jishead

I would get the 75.

Here's some info:

http://www.modulardepot.com/?show=articlesdet&aid=30
http://www.modulardepot.com/?show=articlesdet&aid=38

TruBlu03GT

Thanks for all of the help....It definitly made the 75 mm an easy choice.

andy98gt

Well i have some advice for all you guys doin your TB's and Intakes and everything that has to do w/ air. I was running a little lean and i had only had all these mods on for about 6 months. Cold air intake, 70mm TB, C&L Plenum. Im not sure if longtube headers and exhaust would make a differance. When i pulled off my old heads the intake valves were white, not super white, but they were getting there. I was running lean. I would imagine it was from all the AIR i was talking in and not compensating anywhere else. Think about it.

jishead

I don't get it. If your MAF is calibrated properly, and you don't have a vacuum leak, and your upstream O2's are working, and your computer is worknig then the TB/Plenum shouldn't be the cause. If the computer senses lean condition via the O2's I would think it would make an adjustment or fire your check engine light.

I had mine dyno'd twice on a wideband O2 rig but that was b4 I messed with the Tb/Plenum. No you have me wondering!