VERY VERY short belt for the track...anyone done this??

blueneonman1 · 05-22-2002, 10:02 PM

I was thinking about next time I got to the track, just putting on a belt which runs the water pump and alt. Anyone tried this? What kind of gains are possible and is it safe?

Tim89LXvert · 05-23-2002, 03:37 PM

You could try that, the tough part would be routing it to keep the CCW rotation of the water pump.

Your best bet might be to run a belt around the alternator, A/C (if not running, it is free-wheeling), WP and crank. That way you bypass the PS and smog.

chris91LX · 05-23-2002, 06:46 PM

Long as you keep the proper rotation on your water pump you'll be fine, like Time89 said. A guy in my club runs a belt like that at the track, bypassing the ps, a/c, and smog. I've seen guys pull the belt alltogether before they run down the strip, that'll give you the best results if you really want a couple tenths. Pull it off right before you run and put it back on the return road. Not my thing, but I've seen several guys do it and get results.

VibrantRedGT · 05-23-2002, 07:46 PM

This may help.

http://www.fordmuscle.com/archives/2...ps/index.shtml

faststang90 · 05-23-2002, 09:10 PM

i run mine like that all the time i have a race crank pulley and a cobras water pump pulley and a small alt pulley it takes a 39 in belt

Mustang_GT_90 · 05-23-2002, 10:06 PM

I run mine like that all the time too, it's worth it. The only thing is on an 87-93, don't know about yours but it should be the same, you have to grind the end off the spring in the idler and put a bolt through the middle of it to let it come around enough to put tension on the belt.

84LX89GT · 05-23-2002, 10:51 PM

Bypassing the PS and Smog will give you the most gains and as long as you keep your air conditioning off, the compressor pulley free wheels because the clutch isn't engaged.
Another thing i've heard of is wiring up a switch that kills the alternator right before you take a pass and you can switch it on at the end of the run and that is like a free 5 hp. The entire resistance of an alternator comes from it being electromagnetically charged when it's charging the battery. a switch on the control circuit side of an added in relay should be easy enough to wire in (wire in so the circuit is normally closed and opens when the relay field is activated). Just an idea.
Good luck,

Edit: sorry Tim89LXvert, i guess i repeated part of what you already said

Coupe5oh · 05-23-2002, 11:40 PM

I know a guy that does the alt kill swich on a carbed car, i wouldnt do it on a efi car. I just ran a shorter belt last nigh at the track, it didnt give me any gain, although i got more wheelspin, but no gain in mph, so i put the belt back on and ran a 14.0003 with a 1.999 60'. with a bog, humidity was bad, the short belt just doesnt work for me, but works for others, maybe if i can get traction, it either spins or boggs, need gears.

PKRWUD · 05-24-2002, 05:18 AM

Quote:

Originally posted by chris91LX
I've seen guys pull the belt alltogether before they run down the strip, that'll give you the best results if you really want a couple tenths. Pull it off right before you run and put it back on the return road.

That is the best answer right there. If a pulley or two mean that much to your time, then do it right and just remove the belt. 10 seconds to get it off, and 10 to get it back on. You don't sacrifice any creature comforts or legally required devices, and you don't have to buy special brackets or belts. Simple, quick, and free. What more could you want?

Take care,
-Chris

sn95gt19 · 05-24-2002, 10:12 AM

I USED TO HAVE AN 89LX, AND I JUST RAN THE BELT SO THE WATER PUMP WAS GOING BACKWARDS, THE CAR STILL RAN VERY COOL, I HAD IT AROUND THE ALT. WP, AND CRANK

05-22-2002, 10:02 PM	#1
blueneonman1 Registered Member Join Date: Mar 2001 Location: Palm Harbor, FL Posts: 208	VERY VERY short belt for the track...anyone done this?? I was thinking about next time I got to the track, just putting on a belt which runs the water pump and alt. Anyone tried this? What kind of gains are possible and is it safe? __________________ Blue Streak - '95 5.0L Mustang GT convertible \| Saleen heat extractor fiberglass hood \| K&N custom CAI \| Taylor Spiro Pros \| Walbro 255lph pump \| Kirban AFPR \| MSD Cap/Rotor/Blaster TFI \| 2 chamber flows w/ dumps \| BBK LTs \| BBK short h-pipe \| No smog or EGR \| NOS 75hp dry kit w/ heater & purge \| Battery in trunk\| Chassis Eng. subframes \| Custom 6-pt rollbar \| King Cobra clutch \| Steeda adj. clutch cable w/ double hook quad. & firewall adj. \| B&M Ripper shifter \| FMS C springs \| Pro3i C/C plates \| Lakewood 70/30 struts \| Comp. Eng. 3-way shocks \| Chassis Eng. LCAs \| Fan switch \| 180* thermo FMS\| Kumho Ecsta 255/40's all around \| Coolest neon lighting on a Mustang EVER! Don't find yourself in front of me...my brakes SUCK! saving up for a complete Cobra package Homepage: http://www16.brinkster.com/blueneonman/ Best 1/4 time: 13.5 @ 101 Best 1/8 time: 8.6 @ 84

05-23-2002, 03:37 PM	#2
Tim89LXvert Registered Member Join Date: Sep 1998 Location: Toledo, Ohio, USA Posts: 269	You could try that, the tough part would be routing it to keep the CCW rotation of the water pump. Your best bet might be to run a belt around the alternator, A/C (if not running, it is free-wheeling), WP and crank. That way you bypass the PS and smog. __________________ 1989 LX Convertible, blue with white top and leather, 5 speed. Engine: GT40 al. heads, Cobra intake, TFS cam, 1.7RR, etc.... LOLDrivetrain: SPEC II clutch & FMS Billet flywheel, Pro 5.0 shifter w/Cobra knob and aluminum driveshaft through 3.73:1 gears.Chassis: 4 wheel disk w/Cobra front brakes, GT rears and 2001 "Bullitt" wheels Rear: MM adjustable LCAs with Griggs springs, KYB shocks. Front: Koni red struts, FMS "C" springs and full poly bushings. Full length MM sub frame connectors, steeda 2pt. K-brace.Misc.: 130a alt. upgrade, R134a conversion. Photos of my car

05-23-2002, 07:46 PM	#4
VibrantRedGT Registered Member Join Date: Jun 2000 Location: Boca Raton, FL Posts: 17	This may help. http://www.fordmuscle.com/archives/2...ps/index.shtml __________________ 1994GT-Vibrant Red, FRPP GT-40X Heads, Scorpion 1.7 Roller Rockers, Crower 15511 Cam, Edelbrock RPM Intake, BBK 70MM Throttle Body, Pro-M 77MM Mass Air, FRPP 24# Injectors, Kirban Fuel Pressure Reg., MAC 1 5/8 Long Tubes, MAC Prochamber, MAC Cat Back, March Pulleys, FRPP 3:55 gears, FRPP Aluminum Driveshaft, FRPP King Cobra Clutch, Steeda Upper/Lower Control Arms, Steeda G-Trac Bar, Steeda Strut Tower Brace, Steeda Sub Frames, Steeda Caster/Camber Plates, FRPP 5300-C Srings, Auto Meter Fuel Pressure/Water Temp Guages and alot more.

05-23-2002, 09:10 PM	#5
faststang90 Registered Member Join Date: May 2001 Location: baytown,tx,us Posts: 128	belt size i run mine like that all the time i have a race crank pulley and a cobras water pump pulley and a small alt pulley it takes a 39 in belt

05-23-2002, 10:06 PM	#6
Mustang_GT_90 Registered Member Join Date: Apr 2002 Posts: 68	I run mine like that all the time too, it's worth it. The only thing is on an 87-93, don't know about yours but it should be the same, you have to grind the end off the spring in the idler and put a bolt through the middle of it to let it come around enough to put tension on the belt. __________________ 90 Mustang, full weight, 5 speed, pulleys, 3.73 gears... 13.33@101 mph on stock motor and DOT's 12.44@112.5 on the juice. Check out our clubs website at http://www.stanggang.com

05-23-2002, 06:46 PM	#3
chris91LX Registered Member Join Date: Oct 1998 Location: Suburban Chicago, Hanover Park Posts: 695	Long as you keep the proper rotation on your water pump you'll be fine, like Time89 said. A guy in my club runs a belt like that at the track, bypassing the ps, a/c, and smog. I've seen guys pull the belt alltogether before they run down the strip, that'll give you the best results if you really want a couple tenths. Pull it off right before you run and put it back on the return road. Not my thing, but I've seen several guys do it and get results.

05-23-2002, 10:51 PM	#7
84LX89GT Mustangs Join Date: Jul 2000 Posts: 1,938	Bypassing the PS and Smog will give you the most gains and as long as you keep your air conditioning off, the compressor pulley free wheels because the clutch isn't engaged. Another thing i've heard of is wiring up a switch that kills the alternator right before you take a pass and you can switch it on at the end of the run and that is like a free 5 hp. The entire resistance of an alternator comes from it being electromagnetically charged when it's charging the battery. a switch on the control circuit side of an added in relay should be easy enough to wire in (wire in so the circuit is normally closed and opens when the relay field is activated). Just an idea. Good luck, Edit: sorry Tim89LXvert, i guess i repeated part of what you already said __________________ 2005 Suzuki Hayabusa GSX1300-R 1980 Ford Thunderbird - 255 V8 ported heads, 5.0L ported stock headers, O.R. H-pipe and Flowmaster 2-chambers, dual roller timing chain hi-po Mack Truck hood emblem 1985 Mustang GT 5.0L T5, F-303, GT40p, headers, off-road h, flowmasters, MSD stuff, etc. Sold 02/06/04 1989 Mustang GT ET: 13.304@102.29 mph (5-24-03) Sold - 1998 Mustang Cobra coupe, 1/4 mile - street tires: 13.843@103.41 (bone stock)

05-23-2002, 11:40 PM	#8
Coupe5oh Registered Member Join Date: Nov 2001 Location: SanAntonio, Tx Posts: 734	I know a guy that does the alt kill swich on a carbed car, i wouldnt do it on a efi car. I just ran a shorter belt last nigh at the track, it didnt give me any gain, although i got more wheelspin, but no gain in mph, so i put the belt back on and ran a 14.0003 with a 1.999 60'. with a bog, humidity was bad, the short belt just doesnt work for me, but works for others, maybe if i can get traction, it either spins or boggs, need gears. __________________ Police package 5spd 90 Lx, Stock original motor, 3.27grs, BM fan, fms 10.5 clutch, D&D quadrant, and adjuster, ADS chip, 180 stat, mac cai, mac h-pipe, mac subframe connectors, ASP crank pulley, ripper shifter, 26x10.5 M/T sport pros welds. 246 hp according to analyzer Race weight: 3,120 E.t-13.57 with 26x10.50's e.t. streets. 1.88 60' mph- 99.92 mph

05-24-2002, 10:12 AM	#10
sn95gt19 motors done......woohooo Join Date: Mar 2002 Posts: 799	I USED TO HAVE AN 89LX, AND I JUST RAN THE BELT SO THE WATER PUMP WAS GOING BACKWARDS, THE CAR STILL RAN VERY COOL, I HAD IT AROUND THE ALT. WP, AND CRANK __________________ 95gt lazer red (98 cobra clone) Rice Haters Club Member #116

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
short belt	stanger9219	Windsor Power	2	03-12-2004 09:46 PM
short belt	89droptop	Windsor Power	2	11-20-2002 04:20 PM
No Serpentine Belt For A Run Down The Track... Ever Tried This???	BowTie Eater 5 Liter	Windsor Power	15	11-24-2001 01:22 AM
power steering delete and short belt routing?	matt cook	Windsor Power	4	05-12-2001 07:54 PM
Short Belt Question.	MrGtStang	Windsor Power	1	02-18-2001 09:27 PM