[PWORLDSTANG]

Originally Posted by Jeff@TotalPerformanceEng

You are absolutely correct. The 2.8H that was run on the lightning and made 1200rwhp, is the EXACT same as the 2.8H run on the LSx

Couple other differences though. As other members know in this thread, yet they just feel necessary to keep the info back cause it doesnt make their claims sound near as bad. The inlet manifold SUCKS. On a good day, you get roughlt 1067cfm out of it. If the 2.8H flows over 1500cfm (it actually flows more than that), yet the inlet feeding it only flows 1000cfm, it doesnt take a rocket scientist to calculate how much air will be fed to the motor.

IAT's... Again, anyone worth their salt in tuning knows that IAT's are DIRECTLY related to airflow and air compression. If your anemic on air, then you try to compress it, your temps WILL go up. This will be a non issue within the next 3 weeks. Although the IAT's will always be higher than other forms of F/I, they will be more than manageable. The member with 250* IAT's... The poster must have forgotten that the member had his damned cooling system ran backwards.. I have personally installed more KB's on LS platforms than anyone in the country, and I can say from first hand experience, we have NEVER had IAT's that high. Even in 117* ambient temps.

We already have 2 new inlet manifolds. One is flowing 1550cfm, but it needs a large TB (around 110mm) The other one flows a tad less, but will allow for a 90mm.

Twin Screws in general are significantly more efficient than roots style blowers. The reason OEM's use roots is for 1 reason, and 1 reason only. Its 3 times cheaper to manufacturer a roots blower.

Also, there have been 800+rwhp KB LS vehicles for 3 years now. Its nothing new. But this is a debate that will continue until the new inlet is released. Until then, it is very difficult to make the power. But it has NOTHING to do with the blower itself.

Agreed, good post.