Tauranga motor racing couple Grant and Lorraine Brennan are defending 88 charges of ACC fraud in the Tauranga District Court.

The Judge alone trial before Judge Glen Marshall is set down for six weeks.

The Brennan trial is set down for six weeks.

The Brennans are accused of receiving in excess of $700,000 in ACC payments from December 1999 to September 2011.

The payments started after Grant was hospitalised following an assault in 2009. The claims were supported by medical certificates and reports.

Lorraine received payments as compensation for helping her husband.

ACC claims that over the years the Brennans made out Grant was more incapacitated than he actually was and that, while receiving ACC payments, he continued to compete in motor racing meetings and continued to work on cars as part of the Brennan Racing business.

The crown is claiming Grant deliberately underperformed in testing to keep receiving ACC payments.