Quote:
Originally Posted by Steve1968LS2
Well, if you can make a given power level at a lower RPM then it will require less air.
Our test was on a 454 big block and it made less power with the EFI than it did with a larger (1000 or 950 CFM) carb. It was when we moved down to a 750 cfm carb that we got similar dyno numbers. It was down about 30 horsepower, not a hugh amount.
And yea, I think the efficiency of the LS helps. In our case the big-block made something like 502 hp and 535 tq.. on another engine, like an LS, it might make more. But, it can only move so much air. I need to ask FAST what CFM the throttle body is rated at. Going by the dyno data the fuel was fine, it (in our application) was just running out of air.
I would like to see your data and talk with you about the LS install. Email me at [email protected]
But the math says it can only support so much HP based on only having four injectors. Oh, our test was ran at a fuel pressure of 45 lbs.
Again, it's a great, easy to install system that covers a huge percentage of the engines out there, but if you are building an all out race engine you really need to step up to one of FASTs bigger systems. |
Thanks Steve. E-mail sent.