how are the Autospeed pulleys
10-15-2003, 11:07 AM
#25
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Yes and the tolerances are not without considering the harmonics of the components.
What happens when you balance a tire? It smoothes out. If you didn't balance it by some external means, it would continue to vibrate uncontrolled and eventually cause problems, ie with your hubs and cv joints, not to mention the annoyance. the point is that the dampener is there to prolong the life of the engine. Removing or lightening it, will have the opposite effect.
10-15-2003, 11:12 AM
#27
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thats not the point i'm trying to make...its the misinformation on this board that drives me crazy.
One person says X=Y and there is bandwagon following them...
I'm not saying you're it. There is validity to what you're saying but the fact of the matter is that there are Engines that can take using UD pulleys and LTWflywheels and some can't. E36 Inline 6 cannot do both but that doesn't mean that the 2.7 is the same. And my point is there is no evidence that THIS particular engine cannot run this mod...for what its worth, there are a few people running them without an issue. And because ONE kid on here blew up his engine, EVERYONE is so quick to jump out and blame the pulleys with no conclusive evidence...its frustrating for me cause all through college I worked in a Race shop building SpeedVision Touring and GT cars and learned a thing or two about what worked and what didn't especialy on E36 cars....and this problem is the most pronounced on this particular car. The harmonic frequency in THAT PARTICULAR motor did not like running Pulleys and flywheels simultaneously...but on the other side, we built a 700whp 300ZX that ran both and made 20whp from the pulleys...it loved both mods and the certain frequency produced by that motor was acceptable with both mods. *takes a breath*
Thats all I'm saying.
Peter
I'm not saying you're it. There is validity to what you're saying but the fact of the matter is that there are Engines that can take using UD pulleys and LTWflywheels and some can't. E36 Inline 6 cannot do both but that doesn't mean that the 2.7 is the same. And my point is there is no evidence that THIS particular engine cannot run this mod...for what its worth, there are a few people running them without an issue. And because ONE kid on here blew up his engine, EVERYONE is so quick to jump out and blame the pulleys with no conclusive evidence...its frustrating for me cause all through college I worked in a Race shop building SpeedVision Touring and GT cars and learned a thing or two about what worked and what didn't especialy on E36 cars....and this problem is the most pronounced on this particular car. The harmonic frequency in THAT PARTICULAR motor did not like running Pulleys and flywheels simultaneously...but on the other side, we built a 700whp 300ZX that ran both and made 20whp from the pulleys...it loved both mods and the certain frequency produced by that motor was acceptable with both mods. *takes a breath*
Thats all I'm saying.
Peter
10-15-2003, 11:15 AM
#28
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He's one of the few people to have a LW FW and UD pulley and you say it's isolated?
how?
How many people have blown the S4 engine: AFAIK - he's the only one on this board. What engine mods has he done that noone else has? LWFW and UD Pulley.
How many people have blown the S4 engine: AFAIK - he's the only one on this board. What engine mods has he done that noone else has? LWFW and UD Pulley.
10-15-2003, 11:16 AM
#29
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dual mass flywheels and heavy pulleys are there for ease of drivability.
And who said these pulleys or flywheels aren't balanced...THEY ARE. Balancing and harmonics are two different things. As long as you're not carving your own pulley out a tree stump in you backyard :-) and get it from a reputable manufacturer..it should be balanced very exactly.
10-15-2003, 11:17 AM
#30
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I see your point. I'm sure the failure of one or more motors
with multiple modifications cannot be solely attributed to JUST the pulleys. Agreed. I guess someone needs to test this theory by having no mods except for the pulleys -- NOT IT!