Underdrive pulleys for street racing

SMoKEDya95Stang · 10-29-2002, 11:41 PM

Hey,

I am selling a set of Underdrive Pulleys.
I really need the money, my car got into accident.
They are BRAND NEW/NEVER BEEN USED.
Hypertech Power pulleys
Includes Crank Pulley, and Alternator Pulley
about a 5-10 HP boost! A big boost in torque also.
No need to buy a belt, hypertech pulleys use stock belt!
please check it out,
Fits only 1994-98 Mustangs v6!! 3.8L

http://cgi.ebay.com/ebaymotors/ws/eB...871538203&rd=1

Thank you!

Skyman · 10-31-2002, 06:23 PM

Will mah 3.8L stang haulz *** with thoze pullies man?

SMoKEDya95Stang · 10-31-2002, 09:04 PM

you will def. Notice a boost in your acceleration and torque. Like i said it gives you 5-10 horses. some other time down the line you can buy a asp water pump pulley (you can get them for like 20 bucks shipping usually..) and get a better boost, but only by 2 horses.. But its better than nothing. Now its gonna take alot of parts and money to get ur stang really fast but if ur 3.8 is stock then u will notice the power that a underdrive pulley gives u

MidNiteBlu 5.0 · 10-31-2002, 10:29 PM

Quote:

Originally posted by Skyman
Will mah 3.8L stang haulz *** with thoze pullies man?

LMAO!!!

So if they are street racing, I cant use them at the track?

ItzDaLexus300 · 10-31-2002, 10:36 PM

One thing to know about underdrive pulleys. Underdrive crank pulleys do not have harmonic dampners, which is what you replace when you put it on. there relaly isnt any danger but its something worth knowing.

SMoKEDya95Stang · 10-31-2002, 11:04 PM

They are for street racing, track use, anything. They are simple underdrive pulleys.
They Merly give your car more HP and torque and it is very noticable, from driving a stock car and adding pulleys. They increase ur accelartion. Its not a miricle thing or anyhting to get ur car to haul ***, you really need to invest a **** load of money, porting and polishing intakes, forced intake, cai, exhaust. But if u want your car to haul is..... everyone starts with new pulleys. Its an essential.

[QUOTE]
One thing to know about underdrive pulleys. Underdrive crank pulleys do not have harmonic dampners, which is what you replace when you put it on. there relaly isnt any danger but its something worth knowing.

about what you said.

That isnt true. THese pulleys are for a 94-98 mustang. THey do not change the harmoic dampner. That is for the 99+ boyz.
But even if you do there isnt any harm there.
Infact installation with the harmonic damper really isnt difficult.
But installation on these years is easier.

Got a question about anything, installation the pulleys whatever
go head and email me. If ur interested on these pulleys go a head and bid, or email me.
thanks.

Hellbentmatrix@juno.com
or the aution.

http://cgi.ebay.com/ebaymotors/ws/eB...ADME:B:LC:MT:1

typeR · 10-31-2002, 11:26 PM

TVD...HB it's still alittle mix of vodoo to me...do todays modern engines need this 8+lb of rotational mass to slow the spooling of the engine or is a tortional vibration damper an essential process required to keep resonance from tearing the bearings apart in the bottom end? let;s ask mr owl
or harmonic balancer ,is it just to reduce engine noise from making its way into the cabin...the world may never know

SMoKEDya95Stang · 11-01-2002, 12:15 AM

Harmonic dampers (aka harmonic balancers) are found on all Ford 90 degree V6 and V8 engines, so far as I know. They consist of a two cast iron discs with some kind of elastomer sandwiched between them, and they are mounted on the front end of the crankshaft to dampen or balance out crankshaft vibrations that occur at certain frequencies and rpm's. It suttles out the sound and the cars sound and vibrations inside of the car.

All of our 3.8L V6 engines have a harmonic balancer. On the 94-98 engines, the crank pulley bolts to the front of the harmonic balancer. On 99+ cars, Ford made the harmonic balancer and crank pulley one piece.

So. if you put an underdrive pully on a 94-98 car, all you have to do is remove the old crank pulleyand bolt on a new one. To put an underdrive pulleyon a 99+ car, you have to replace both the harmonic balancer and the crank pulley.

UD pulleys reduce the speed of accessories relative to the crankshaft speed. Therefore increasing horsepower, torque and gas mileage, and by turning the accessories slower, extend their life. Some people say that using UD pulleys isnt good for your car cause it takes some power away from your accesories.
Well The amount of power that it absourbes from your accesories really isnt that much. It wont harm your accesories in anyway.
It prolongs the life of them, ask people who have ud pulleys in there car they will tell you the dont see any difference in the way their ac works, heat, power steering, ect.

hope this helps

typeR · 11-01-2002, 12:24 AM

the gains in an undrive pulley set has very little to do with undriving the accessories and almost all to do with the dramatic weight difference... my crank pulley was 8lbs heavier than the light weight aluminum one i bought and am choosing not to install eventhough it has been dyno proven to provide 10/10 in my car and probablly much much more below where a dyno jet can measure....the concerne is the resonance effet on the crank it self ...skyscrappers use HB/TVD's to diminish harmonics that could literally rip a building to shreds in its absense...if steve saleen came on told me why the absence of the hb/tvd isnt a problem and only really effect cabin noise id be all over it but as it stands the best testiment agaisnt it comes to me from a company called AEM they have this civic draggster running low 8's and it has the o.e. crank pulley...also they make pulleys but not crank pulleys just accessory pulleys

The Deuce · 11-01-2002, 12:50 AM

Quote:

Originally posted by Skyman
Will mah 3.8L stang haulz *** with thoze pullies man?

Sky, you are one mean dude. That went waaaaaay over his head.

SMoKEDya95Stang · 11-01-2002, 01:26 PM

Actually Underdriving the accesories has everythign to do with "underdrive" pulleys....
Its the whole point of it. Yes less weight is a good quality. But think of it this way.
A smaller pulley will take Less revolutions, to crank the crankshaft
THAN a Larger pulley.

Also by that it underdrives other accesories. It "robs"
needed power from accesories that able to speed of the pulley to be faster.
Removing a HB is a bad thing
if you do that your crankshaft life will be diminished they are there for a reason....

typeR · 11-01-2002, 02:17 PM

about 2% of the gains from the typical UD pulleys are derived from underdriving the accessories the rest come the dramtic decrease in rotational mass...like a light weight fly wheel or light weight wheels...

89mustanglx · 11-05-2002, 02:35 AM

Will these underdrive my blinkers as well? I'd buy them right now if they came with new muffler berings.

Smiff

SMoKEDya95Stang · 11-05-2002, 10:54 AM

...no they dont effect that..

10-29-2002, 11:41 PM	#1
SMoKEDya95Stang Registered Member Join Date: Oct 2002 Posts: 15	Underdrive pulleys for street racing Hey, I am selling a set of Underdrive Pulleys. I really need the money, my car got into accident. They are BRAND NEW/NEVER BEEN USED. Hypertech Power pulleys Includes Crank Pulley, and Alternator Pulley about a 5-10 HP boost! A big boost in torque also. No need to buy a belt, hypertech pulleys use stock belt! please check it out, Fits only 1994-98 Mustangs v6!! 3.8L http://cgi.ebay.com/ebaymotors/ws/eB...871538203&rd=1 Thank you!

10-31-2002, 06:23 PM	#2
Skyman I need 110mph Trap Speed! Join Date: Feb 1999 Location: So, CA Posts: 4,315	Will mah 3.8L stang haulz * with thoze pullies man? __________________ 2001 BMW M3 6spd 12.79@108 RIP ---- 1993 Notch w/ 98 4V 4.6 Fasttt... -1989 Saleen Mustang #406- 12.32@109 -1999 Black Cobra Coupe-** JBA Shorties, Bassani Cat-X, Magnaflow 3", Pulleys, 85mm Pro-M, Ported Intake, Soild Rear w/ 4.30s, Tubular Front End, X2C arms, 13lb batt, few others.

10-31-2002, 10:36 PM	#5
ItzDaLexus300 Registered Member Join Date: Oct 2002 Location: Nebraska Posts: 55	One thing to know about underdrive pulleys. Underdrive crank pulleys do not have harmonic dampners, which is what you replace when you put it on. there relaly isnt any danger but its something worth knowing. __________________ Proveyer of everything Different. 1996 SC300 5spd ~"Some Mods" cough 1987 Pontiac Fiero Project. Ask for Details

10-31-2002, 11:26 PM	#7
typeR Registered Member Join Date: Nov 2001 Posts: 111	TVD...HB it's still alittle mix of vodoo to me...do todays modern engines need this 8+lb of rotational mass to slow the spooling of the engine or is a tortional vibration damper an essential process required to keep resonance from tearing the bearings apart in the bottom end? let;s ask mr owl or harmonic balancer ,is it just to reduce engine noise from making its way into the cabin...the world may never know __________________ '01 acura CL-S 260/232 (stock) 2500$ 3.5L short block 299$ cai 10 whp 299$ lowered 1.0/1.25 999$ headers 30 whp look on there face...pricless PB 1/4 13.794@101.54

11-01-2002, 12:24 AM	#9
typeR Registered Member Join Date: Nov 2001 Posts: 111	the gains in an undrive pulley set has very little to do with undriving the accessories and almost all to do with the dramatic weight difference... my crank pulley was 8lbs heavier than the light weight aluminum one i bought and am choosing not to install eventhough it has been dyno proven to provide 10/10 in my car and probablly much much more below where a dyno jet can measure....the concerne is the resonance effet on the crank it self ...skyscrappers use HB/TVD's to diminish harmonics that could literally rip a building to shreds in its absense...if steve saleen came on told me why the absence of the hb/tvd isnt a problem and only really effect cabin noise id be all over it but as it stands the best testiment agaisnt it comes to me from a company called AEM they have this civic draggster running low 8's and it has the o.e. crank pulley...also they make pulleys but not crank pulleys just accessory pulleys __________________ '01 acura CL-S 260/232 (stock) 2500$ 3.5L short block 299$ cai 10 whp 299$ lowered 1.0/1.25 999$ headers 30 whp look on there face...pricless PB 1/4 13.794@101.54

10-31-2002, 09:04 PM	#3
SMoKEDya95Stang Registered Member Join Date: Oct 2002 Posts: 15	you will def. Notice a boost in your acceleration and torque. Like i said it gives you 5-10 horses. some other time down the line you can buy a asp water pump pulley (you can get them for like 20 bucks shipping usually..) and get a better boost, but only by 2 horses.. But its better than nothing. Now its gonna take alot of parts and money to get ur stang really fast but if ur 3.8 is stock then u will notice the power that a underdrive pulley gives u

10-31-2002, 11:04 PM	#6
SMoKEDya95Stang Registered Member Join Date: Oct 2002 Posts: 15	They are for street racing, track use, anything. They are simple underdrive pulleys. They Merly give your car more HP and torque and it is very noticable, from driving a stock car and adding pulleys. They increase ur accelartion. Its not a miricle thing or anyhting to get ur car to haul *, you really need to invest a ** load of money, porting and polishing intakes, forced intake, cai, exhaust. But if u want your car to haul is..... everyone starts with new pulleys. Its an essential. [QUOTE] One thing to know about underdrive pulleys. Underdrive crank pulleys do not have harmonic dampners, which is what you replace when you put it on. there relaly isnt any danger but its something worth knowing. about what you said. That isnt true. THese pulleys are for a 94-98 mustang. THey do not change the harmoic dampner. That is for the 99+ boyz. But even if you do there isnt any harm there. Infact installation with the harmonic damper really isnt difficult. But installation on these years is easier. Got a question about anything, installation the pulleys whatever go head and email me. If ur interested on these pulleys go a head and bid, or email me. thanks. Hellbentmatrix@juno.com or the aution. http://cgi.ebay.com/ebaymotors/ws/eB...ADME:B:LC:MT:1

11-01-2002, 12:15 AM	#8
SMoKEDya95Stang Registered Member Join Date: Oct 2002 Posts: 15	Harmonic dampers (aka harmonic balancers) are found on all Ford 90 degree V6 and V8 engines, so far as I know. They consist of a two cast iron discs with some kind of elastomer sandwiched between them, and they are mounted on the front end of the crankshaft to dampen or balance out crankshaft vibrations that occur at certain frequencies and rpm's. It suttles out the sound and the cars sound and vibrations inside of the car. All of our 3.8L V6 engines have a harmonic balancer. On the 94-98 engines, the crank pulley bolts to the front of the harmonic balancer. On 99+ cars, Ford made the harmonic balancer and crank pulley one piece. So. if you put an underdrive pully on a 94-98 car, all you have to do is remove the old crank pulleyand bolt on a new one. To put an underdrive pulleyon a 99+ car, you have to replace both the harmonic balancer and the crank pulley. UD pulleys reduce the speed of accessories relative to the crankshaft speed. Therefore increasing horsepower, torque and gas mileage, and by turning the accessories slower, extend their life. Some people say that using UD pulleys isnt good for your car cause it takes some power away from your accesories. Well The amount of power that it absourbes from your accesories really isnt that much. It wont harm your accesories in anyway. It prolongs the life of them, ask people who have ud pulleys in there car they will tell you the dont see any difference in the way their ac works, heat, power steering, ect. hope this helps

11-01-2002, 01:26 PM	#11
SMoKEDya95Stang Registered Member Join Date: Oct 2002 Posts: 15	Actually Underdriving the accesories has everythign to do with "underdrive" pulleys.... Its the whole point of it. Yes less weight is a good quality. But think of it this way. A smaller pulley will take Less revolutions, to crank the crankshaft THAN a Larger pulley. Also by that it underdrives other accesories. It "robs" needed power from accesories that able to speed of the pulley to be faster. Removing a HB is a bad thing if you do that your crankshaft life will be diminished they are there for a reason....

11-01-2002, 02:17 PM	#12
typeR Registered Member Join Date: Nov 2001 Posts: 111	about 2% of the gains from the typical UD pulleys are derived from underdriving the accessories the rest come the dramtic decrease in rotational mass...like a light weight fly wheel or light weight wheels... __________________ '01 acura CL-S 260/232 (stock) 2500$ 3.5L short block 299$ cai 10 whp 299$ lowered 1.0/1.25 999$ headers 30 whp look on there face...pricless PB 1/4 13.794@101.54

11-05-2002, 02:35 AM	#13
89mustanglx Registered Member Join Date: Dec 2000 Location: Rockmart GA usa Posts: 24	Will these underdrive my blinkers as well? I'd buy them right now if they came with new muffler berings. Smiff __________________ 89 mustang lx 350 4 bolt main balanced neutral (barnette perf) Edelbrock Performer rpm heads Weiand 6-71 blower Super powershot nitrous plate kit (lots of other odds n ends) 442 rwhp (no NAWWZZZ) 512 rwtq (no NAWWWWWZZZZZ))

11-05-2002, 10:54 AM	#14
SMoKEDya95Stang Registered Member Join Date: Oct 2002 Posts: 15	...no they dont effect that..

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