Quote:
Originally Posted by demonspeed
Do you have a link to a LFX curve? I tried searching but can't find one.
Here's a LS1 curve: http://www.geareddrives.com/LS-1%20HP%20vs%20Torque.jpg
That's great that the LFX makes 250tq at lower rpm, but the LS1 belts out 325tq at 1800.
Now, when we introduce E/T's, do we also want to consider trap speed? If so, you're going to see several mph lower with the LFX simply due to the lower power.
As an FYI, I'm not trying to infer the LFX is an inferior engine. I'm only speaking in the context of racing against a LS1 in equally-bodied vehicles. |
Yeah, DGThe3 posted it earlier.
http://www.camaro5.com/forums/showpost.php?p=6811088&postcount=32
The LS1 will kill it off the line. If I remember right it was stalled right around 1800 on the autos, so it was making about 110 HP when it launched. The LFXs are stalled to about 1700 and only make 80 HP off the line. But they are redlined at 7000 RPM and the torque drops off a lot on the LS1 after about 5500 RPM. They have to shift more to keep it in the power band. With 3.55 gears the LFX will stay between 5000 and 7000 the rest of the way down the track. That's pretty close to peak power. Still less power than the LS1, which is why it will be slower, but the difference is a lot less than just looking at peak numbers.
Not knocking the LS1, they are amazing engines and knocked Ford back on its heels. Mostly I got to thinking about all of this because the new LT-1 engine has a torque curve that is very similar to the LFX, just higher numbers. That thing will be a beast at the track with the right gearing and stall.