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928 Dyno Day in Green Bay Results (aka Sharks in Titletown)
I coaxed the Green Bay 928 boys into hosting me for the weekend. It also happened to be the Lions vs. the Packers so we could tailgate and party. :D
In case you've never heard it, Green Bay likes to call itself, "Titletown." Something to do with winning the superbowl a few years back or something. Anyway, the saying for the weekend was, "Sharks in Titletown - Just as fun as Sharks in the Mountain, without all the hillbillies!" :roflmao: It lived up to it's billing. We had Tim Murphy, Hacker-Pschorr, SwayBar, Z, Ariel (don't know his screen name), and me all at the dyno on Saturday. Luckily, for once, the dyno gremlins didn't attack the boosted cars. It was a crisp morning and none of us were too hungover. I think the temp on my display said 41*F, and let me just say, GODDAMN! these cars like that cold air. I was breaking the tires loose easily in 3rd gear! On the way to the dyno, on a closed highway couse, Murf and I were side-by-side. We slowed to about 50 or 60MPH. I down-shifted into shifted into 3rd gear, and I think I heard Murf downshift into 3rd as well. Murf looked over, honked his horn three time and it was game on! We both punched it simultaneously, and I couldn't believe it... I was actually pulling on him. Then I shifted. You know... as much as I love having a manual transmission, it sucks when you're drag racing. You just cannot shift it fast enough when going against an auto. More on that later. So there I was, pulling on Murf, then I shifted. I lost maybe a half a car-length but then held right with him. I was amazed. This has never happened before. He usually walks me. But here I was holding my own. Next thing I know we're doing a buck forty or something and traffinc (again professional drivers) was coming up real fast. What a great way to start the morning. So we get to the dyno (BIG plug here for Beyond Redline in Green Bay, WI. Luke, the dyno owner/opperator, really knows his ****. If you have a chance to go there... it's money well spent!) and Hacker has his 1981 us/Euro Hybrid project strapped down getting a baseline before reconnecting the SCer. Don't want to steal his thunder, so I'll let him volunteer the numbers if he wants to at this point. I know he'll post them when he re-dynos it with the SCer hooked up. Look for big numbers. The car is very healthy. Here he is looking all cool and stuff. http://lh6.ggpht.com/_Q-VMuv9awdo/TK...U/s800/029.JPG Next up was Ariel in his stock 1987 S4 5-speed. Unfortunately we quickly discovered a lean issue and could not continue on the dyno. We spent the rest of the night (until 4am) trying to figure it out. Z and I think it's either a marginal CPS or the wiring between the EZK and the LH is suspect. Hopefully he'll post a separate thread where we can discuss. It was a real head scratcher. https://lh3.ggpht.com/_Q-VMuv9awdo/T...0/P1010979.JPG Me, doing some SharkTuning to his car. https://lh5.ggpht.com/_Q-VMuv9awdo/T...0/P1010980.JPG Seeing that the dyno gremlins were afoot, the next person on the dyno was either me or Murf. I challenged him to rock, paper, siccors, to see who would go next. I won - he lost. So Tim loaded up his wife's car. It's a 1987 Auto with about 60k miles on it. Tim has his Stage III kit on it. Here is the video of his dyno pull. :bowdown: Obviously he was happy with the results. http://lh6.ggpht.com/_Q-VMuv9awdo/TK...g/s800/034.JPG Dyno Chart https://lh4.ggpht.com/_Q-VMuv9awdo/T...Capture016.jpg Next up was yours truly. I was nervous because Murf had just thrown down a BIG number and the last time I was on this dyno I only put down a titch above 400. Could Murf really be 100RWHP ahead of me? If so, why did we hang with each other on our little race earlier in the morning? Am I putting down that kind of power? Well, here's the video. Dyno chart https://lh3.ggpht.com/_Q-VMuv9awdo/T...Capture015.jpg Let me say I was tickled with the outcome. The car is fast - especially in the cold air. What I find interesting is when you put Murf's chart with mine. You can see I make a bit more power down low and then at about 4500 RPM he takes over and keeps climbing. This might explain why I pulled on him for a bit but then just hung steady. The cars are pretty close. https://lh5.ggpht.com/_Q-VMuv9awdo/T...Capture017.jpg Then, both Murf and I got a ride in a Nissan GT-R. Holy crap, that thing can hook up. He makes about 480WHP (all wheel drive). 0-60 in about 3.2 seconds. Of course, not to be out done, Murf and I had to go out and do another (virtual) drag race... this time from a stop and with our G-tech's enabled on the car. BTW, I tried to find out what a 0-60-0 would look like, but I guess I didn't stop long enough for the G-tech to register it, and thus blew the reading. The number speak for themselves. If you want a drag car, don't buy a 5-speed. My car is the black line. http://lh6.ggpht.com/_Q-VMuv9awdo/TK...Capture018.jpg It's clear that I lose time on the shifts. You almost can't see his shifts. I had a better 60ft time (which is usually a deciding factor in drag racing), but ended up losing. http://lh6.ggpht.com/_Q-VMuv9awdo/TK...Capture019.jpg No matter, my adrenaline was pumping. Hands were shaking pretty good when we got back to his place. The next day we went to Hacker's place which is only a few blocks away from Lambeau Field. I watched the Lions loose against the Packers (no surprise there). Saw Big Dave, Todd-the-Mad-Scientist, Tim S, and a few other good friends. https://lh4.ggpht.com/_Q-VMuv9awdo/T...0/P1010985.JPG https://lh5.ggpht.com/_Q-VMuv9awdo/T...0/P1010986.JPG https://lh3.ggpht.com/_Q-VMuv9awdo/T...0/P1010987.JPG https://lh5.ggpht.com/_Q-VMuv9awdo/T...0/P1010989.JPG BTW, I think this is the fastest Porsche powered 928 on the road right now... 675 RWHP! Wow! https://lh3.ggpht.com/_Q-VMuv9awdo/T...0/P1010993.JPG That's my story, and I'm sticking to it. :cheers: :thumbup: |
I'm hurt, really hurt. :icon107:
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Good stuff, AO.
The twin screw rocks down low. With stock cams, the centrifugal supercharger can compensate the cams running out of breath at the top end. I am in the 650 axle hp neighborhood as well, and I think I have figured out a couple more tricks to try with the stock long block before it's maxed out. Once I get the fuel pump real smooth and quiet, I'll head back to the dyno. |
Great story, AO.
Can't wait to take a closer look at the dynocharts tomorrow. Reads like good people up dere in Cheeseheadland. ;) |
As a participant I can say it was a great outing, at least the party (I didn't make the dyno day).
A lot of very impressive cars, a few were even other than 928s. Definately a lot of great people. Thanks for hosting Erik:cheers: |
Looks like a really fun gathering, and some really nice numbers tossed up too.
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Dyno charts look exactly as I would expect. TS has a large torque advantage at low RPM. Power profiles follow the boost curves almost exactly. You can even see the increased efficiency of the centrifugal... the power lines cross where the centrifugal is at ~1psi less. At SITM09 I just so happened to be following a Murf car to dinner, and I found similar results. At lower RPMs, I would gain, but as we reached ~4k or so, the gain stopped. Too bad my front tires were screeching like they were subjected to chinese water torture in the corners, I'm too cheap when it comes to tires :)
Dan '91 928GT S/C :eek: 475hp/460lb.ft |
looks like you guys had a BLAST!!!!
It makes sense that the TS will pull the CS at lower RPM...its all about boost and until about 4500 the TS has more...at 10psi both cars are pretty similar.... So the magic trick would be a TS automatic making 15psi!!! Now that would be a rocketship!!!! Personally I am biased towards the automatic....plenty of boosted automatic 928's out there making silly dyno #'s and doing ORR, etc....plus the 5 speed version of our automatics is rated for up to 800ftlbs!!!! Basically the same thing Benz uses in all the AMG twin turbo V12 cars with 604hp-738 torque..... I have 53 HOURS on track in a well worn USED automatic and it just keeps on ticking....granted its only asked to cope with 241ftlbs to the ground...but it handles it with ease....I doubt the 5 speed could survive 53 hours on track with no issues.... |
Originally Posted by IcemanG17
(Post 7952062)
....I doubt the 5 speed could survive 53 hours on track with no issues....
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Originally Posted by Andrew Olson
(Post 7952075)
Kibort bait? :roflmao:
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You guys sure know how to have a great time
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Thanks for posting...brings back memories of home.
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Originally Posted by blitz928
(Post 7952401)
Thanks for posting...brings back memories of home.
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What a great weekend!
Like Andrew said, this is the first time the dyno gremlins didn't bite anyone square in the ass like usual. I actually accomplished some very useful tuning while on the dyno, thanks to the owner/operator of Beyond Redline, Luke. I tell ya, that boy has all his wires connected in the right places. We could have tweaked a few things to eek out some more ponies but the car runs great the way it is and has what we feel is a nice and safe tune. Besides that, this is my wife’s car and it is plenty fast enough. Even though AO shows more torque below 4k I still have trouble getting the power to the ground and not just cooking the tires in 1st and 2nd gear. You can see by the G-Force graph from the G-Tech run that I lost about a half a second to AO in first gear by spinning the tires. I had to lift a little which caused a short shift from 1st to 2nd. I really need to do this again with drag radials and see what it can do with a flat to the floor 1st gear start. Although, in its current setup this is a GREAT burnout car. No power braking required :evilgrin: |
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