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Dean's Tweety-Bird


 

db z3 fullbody_1

 

This car started out the same way many projects do, with a simple problem. Dean noticed that his car had worn thrust bearings and a large amount of movement in the crank and came to us for the fix. 
Once we got ahold of the engine, we dismantled it and found that the crank was trashed, and it took plenty of other parts with it. The problem was easily solved, though. We knew the engine needed to be supercharged from the get go because he already had a Rotrex based kit installed. So, we helped him pick out a crank that fit the application. He decided on our 3.5l 97mm stroke S50 crank (OBD1) as a replacement. We also added an ATI OBD1 High Performance Crank Damper to avoid bearing issues in the build. In our experience, the Rotrex based kits don't make a lot of top end boost. Dean decided to upgrade to a custom RMS blower kit with a V3si trim blower to make some larger numbers. 
We replaced the pistons with a JE set, uprgraded to our custom SP rods, and added VAC Coated Rod and Main Bearings. It's held together by a full ARP hardware kit. We also added a VAC Oil Pump Upgrade Kit, and an Oil Pan Baffle to insure better longevity.

 

db z3 engine

 

The head is our mild stage 2 head, and is outfitted with a stage one supercharger camshaft set by Schrick. We reused the metal Schrick manifold that was already on the car to top off the engine for boost.

 

db z3 schrick

 

The exhaust starts off with an Active Autowerkes supercharger header, which collects into a single stainless 3” custom exhaust that splits into two oval tailpipes.

 

db z3 rear

 

Spark is handled by a set of Okada coils.

In order to really increase the performance, we also upgraded the clutch to a Clutch Masters FX300. It's a sintered kevlar clutch that feels like stock, but handles roughly 110% more torque than stock. 

The rear end was beefed up with an OS Giken LSD and geared up to a 3.15 ring and pinion (stock was a 3.46). Dean already had a dual ear E36 Rouge Finned Differential Cover and a full Strong strut Subframe Reinforcement Kit installed on the car. While we dismantled and reinstalled the rear we also installed our Toe and Camber Kit to the rear end. The suspension was topped off with TC Klein’s Double Adjustable Coilover Kit with custom spring rates.

We didn't need to do any work near the wheels because he already had an upgraded StopTech Front Big Brake Kit and braided brake lines.

 

db z3 brakes

 

When we tuned it on our all-wheel drive Mustang dyno, the car saw just over 400WHP. You may not expect it, but the car still drives with the ease of a stock car.