Impressions after Underdrive Pulley install
05-25-2009, 10:09 PM
#11
1st Gear Member
Join Date: Sep 2008
Location: NC
Posts: 116
For guys like me who, right or wrong, have committed to stay naturally aspirated - every 5 HP counts.
The one thing I really noticed after my Steeda UDP install was that the car rev'd higher on startup before it came back down to idle than it had with the stock piece.
The one thing I really noticed after my Steeda UDP install was that the car rev'd higher on startup before it came back down to idle than it had with the stock piece.
10-14-2009, 03:09 PM
#13
1st Gear Member
Join Date: Sep 2009
Location: North Carolina
Posts: 63
10-14-2009, 04:36 PM
#14
6th Gear Member
The free-up from UDP's is minimal (~3-6 RWHP) but there nontheless. Most "butt dynos" won't notice it. I'm not sure that I'd expect to feel it but that wouldn't stop me from adding them at some point. After a CAI & tune on a NA engine, the 3 RWHP here, 6 RWHP there is mostly all that's left beyond nitrous and cams. Combination mods (i.e. cams with LT's) will knock your socks off like the CAI & tune. Minor mods add up. Someone with UDP's, delete plates and an aluminum DS (with all else being equal) can certainly smile harder.
10-21-2009, 12:03 AM
#15
5th Gear Member
Join Date: Oct 2009
Location: Maui
Posts: 4,752
+2
The free-up from UDP's is minimal (~3-6 RWHP) but there nontheless. Most "butt dynos" won't notice it. I'm not sure that I'd expect to feel it but that wouldn't stop me from adding them at some point. After a CAI & tune on a NA engine, the 3 RWHP here, 6 RWHP there is mostly all that's left beyond nitrous and cams. Combination mods (i.e. cams with LT's) will knock your socks off like the CAI & tune. Minor mods add up. Someone with UDP's, delete plates and an aluminum DS (with all else being equal) can certainly smile harder.
The free-up from UDP's is minimal (~3-6 RWHP) but there nontheless. Most "butt dynos" won't notice it. I'm not sure that I'd expect to feel it but that wouldn't stop me from adding them at some point. After a CAI & tune on a NA engine, the 3 RWHP here, 6 RWHP there is mostly all that's left beyond nitrous and cams. Combination mods (i.e. cams with LT's) will knock your socks off like the CAI & tune. Minor mods add up. Someone with UDP's, delete plates and an aluminum DS (with all else being equal) can certainly smile harder.
Good point Nuke...........its the sum of the mods working together.
patrick
10-21-2009, 03:19 AM
#18
Multi-Tasking Moderator!
Join Date: Nov 2006
Location: Detroit Rock City!
Posts: 15,618
When I get the Steeda/Whipple belt drive I will add the Steeda UDP's (even if I notice no change in HP) I never use my A/C anyway but should I want to....I know it will draw less power to turn the A/C compressor....and free up the S/C compressor in the process (dedicated belt from crank pulley to S/C pulley)....2 birds with 2 mods....sounded better before I wrote it....
10-21-2009, 05:59 PM
#19
1st Gear Member
Thread Starter
Join Date: Jan 2009
Location: PR
Posts: 69
This thread rose from the dead on it's own. Seems Halloween's just around the corner. 
Turbo styled, by the looks of the product pics.
http://www.youtube.com/watch?v=gNkTSPYvNfw
This is the ONLY recording of pacesetter stuff on an S197 I've found on all the internet. I really wanted my car to sound like this, but PS never got around to manufacturing the stuff, it seems. I went with the tried and true combo of American Racing Headers and Borla.
I guess I'll add a little more input on the pulleys since I'm here.
It's been six months with them on, and I haven't had a single issue with them. A/C works fine. Factory HID's work fine.
Something I never mentioned before was that at WOT, as the car shifts, the RPMs don't drop as low as they used to on the next gear. My car is an auto, so I could really tell the difference since the shifting is always the same, at the same speed/rpm point. It kinda feels like your tranny is slipping, but it is not. (or so I hope)
http://www.youtube.com/watch?v=gNkTSPYvNfw
This is the ONLY recording of pacesetter stuff on an S197 I've found on all the internet. I really wanted my car to sound like this, but PS never got around to manufacturing the stuff, it seems. I went with the tried and true combo of American Racing Headers and Borla.
I guess I'll add a little more input on the pulleys since I'm here.
It's been six months with them on, and I haven't had a single issue with them. A/C works fine. Factory HID's work fine.
Something I never mentioned before was that at WOT, as the car shifts, the RPMs don't drop as low as they used to on the next gear. My car is an auto, so I could really tell the difference since the shifting is always the same, at the same speed/rpm point. It kinda feels like your tranny is slipping, but it is not. (or so I hope)
