 » Site Navigation | | | | » Recent Threads | | | |  |  |  | |  05-27-2007, 01:36 PM | #16 | | Senior Member Join Date: Feb 2004 Location: Port St. Johns, Florida Posts: 2,242 |
IIRC, Don't some claim underdrive pullys could have a neg effect on a engine?
I remember reading something on BF.c, but since it was referring to a M50B25...I didn't really read too deep into the thread. |  |  | | 05-27-2007, 02:57 PM | #17 | | Senior Member Join Date: Aug 2005 Location: Florida Posts: 2,525 |
Yeah. A lot of people seem to think that running underdrive pulleys along with a light weight non-counter balanced flywheel can cause the crank to vibrate itself to pieces on the i6 engines. Something to do with the length of the crank and the way it is balanced. Probably not an issue on the m42 or m44.. I've never seen any hard evidence of something like that. I'd rather go with just lightened pulleys as opposed to underdrive pulleys just because I've never heard of anybody running them on an m42.. But if we can get a GB together for 180+shipping I'm game.
Anybody have any clue on the quality of these things? | | | | | 05-27-2007, 04:52 PM | #18 | | Senior Member Join Date: Jun 2006 Location: SOUTH Jersey Posts: 1,085 |
Quote: Originally Posted by HuGo  I call GB!
Any takers? | Me! Can I get them without the black coating? I would rather have a nice brushed aluminum or even something I can polish for a little bling under the hood. Quote: Originally Posted by Panzer_M IIRC, Don't some claim underdrive pullys could have a neg effect on a engine?
I remember reading something on BF.c, but since it was referring to a M50B25...I didn't really read too deep into the thread. | I ran an underdrive crank pulley on my old hyundai Tiburon, an engine that is known for not being as strong or well built as the M42/44, I ran that pulley for 65,000 miles (put it on at 70,000) and never had a problem | | | | | 05-27-2007, 05:06 PM | #19 | | Senior Member Join Date: Mar 2005 Location: Portland Or Posts: 2,666 |
Quote: Originally Posted by nuvolarossa I'm sorry but this isn't true  Only two things for raise the boost with a roots supercharger are: 1) BIGGER crank pulley; 2) SMALLER supercharger pulley... bye | Your right! I was working the opposite problem at the shop when I wrote that.. Oops  Was trying to slow down an alternator.... Have a 5" crant and a 2.25 alt pulley, it wasn't liking life at the 6500 rpm the engine turns on the straights. Dave __________________
Dave - PDX
1995 318ti - Active Black and Tan.
2005 330xi - Mtech 1 - 6spd - Orient Blue/Black | | | | | 05-27-2007, 05:30 PM | #20 | | Senior Member Join Date: Jul 2004 Location: Florida Posts: 1,595 |
Quote: Originally Posted by Panzer_M IIRC, Don't some claim underdrive pullys could have a neg effect on a engine?
I remember reading something on BF.c, but since it was referring to a M50B25...I didn't really read too deep into the thread. | I read about that. A ltw flywheel and crank pulley combo are bad for the engine. The big downside to the crank pulley is because the dampener is lost with the crank pulley causing the to possibly lose control and blow the engine. | | | | | 05-27-2007, 05:31 PM | #21 | | Senior Member Join Date: Jul 2004 Location: Florida Posts: 1,595 |
I was thinking that $200 was a lot for these. UUC sells Underdrive pulleys for $165 I think. Any possibility to get these down to about that price? | | | | | 05-27-2007, 07:32 PM | #22 | | Senior Member Join Date: May 2007 Location: Lake Oswego, OR Posts: 136 |
what if i got the ud pulley, lwt flywheel, and crank pully? any problems on the m44? how much performance increase? __________________ Quote: Originally Posted by halobeamin it's the way to go..
I have money for mods if i want them, gas cause ill want to drive them, and honey's who will want to get in them | | | | | | 05-27-2007, 07:44 PM | #23 | | Senior Member Join Date: Aug 2006 Location: Central NJ Posts: 2,440 |
I saw these in person (the prototypes). They are the only company that sells them and they call $180. | | | | | 05-27-2007, 07:55 PM | #24 | | Senior Member Join Date: Jul 2004 Location: Florida Posts: 1,595 |
Quote: Originally Posted by Zacki what if i got the ud pulley, lwt flywheel, and crank pully? any problems on the m44? how much performance increase? | The crank pulley has not been made for the m42/44. That issue has been seen with the m/s-50/52 and I' sure it would be the same with the m42/44. Even if there is a crank pulley it is highly not recommended to have underdrive pulleys and crank pulley at the same time. | | | | | 05-28-2007, 02:16 AM | #25 | | Senior Member Join Date: May 2007 Location: Lake Oswego, OR Posts: 136 |
Quote: Originally Posted by Viper3812 The crank pulley has not been made for the m42/44. That issue has been seen with the m/s-50/52 and I' sure it would be the same with the m42/44. Even if there is a crank pulley it is highly not recommended to have underdrive pulleys and crank pulley at the same time. | what about ud pulleys and light weight flywheel __________________ Quote: Originally Posted by halobeamin it's the way to go..
I have money for mods if i want them, gas cause ill want to drive them, and honey's who will want to get in them | | | | | | 05-28-2007, 02:23 AM | #26 | | Senior Member Join Date: Jul 2004 Location: Florida Posts: 1,595 |
Shouldn't be a problem. The big problem is the crank pulley and ltw flywheel which are on opposite ends of the crank. | | | | | 11-01-2007, 08:40 PM | #27 | | Senior Member Join Date: Apr 2007 Location: Auburn, WA Posts: 1,814 |
i want the ud pulleys __________________  5/96 318TI Sport BIG TURBO | | | | | 11-02-2007, 12:06 AM | #28 | | Senior Member Join Date: Aug 2004 Location: state college, pa Posts: 3,431 |
Quote: Originally Posted by Mad-Machine Me! Can I get them without the black coating? I would rather have a nice brushed aluminum or even something I can polish for a little bling under the hood. | They look anodized. A bit of oven cleaner will strip the dyes, leaving both the original aluminum color and whatever protective material is bonded to the surface. __________________
I scream, you scream, we all scream for ZOMBIES. | | | | | 11-03-2007, 11:10 AM | #29 | | Member Join Date: Mar 2005 Location: Rimini, Italy (Europe) Posts: 73 |
hello,
Nobody has tried these pulleys?
only JHY produces this items for our M42/44???
in europe there aren't any brand that produces this light pulleys...
excuse my english.
goodbye. __________________ I'am italian!
 | | | | | 11-03-2007, 02:11 PM | #30 | | aka Stabby Join Date: Nov 2004 Location: Mead, CO Posts: 5,336 |
i would potentially be interested. __________________ 1996 318ti, California package, 267k miles
current mods: bilstein sports, bavauto springs, e30 m3 LCABs, solid metal ball joints, bavauto RSMs w/reinforcements, e30 3.73 LSD & halfshafts, supersprint cat-back exhaust, turner rear sway bar reinforcements, IE poly subframe & RTABs + camber/toe kits, powdercoated e36 32x front calipers, sport mirrors, H&R 28mmF/19mmR sway bars, x-brace, auto solutions SSK w/poly bushing upgrade, BMW CD43 head unit, DICE HD Radio w/iPod integration and "stealth" HD antenna, staggered style 68s, orange electronic TPMS, leather arm rest, JT Designs metal undertray
acquired and awaiting install: heated seat kit, cali top switch relo, lumbar support kit, park distance control kit, heated washer nozzle kit, m-coupe rear subframe, trailing arms, differential, and halfshafts, m-coupe front/rear brakes with master cylinder, under hood light kit, mud flaps, rear sun blind, auto-dimming rear view mirror, tilt steering wheel retrofit, apexcone 5000K HIDs with 55W ballasts
2002 X5 4.4 Sport Package, 53.5k miles
Current Mods: e46 m3 steering wheel | | | | | |
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