pulleys.. underdrive vs overdrive and risk factors?
09-15-2009, 10:33 AM
#1
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pulleys.. underdrive vs overdrive and risk factors?
okay so i read the NA KA build for 200hp cheap and was thinking on doing something similar. Though I don't mind putting in more money. I always read about pulleys being the biggest bang for your bucks and stuff like that. Now what are underdrive and overdrive pulleys? Differences, pros, cons, risk factors? Yeah i was reading up as i was looking into more information and people are saying its not good for engine life and things as such. Though they were talking about Hondas, figure it probably applies to all engines. Be great if someone could get back to me on this b4 i make a decision. Oh yeah and what all goes into installing the pulleys and all cuz i'd like to know so i can be ready to pay the shop or something. Oh and an estimated price on shop installing would be nice too. Thanks.
09-15-2009, 12:50 PM
#3
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Why do so many people think you can get these poor little engines up to "big boy" numbers on the sly when going NA?
You want big NA power, go with a bigger engine, otherwise, boost is going to be the only way to "save" money and make power.
-Dave
You want big NA power, go with a bigger engine, otherwise, boost is going to be the only way to "save" money and make power.
-Dave
09-15-2009, 09:22 PM
#9
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okay sorry for the debate, uhmmm i just wanted to know more about pulleys really not saying im going to 200hp cheap... n i mean more so affordable... but i just want some upgrade tips on NA so im asking about pulleys to get some knowledge
09-15-2009, 10:45 PM
#10
09-16-2009, 03:09 AM
#11
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Underdrive is when the crank pulley is slightly smaller in diameter and because of such the accesories, alternator ps pump etc don't turn quite as fast. The pulley is also made of a lighter material usually aluminum, to reduce rotating mass for better performance. Overdrive pulleys would do the opposite, but could still be made lighter and just run the accesories faster.
Someone thank me for getting this thread back on track lol.
Someone thank me for getting this thread back on track lol.
09-16-2009, 08:07 AM
#13
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Cool beans, thanks. Now what is better out of the 2 and risk factors. Is it even worth an upgrade? I know forced induction is what everyone is saying to go for but don't got that kind of money yet. Just wanted simple upgrades.
09-16-2009, 09:02 AM
#14
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Do you want cheap bolt-ons or do you want HP numbers?
Cheap bolt-ons will NOT . . . and I repeat will NOT give you even marginal gains.
You are looking at 2-2.5 inch exhaust from the headers back, cold-air intake, and underdrive pulleys as your best bet.
The ONLY reason you would want an OVERDRIVE pulley is if you're attempting to run some CRAZY sound system and your UPGRADED alternator and ultra thick wiring with capacitors isn't quite doing the job for you. Basically, overdrive pulleys will not give you performance gains, if anything, they'll become more parasitic.
NOW!
You mentioned 200hp, not possible with what you're talking about. You're not going to get 200hp, NA on a KA without some serious and seriously expensive work. So go ahead and get that out of your brain.
Now, if you're talking about 140-150whp, then you can get setup with what I mentioned above (intake, exhaust, pulley and maybe even a chip).
If you want AFFORDABLE horsepower that will not kill your bank and give you bang-for-the-buck . . .boosting your KA is the way to go.
-Dave