with elastic modulus of say 205 GPa 29700 ksi.

I have built many cars over thirty plus years for customers and myself, if done right I might have something worth looking at? Will it be so involved as the projects others like Bob take on, no. I'm going to build a whole car in a year completely redoing everything I did 12 years ago. So I can't dwell on one project for months, going to school, designing, and fabricating. If I rebuild a frame or build a frame my time line is a few weeks, perfect or not we will see if it's worth anything over stock quality?? I do plan to run a rack and pinion steering. But again this will just be glued together, or just bolting parts together with little to no thought and it will work very good, experience sometimes makes things more transparent. I would like to build a car others can replicate with off the shelf parts, and not such a deep knowledge of G body's and engineering principles. And no three link unfortunately, I'm keeping the exhaust tail pipes I made with my father before loosing him.



Regards,
Ron

Last edited by 1 Slow SS; 08/25/22 05:06 PM.

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Hi 1 Slow,

OK - if that kit turns the open C-channel into a closed box, then you will see a big improvement in torsional rigidity. No matter how I read what you're saying, I can't see anything but very good results coming. And the car needs all the help it can get! But are you saying you're adding a tube inside of this box? (200-ish GPa: yup, steel. Btw, I didn't know this about your background - how interesting!)

Best,
MAP

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Hi Mark,

Yes, I will section the frame running one piece of steel tube inside each frame rail end to end replacing the original structure after. The engine will be moved back as fare as possible. With the lighter relocated engine, rack, and heavy 12 bolt out back she might be a bit better balanced with a full belly?

I was engineer for a major OEM for many years, I always like asking questions about things I know the answers to for some reason? dunno In fact my grandfather Harley was a GM engineer that was part of the corvette fuel injection development team in the 50's, with several years of carburetor development well into the 60's. I still have his GM tie tack along with many other small items passed to the engineering teams of that time.


Regards,
Ron


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Hi 1 Slow,

What an interesting background! I'll bet you have many stories to tell!

OK, so you're putting a tube inside of a tube. Since tube torsional stiffness goes in direct proportion to its skin thickness and as the cube of its diameter, that inner tube won't help you much unless it's nearly as big as the outer tube. And at that point, you might as well dispense with the inner tube altogether and just put the saved mass into additional skin thickness for the outer tube. Or even better: conserve skin thickness, but strive to make that outer tube as big as can possibly fit into the car. For me, I gladly accepted a 1" reduction in ground clearance directly underneath the factory side rails.

It sounds like you're well on track to move the COM rearwardly, which is another thing the car very much needs. Have fun!

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Well after a day of thinking... frown I'm realizing Mark is right, no matter how I look at it, the frame work will be a cobbled together mess. frown As much as I want to resist buying a killer chassis and build one to prove a point, I won't. I'm contacting Speedtech first and if they will do the frame I'm in, if they won't I will order a new Schwartz chassis near the end of the year. This way I can remove the body selling off all my new parts, modifying the trunk and wheel tubs to fit massive tires, then I have to make the tail pipes work. The new N90 17's will be sent out to be re hooped as 18's and much wider!

The bad news is no IRS as it's over 10K.

Regards,
Ron

Last edited by 1 Slow SS; 08/30/22 02:56 AM.

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