Improve the performance of your B58 Gen 2 engine with the do88 Performance front-mount heat exchanger!
B58 Engine vs. F80 M3/M4 S55
The B58 engine shares similarities with the S55 engine found in the F80 M3/M4 models, as both engines have a water-to-air intercooler paired with heat exchangers (water radiators) at the front of the car. These radiators cool the water flowing through the intercooler, and the water dissipates heat from the charge air before it enters the engine. The main difference is the design of the B58’s liquid-to-air charge cooler, which is integrated into the intake manifold, while the F80 S55’s radiator is a separate unit mounted on top of the engine.
B58 Charge Air Cooling System Challenges
A common problem with tuned B58 engines is rapid heat absorption in the charge air cooling system, especially during track days. High intake air temperatures will cause the ECU to reduce power output or put the car into limp mode. Even spirited street driving can cause the ECU to alter timing and reduce power output due to high intake temperatures.
Our Solution
It’s clear that this system requires increased cooling capacity to prevent heat buildup. Part of the solution is our do88 Performance front-mount heat exchanger. The do88 Performance front-mount heat exchanger is designed to provide increased cooling capacity while preventing heat absorption. It features:
80% larger core volume than the original equipment (OE) radiator.
48mm thick, double-row core increases cooling surface area by 36%.
Quad-pass arrangement allows water to pass through the radiator four times instead of twice, maximizing the use of the core surface area.
Slightly higher 5mm ambient fin height (compared to OE 4.4mm), ensuring good airflow to the engine radiator despite the increased core thickness.
All-aluminum construction, complete with durable TIG-welded end tanks.
Increased fluid capacity (2.6 liters more) for optimal heat dissipation.
Installation
Our heat exchanger includes mounting points for the OE transmission cooler and both OE rock guards. Some trimming of the OE plastic radiator mounting frame is required to fit the larger do88 Performance front-mount heat exchanger (see installation instructions).