low-rpm power mods?
#1
low-rpm power mods?
Hey guys, I'm pretty new to tuning but it seems like most mods out there are geared towards giving you top end power... looking at dynos for headers, intakes, and exhaust it looks like they give you nothing in low end and actually sometimes takes away power...
anyway, for normal driving i'm always within the 2-4k rpm range... is there any mods out there that would give any kind of boost in that range? other than F/I?
and even with F/I, a turbo gives you mainly top end power too right? so is a supercharger the only good option?
anyway, for normal driving i'm always within the 2-4k rpm range... is there any mods out there that would give any kind of boost in that range? other than F/I?
and even with F/I, a turbo gives you mainly top end power too right? so is a supercharger the only good option?
#3
A screw or roots type supercharger would help But even the trd will be centrifugal, which still exhibits lag, although many times not quite as pronounced as a turbo, it is still there.
Here is how to look at it. HP = (tq * rpm)/5252. You want to increase torque in this application. So one thing NOT to do is use a light weight flywheel. You could start with a camcom and try tweaking the timing curves to optimize for lower rpm performance. Lighter weight 17" wheels would help you get more use out of your power across the whole band, especially at launch.
Sorry, not a ton of info, but a little anyways.
Here is how to look at it. HP = (tq * rpm)/5252. You want to increase torque in this application. So one thing NOT to do is use a light weight flywheel. You could start with a camcom and try tweaking the timing curves to optimize for lower rpm performance. Lighter weight 17" wheels would help you get more use out of your power across the whole band, especially at launch.
Sorry, not a ton of info, but a little anyways.
#5
Sticky tires and lighter wheels would definitely help in that department. Any type of weight reduction would get the car off the line more quickly and make the throttle responce feel better than it currently does. And in my experience getting a set of lightweight underdrive pulleys has helped out. Good luck man
#7
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Scion Evolution
Join Date: May 2004
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best low end power = upgrades on respones. such as
lighter flywheel, better clutch, lighter rims,
but if u insist on power mods. its not really needed because we already have low end power from our cams.
lighter flywheel, better clutch, lighter rims,
but if u insist on power mods. its not really needed because we already have low end power from our cams.
#8
hmm.. i guess with all the talk on these forums about getting more hp out of the engine i never really thought about upgrading the parts that actually get the power to the wheels...
definately something to look into now... thanks all.
definately something to look into now... thanks all.
#11
Originally Posted by hahaitzskippy
best low end power = upgrades on respones. such as
lighter flywheel, better clutch, lighter rims,
but if u insist on power mods. its not really needed because we already have low end power from our cams.
lighter flywheel, better clutch, lighter rims,
but if u insist on power mods. its not really needed because we already have low end power from our cams.
#13
what about something like ignition equalizer kit from Weapon R or grounding kits? Supposedly, they are suppose to give better throttle response? I dont how how much it will help with increased power but it mite help with launching better.
#14
yeah i've heard some people say the ground kit helps with that throttle delay and i've heard other people say it does absolutely nothing...
i doubt it makes a noticable difference, but i figure it can't hurt, so as soon i find a place that sells 4 or 8 guage wire around here or a place online i can order it from cheap, i'm going to make my own and see if it helps.
i doubt it makes a noticable difference, but i figure it can't hurt, so as soon i find a place that sells 4 or 8 guage wire around here or a place online i can order it from cheap, i'm going to make my own and see if it helps.
#15
and as far as the headers go, a 4-2-1 won't take away low end power right?
but then as far as i know the only option is the DC Sports, which i haven't heard anything good about yet.
and then if you don't get a wider s-pipe and exhaust doesn't that kinda defeat the purpose of a more free-flowing header? but then once you go wider, like hilow said, you lose back pressure.
but then as far as i know the only option is the DC Sports, which i haven't heard anything good about yet.
and then if you don't get a wider s-pipe and exhaust doesn't that kinda defeat the purpose of a more free-flowing header? but then once you go wider, like hilow said, you lose back pressure.
#16
Originally Posted by hilow
4-1 headers kills low end and header back exhaust also does because u lose backpressure.
I understand your theory behind the statement but it didn't come true with my otherwise OEM tC.
#17
Originally Posted by engifineer
Originally Posted by hahaitzskippy
best low end power = upgrades on respones. such as
lighter flywheel, better clutch, lighter rims,
but if u insist on power mods. its not really needed because we already have low end power from our cams.
lighter flywheel, better clutch, lighter rims,
but if u insist on power mods. its not really needed because we already have low end power from our cams.
-Tide
#18
^^ so under what circumstance would a lighter fly wheel help, high end?
I probably should be able to reason through it, and come up with the answer on my own, but to be honest, I was at work for 16 hours yesterday, and haven't slept nearly enough for coherent thought
I probably should be able to reason through it, and come up with the answer on my own, but to be honest, I was at work for 16 hours yesterday, and haven't slept nearly enough for coherent thought
#19
Originally Posted by hilow
4-1 headers kills low end and header back exhaust also does because u lose backpressure.
#20
Backpressure is true because with my dc sport headers (which are 4-1) and my header back 2.5 piping with a resonator and no cats kill my lowend, but gained top end. Now every race i have is different, i dont get the jump i use to get. Now i keep up on midrange/top end better.