Dyno-MIGHT!!!
05-07-2002, 11:36 AM
#1
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Dyno-MIGHT!!!
I went up to Cleveland for some DYNO time yesterday and it was a great experience. My car put down 290HP and 330ft lbs or torque to the rear wheels, mixture was right where I needed it and boost peaks at 17Lbs. Add 16% driveline
losses and that makes my engine output at about 340 HP and 395 ft. lbs of torque. It is a real neat experience standing 4 feet away from
your car howling hammer down up to 130 mph.. I've got video. For less than a Benjamin, it's something everyone should try. For one
run, I swapped out my 86 dme for the original 89 dme with no appreciable difference, both had modded chips. You can do before and after tests with mods and settings. A lot of marketers say "this is x HP" but you can't BS the dyno. Steve at Dynojet was a great host and really knows his stuff when it comes to Porsches and 944s.
If anyone was curious, My 89 has o-ringed and polished head, drilled cycling valve, adj. fuel press, chips, no cat, shimmed wastegate, and a cam. We discovered my mixtures were right on but I run out of turbo beyond 5k, maybe 55oo it starts tapering off. The pic of the 86 on the rack is my buddy Rhen's. As I said, it is a very enlightening experience..when the Dyno starts..the BS stops. Anybody who wants to give Steve a try let me know and I'll get his phone # for you. He's way out on the far East side of Cleveland, near E300th street or something like that.
<img src="graemlins/beerchug.gif" border="0" alt="[cheers]" />
losses and that makes my engine output at about 340 HP and 395 ft. lbs of torque. It is a real neat experience standing 4 feet away from
your car howling hammer down up to 130 mph.. I've got video. For less than a Benjamin, it's something everyone should try. For one
run, I swapped out my 86 dme for the original 89 dme with no appreciable difference, both had modded chips. You can do before and after tests with mods and settings. A lot of marketers say "this is x HP" but you can't BS the dyno. Steve at Dynojet was a great host and really knows his stuff when it comes to Porsches and 944s.
If anyone was curious, My 89 has o-ringed and polished head, drilled cycling valve, adj. fuel press, chips, no cat, shimmed wastegate, and a cam. We discovered my mixtures were right on but I run out of turbo beyond 5k, maybe 55oo it starts tapering off. The pic of the 86 on the rack is my buddy Rhen's. As I said, it is a very enlightening experience..when the Dyno starts..the BS stops. Anybody who wants to give Steve a try let me know and I'll get his phone # for you. He's way out on the far East side of Cleveland, near E300th street or something like that.
<img src="graemlins/beerchug.gif" border="0" alt="[cheers]" />
05-07-2002, 11:59 AM
#3
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I hit 17.6 lbs, carrying at least 17 from 3800 till it started tapering off at 4800. Next mod, bigger turbo...But it will be a while. (does it ever end? $$??)
Man, the sound was amazing..
Man, the sound was amazing..
05-07-2002, 12:05 PM
#4
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Worth noting, the guy on the rack before us was in an Impala SS getting his "baseline" or stock numbers pre-mods. He ran something like 220 HP, Steve explained chevy's LT1 driveline has the highest driveline power loss of any car he's ever tested, as high as 25%!! This would explain why similar power/weight Porsches vs. Chevys and other domestics show the Porsche having big advantages, it is lost in the gross ineffiency of their drivelines!
05-07-2002, 12:38 PM
#5
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[quote]Originally posted by Dan P:
<strong>Worth noting, the guy on the rack before us was in an Impala SS getting his "baseline" or stock numbers pre-mods. He ran something like 220 HP, Steve explained chevy's LT1 driveline has the highest driveline power loss of any car he's ever tested, as high as 25%!! This would explain why similar power/weight Porsches vs. Chevys and other domestics show the Porsche having big advantages, it is lost in the gross ineffiency of their drivelines!</strong><hr></blockquote>
Well, the Impala SS does have an automatic transmission. Automatics always have more loss than a manual, because they have a fluid connection (torque converter) instead of a direct mechanical connection.
The usual power loss figures used for LS1 engines (C5 corvettes, 98+ camaro/firebirds) are 15% for manual, and 20% for automatic. I thought LT1's were about the same.
<strong>Worth noting, the guy on the rack before us was in an Impala SS getting his "baseline" or stock numbers pre-mods. He ran something like 220 HP, Steve explained chevy's LT1 driveline has the highest driveline power loss of any car he's ever tested, as high as 25%!! This would explain why similar power/weight Porsches vs. Chevys and other domestics show the Porsche having big advantages, it is lost in the gross ineffiency of their drivelines!</strong><hr></blockquote>
Well, the Impala SS does have an automatic transmission. Automatics always have more loss than a manual, because they have a fluid connection (torque converter) instead of a direct mechanical connection.
The usual power loss figures used for LS1 engines (C5 corvettes, 98+ camaro/firebirds) are 15% for manual, and 20% for automatic. I thought LT1's were about the same.
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05-07-2002, 03:09 PM
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Here's a <a href="http://www.virgeweb.com/rage2/944t/2002-01%20951%20dyno.wmv" target="_blank">video</a> of my dyno run a few months back. This was when everything was just installed, before fuel/boost tuning, on a non loaded dyno with intake leak =).
339hp/404ft-lbs was what I got that day.
339hp/404ft-lbs was what I got that day.
05-07-2002, 03:49 PM
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Thanks Ian.
I want to work on and tune my car so bad the last month, but it's been raining/hailing/wet snowing daily for the last month. Then came the "big storm" on Sunday night... didn't stop until Tuesday morning. My garage is blocked with 4 feet of snow. Since I've replaced all my car's tires with summer tires, I couldn't even get to work yesterday. Even public transit, taxis, all took 4 hours to get downtown from my place. Sucks...
I want to work on and tune my car so bad the last month, but it's been raining/hailing/wet snowing daily for the last month. Then came the "big storm" on Sunday night... didn't stop until Tuesday morning. My garage is blocked with 4 feet of snow. Since I've replaced all my car's tires with summer tires, I couldn't even get to work yesterday. Even public transit, taxis, all took 4 hours to get downtown from my place. Sucks...
05-07-2002, 04:47 PM
#11
Nordschleife Master
Dan p, who did your head work?
Nice numbers btw! Gives me some hope for the k26/8.
I'm looking to run 15-16psi of boost with a test pipe, AFPR, steve R chips and MBC, maybe a greddy profec B...I think your numbers minus 15-25 is reasonable...
Nice numbers btw! Gives me some hope for the k26/8.
I'm looking to run 15-16psi of boost with a test pipe, AFPR, steve R chips and MBC, maybe a greddy profec B...I think your numbers minus 15-25 is reasonable...