greyBLITZ

iTrader: (2)

At one point in time I stumbled across Lextreme and found an amazing article and photo of the 1UZ torque curve which shows how flat it is. It seems that page is long gone and the torque curve photo for the stock 1UZ is impossible to find. Anyone have a dyno sheet of it?

Also, as a general question, what are some factors that allow an engine to have greater low-end power as opposed to high-end?

MR_F1

-stroke....or more specifically, bore/stroke ratio.
-CR
-cam profile
-headers
-intake runner length/profile

greyBLITZ

iTrader: (2)

That makes sense. So how do each of those factors contribute to the low-end or high-end power?

Stelth91

more cylinders = more low end power. Most of those 4-bangers which advertise as having 400hp after mods is at like 8k rpm, while the viper toque and Hp max is at like 4k rpm.

Longer stroke is going to contribute to better low end, but lower of a redline.

Cornellian

For greater low-end power you want more torque since, your RPMs are not that high.

Few things you can do as others' have mentioned is to have a bigger stroke but, more specifically, a bigger throw of the crank. Making your Conrods longer to make stroke bigger will not help much. Obviously, the 2nd solution is to make the bore bigger. But, I would opt for a bigger throw.

timer00

I have my 99 LS400 recently dyno'd and here is the sheet

http://www.tamaquatech.com/t1m3r/dyno.jpg

Looks pretty flat to me

greyBLITZ

iTrader: (2)

Exactly what I'm looking for! Thanks very much!