Quote:
Originally Posted by grahambehan
At the time of the project ending announcement Roy Midgely made a presentation to the LT5 team at Lotus which included a page and a half of A4 bullet points on the technology transfer from the LT5 programme to what would become the LS engine family, guess I need to dig that out.
Meanwhile, fuel to the secondary debate  |
Thanks for posting that dyno graph Graham I have never seen a Secondary open vs. Secondary Closed dynograph overlayed before.
As expected extra airflow adds power and torque, and also raises the rpm at which peak power and torque occurs.
Looks like having the plenum throttles open costs about 30 lb/ft of torque at 2500rpm, I assume that if we exrapolated that graph to lower rpm, we would see even more torque loss with the Plenum throttles closed..
Both PT open and PT Closed both make the same 290 horsepower at 3900rpm.
Thanks again Graham.
peace
Hog