how to free up some low end power?
 

ok guys this is a strange but yet important question .... how do i get my engine to put out more low end power .... this is somewhat nessary due to the fact that i will be taking my car to the strip ... so id like to be able to have a bit more low end power .. and ideas would be great thnx

There's really no such thing as low end power, so you're going to have to learn to launch on the high end. It can be done! Do a search on the subject.

V8 swap

Or a supercharger.

So long as it's not a camden charger...

Learn to double clutch into 1st. 1st gear is short enough that you should be up in the power band for pretty much any autocross track.

Alternately, a supercharger is good for low end torque, or a fancy multi-turbo setup could be arranged to give you full boost down low but still flow well for power up high.

-=Russ=-

A supercharger is very fun for low end torque, even the camdens rat ;)

My turbo car makes more low-end torque than the camden! :D

Your turbo is also bigger than my engine ;)

Can't argue that!

ahaha, yes, low end torque, just replace your turbo with one the size of SonicRAT's, you wont complain anymore about low end torque I promise lol

I always thought huge turbos had crappy low-end torque.

Well, don't get too ahead of yourself, if ya go twice the size of your engine ya get that nasty turbo lag!

I was always under the impression that huge turbos take much more time to spool up but give lots of boost on the high end (since the car is using much more air at high end a big turbo will supply lots of extra.) Small turbos can only supply limited amounts but spool up very quickly allowing you car to use the turbo at very low end. Thats what's nice about chargers though, because it doesn't run off exhaust and therefore no lag at all and supposedly the lowest end torque increase possible.

But without as much of a top end gain. There's always a trade-off you have to make depending on what your goals are.

It's all about properly sizing, that and ball bearing helps. A supercharger beats most properly sized turbos in about 1k - 2k rpm, around 2K rpm from most dynos, most turbo cars are producing more torque (and continue to produce more) than most supercharged cars posted here have (short of the whipple car I built).

Also note, most of what me and Tech were talking about was simple joking.

^ last time I checked ported motor with N2O spool gives you boost right off the line :-P

iceblue - yeah if you don't want traction ;P

Sonic, what was the RPM range on your whipple any ways, wheres the dyno sheet at?

Well damn! No one told me they wanted traction!!!

The closest thing to the dyno graph is pianoprodigy's comparison in excel, it's just like a roots blower, instant boost as soon as you press the throttle.

20B
NOS
SC
:D


-Ted

when it comes to low end power and torque......there's no replacement for displacement.....20B or go balls out and put a 4 rotor in it.....

If we're talking about NA, there are a few things you can do:

-Turbo it. Seriously a turbocharger not only makes for more power top end but improves the torque curve all the way around. If you're just looking for more grunt, you don't need some kind of monster turbo. The stock turbo on an NA makes a world of difference. It's the first thing I noticed when I did mine.

-In the same sense, supercharging seems to work. :)

-Make sure the aux ports are working. Sounds simple, but it gets overlooked alot.

-Long tube headers. Increase the scavenging effect.

-Custom intake manifold. Longer runners will shift the powerband down. Higher velocity = more low end punch.

-20B. No replacement for displacement. Build a 20B NA with high compression rotors, a good intake manifold and a decent port.

-Peripheral port. A nice PP engine with an open exhaust and intake (um, slightly loud) will show a better powerband starting at about 2.5K RPM (dyno graphs have been posted here before).

Cutoff some weight as mentioned in the archives in different best bang for buck things.

Get lightweight wheels, left mass to spin up means more acceleration.
Same thing with a lighter flywheel

Reduce brake resistance and make sure all bearings are operating as smoothly as possible.

Switch to the 4.33 differential from the gtuS