Underdrive Pulleys

fastford3388 · March 29th, 2007, 05:48 PM

I've got an '89 GT and I was wondering if anyone can give me a suggestion for a set of underdrive pullies. I want a little horsepower gain (10-20) but It will still have to be able to drive on a daily baisis. I see there are alot of different brands out there: BBK, summit, trickflow, JET... the list goes on... I really don't care if they look pretty, i see some come in billit aluminum, I was just wondering what I can get the most bang for my buck out of...

thanks,
Mike

homebrewed · March 29th, 2007, 05:51 PM

I got some BBK's on my '91. Its a DD w/ a 306. Runs fine.

FYI: If you have plans for a supercharger down the road, keep the stock pullys. The different diameters plays hell w/ 'em...

87foxbodylx · March 29th, 2007, 07:00 PM

BBK's here too. Keep your stock pullies just incase you wanna go blow through like home said.

cobraetti · March 29th, 2007, 07:00 PM

BBK worked for me. However I recommend keeping the stock alternator pulley in use do to charging difficulties. Anyone else found this to be true?

87foxbodylx · March 29th, 2007, 07:03 PM

Originally Posted by 89 ragtop

BBK worked for me. However I recommend keeping the stock alternator pulley in use do to charging difficulties. Anyone else found this to be true?

only thing i had problems with was when my car sat for months period of time over the winter (3 months) other then that I haven't had any problems at all. Is your belt slipping by chance?

Edit: the only reason my battery would die, was because there was a draw from my stereo.

Tony_90fox · March 29th, 2007, 07:07 PM

Mine is fine...I have all my accesories running and it charges fine.

GTXRacing · March 29th, 2007, 07:08 PM

BBK's here as well but not for long

stang94 · March 29th, 2007, 08:44 PM

Originally Posted by GTXRacing

BBK's here as well but not for long

Are you getting a better one?
What name?

fastford3388 · March 29th, 2007, 10:23 PM

Has anyone here tried March pullies? I found them to be moderately priced and they claim a 12.5 to 15 HP gain. can anyone deem this true?

95wip · March 30th, 2007, 12:47 AM

i am also looking into U/D pullys Can you really notice that much of a difference on a stock motor w/headers...i was told by the guy at the speed shop they werent worth the money very minimal gains..

homebrewed · March 30th, 2007, 12:52 AM

Like most upgrades, they will work better in conjuction w/ other mods... Besides a S/C. Like Tony, I have never had a charging problem w/ them.

Tony_90fox · March 30th, 2007, 01:06 AM

Originally Posted by 95wip

i am also looking into U/D pullys Can you really notice that much of a difference on a stock motor w/headers...i was told by the guy at the speed shop they werent worth the money very minimal gains..

I noticed a torque gain...Seemed like i could spin the tires a bit better. Remember i have a stock aod. I got mine for a GREAT deal at a swap meet. Almost free and they were new! I would say that if your car is stock, go for gears instead...I like my pullies, but gears will get you off the line and IS by far the best bang for the buck.

95wip · March 30th, 2007, 01:46 AM

hey tony why not gears and pullys lol

fastford3388 · March 30th, 2007, 01:52 AM

So, I already have 3.73 gears in the rear end. Will underdrive pulleys make even more power?

homebrewed · March 30th, 2007, 02:05 AM

95wip: I think he was under the assumption that, like most, there is a choice to be made. If thats the case, gears will show the most improvement.

fastford3388: Yes, you will feel a differance, I have 3.73's and the pulleys.

95wip · March 30th, 2007, 02:34 AM

Thanks Homebrewed... sometimes i think i have more money than i really do! LOL We can dream cant we

homebrewed · March 30th, 2007, 02:44 AM

No prob bro. Sucks don't it? Like havin a super hot date, but no car to get there in... Or worse, borrowing your dads Camaro.... lol

Yeah, the pulleys are a good addition, but if belted boost in your future, save the stockers. And the factory length belt.

95wip · March 30th, 2007, 01:34 PM

so with underdrives i will need a new belt too?

and i usually keep all my stock parts!

homebrewed · March 30th, 2007, 01:49 PM

Right.
The pulleys should come with a shorter belt.

It will have an Alpha/Numeric code on it. Thats got the size hiddin in it. Its a good idea to write that sequence down and keep it in your car. Auto parts stores can't look up custom belt lenghts. If something happens to to new one, or when its time to replace it, you'll have all the info you need.

The dude behind the counter will thank you. Or, at least, I did when someone came in with that sorta thing.

Tony_90fox · March 30th, 2007, 04:27 PM

I didnt need a new belt with my u/d pullies.

And yeah, i meant if there is a shortage of money, or something to pick from, then gears are the way to go...I am still waiting to put mine in! SUCKS!

March 29th, 2007, 05:48 PM	#1
fastford3388 Regular 1991 Mustang GT Join Date: Feb 2007 Location: Lisle, IL Posts: 367 iTrader: 0 reviews	Underdrive Pulleys I've got an '89 GT and I was wondering if anyone can give me a suggestion for a set of underdrive pullies. I want a little horsepower gain (10-20) but It will still have to be able to drive on a daily baisis. I see there are alot of different brands out there: BBK, summit, trickflow, JET... the list goes on... I really don't care if they look pretty, i see some come in billit aluminum, I was just wondering what I can get the most bang for my buck out of... thanks, Mike __________________ - '90 Mustang LX-Sold "Debbie" - '89 Mustang GT- Deceased "Lucy" - '91 Mustang GT-70,000 mi "The Unicorn"

March 29th, 2007, 07:00 PM	#4
cobraetti Regular 2001 svt cobra no way (IRS) Join Date: Aug 2006 Location: goose creek,sc Posts: 304 iTrader: 0 reviews	BBK worked for me. However I recommend keeping the stock alternator pulley in use do to charging difficulties. Anyone else found this to be true? __________________ Build #1249 MM New Edge Crew Member# 6

March 29th, 2007, 07:07 PM	#6
Tony_90fox Banned Join Date: Jun 2006 Location: Bowling Green, KY Posts: 3,831 iTrader: 0 reviews	Mine is fine...I have all my accesories running and it charges fine. __________________ [SIGPIC][/SIGPIC] [B][U]MM Sapper Squad[/U][/B] [QUOTE=Regency 2007;1676187]MSO's stupidity has never stopped amazing me since the day he joined this forum.[/QUOTE]

March 29th, 2007, 07:08 PM	#7
GTXRacing Enthusiast Join Date: Apr 2006 Location: Greenville, Texas Posts: 733 iTrader: 0 reviews	BBK's here as well but not for long __________________ THE BEAST IS FOR SALE!!! GTX RACING & PERFORMACE CLUB OF TEXAS Meets and greets, drag racing and good eats, you know you want it. GTX Racing Tony P. 214-257-3635 http://www.moddedmustangs.com/forums...vehicle&CID=43

March 29th, 2007, 10:23 PM	#9
fastford3388 Regular 1991 Mustang GT Join Date: Feb 2007 Location: Lisle, IL Posts: 367 iTrader: 0 reviews	Has anyone here tried March pullies? I found them to be moderately priced and they claim a 12.5 to 15 HP gain. can anyone deem this true? __________________ - '90 Mustang LX-Sold "Debbie" - '89 Mustang GT- Deceased "Lucy" - '91 Mustang GT-70,000 mi "The Unicorn"

March 29th, 2007, 07:00 PM	#3
87foxbodylx Enthusiast 1987 Mustang LX 13.9@102.43 Join Date: Oct 2006 Location: Ephrata PA Posts: 648 iTrader: 0 reviews	BBK's here too. Keep your stock pullies just incase you wanna go blow through like home said.

March 30th, 2007, 12:47 AM	#10
95wip Regular Join Date: Mar 2007 Location: DownRiver Michigan Posts: 302 iTrader: 0 reviews	i am also looking into U/D pullys Can you really notice that much of a difference on a stock motor w/headers...i was told by the guy at the speed shop they werent worth the money very minimal gains.. __________________ 95' GT is being reconstructed!

March 30th, 2007, 01:46 AM	#13
95wip Regular Join Date: Mar 2007 Location: DownRiver Michigan Posts: 302 iTrader: 0 reviews	hey tony why not gears and pullys lol __________________ 95' GT is being reconstructed!

March 30th, 2007, 01:52 AM	#14
fastford3388 Regular 1991 Mustang GT Join Date: Feb 2007 Location: Lisle, IL Posts: 367 iTrader: 0 reviews	So, I already have 3.73 gears in the rear end. Will underdrive pulleys make even more power? __________________ - '90 Mustang LX-Sold "Debbie" - '89 Mustang GT- Deceased "Lucy" - '91 Mustang GT-70,000 mi "The Unicorn"

March 30th, 2007, 02:34 AM	#16
95wip Regular Join Date: Mar 2007 Location: DownRiver Michigan Posts: 302 iTrader: 0 reviews	Thanks Homebrewed... sometimes i think i have more money than i really do! LOL We can dream cant we __________________ 95' GT is being reconstructed!

March 30th, 2007, 01:34 PM	#18
95wip Regular Join Date: Mar 2007 Location: DownRiver Michigan Posts: 302 iTrader: 0 reviews	so with underdrives i will need a new belt too? and i usually keep all my stock parts! __________________ 95' GT is being reconstructed!

March 30th, 2007, 04:27 PM	#20
Tony_90fox Banned Join Date: Jun 2006 Location: Bowling Green, KY Posts: 3,831 iTrader: 0 reviews	I didnt need a new belt with my u/d pullies. And yeah, i meant if there is a shortage of money, or something to pick from, then gears are the way to go...I am still waiting to put mine in! SUCKS! __________________ [SIGPIC][/SIGPIC] [B][U]MM Sapper Squad[/U][/B] [QUOTE=Regency 2007;1676187]MSO's stupidity has never stopped amazing me since the day he joined this forum.[/QUOTE]

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