Has anybody cross referenced the different stock crank pulleys between years and models? I have 95 ls crank pulley and it is a little bigger around for the alternator and alot bigger for the a/c but the p/s uses different type of belt than my 91. The type r pulley may be even larger. My thought is, using a larger stock pulley would have the benefits of undrive pulley but not the problems when the a/c engages.
OK so the way I read this is that as long as the crank pulley is not changed the engine will suffer no ill effects.Since I am only changing the a/c and alternater pulleys the potential theoretical damage maybe done to the alternator only.I have not noticed any difference in a/c output or light ouput from headlights when moving.When I am waiting for a light to change or stuck in traffic who cares.I can still be seen it is not as if the lights go brown just slightly dimmer.As for the a/c I just use the recirculate button in stop and go traffic…no problemo.Keep in mind to that almost any mod will give you something in one area and take it away in another.Nothing is free.As far as this mod goes for my 11 YEAR OLD car it is great.It bears worth repeating 11 YEARS OLD.Guess what if all I loose in the next 3-5 years is the alternator I would be as happy as the gut in my neighbourhood when he starts up his 512TR everyday.Lucky bastid!! Well at least I have been a pasenger in it a couple of times.
I thought i would let you guys know somethin bout the pulleys… i know AEM does this, and i believe some of the others do as well… but they have started making pulleys that retain the stock balancers…
aem’s new kit lets you retain the stock balancers meaning you only get ps and ac pulley’s.
on a b16 a unorthodox crank pulley nets around 3lbs of tq across the board, ps removal is about 3lbs of torque across the powerband, ac removed is about 1.5hp gain.
no ones mentioned the fact that the prelude engine revs much higher than ours, IMO a unorthodix-pulley will be fine for an LS but you wouldn’t want t do it on a gsr.
Are you sure about that? Ive always seen the ac suck more power than the ps… ts bigger, heavier, higher rotational mass… has to compress more…
Also, ignoring any harm to the engine, there is a point where cutting rotational mass (ie weight on pulleys, flywheels, etc) will have a negative affect on power. Cutting the momentum of the engine makes it so that after a certain point your engin has to work harder to keep it going. Kinda like how its easier to spin a wheel faster that is heavier (after you get it going). And also lower mass makes ‘dumping the clutch’ less effective on its own, you gotta give it hella more gas to get the same end result. This is because the staionary momentum of the tranny becomes increasingly greater than the rotating momentum of the engine.
Just points to ponder
Originally posted by MerlinofKolvir
[B]
Also, ignoring any harm to the engine, there is a point where cutting rotational mass (ie weight on pulleys, flywheels, etc) will have a negative affect on power. Cutting the momentum of the engine makes it so that after a certain point your engin has to work harder to keep it going. Kinda like how its easier to spin a wheel faster that is heavier (after you get it going). And also lower mass makes ‘dumping the clutch’ less effective on its own, you gotta give it hella more gas to get the same end result. This is because the staionary momentum of the tranny becomes increasingly greater than the rotating momentum of the engine.
Just points to ponder [/B]
cutting the momentum along the driveline will not make the engine work harder to keep it going at the same speed. the only thing that less momentum does is make the rpms drop quicker if there is no throttle applied. but on the flip side, it takes less work to get the rpms back up to the same level after they’ve dropped. in the end however, both engine configurations use the same energy to maintain the same speed, and if you have a steady right foot, you wont notice a difference. you are right about dumping the clutch though.