[zygotesoup]

Originally Posted by fzust

Guys,

This is a dead issue. I've pounded through this with the XP car since the inception. It is not related to ABS. This is related to lack of vacuum in the brake booster after a period of acceleration. With no vaccum in the brake booster, you will have essentially zero power brakes until the vacuum recovers. Replacing the check valve that is just off the motor will help. However, we solved it with a supplemental vacuum canister and an additional check valve. This supplements the vacuum available to the master cylinder. We do not have "ICE mode" anymore. The lotus OEM valve is a super-cheap plastic piece of crap and should be the first thing replaced. BTW, currently our tires are BIGGER diameter in the front vs. rear. This solution cured the braking problem when we had properly sized tires and it has not come back with the current configuration.

where can you get the replacement part and how difficult is it to install?