Udps and a pp plenum

Everett · February 1st, 2011, 03:03 AM

K I have a 2000 gt with mods listed in sig. I just bought some underdrive pulleys and a proffesional products plenum. Wadaya guys figure I am gonna gain outta this. Maybe 10 hp or so. I paid 160 total for the parts and just wondering if they are worth it. The plenum is pretty but I like the horse better however I have heard that the plenum is the biggest restriction on the 4.6. And what is the REAL gain of udps not the advertised gain. I noticed a pretty big difference in throttle responce when the accufab went on,revved up quicker. Anyways thanks in advance for input. And how hard is install on the pulleys. Thanks

ajm · February 1st, 2011, 03:25 AM

Youll notice a little more throttle response more than anything, in reality a couple hp is about all youll see out of each. As for the pulleys, install is really simple, but if theyre the piggy back style your best bet is to sell them and get a set that comes with sfi approved crank pulley.

Everett · February 1st, 2011, 03:31 AM

They aren't piggyback type. I am just wondering if I need a pulley puller or are they a simple bolt on. Thanks. I didn't figure I was gonna get much. The tb really helped my throttle response so if the plenum give me the same gain as tb I am happy. And if I leave the water pump pulley stock is it even worth doing. I really would rather leave it alone due to my driving habits and lots of stop and go driving

ajm · February 1st, 2011, 03:34 AM

Youll need a puller. Bolt type not jaw type. Theyre cheap or you can rent them at a parts store. Plenum should give you a bit more response than the tb did being that the plenum is more restrictive than the tb, plus you now have them both combined.

You shouldnt see any problems changing the water pump pulley. Most of the issues come from the alternator pulley not allowing the alternator to spin fast enough to charge well enough more so than the water pump not flowing enough water.

Everett · February 1st, 2011, 03:40 AM

Great to know. Thank you. I don't have subs or anything and aren't plannignon putting any in so it's not much electrical draw. Thanks alot

ajm · February 1st, 2011, 03:41 AM

no problem

Everett · February 1st, 2011, 04:06 AM

Glad to have ya back ajm

99GT35thLE · February 1st, 2011, 06:27 AM

Some advice on installing the crank pulley, rent a puller and the harmonic balancer install tool. Don't use the longer bolt to try and screw the pulley onto your crank. There's a good chance of you stripping the threads out in your crank doing it that way.

Everett · February 1st, 2011, 07:48 AM

Originally Posted by 99GT35thLE

Some advice on installing the crank pulley, rent a puller and the harmonic balancer install tool. Don't use the longer bolt to try and screw the pulley onto your crank. There's a good chance of you stripping the threads out in your crank doing it that way.

Good advice. Are you saying to reuse the stocker

Bullitt5339 · February 1st, 2011, 11:49 AM

The only way you'll strip the threads is if you try to tighten the longer bolt too much. It's just to pull the balancer onto the crank snout far enough to get the factory bolt in it. Then you torque down the factory bolt.

Everett · February 1st, 2011, 01:12 PM

Thanks bullitt and thanks ajm for the advice. Great help

February 1st, 2011, 03:03 AM	#1
Everett Hardcore Enthusiast 2000 gt Join Date: Oct 2010 Location: Saskatoon Posts: 1,053 Blog Entries: 1 iTrader: 2 reviews	Udps and a pp plenum K I have a 2000 gt with mods listed in sig. I just bought some underdrive pulleys and a proffesional products plenum. Wadaya guys figure I am gonna gain outta this. Maybe 10 hp or so. I paid 160 total for the parts and just wondering if they are worth it. The plenum is pretty but I like the horse better however I have heard that the plenum is the biggest restriction on the 4.6. And what is the REAL gain of udps not the advertised gain. I noticed a pretty big difference in throttle responce when the accufab went on,revved up quicker. Anyways thanks in advance for input. And how hard is install on the pulleys. Thanks __________________ Black and White Crew Crew Member # 3 centerforce dual friction,.100 shot freeflow exhaust,70mm accufab tb,professional products plenum, tri ax,3.90s amazing how fast you can go when the road never curves .....lighting up the Canadian prairie

February 1st, 2011, 03:31 AM	#3
Everett Hardcore Enthusiast 2000 gt Join Date: Oct 2010 Location: Saskatoon Posts: 1,053 Blog Entries: 1 iTrader: 2 reviews	They aren't piggyback type. I am just wondering if I need a pulley puller or are they a simple bolt on. Thanks. I didn't figure I was gonna get much. The tb really helped my throttle response so if the plenum give me the same gain as tb I am happy. And if I leave the water pump pulley stock is it even worth doing. I really would rather leave it alone due to my driving habits and lots of stop and go driving __________________ Black and White Crew Crew Member # 3 centerforce dual friction,.100 shot freeflow exhaust,70mm accufab tb,professional products plenum, tri ax,3.90s amazing how fast you can go when the road never curves .....lighting up the Canadian prairie

February 1st, 2011, 03:40 AM	#5
Everett Hardcore Enthusiast 2000 gt Join Date: Oct 2010 Location: Saskatoon Posts: 1,053 Blog Entries: 1 iTrader: 2 reviews	Great to know. Thank you. I don't have subs or anything and aren't plannignon putting any in so it's not much electrical draw. Thanks alot __________________ Black and White Crew Crew Member # 3 centerforce dual friction,.100 shot freeflow exhaust,70mm accufab tb,professional products plenum, tri ax,3.90s amazing how fast you can go when the road never curves .....lighting up the Canadian prairie

February 1st, 2011, 04:06 AM	#7
Everett Hardcore Enthusiast 2000 gt Join Date: Oct 2010 Location: Saskatoon Posts: 1,053 Blog Entries: 1 iTrader: 2 reviews	Glad to have ya back ajm __________________ Black and White Crew Crew Member # 3 centerforce dual friction,.100 shot freeflow exhaust,70mm accufab tb,professional products plenum, tri ax,3.90s amazing how fast you can go when the road never curves .....lighting up the Canadian prairie

February 1st, 2011, 06:27 AM	#8
99GT35thLE Hardcore Enthusiast 1999 GT 35th LE Join Date: Dec 2009 Location: Jacksonville, Florida Posts: 1,428 iTrader: 0 reviews	Some advice on installing the crank pulley, rent a puller and the harmonic balancer install tool. Don't use the longer bolt to try and screw the pulley onto your crank. There's a good chance of you stripping the threads out in your crank doing it that way. __________________ Drive it like you stole it

February 1st, 2011, 03:25 AM	#2
ajm Banned Join Date: May 2008 Posts: 7,966 iTrader: 4 reviews	Youll notice a little more throttle response more than anything, in reality a couple hp is about all youll see out of each. As for the pulleys, install is really simple, but if theyre the piggy back style your best bet is to sell them and get a set that comes with sfi approved crank pulley.

February 1st, 2011, 03:34 AM	#4
ajm Banned Join Date: May 2008 Posts: 7,966 iTrader: 4 reviews	Youll need a puller. Bolt type not jaw type. Theyre cheap or you can rent them at a parts store. Plenum should give you a bit more response than the tb did being that the plenum is more restrictive than the tb, plus you now have them both combined. You shouldnt see any problems changing the water pump pulley. Most of the issues come from the alternator pulley not allowing the alternator to spin fast enough to charge well enough more so than the water pump not flowing enough water.

February 1st, 2011, 03:41 AM	#6
ajm Banned Join Date: May 2008 Posts: 7,966 iTrader: 4 reviews	no problem

February 1st, 2011, 11:49 AM	#10
Bullitt5339 Hardcore Enthusiast 2001 Bullitt 12.25@110.4 Join Date: Mar 2010 Location: North Carolina Posts: 2,599 iTrader: 1 reviews	The only way you'll strip the threads is if you try to tighten the longer bolt too much. It's just to pull the balancer onto the crank snout far enough to get the factory bolt in it. Then you torque down the factory bolt. __________________ Bolt-On Bullitt... Unmodified longblock, stock intake and throttle body. 266rwhp/306rwtq 12.25@110.4 1.64 60ft Currently Under Reconstruction

February 1st, 2011, 01:12 PM	#11
Everett Hardcore Enthusiast 2000 gt Join Date: Oct 2010 Location: Saskatoon Posts: 1,053 Blog Entries: 1 iTrader: 2 reviews	Thanks bullitt and thanks ajm for the advice. Great help __________________ Black and White Crew Crew Member # 3 centerforce dual friction,.100 shot freeflow exhaust,70mm accufab tb,professional products plenum, tri ax,3.90s amazing how fast you can go when the road never curves .....lighting up the Canadian prairie

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