my buddy is putting a 8lb flywheel on his b18 hatch, and he's replacing his underdrive pully with one that weighs 1.8lbs. so he is taking almost 30lbs of his crank! i would think all that would make a big diffrance in the way the engine performes. what do u guys think?? anyone ever have the same setup?

 

You can never 'free up' horsepower.

 

do more search on replacing the crank pulley with an aftermarket one .. and you will find out that its not a good idea

 

u can "free up" horsepower, what happens when u take off the A/C

 

ya i know all about replacing the crank pully and the alternator probloms u get from it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1 &raquo;</TD></TR><TR><TD CLASS="quote">You can never 'free up' horsepower.</TD></TR></TABLE>

Actually you can, just like mugenwannabe said with the AC. That is just one example, there are other places (some more obvious then others) where decreasing parastic drag/loss frees up a little HP.

 

Kinda like upgrading your engine grounds

 

b17a crank is the way to go!

 

it's not going to make any horsepower.. it's going to make the car rev faster and decellerate faster... but try to buy a balanced crank pulley..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by d00kee &raquo;</TD></TR><TR><TD CLASS="quote"> b17a crank is the way to go! </TD></TR></TABLE>

wtf?? wut does that have to do with anythin in here?? lol

 

haha i have no idea i think i was stoned at that time and just not thinking str8 hahaha **** lookin though

 

yeah i hear replacing grounds on ur block, tranny ect. "free up" horsepower. . .

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1 &raquo;</TD></TR><TR><TD CLASS="quote">You can never 'free up' horsepower.</TD></TR></TABLE>


actually your wrong..lol


say u have a 90 dx crx with 90hp, with the dual point feul injection,and uswap it with the multi-port fuel injection, you free up a grip of horsepower.

like 13hp

 

actaully the crank pulley keeps your bearings balanced and when you get an aftermarket under drive pulley it is smaller to reduce rotational mass causing a gain in horse power or so they say. I recomend keeping the crank pulley unless your friend whats a cracked block. just a thought

 

lets try to not start a war of crank pulleys again.

its not that its balanced or not. its weather or not it has a harmonic dampener or not.

a harmonic dampener helps reduce the strain that is put on your engine from every time it fires. just search for it. you'll find like 1000 threads arguing on if its important or not.

over all it is IMO

 

uhh, correct me if I'm wrong but aren't honda engines internally ballanced? Hence no harmonic dampner crap from a v8? I know that's the case with my d-series..hence why I'm getting the dh-racing 6oz pulley.

here ya go, http://www.unorthodoxracing.com/faq_pulleys.html

Maybe it's biased, I dunno, I kinda believe what they say. If they were causing so many problems, then why the hell would they still be made? Doesn't make sense to me.

 

The pulleys on most of the new import and smaller domestic engines have an elastomer (rubber ring) incorporated into the pulley that looks similar to a harmonic damper. The elastomer in the OEM pulley serves as an isolator, which is there to suppress natural vibration and noise from the engine itself, the A/C compressor, P/S pump, and alternator. This is what the manufacturers call NVH (Noise Vibration & Harshness) when referring to noticeable noise and vibration in the passenger compartment.
-unorthodox racing-

thats what most honda uses.

 

bah! my JDM B16A doesn't have any dampner on the crank pulley... came that way straight from the factory...

 

yeah a few didnt. most b16a first gens, some d15s, and a few other. i didnt say all came dampend.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sohcvtec66 &raquo;</TD></TR><TR><TD CLASS="quote">


actually your wrong..lol


say u have a 90 dx crx with 90hp, with the dual point feul injection,and uswap it with the multi-port fuel injection, you free up a grip of horsepower.

like 13hp </TD></TR></TABLE>

omg, you have no clue what your talking about... thats not freeing up hp...

 

Alright, the crank pulley is behind that giant pulley you guys are calling the crank pulley, its small and is linked directly to the timing belt(duh).

The giant pulley you guys are talking about is more or less the dampener....every car no matter how its balanced needs a crank dampener. It decreases engine vibration that you would feel and internal vibration.

Since our cars run vbelts(even though the same thing applies with serp belts) you need an extra pulley to run your accessories hence the dampener.

Is it really that hard to figure out or take that much to explain???

I can see how it would screw up things like your alternator since it would be spinning at a much faster rate and could burn out the stator/brushes inside the alternator quicker then a normal pulley would.

but other then that it doesnt do much ......basically IMO (which I would usually always take into consideration....haha) underdrive/overdrive pulleys dont do **** unless you have a belt driven blower......

 

lol..dood thats not a dampener its a pulley and having a light one will increase throttle response

 

If you say so.....

 

you're an idiot and should not be allowed to post on this site. i'm sick of stupid people like you that post on things they dont understand. here's a lesson for you, hope you can comprehend this. stock engines are extremely restrictive, as most are not designed for high output, more for driveability. basic airflow boltons such as intake, intake manifold, headers, high flow cat, and cat back systems do not add horsepower, they allow your engine to breathe to its potential, which frees up power. anything that is driven off the crank such as power steering and a/c takes away from an engines potential. properly porting and polishing a head can allow a massive increase in airflow which is another way of freeing up power. if you dont understand basic concepts of horsepower you should learn something before you make a fool out of yourself

 

from reading all the threads here about the dangers of aftermarket crank pulleys, I had an idea for my b16. I wanted to take a sawzall and cut off the powerstering and a/c sections of my pulley then file it down smooth and put it back on.
I dunno if this would work has anyone done this on here?

Sorry for hijacking the thread, I felt it was related and could help solve the issue.