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Unread 11-06-2009, 10:11 AM
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Fair! Fair! is offline
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Join Date: Jul 2004
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Default Re: Vorshlag $2010 GRM Challenge car - BMW E30 V8

Project Update #2: The first Team Meeting last night went great (5 of the 7 initial team members were able to make it) and we fleshed out a good plan for the entire project. Costas and others on the team talked me out of even more "crazy" (like Lexan, custom intake/throttle bodies, E36 5-lug spindles swap, and some other unnecessary mods I had talked about early) and its going to be a very reasonable, and much more believable build now. We're aiming for an honest-no-bullsheet! street car, which should still be a very capable track, auto-x or drag strip terror, and hopefully much easier on the eyes and engineering brain than some other low cost swaps out there.

The guys did the gearing and tire height calculations and we settled on a final drive ratio (3.23), tire (275/35/15 Hoosier), wheels (lightweight steel 15x10"), and transmission (T5). Came up with a motor plan, suspension plan, autocross test plan, aero plan, and agreed upon the flares and some other subtle body mods. We're are also keeping the full interior, fully functional doors, and all OEM windows. Why not do all the weight savings possible? Well, for one, this car's interior is too nice, and for two, the damn thing is already lighter than we had expected.

Here's the first bit of useful tech for the project - the starting weight:



This 2436 pound weight is with everything stock, at full weight, A/C installed, full interior, heavy stock exhaust, etc. Well, it does have a lighter than stock battery, and the radio is missing, but that's it. Big cast iron straight six isn't super light, and we've got several weight savings mods in the works, so we think we'll meet or exceed our target weight even with the interior and glass.

Next, after two weeks of hounding him via phone and email, I finally got a local guy selling a complete VH45 motor on CraigsList to meet us this afternoon. Got lucky again, and it was only 15 minutes from Dave's house. We rolled up, unloaded the engine hoist, grabbed the motor and the wheelbarrow full of parts (which included all of the accessories, ECM, full harness, and everything he had partially disassembled), paid the guy $60 cash, and off we went! He said he only paid $90 for the entire package from a local "U-Pull-It" discount salvage yard, so he didn't lose much money when he canceled his VH45 + 240SX swap.




L: VH45 longblock + alt + intake was 430 pounds (not bad). R: Complete motor + accessories was 514 lbs (sprockets, covers, balancer, and accessories were heavy!)


L: Exhaust manifold was a bit portly. R: Entire engine is 28" wide, but I think we can trim that considerably by relocating the oil filter.

Worst case - this motor has some terminal flaw, or ends up being too big to fit this chassis, and its only used for mock-up purposes. At $60 it was well worth it, and the harness and ECM are a big bonus if we end up going the VH45 route. Next week we're focusing on weighing several other major components from the car and getting the old motor running. Then we'll yank the stock drivetrain (to sell it) and mock-up the VH45 for the first time...

More soon.

Last edited by Fair!; 11-06-2009 at 04:19 PM.
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