Dyno Battle
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Drifting
Joined: Jul 2002
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From: Los Angeles, CA
Just to add a little positve comment:
I know a lot of people kind of jumped on the whole stroker vs. supercharged thing.
But looking at the curves, and power levels, they are not *that* far from each other...
Great to compare what works, what doesn't, etc...
But any of those cars would be impressive on the street.
All those cars deserve respect for taking the 928 to power levels
we can all be *very* proud of.
I don't care who has 100 or 50 more rwhp.
On the street, getting the power to the ground is more of a challenge than eeking out an extra 50 hp...
What I think is cool, is that *these* 928's will not be disrespected or laughed at by other Porsche owners, Corvette owners, or anyone else. These are now awesome GT cars, that can also scorch the tires at the stoplight, and put down impressive torque numbers...
I know a lot of people kind of jumped on the whole stroker vs. supercharged thing.
But looking at the curves, and power levels, they are not *that* far from each other...
Great to compare what works, what doesn't, etc...
But any of those cars would be impressive on the street.
All those cars deserve respect for taking the 928 to power levels
we can all be *very* proud of.
I don't care who has 100 or 50 more rwhp.
On the street, getting the power to the ground is more of a challenge than eeking out an extra 50 hp...
What I think is cool, is that *these* 928's will not be disrespected or laughed at by other Porsche owners, Corvette owners, or anyone else. These are now awesome GT cars, that can also scorch the tires at the stoplight, and put down impressive torque numbers...
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Joined: Dec 2001
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How about a 106mm cleeved 928 block with a stroker crank, running Ti rods, etc, with JE pistons, and a Super-Duper cam, Ti valves, retainers, etc, and a nice T trime sitting in front.
Run that thing to 7500 and you have 900hp.
BC is right. Even Lingenfelter doesn't do 900hp engines - they don't hook up, and its no fun that way.
Run that thing to 7500 and you have 900hp.
BC is right. Even Lingenfelter doesn't do 900hp engines - they don't hook up, and its no fun that way.
Drifting
Joined: Feb 2002
Posts: 2,015
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From: Redondo Beach, CA>>>>Atlanta,GA
Tony,
Great job with the graphs.
My power curves are pretty much what I was shooting for. I wanted to be more towards stroker than turbo on the power-curve shape continuium
We're going to put the Whipple system on an 89 next weekend hopefully. I'll try to do before and after dynos if time permits.
Then I'll be putting the Jag/Eaton system back on my car for some testing with an intercooler, or maybe even methanol injection. There is something I like about the methanol injection concept, mainly its simplicity. It's also much lighter and less invasive.
Andy K
Great job with the graphs.
My power curves are pretty much what I was shooting for. I wanted to be more towards stroker than turbo on the power-curve shape continuium
We're going to put the Whipple system on an 89 next weekend hopefully. I'll try to do before and after dynos if time permits.
Then I'll be putting the Jag/Eaton system back on my car for some testing with an intercooler, or maybe even methanol injection. There is something I like about the methanol injection concept, mainly its simplicity. It's also much lighter and less invasive.
Andy K
Banned
Joined: Feb 2002
Posts: 5,248
Likes: 5
From: Ft. Lauderdale FLORIDA
Sterling...my stock [other han exhaust] S2 broke the tires loose and sent the rear end sideways in a downshift to 4th at 90 mph once. That's not much of a test-
[Tires: Kelly, 400 treadwear, size 225/50-16. Dry road]
Normy hung a pair of 275-width 180 treadwear tires on the back shortly afterwards for a reason-
NOW...if I could only cure my miss so that the car ran that way ALL the time~!
White968- With smaller engines, such as the one in the Honda S2000, the torque advantage of a supercharged engine is VERY apparent! The Audi might not match your S [kewl car by the way- I love the notion of a car with but one purpose-] in instrumented testing, but that car and a few others of similar weight and horsepower but with huge torque advantages would KICK YOUR CARS *** in traffic! Unless you drive around at 6000 rpm, by the time you get that thing into VTRASH and into its powerband, the person in the Audi [or 5.0 Mustang...] is already gone. Bye-
My point is that at the small-block V8 level, a huge amount of torque is not anywhere near as much of an advantage as at the 4 cylinder level. Having a "peaky" 928 seems a better strategy- at least when the power arrives, you've got the rear end hooked up-
N!
'85 S2 5 Speed
[Tires: Kelly, 400 treadwear, size 225/50-16. Dry road]
Normy hung a pair of 275-width 180 treadwear tires on the back shortly afterwards for a reason-
NOW...if I could only cure my miss so that the car ran that way ALL the time~!
White968- With smaller engines, such as the one in the Honda S2000, the torque advantage of a supercharged engine is VERY apparent! The Audi might not match your S [kewl car by the way- I love the notion of a car with but one purpose-] in instrumented testing, but that car and a few others of similar weight and horsepower but with huge torque advantages would KICK YOUR CARS *** in traffic! Unless you drive around at 6000 rpm, by the time you get that thing into VTRASH and into its powerband, the person in the Audi [or 5.0 Mustang...] is already gone. Bye-
My point is that at the small-block V8 level, a huge amount of torque is not anywhere near as much of an advantage as at the 4 cylinder level. Having a "peaky" 928 seems a better strategy- at least when the power arrives, you've got the rear end hooked up-
N!
'85 S2 5 Speed
Three Wheelin'
Joined: Nov 2001
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From: Northern Kentucky
Who cares about traffic light driving? All I know is when I drop the hammer down an on ramp or passing out on the highway, there is not much that I can't get by.
If a problem ever surfaces, I just turn the screw and pump 5 more lbs of boost in from the cockpit
If a problem ever surfaces, I just turn the screw and pump 5 more lbs of boost in from the cockpit
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Joined: May 2001
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From: Las Vegas
http://www.kennebell.net/media/articles/SNAKEBITE.pdf
Good article on the progression of power and the tweeking they did. Of course they have the luxury of playing with a "mass produced car" whose chips are easily tuneable.
Anyway.....
03 Cobra with a KenneBell SC.
565Rwhp..17.3psi...pump gas
They did get 600 but chickened out and added 112oct. race gas in the final runs, which to me makes there 600hp acheivement pointless for an everyday "street car".
edit: Found this as well. Kind of a little catch all guide of numbers.
http://www.kennebell.net/techinfo/ge...perf-guide.pdf
Good article on the progression of power and the tweeking they did. Of course they have the luxury of playing with a "mass produced car" whose chips are easily tuneable.
Anyway.....
03 Cobra with a KenneBell SC.
565Rwhp..17.3psi...pump gas
They did get 600 but chickened out and added 112oct. race gas in the final runs, which to me makes there 600hp acheivement pointless for an everyday "street car".
edit: Found this as well. Kind of a little catch all guide of numbers.
http://www.kennebell.net/techinfo/ge...perf-guide.pdf
Last edited by Tony; Nov 26, 2003 at 02:44 AM.
Drifting
Joined: Feb 2002
Posts: 2,015
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From: Redondo Beach, CA>>>>Atlanta,GA
Tony,
I can't wait to read that article. FYI Kenne Bell is a SC kit company and they use Autorotor superchargers for their kits. I think they use a 1.7 liter blower for the Mustang Cobra kit. I know they use the 1.7 for their non-cobra mustang kits. I had thought of using the Autorotor but I don't think they are sold as units in the US. Whipple claims that their blower is the best in the world anyway. I think also that Eaton makes all the screws to complicate matters even more.
Andy K
I can't wait to read that article. FYI Kenne Bell is a SC kit company and they use Autorotor superchargers for their kits. I think they use a 1.7 liter blower for the Mustang Cobra kit. I know they use the 1.7 for their non-cobra mustang kits. I had thought of using the Autorotor but I don't think they are sold as units in the US. Whipple claims that their blower is the best in the world anyway. I think also that Eaton makes all the screws to complicate matters even more.
Andy K