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LT1 underdrive Pulley Posted By: 633997 On: 01-03-2008 @ 16:50:31 Reply | Edit Hey I was curiose about the underdrive pullies out there for LT1's because it seems to be hp for cheap some go for under $100.But some have more underdrive than others so my question is how much underdrive should it have if it will be installed on a car that still has to run a/c,radio etc...to maintain charging characteristics? -- 1995 Camaro Z28 LT1 350, T-Top, SunBurst Orange Metallic Paint,17" Hypersilver Z06 style Corvette wheels,CAI,SLP LOUD MOUTH RESONATOR,SLP FLOW BOOSTER, Hypertech 160 degree Thermostat,and Hypertech Tunning.soon to come: Pacesetter Mid-Lenght Headers and a Granatelli Hi-Flow MAF sensor. Email AG081463@yahoo.com Posted By: davidr On: 09-18-2007 @ 21:56:42 Reply | Top | Edit Go to summit , they sell pulleys that will do the trick and keep everything else running normally . -- 
95 Z28 purchased new . c.a.i. trick flow elbow ,58mm t-body and ported manifold . hypertech power program , crane springs and crane gold 1.6 rollers . 3 inch exhaust no cat , bbk headers and MSD wires and Iridium plugs . Also an Edelbrock 3 point strut tower brace . Posted By: my95Z28 On: 09-18-2007 @ 23:29:49 Reply | Top | Edit Do a search. I think you'll find just as many problems as you'll find people that are happy with it. I haven't read enough positive evidence to convince me that it is a worthwhile mod. -- 
1995 Z28 M6 - SLP CAI w/Vortech elbow, Moser 12-Bolt (3.73 w/Truetrac posi), Spohn (Swaybars, Adj. Panhard, LCAs w/relo bracket, Adj. Torque Arm), BMR (STB and SFCs), B&M Ripper Shifter, ZR1 Wheels, Bilstein/Eibach SLP shock/spring Kit, Baer GT+ Posted By: Injuneer On: 09-19-2007 @ 06:45:06 Reply | Top | Edit You can't believe everything you read. The HP claims are always ridiculously overstated, and generally don't reflect the fact that unlike most engines, the LT1 has a gear driven water pump, not a belt driven pump. Dyno test on an LT1: http://www.ws6.com/mod-2.htm I had the ASP 25% integrated damper/pulley and 15% U/D alternator pulley, and the charging system would not keep the battery voltage up at 800 RPM idle, with any sort of load on the system - A/C, brake light, headlights, etc. You can spend extra and get the March "power & amp" setup with the over-drive alternator pulley, but then you give up some of the 0.7 peak HP shown in the dyno test. Not worth the aggrevation. -- 
Fred - 1994 Formula - 381ci / 275-shot N2O / TH400+GV Mods: http://members.aol.com/InjuneerZZ/Mod.htm Step into my office: http://www.injuneer.com/images/photos/Interior/DCP03464a.jpg Posted By: rob69zombie On: 01-23-2009 @ 18:01:30 Reply | Top | Edit  My Caps Lock Button Is Broken -- 
97 Red Z28 M6- Hooker Super Comp LT's, SLP 2OTL catback, CAI, 315's> 13.41 @102 95 Red Z28 A4- Flowmaster, 3.73's, Hypertech Tuned (Wife's Car) Posted By: RoAdRaGe912 On: 01-23-2009 @ 20:34:42 Reply | Top | Edit listen here you humongous sig having, thread grave digging mofo...... Quit it!! 
If you're going to dig up an old BS thread, at least ask a stupid question or something. --  Posted By: ishdiddy On: 01-25-2009 @ 16:00:03 Reply | Top | Edit the dyno is only for the crank pulley there is a difference when you put the alternator pulley on along with it. Posted By: jcraftz28 On: 01-29-2009 @ 07:53:22 Reply | Top | Edit spend your money on something else like a lt4 knock module or a line lock there always fun!! --  
1994 camaro z28 M6, 130k miles/http://www.cardomain.com/ride/2459821/ flowmaster, bbk headers, Moroso cold air intake, bbk throttle body 58 mm, Richmond 3.73 gear,MSD Ignition, MSD coil, no air pump, no cat, alum. driveshaft, drilled and slotted rotors... Posted By: 87bandit On: 02-01-2009 @ 11:29:55 Reply | Top | Edit ancient thread! -- 
1994 Trans Am GT A4 - NOS Dry Kit, CC503, Comp 1.6 Magnum Rockers, K&N FIPK CAI, Trick Flow Elbow, 58mm TB, TP Built 4L60e, 3000 Stall, B&M Tranny Cooler, Pacesetter Midlength Headers, !EGR, !CAT, Cutout, Magnaflow Catback, M/T ET Streets, 30# SVO Injectors, Walbro 255lph, NGK TR6 Plugs, MSD 8.5mm Wires, Hypertech 160 Thermo, Manual Fan Switch, TB Bypass, LT4 KM, MAF Descreen, !Front Sway Bar, BMR Rear LCAs, MAC SFCs, Comp Engineering 3-way Adjustable Shocks, Energy Suspension Polyurethane Trans Mount, 3.73 gears Best Time: 7.56 @ 91.14mph (stock cam, stock tune, shitty tires)
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