The Ultimate 7

That does have something to do with it. A 13BT has similar issues. That bend in the secondary runner will cause just enough turbulance to slow down the air flow into that rotor. With the rear secondary runner creating less turbulance to the rear chamber, the air will fill the rotor chamber more efficiantly than the front. Thats why the rear runs leaner. Turbo, lean, and rotary don't mix. Rob Golden said at sevenstock that the LIM's design was an issue. With two EGT probes installed before the turbos, the rear had higher EGT's. He compensated by consentrating most of his porting in the front chamber and increasing the injector duty cycle in the rear to add more fuel. This is the way he attempted to balance things out.

Pourman

All that being said , is the Groundzero LIM functional in it's defense of rear rotor temps , and is it worth the $$$ ??

Pourman

Anyone ???

Pourman

Someone please answer me so I don't get stuck with an expensive boat anchor if it doesn't work properly

P'cola FD

According to groundzero and Pineapple it is worth it. I'd like to see some more testing, but if nothing else, it has to do some good, as the runners are equal length. After some more testing and folks have had it on their cars, I may buy it. Fred, if you're worried about not spending money just yet, you can tune your car safely, to the power output that you're wanting with the stock manifold.



I'd be willing to bet that the manifold helps with the rear rotor running lean, I was just curious if that is THE reason for it running lean/blowing up, or if there were other factors.