Back in June I added a UDP and track tested it. I ran a 15.01@92.5mph. Conditions were pretty bad with temps in the 80s and humidity at over 90%. I felt the conditions weren't representitive of the conditions when I ran my best of a 14.7@93.93mph so it was hard to judge the gains of the UDP. Tonight, the weather was about as good has it been in quite a while. Temps were in the lower 70s with temps falling to the mid 60s when I left. The pressure was at 30.00 and humidity was in the 65-75% range. Unfortunately we were running into a 8-10mph headwind. The track is KCIR and is situated at 1000' above sea level. As you can tell, I'm a number guy.

My car hadn't felt very quick lately so I wasn't expecting much, but to have some fun. On my first run I got tons of wheelspin and ended up with a 14.93@95.08mph and 2.35 60 foot!!! Yikes, I got some topend!!! I thought it was a fluke and hot lapped another run. BAM!!! 14.91@95.51mph with another dismal 2.30 60 foot!!! I let the car cool down for 1/2 hour. I came back out and ran a 14.81@95.01mph with a 2.30 60 foot. This wasn't a fluke. All but one of my seven runs were below 95mph!!! I decided to experiment and not shift to 4th. This run netted me only 94mph. My 95.5mph trap speed is 1.5mph faster than I've ever gone. I was less than a tenth off my best et too which was in 20 degrees cooler and 50% humidity weather. I honestly feel that the UDP gave me the added topend and the added low rpm torque proved too much. I will have to learn to launch this car again. I am completely stoked. Staying in the 95mph range tells me I should be able to hit some 14.5s with traction, maybe a 14.4. It was nuts. I was trapping out as fast as many of the 30 modified Grand Prix GTPs (National Grand Prix meet in Kansas City).

My setup was 1/4 tank of 91 octane, no spare or jack, 26 psi in the front and 40 psi in the rear.



Dave

Do you what was the fastest GTP there ran? Btw, nice runs. :)

Wow, those are some pretty fast trap speeds.

@95mph you should be at least a 14.5. 14.4 with a good lunch.

this is probably a stupid question, but here goes. i've heard a lot of people saying that they got faster times with a udp but the case seems only with the stick shifts. i know what the udp does, but does it really help the automagics? if it does, i know what my next mod is :D

Apparently it yields ~6hp and 10lb-ft gain for sticks. It doesn't help quite as much for autos.

The quickest Pontiac was a Lumina with the 3.8 SC motor and NOS. He was on slicks and got pushed to the line. He busted off a 12.85@108mph....once. On the 3 other runs he got excessive knock and had to back off. Most of the modded GTPs with smaller 3.4" pullies, exhaust, intake, no headlight, iced intake, no airfilter, race gas, and drag radials were in the 14.2-14.9@92-96mph. One dipped into the 13s. Most of these guys were .3-.4 and 2-3mph off their typical runs in their hometowns.

Two Vipers were there running consistent 12.5s, two Supras running 11.7s-12.5s, and a ZO6 running 13.0s.


Dave

I keep reading that it doesn't 'help' much for the autos but I never see any data (ie dyno) to back this up. Anyone have a dyno chart?

Yeah, any gains with the mods I have on the auto??? I am very curious to here from some pepes that have the UDP auto. I need more speed, I do not want to SC, I may NOS and do a VB, the UDP is the only other thing I can think of, any suggestions????

As for the udp, I love it on my 99 5-spd. Noticed differences all around. Good luck automagics!

hmm.... maybe I'll pick one up soon... I guess i'll wait and see if ejj can beat me again (I rule my local track for now [maximas])

who knows? Maybe I'll visit your track!!

Awesome runs, Dave! I'm still waiting for that cold front to make it down this way (central Fl.) so I can go back to the track to test my UDP. My dyno showed some decent gains with the pulley, so I want to see if it helps my track times.
It should start cooling off by next month if we're lucky.

Terry
__________________________________________________ ________
98 SE/ 5 speed/ CAI/ UDP/ Stillen Y pipe/ RT cat/ Courtesy B pipe/ Stock muffler
FSTB/RSB/ Clear front bumper lenses/ Clear tails

14.73 @94.1

You guys that have the UDP, Do you buy it online and get a local shop to install it or do you do it yourselves?
Also, Does anyone have the link to where to buy the UDP?