jconnway Posted September 7, 2011 Report Share Posted September 7, 2011 (edited) Just what the title says. My pulley underdrives about 10 percent. It's a smaller pulley though so can a h/o run off that? EDIT: I obviously mean Alternator in the title, not amplifier. I was posting on my phone, I guess I wasn't paying attention Edited September 7, 2011 by jconnway Quote Full Pioneer Build 4 Per Door - Front Door Build Up Link to comment Share on other sites More sharing options...
Dan2427 Posted September 7, 2011 Report Share Posted September 7, 2011 If you mean alt instead of amp, then yes you can although mine squeals awfully towards redline and I know its not belt slip. I have an underdrive on mine because my alt is just a POS rewound. Quote 2003 GMC Yukon Denali Alpine CDA 117 Redoing Mids/Highs 4 Runs of 1/0 Knukonceptz 2+, 2- 4 Deka 9A31's in back (Stock underhood) 250 amp Alt. AQ20K 2 18" Crossfire XS V.2's 12 cubes 33hz 149sq inches of port! Link to comment Share on other sites More sharing options...
Never Satisfied Posted September 7, 2011 Report Share Posted September 7, 2011 I don't see why not I run smaller on just about all the installs I do... Never had a come back for a bad alt... Quote If you are ever satisfied, sounds like you gave up... Never Satisfied ~Team Ns~ Link to comment Share on other sites More sharing options...
zx10intn Posted September 7, 2011 Report Share Posted September 7, 2011 why would you want to run an alt on an underdrive pulley? turning it slower would be the last thing i would want it to do Quote 1969 Chevy Chevelle 20/22" staggered Bonspeed Huntingtons wrapped in Nitto INVO's Mechman 250amp cs144 alt w/AVBM Kinetik 1800 main battery/Kinetik 2400 in the trunk Pioneer AVH-3200dvd Headunit (2) sets of Hybrid Audio Technologies Imagine components up front (2) DD 3512's d4 coils Sundown sax100.4 component amp Sundown saz-3000d subwoofer amp 5ft^3 box tuned to 34hz MY BUILD Link to comment Share on other sites More sharing options...
jconnway Posted September 7, 2011 Author Report Share Posted September 7, 2011 why would you want to run an alt on an underdrive pulley? turning it slower would be the last thing i would want it to do Well thats what I'm asking. I have the stock alt on now with no voltage drop and sparse upgrades (Big 3). I am even running a stock battery, and at full tilt, there is almost no drop. However, my system isn't very powerful at the moment but I did come across these underdrive pulleys by unorthodox racing for my accord. I'd like to get a little extra power out of her, because the K24 is quite an engine when its worked. I just was curious about the possibility of a bigger alt on a smaller pulley. Quote Full Pioneer Build 4 Per Door - Front Door Build Up Link to comment Share on other sites More sharing options...
zx10intn Posted September 7, 2011 Report Share Posted September 7, 2011 why would you want to run an alt on an underdrive pulley? turning it slower would be the last thing i would want it to do Well thats what I'm asking. I have the stock alt on now with no voltage drop and sparse upgrades (Big 3). I am even running a stock battery, and at full tilt, there is almost no drop. However, my system isn't very powerful at the moment but I did come across these underdrive pulleys by unorthodox racing for my accord. I'd like to get a little extra power out of her, because the K24 is quite an engine when its worked. I just was curious about the possibility of a bigger alt on a smaller pulley. i see what you are saying now, but you have it all wrong. an underdrive pulley will turn the alt slower, resulting in less power being made, what you are wanting is an overdrive pulley to turn it faster Quote 1969 Chevy Chevelle 20/22" staggered Bonspeed Huntingtons wrapped in Nitto INVO's Mechman 250amp cs144 alt w/AVBM Kinetik 1800 main battery/Kinetik 2400 in the trunk Pioneer AVH-3200dvd Headunit (2) sets of Hybrid Audio Technologies Imagine components up front (2) DD 3512's d4 coils Sundown sax100.4 component amp Sundown saz-3000d subwoofer amp 5ft^3 box tuned to 34hz MY BUILD Link to comment Share on other sites More sharing options...
6berry Posted September 7, 2011 Report Share Posted September 7, 2011 why would you want to run an alt on an underdrive pulley? turning it slower would be the last thing i would want it to do Well thats what I'm asking. I have the stock alt on now with no voltage drop and sparse upgrades (Big 3). I am even running a stock battery, and at full tilt, there is almost no drop. However, my system isn't very powerful at the moment but I did come across these underdrive pulleys by unorthodox racing for my accord. I'd like to get a little extra power out of her, because the K24 is quite an engine when its worked. I just was curious about the possibility of a bigger alt on a smaller pulley. i see what you are saying now, but you have it all wrong. an underdrive pulley will turn the alt slower, resulting in less power being made, what you are wanting is an overdrive pulley to turn it faster i believe what hes saying is he wants to get an UNDERdrive pulley to get a little more power out of his engine and hes asking if it will affect the output of his alternator. the answer would be yes it will affect your idle output but probably not by very much. and maybe it would be possible to get an overdrive pulley for your alt to counteract the underdrive pulley on the crank Quote 1999 Audi A4 1.8T::: 4 - DC Level 3 10's in a 4th order Rockford P6002 on Subs for now (3-3.5k coming eventually) MB Quart ONX4.60 for Mids and Highs Boston S50 Components in Front Boston S65 Coaxials in Rear 40 Sq Ft of Second Skin Damplifier Build Thread UBL 1948 Plymouth Link to comment Share on other sites More sharing options...
jconnway Posted September 7, 2011 Author Report Share Posted September 7, 2011 6Berry - you got it. zx10intn - you have a nice ass chevelle bud. and yeah, your right, I know what they do, I was just talking about counteracting the affect of a minor underdrive on the alt pulley. I tend to lean towards what 6berry said here though. I don't seem to have any kind of change at all as far as voltage goes with these underdrive pulleys. The dyno results for this exact pulley is +8 hp so it seems like a good investment. Quote Full Pioneer Build 4 Per Door - Front Door Build Up Link to comment Share on other sites More sharing options...
GSanders17 Posted September 7, 2011 Report Share Posted September 7, 2011 That K24 is capable of alot! I wish I had the money to buy a K series for my Civic. Quote Link to comment Share on other sites More sharing options...
Dan2427 Posted September 7, 2011 Report Share Posted September 7, 2011 Oh my bad maybe I have an overdrive pulley haha. Quote 2003 GMC Yukon Denali Alpine CDA 117 Redoing Mids/Highs 4 Runs of 1/0 Knukonceptz 2+, 2- 4 Deka 9A31's in back (Stock underhood) 250 amp Alt. AQ20K 2 18" Crossfire XS V.2's 12 cubes 33hz 149sq inches of port! Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.