Pulley pulleys pulleys!
I started an "official" flywheel thread, thought I would start a pulley thread also that would have all the info in one spot. :)
SR Motorsports 0% lighter (2 pounds) 0 % underdriven 3 pulleys $0 SR Motorsports 45% lighter ? % underdriven 3 pulleys $430 includes belts http://www.shaneracing.com/RX8_Power_Pulleys.html unorthodox ? % lighter 11 % underdriven 3 pulleys $280 http://www.rx7store.net/product_p/unorthodoxrx8.htm Video with flywheel already- http://videos.streetfire.net/video/e...71cee4ae60.htm video with no flywheel comming soon. Agency Power 75 % lighter (1/2 pound!) 20 % underdriven 1 pulley (crank) $145 includes belts http://www.rx7store.net/product_p/ag...r%20pulley.htm Video - http://www.youtube.com/watch?v=LwCdf5WzP3k Rotary Expert 30 % lighter ? % underdriven 3 pulleys $ ? (there is no link from what I am told) Speedsource 80 % lighter 40 % underdriven 2 pulleys (crank, Alt) (eliminates A/C) $ ? (need a link) Gredy/TRUST Is this differant the the TRUST pulleys? ? % lighter 0 % underdriven 2 pulleys (alt, and water pump) $ 135 http://www.vividracing.com/catalog/p...ducts_id/23066 this is all the info I have found please post somehting if you have it. :) |
TRUST Pulleys for Alternator and Water Pump : Supposedly 20% lighter and not underdriven. Waste of money, show off.
Rotary Expert Pulleys: 30% lighter, suppose a little underdriven, very efficient for revving and 3-4 hp, nothing more than completion of a tune up. High quality, no check engine lights, unknown metal process. Number of pulleys: 3 These two I have tried myself. |
Speedsource pulleys. Two machined black anodized aluminum pulleys; main and alternator. Eliminates A/C drive pulley (no way to attach it due to the main drive pulley design). I'd guesstimate that the water pump is approx. 40% underdriven and the alternator is close to 80% underdriven. Intended for high rpm racing and only available through the Mazdaspeed Motorsport racer program for around $350. They are lighter maybe 1 or 2 lbs less (OE are steel) plus the weight of the A/C drive pulley that was eliminated (entire engine bay A/C system with pulleys, belt, hoses, condensor, etc. is 18 lbs).
Mazdaspeed claims 10 hp and frankly I'm inclined to believe it, but I have no dyno proof, just an overall seat of the pants. |
Originally Posted by peloponisios
Rotary Expert Pulleys: 30% lighter, suppose a little underdriven, very efficient for revving and 3-4 hp, nothing more than completion of a tune up. High quality, no check engine lights, unknown metal process. Number of pulleys: 3
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info has been added, I will try and get pricing on all of these when I get a chance.
thanks guys! |
wish there was a little more info. :)
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Unorthodox (info taken from web)
Our Underdrive Series of pulley sets provide power gains through weight loss and through the underdriving of all the accessories (which accounts for about 15% additional gain). In most applications all of our underdriving is done with the crank pulley, not the accessory pulleys. This is done so maximum weight loss can be achieved at the crank where most of the horsepower gains are found. |
1 Attachment(s)
I have the Agency Power pulley with before and after dyno's done. Not a whole lot of peak hp gains but as you can see the power is under the curve. Plus it is about 1-2lbs lighter than the original crank pulley.
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in the pulleys thread can someone explain more about what they do and how they work and pros and conns, as Im not too clear on what undrerdriven etc means
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I'll post photos and the price for RXpert Pulley Set is 400 euros. For the TRUST set the price is 150 euros.
From summer time and so on the RXpert pulleys will be available in USA, I think, not sure though. Look, as Team explained his pulley set is racing oriented for higher rpm's. So you see the cons(and no AC) but I am pretty sure that they are razor sharp and indeed produce the hp claimed. I knew this guy that had a similar setup, when he hit 7000 to 9500 rpm, all hell broke loose! But in lower rpm's a graveyard... So I went with street version pulley set and what you notice instantly is the free revving, nothing more. And of course due to faster revving the sound changes(if you have aftermarket exhaust). |
Originally Posted by california style
in the pulleys thread can someone explain more about what they do and how they work and pros and conns, as Im not too clear on what undrerdriven etc means
The only bad thing about it is that it slows down your accessories (if it is underdriven). If you have a big stereo system, then your lights may dim at idle. I had underdrive pulleys on my ZX2, and the AC didn't seem as cold after that, but who knows, that could have just been me. |
Can underdrive pulleys do any damage ?
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I've never really heard of an underdrive pulley doing damage. Of course, if it's poorly machine or installed, it can give you issues, but mostly it's a drivability issue. With an underdrive pulley, you are getting less alternator action, power steering pressure, and AC output. With the loss in inertia, especially coupled with a light weight fly wheel, can make the car rev really fast. Conversely, it'll drop revs quickly and be easier to stall. On the extreme, it is possible that your headlights will flicker when your bass hits. This is more likely an issue with you not using a capacitor than the pulley. Few underdriving effects are noticeable when driving. It is usually at idle when your car is running slowest.
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Personally, I wouldn't underdrive the AC on the 8 (unless you are racing, then why have it at all) as it is already not the best performing pump. Of course if I lived in the great white north, I might feel differently.
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lol @ crankshaft
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Agency Power Pulley Write-up by Staticlag
https://www.rx8club.com/series-i-aftermarket-performance-modifications-23/agency-power-underdrive-pulley-review-pics-90310/
Has pics, install notes, and recommendations. |
Originally Posted by Dro
lol @ crankshaft
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Originally Posted by Beodude123
Heh, I didn't even think about it... I know it's an eccentric shaft... But they perform the same function.
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posted some links,, can some of you find me some link to the ones I am missing. having a hard time finding them on the net.... thanks!
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Greddy has a pulley kit too.
http://www.vividracing.com/catalog/p...ducts_id/23066 Greddy web site has no info on underdrive or weight. It is a 3 piece set. |
added thanks!
wow 135 for a 3 peice??? |
Geez, just what we need, another Greddy product to f**k up the car. Hope their pulley system, isn't as half assed as their turbo kit is.
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Fanman, how did you choose your pulley setup? I know you purchased a lot of your products ealry on, and there weren't that many to choose from...but are you still happy with your setup? Got any pics that you can add to this thread?
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Originally Posted by alnielsen
Greddy has a pulley kit too.
http://www.vividracing.com/catalog/p...ducts_id/23066 Greddy web site has no info on underdrive or weight. It is a 3 piece set. |
Originally Posted by kwescott
Fanman, how did you choose your pulley setup? I know you purchased a lot of your products ealry on, and there weren't that many to choose from...but are you still happy with your setup? Got any pics that you can add to this thread?
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Fanman,
Any recommendations for someone wanting more power? Which mods and in what order? I've now got RB springs, sways and endlinks, and just got a typhoon II (b/c it was a great price). Want to learn from other's mistake$$. |
Unorthodox is 11% undriven
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thanks, it has been added.
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Originally Posted by Rhythmic
Fanman,
Any recommendations for someone wanting more power? Which mods and in what order? I've now got RB springs, sways and endlinks, and just got a typhoon II (b/c it was a great price). Want to learn from other's mistake$$. 1) I got the Rotary Extreme short ram, which was similar to the K&N unit, but later on took it out when I got the turbo kit. Wish I didn't get it, but at the time that was what was around (along with the K&N gen 1 but that was universally despised). 2) Next I got RB REV8 cat back exhaust. Loved the sound of it, but later sold it when I got the JIC Titanium. Looking back I should have just kept the RB unit. Sound is better, tips are better looking, and I shoudn't have spent $1300 on the JIC. 3) Got SR Motorsports pullies for $460. Only pully set around at the time. Dynoed it & made jacksh**. Wouldn't get pullies again, or if I did maybe the UR or Agency power. That way if they proved to do nothing, at least i would have only pissed away $250, instead of $450. 4) Got the SR Motorsports Hi-Flow cat (with additional resonator), which was a really good piece for me. Functioned perfectly fine for me when I was NA. When I put the turbo on, I had a lot of random backfire. Was told that it was because of the hi-flow cat, so I pulled it off, put the stock cat back on, and sold the unit. Should have kept it, as the problem wasn;t the hi-flow cat, it was the crappy Greddy E Manage & map. Later on I got the RP Supercat unit, which is fine now. 5) Got a Canzoomer unit, with cables & software from a poster on the board, but lost a race to a V8 Thunderbird the next night, wound up ordering the Greddy Turbo kit the next day. Looking back I should have kept the CZ & put it in my car & been done with it. See below. 5) Got the Greddy Turbo. Biggest mistake of my life. Thought it was "relatively" bolt on. Was literally one of the first 5 people on this board who got this kit put on my car. Have spent literally thousands of dollars to not only increase the hp on it, but moreso make it run right. Kit came incomplete from Greddy, and defective. I'll cover that in another thread on "Why Greddy Blows." there are going to be several much better alternatives coming out. Mine works now, but only with several thousands of dollars in mods. I would recommend you look at the upcoming PTP, Mazsport, Pettit Racing, Axialflow units. 6) Got the Greddy B Spec II boost controller & Greddy Type S BOV. Boost controller was a pain in the ass to set, and not very sensitive. Allowed my car at times when it was colder temperatures to overboost. Pulled that stuff off & replaced it with HKS EVC & HKS BOV. Lightyears better. Better control, and easier to set. Thought I was getting a good deal as Greddy is less expensive than other manufacturers, got junk. Other things : 1) Got 19" rims. If I had to do it over again i would get 18" rims. Too harsh on California freeways, and 18" chrome rims are just as blingy as 19." Overall, if I had to do it over again I would have 1. Got a real intake ala RB REVi w/Ram Air Duct or AEM 2. Got RB Cat back Exhaust (more for great sound, than hp gain) 3. Got either the SR Motorsports (with additional resonator) or RP Supercat hi flow cat 4. Kept my Canzoomer & tuned it to my car 5. Not bought rims (had 18"stockers in chrome, just would have kept them) 6. Shot myself before I got the Greddy turbo kit 7. Probably if I had wanted the extra hp just went & did the 55 hp Zex wet system like Charles R. Hill & Addictive have & shown to work with minimal problems. 8. Still got the Axialflow shortshifter because it is a great unit. I would ahve had around 240 whp setup with minimal trouble, and spent thousands, & thousands of $ less. I have almost 300 whp now, but spent some much more time & anguish on this project. |
Originally Posted by staticlag
I'm pretty sure thats only a 2 piece lightened alternator and water pump pulley set, no underdrive, no crank pulley.
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Originally Posted by Fanman
The best mod I ever did for the car was the RB suspension kit, so you are off to a good start.
1) I got the Rotary Extreme short ram, which was similar to the K&N unit, but later on took it out when I got the turbo kit. Wish I didn't get it, but at the time that was what was around (along with the K&N gen 1 but that was universally despised). 2) Next I got RB REV8 cat back exhaust. Loved the sound of it, but later sold it when I got the JIC Titanium. Looking back I should have just kept the RB unit. Sound is better, tips are better looking, and I shoudn't have spent $1300 on the JIC. 3) Got SR Motorsports pullies for $460. Only pully set around at the time. Dynoed it & made jacksh**. Wouldn't get pullies again, or if I did maybe the UR or Agency power. That way if they proved to do nothing, at least i would have only pissed away $250, instead of $450. 4) Got the SR Motorsports Hi-Flow cat (with additional resonator), which was a really good piece for me. Functioned perfectly fine for me when I was NA. When I put the turbo on, I had a lot of random backfire. Was told that it was because of the hi-flow cat, so I pulled it off, put the stock cat back on, and sold the unit. Should have kept it, as the problem wasn;t the hi-flow cat, it was the crappy Greddy E Manage & map. Later on I got the RP Supercat unit, which is fine now. 5) Got a Canzoomer unit, with cables & software from a poster on the board, but lost a race to a V8 Thunderbird the next night, wound up ordering the Greddy Turbo kit the next day. Looking back I should have kept the CZ & put it in my car & been done with it. See below. 5) Got the Greddy Turbo. Biggest mistake of my life. Thought it was "relatively" bolt on. Was literally one of the first 5 people on this board who got this kit put on my car. Have spent literally thousands of dollars to not only increase the hp on it, but moreso make it run right. Kit came incomplete from Greddy, and defective. I'll cover that in another thread on "Why Greddy Blows." there are going to be several much better alternatives coming out. Mine works now, but only with several thousands of dollars in mods. I would recommend you look at the upcoming PTP, Mazsport, Pettit Racing, Axialflow units. 6) Got the Greddy B Spec II boost controller & Greddy Type S BOV. Boost controller was a pain in the ass to set, and not very sensitive. Allowed my car at times when it was colder temperatures to overboost. Pulled that stuff off & replaced it with HKS EVC & HKS BOV. Lightyears better. Better control, and easier to set. Thought I was getting a good deal as Greddy is less expensive than other manufacturers, got junk. Other things : 1) Got 19" rims. If I had to do it over again i would get 18" rims. Too harsh on California freeways, and 18" chrome rims are just as blingy as 19." Overall, if I had to do it over again I would have 1. Got a real intake ala RB REVi w/Ram Air Duct or AEM 2. Got RB Cat back Exhaust (more for great sound, than hp gain) 3. Got either the SR Motorsports (with additional resonator) or RP Supercat hi flow cat 4. Kept my Canzoomer & tuned it to my car 5. Not bought rims (had 18"stockers in chrome, just would have kept them) 6. Shot myself before I got the Greddy turbo kit 7. Probably if I had wanted the extra hp just went & did the 55 hp Zex wet system like Charles R. Hill & Addictive have & shown to work with minimal problems. 8. Still got the Axialflow shortshifter because it is a great unit. I would ahve had around 240 whp setup with minimal trouble, and spent thousands, & thousands of $ less. I have almost 300 whp now, but spent some much more time & anguish on this project. words to live by..... i have. would like to be the early guy, but i dont.... i have to fight it.... my upgrades are modest, but with attention to detail.... as i stated before the last thing i would do is pulleys... the thing i did not do first that i regret.. lightweight flywheel.... but that is comming.. beers :beer: |
Greddy pulleys as I formentioned are just for bling bling. Two of them and of course the blueish colour that we like is gone in a matter of time due to the heat, so you pay 135 for two pulleys that don't do jack and lose their only attribute that is fascinating(colour) in a week. No, I don't recommend them in any way.
EDIT: There is no web link for R-XPERT Pulley Set. |
That ebay Greddy/Trust set looks a little shady........Description says it only replaces the alternator and water pump. The picture is of 3 pullies. I am pretty sure that in Japan Greddy and Trust are the same company or one is a sister company or something like that. Their pullies are the same size as the stock ones so their underdrive will be 0%. They are just lighter and have a magical blue coating.
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thanks, I didnt notice that part in the auction that stated only two pulleys. ebay has been deleted.
added 0% to gredy I am also thiunking that gredy and the trust pulleys are the same. I just didnt know it the TRUST I have up there is the same TRUST as gredy's TRUST. ( TRUST is the main company in Japan, Gredy is TRUST's american sister.) |
Originally Posted by TeamRX8
Speedsource pulleys. Two machined black anodized aluminum pulleys; main and alternator. Eliminates A/C drive pulley (no way to attach it due to the main drive pulley design). I'd guesstimate that the water pump is approx. 40% underdriven and the alternator is close to 80% underdriven. Intended for high rpm racing and only available through the Mazdaspeed Motorsport racer program for around $350. They are lighter maybe 1 or 2 lbs less (OE are steel) plus the weight of the A/C drive pulley that was eliminated (entire engine bay A/C system with pulleys, belt, hoses, condensor, etc. is 18 lbs).
Mazdaspeed claims 10 hp and frankly I'm inclined to believe it, but I have no dyno proof, just an overall seat of the pants. |
technically yes. like a lighter flywheel you lose spinning mass, makinging it harder to take off.... but in reality no, it really just is not enough to make it hard to drive. i doubt it would be enough to even notice. (the take off, reving i am sure you do notice)
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What about Pettit in Flordia?
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Originally Posted by swoope
wow,
words to live by..... as i stated before lightweight flywheel.... that is comming.. beers :beer: Are you threatning us again? :beer05: We'll belive it when we see it :hahano: |
Originally Posted by Razz1
Are you threatning us again?
:beer05: We'll belive it when we see it :hahano: a very silly deal on new d specs came up... had to do the prudent thing....:cwm27: beers :beer: |
TRUST & Greddy pulleys, of course they are the same!!! My mistake that I used both firm names for the same product. Sorry!
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n00b questions.
If I get the Unorthodox pulleys; A) Do I need a different size belt? If yes, Do they provide a belt with the set? B) Where would I get replacements for the new size belt when the time comes? - Cesar - |
Looks like SR and Agency Power are the only ones that come with new belts...am I to assume that you can use the OEM belts with the other pulleys, or will you have to go out and find new belts for each of these kits?
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due to the reduction UR and AP do require smaller belts. they DO give you the part number though so you can go to any parts store and pick it up (UR)
AP comes with a new belt already. ( I belive) |
ghost was under the assumption that you could tighten the stock belt to fit?
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i belive no. :)
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added a link to a video of the pulley install after the flywheel was alrady on. will add a vid with no flywheel soon.
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Originally Posted by speeddemon32
i belive no. :)
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Originally Posted by abbid
IF im not mistaken, The RX8 has an electric power steering unit.
beers :beer: |
yes, it is electronic power steering. you turn the wheel one direction, and within mimiseconds, the electric motor helps you turn in that direction. :)
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Hi guys i got the SR pulley kit and other than looking bling (not what i got them for) they did little els all other than make my Engine management light come on and blink.......can any help don’t know who to get it off, Mazda Uk seem puzzled to, any ideas?
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