Brettus

iTrader: (2)

lots have it - it does not cause any problems - it is going to be good for as much HP as the others
AND - its the cheapest .
Need I say more ?

eforer

I'm interested in doing an underrdrive pulley primarly to keep the water pump from cavatating on hot track days. Although I'd like to do the agency pulley deal, I kind of like cold A/C. Is there anyone out there who makes a pulley set like the Greddy/Trust that actually has some underdrive? Just a water pump pulley would be fine too. I just want to have the water pump A-Okay for extended high rpm driving at lime rock this summer.

If not I'll just roast and go for the agency. I'm thinking Agency Pulleys and the RB reflash (mostly for the fan turn on change) would be a nice improvement for both the cooling with some modest performance gains and some driveability to boot.

Brettus

iTrader: (2)

Need2Speed

Can anyone tell me the torque specs for bolts on alternator & water pump pulley?

eforer

Ordered the agency pully last night. Vivid racing has some up on ebay (brand new of course) and they are taking "best offers" and I submitted $100.00 which they accepted. Including shipping $113.00.

I'm going to send my car to the dealer for another checkup before sending the PCM to Racing Beat. I want to have the coils changed out (its an 04 and is getting sluggish) and they are still the original P/N coils. After that the PCM will get done and I'll hopefully have a nice, cool running RX8 for the summer months. I really hope the agency pullies keep the coolant flowing nicely with the RPMs up high.

Next step tires!

$lickmurf

i put the unorthodox racing pullys on and I definately noticed better throttle response and torque as well as better pickup in the lower RPM's and my A/C wasn't effected too much
- the torque specs i got with those pulleys were 8NM for the crank and water pump and the alternator didnt have one so to be sure i called and they just said to crank it on with the impact gun

BoosTED

iTrader: (2)

As long as you have an impact wrench to get it off, if it needs to, you should be fine.

nordichunter

ok maybe im not looking hard enough... but for agency power pulleys... all i find is the crank shaft pulley.. is this right? or should i keep looking to find a set? I'm in iraq right now so i cant get on ebay if that is going to be a sugjestion... and if its only the crank pulley then why shouldnt i pay a little bit more and get the SR pullies?


ok so maybe not the SR pulleys... did find some unorthodox racing pulleys... three pulleys... "80 to 85%" lighter and "15 to 20%" underdrive for $300... Good idea?

RedefineRX8

iTrader: (-1)

The agency power is the only pulley that matters unless you are doing a a/c delete. It's just the crank pulley, which is the one where any 'gains' will be found and is also the most underdriven. The stock pulley is pretty light as it is, but the agency power is a good light pulley that frees up a little bit. Have had mine on for almost a year and still give it a thumbs up.

BoosTED

iTrader: (2)

The Unorthodox SS pulley set is also great.

If you want a complete set that is what I would recommend.

TrochoidMagic

i'm running a greddy egay knock off pulley. its well worth the $50 and is about 6-7oz lighter for the overall pkg. but then again, the overall pkg is only the alt and the waterpump pulley. great for those who don't like the idea of a cel after install OR under-driving anything while retaining stock belts.

knock on me all you want, and i don't normally put lesser quality items for stuff such as engine components. but in this case, its only $50 and passes my quality inspection. its worth every $ for the performance gain... better than $600 for an ??? cheap exhaust with unknown gains.

the dealer was something like deluboz.com or something...

just thought i'd relay the good deal to others who may be interested and low on cash needing a way to gain mpg/hp on their 8.

TrochoidMagic

^^p.s., don't blame top notch quality manufacturers for overpricing their ****. we've only got ourselfs to blame when we buy from others who have the machine and the manufacturing means to replicate a design...

so buy it if you're only going for its performance/light weight benefits. get the real thing for its name brand,show-off, etc. its your choice.

BoosTED

iTrader: (2)

I hadn't heard of pulleys increasing MPG.

TrochoidMagic

you don't know? how is this possible?

its pretty logic to me. more weight for a car means more of that mass to overcome, right? so in this case, i wasn't looking for shear horsepower out of that mod. but just the basic logic benefit of it.

if i don't "feel" 5hp gain from it... it doesn't mean that it hasn't physically changed. maybe jusst not as drastic. its the same case from ppl who spend $600 on exhaust looking for a 20hp increase, but really only get 3-4whp and the noise.

i don't wanna put too much into this. i've spend only $50 for this mod, and there IS a benefit...maybe not for those looking for a kick-in-the-pants-power. but its there.

do this: look into crank pulley/harmonic balacers... and try looking for those mods for the V8 guys. see the difference. those things weigh pounds, pounds! shaving a few "pounds" for those cars equals a lot more power than ours... and for any bulky domestic cars, saving weight= mpg's.

if you can find facts to prove me wrong, come back and i'll give you exclusive rights to laugh at those who've spent $300 for their pulleys k?

TrochoidMagic

^^ o btw, my same logic reasoning for mpg/hp/performance goes for wheels as well.
look at my sig, see what i'm trying to accomplish. (yeah, i know i'm a weight dropping/free horsepower/ performance seeking *****)
and CF adds hp and mpg too! you didn't know?

laythor

I feel the hate welling inside of you.



take a pill TM, no need to lash out at someone asking a question

TrochoidMagic

^^why lathor, why?
did i seem mean? i hope not. it truly wasn't my intention.
it really seemed soo simple. so that question seemed more of a joke...maybe even sarcastic.

at any point, no offense intended.

BoosTED

iTrader: (2)

Cutting weight from wheels, pulleys, flywheels does not always equate to increased mileage. Why?

If an item is lighter, it does spin up easier and quicker, but it also spins down just as fast as it came up, therefore not holding the momentum that it would have if it was heavier.

A lighter car does not make a faster car, it makes it quicker.

A 3,200 lb 232 hp RX-8 will go just as fast as a 3,000 lb 232 hp RX-8. It will not be as quick to get there but it will (if it has the same drag coefficient).

PhillipM

It may well spin down faster, but even flywheels (which is what they are) don't store energy at 100% efficiency, and the fact you aren't doing so much work with the alternator and water-pump means it should be doing better milage.

The actual weight saving is pretty insignificant in the scheme of things but every little helps.

A 3200lb car will actually be a little slower from the additional rolling resistance.

TrochoidMagic

maybe not all of us are into p.w.r for performance or something...

look, a prime example of just how "beneficial" a performance gain in saving weight can actually be seen as like adding horsepower and/or mpg would be
say...lotus elise. same honda b18 type r motor in a type r integra... but in a lotus.
whats the accel difference? and i wonder just how much gas is really needed to push around all of its 2200?? curb weight.

who knows a bit more on the lotus' here please chime in... isn't the newer ones with a toyota celica motor in it or what?

i can understand the misunderstanding of a lighter weigh engine component like the flywheel. if you want to get into that... one look at it in a way that a lighter part spins faster and slows faster... are we still building motors with light-weight pistons or heavier ones??? just another thought to consume.

all i'm saying is please think about it.

TrochoidMagic

^^that my friend, is the FIRST misconception you have. i'm not a pro drag racer, but any american old timer will be furious if they heard you say that. that, or take your bet on a race.thats a perfect win on a p.w.r based race.

look at your example again. identical rx-8s...which car would you put $$$ on?
i'm no genius, but i am no dummy either.

speeddemon32

he was not saying that the lighter car is no faster in acceleration. (which is what a drag race is.) the weight is the MOST important in an acceleration race as with a handling race. It sounded to me that that he agreed to this.

he is saying that the top speed is no higher on the lighter car because air resistance will stop you. he is right to a point, BUT not really......

even with the same car with the same co efficient of drag, you still HAVE the drag.

lets say for numbers sake an RX-8 with 238 h.p. can no longer push the 3200 pound car through the air at 160 MPH. (which is pretty close, and of course depends on air density) assuming your in the same car, with the same power, at the same race track, on the same day, at the same time of day, with the same temperature, and the same air density, (get my drift) that same 238 h.p. engine could push a 2200 pound car through the air at lets say 170 M.P.H. because it does not also have to push that extra 1000 pounds. it leaves more power on tap to fight the resistance.

THe RX-8 has a gear ratio that tops out at something like 180 m.p.h. so mathematically with he gears in the car it is possible to go that fast. you simply need the h.p. and weight ratio to fight the air resistance. (and of course no speed limiter)

now of course if the RX-8 didnt have the gear ratio to go that fast, it does not matter how much h.p. you have or how light your car is, when you hit the redline, you simply hit the redline. the car will go no faster in top speed. the only way to go faster when that is your problem is to change the rotating speed. which can be done by a higher engine redline, changing the tranny gears, changing the diff gears (most common), bigger tire rollout..... etc. but of course this is not the problem of the RX-8, nor was it really the topic of this discussion.... he he he


anywho, less weight, more power, is always a good thing. no matter what. no if, ands, or buts about it.

with that said, is removing the 10 pound radio in your car and driving around with no tunes in a daily driver worth it.... not really. youll never notice it. but the lack of tunes would get real old real fast.

would I stress loosing 5 static pounds off the car if it meant no longer having the foam rear seats on a street car.... no way. youll never notice it. it makes your car look like crap and for what... .001 seconds at the local street drags. please, just work on your reaction time, that will make a bigger diferance by far.

would I take 3 pounds of spinning mass of the engine and still be able to use a/c (pulleys).... you bet. spinning mass is WAY more inportant. and there is no real down fall to doing it.

would I take 5 pounds of spinning mass off the flywheel with no real disadvantage to a street car... yup. again, why not, no down fall, every little helps... why not.

would I remove 1 ounce off a race car to save weight... you bet, its a race car. if it does not directly impact performance or safety, it does not need to be there. its nothing more then dead weight and in the way.

staticlag

With the new BHR flywheel pressure plate setup thats coming out, its going to remove a hell of a lot more than 5 lbs of spinning mass off the flywheel

speeddemon32

even more reson to do it then.

make sure you post the info in the flywheel thread when its available.

BoosTED

iTrader: (2)

You missed the point.

How fast does your car go? ... top speed

How quick is your car? .... quarter mile time