FX Holden Race Car Project

[Holden202T]

So while I was waiting on the correct diff mounting plates to arrive I started working on making the front chassis rails, I've got it roughly worked out, needs a few tweaks on the angle for the part where the crossmember mounts, but should be good, and once I get the rear end back on the ground i'll be alble to do a bit more on it ie removing the front end and such.

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So last night the diff plates were waiting for me at the front door! so the front chassis rails got pushed to the side so I could get it all happening

needless to say I'm very excited!

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Next step will be to make some bars to go in place of the coil overs to get the right ride height then put some wheels on and see how it all sits in the guard.

[Holden202T]

Made up some 25mm square tube coil overs to hold the car up so I could get an idea of how it sits, its definitely nice and low, I plan on a slightly larger slick so it will help a bit, but will need to see how it all sits with the engine and such in it and go from there.

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[Charlescrown]

Looking real good. You have lots of room to fit a huge set of slicks in there. I still have some concern about the lateral bar rose joint not being mounted for full vertical movement. I even had a look on their website and it's the same in their sample pic as you have it. I suppose it's all to do with how much vertical movement the suspension will have. Any thoughts on the spring rates for the coil-overs and the shock damper rates? This part becomes a real science sorting it out for best traction under acceleration.

[Charlescrown]

Oh another question is the long wheel studs. Is that a requirement for drag racing or do you plan to use spacers to get the wheels positioned where you want them?

[Holden202T]

I have no idea on the spring rates, I'm hoping that they can suggest where to start with it.... as for the vertical movement, the goal is zero squat or lift on launch so I guess it shouldn't matter too much if its all working properly!

the wheel studs they like to see them past the end of the wheel nut, it just happens that the ARP studs for commodore are that long, I could cut them off, but they aren't far enough out to really be an issue. they are 3 inches long, and the fronts are 2.5, they are only just longer than the wheel nut so I guess its just how it works out!

[VL400]

Looking good, sits nicely at that ride height.

Plenty of room to shorten up the diff and get some big boots under the rear guards!

[Holden202T]

Got stuck into the front chassis rails, they are tack welded in so I could dummy up the front end and see how it all sits!

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I then got it out in the sun so I could sweep out the shed, geez some crap came out of this car!

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[Charlescrown]

So is the theory behind the full chassis to prevent the car from bending or is there other performance advantages? What is the expected end weight?

[vlad01]

Its to stop it twisting in half at the cost of added weight. The FX has a piss weak chassis and body design.

[Holden202T]

Yeah pretty much what vlad said, also alot of the original stuff was rusted, so adding some strength back and will tie the roll cage into these new bits