The Rain Is Here

The rain is here and I am finally getting things lined up to work on the 240z again. I've recently gotten motivated after finding a few pictures snapped of my car online.






The immediate projects are as follows:
-Mount Coilovers
-Weld in seat brackets
-Rework front brakes for 12.2" wilwoods

Well I'm back after being unemployed for over a year. I have a shorter term project right now. I picked up a 72 240z that will be getting a stock internals 2JZ at about 700-800whp. The car needs paint badly. The 280z is on hold for now. Probably get cranking away on all the chassis stuff once work slows down. I can bring it in to lazer out a floor pan, form it and weld it in. The 240z is a fun summer project. Doing brakes, suspension, interior and electrical over the summer. From there I'll do a motor swap when funds allow. I still have all of the 2JZ components, with PNT intake manifold, T4 header, G-Force Dogbox, clutch ect. I really just need the fuel system, driveshaft, TOB, turbo and ECU to be able to do the swap.

Compound Turbo Setup and New Rubber

I was trying to get an idea of where I would put the large turbo in my compound arrangement. I think this will be the basic layout. I need to verify that this will all fit with the thermostat housing assembled. The Top turbo is a Borg Warner s300sx3 66mm/91mm compressor & 79mm/73mm turbine with custom 1.10 a/r housing from full-race. On its own is good for ~775whp. The lower turbo is a Borg Warner S400sx4 80mm/110mm compressor & 96mm/88mm turbine w/ 1.32 a/r housing. This turbo is good for about 1175whp currently. I'm looking at 3 or 4 different compressor wheel upgrades. I will likely go with a compressor with the dimensions 88mm/118mm. The goal is to get it to support ~1250-1300whp at a pressure ratio of 2:1.

The whole reason for doing a twin turbo compound configuration is for more area under the curve. The small turbo will spool to ~30psi initially. This added exhaust energy will allow the larger turbo to spool up sooner. It will also only be spooling to 15psi, instead of 45psi. This all equates to a system that will come up on full boost 1500-2000rpm faster then the big turbo would by itself. This will then allow me to not have to rev the engine beyond 7500 rpm, increasing durability. The added benefit is the turbos are each only running at pressure ratios of 2:1. They will barely be breaking a sweat when I'm running 45psi and making 1200+whp :)

The engine is being solid mounted to the tube frame. I do have lots sheet metal to cut away to make room for all of the new piping. The down pipe from the small turbo will feed into the turbine housing of the large turbo. The compressor outlet of the large turbo will feed into the compressor inlet of the small turbo. The compressor outlet of the small turbo will go to the intercooler.











Got Meat?

Rear wheels are on the way. 18X12's with 345/35-18 Mickey Thompson drag radials! These are C6 Z06 replicas as I needed to keep it on a budget. The fronts will be 18X10.5 with 295/30-18's. No CCW's for a while, but eventually I'd like a set.

The wheels and tires that are on this car are the same that I will be running:

Not much progress. Just checking clearances to make sure the floor bars will be low enough to clear the transmission and motor. Its a tight fit. I also found out there are shelf options to move the shifter forward several inches. This along with a forward sweeping shifter should fix all those issues.










This shows the modified shifter mount that I'm going to use. I think I can move the shifter head about an inch further then is shown in these pictures.

True Mid Engine 280Z

I've pushed the 2JZ back 16" to improve overall vehicle dynamics. Benefits include:




Lower PMOI will allow vehicle to rotate more easily.
Increased weight on rear tires will help traction.
Reduced driveshaft length. (weight savings)
Reduced exhaust length. (weight savings)
Fuel Cell up front with very short fuel lines. (weight savings, gravity feed pumps)
Ducting radiator and intercooler airflow over top of car. (improved cooling and aerodynamics)
Rear Diffuser like shown below (improved aero)

Finally Mocked up the 2JZ this afternoon. I need to figure out the driveline angle with this setup. The motor may need to be moved a couple inches higher. The only trouble with this is hood clearance for the turbo and intake manifold. I may have bulges for those two. I'm really pleased with how the new manifolds fit.