Never. It really needs to have a fluid flush, though. He said when he checked the level the fluid was chunky??????? That really scared me. I don't know how old fluid would slow his car down, though. I'm positive it wasn't slipping.
And another thing, the Series II N/A have way more low end than anyone gives them credit for. Here'* the torque curve for the Series III N/A 3800, which is almost identical to the Series II torque curve.
By 3500 rpm, the L36 is making 150 hp and should be kicking the crap out of your LN9. At about 1500 rpm, it'* making 215 lb-ft. of torque, which is ALMOST equivalant to the LN9.
The L36 is like an LN9 that holds on to the powerband for about 1000 more rpm.
And I did notice how it seemed 50-70 was quick considering how slow his car was to 25 mph. I really can't figure that one out. If you were in his car, you'd realize just how slow a launch is. He was in my driveway once and I didn't believe that he couldn't spin his tires with the e-brake on, so he got into his car, put the e-brake on all the way, and floored his car. It just moved foreward a few feet, dragging the rear tires. It didn't even squeek a little.
I had to admit at that point his car was slow.