Torque Curve Dyno comparison: turbo vs Centrifugal
11-30-2005, 12:59 PM
#31
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But we have to take gearing into account 
Originally Posted by James-man
Sure you can compare. Get Mark's car on the freeway at 65mph in 5th gear. Get any of the others on the freeway at 65 mph in 5th gear. Drivers glance at each other and before even thinking about downshifting (and without downshifting) punch it. Mark walks away from any of them.
The left behind driver wants rematch. Both cars start in 3rd at cruising speed. Mark probably gets left behind.
Mark wants rematch. 4th gear at crusing. ??????
Assuming Mark likes to play, he won't get caught with his pants down.
The left behind driver wants rematch. Both cars start in 3rd at cruising speed. Mark probably gets left behind.
Mark wants rematch. 4th gear at crusing. ??????
Assuming Mark likes to play, he won't get caught with his pants down.
11-30-2005, 01:03 PM
#32
Race Car
Originally Posted by A.Wayne
Yeah but the S4 motor is considerable bigger than the others and this was not an attempt to put DOWN THE 928 MOTOR ! BUT JUST TO STATE THAT IN MY PROFESSIONAL OPINION , A 928 MOTOR PREPARED IN THE SAME MANNER AS THE OTHERS SHOULD OR WOULD PRODUCE MORE POWER FOR THE
SAME SETUP AS IN proper fueling ( mapping ) and correct turbo sizing etc.
I WOULD EXPECT TO SEE 650 WHP@ 1 BAR ( TURBO, SORRY SC GUY'S)
The S4 engine would be the perfect candidate and is a hell of a motor !
WAYNE
WWW.TPGPRODUCTS.COM
SAME SETUP AS IN proper fueling ( mapping ) and correct turbo sizing etc.
I WOULD EXPECT TO SEE 650 WHP@ 1 BAR ( TURBO, SORRY SC GUY'S)
The S4 engine would be the perfect candidate and is a hell of a motor !
WAYNE
WWW.TPGPRODUCTS.COM
We know of a fellow that intends to do such a thing. Twin Turbo. You should chat with Herr Kuhn.
11-30-2005, 01:04 PM
#33
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Ok james ,
Marks is in 5th and punches it and i down shift to 3 rd and put 7 cars on him ,
what;s the point ? that the v8 torque is good , of course and that is what v8 guy's like , does not make for a faster car just one that you like. We are straying here !
Just a thought to say that i believe that the S4 potential is untapped.
wayne
www.tpgproducts.com
Marks is in 5th and punches it and i down shift to 3 rd and put 7 cars on him ,
what;s the point ? that the v8 torque is good , of course and that is what v8 guy's like , does not make for a faster car just one that you like. We are straying here !
Just a thought to say that i believe that the S4 potential is untapped.
wayne
www.tpgproducts.com
11-30-2005, 01:09 PM
#34
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Let's assume a 3.0 911SC with 182chp (154.7rwhp) stock.
At 1 Bar = 14.5037738 psi, we are looking at 15-20 CHP per pound of boost. That's between 217.56 and 290.075 CHP added per each 1 bar of boost. Not sure what 911SC losses are, but let's assume 15%. So at 1 Bar we've got between 184.88 RWHP and 246.56 RWHP gained by boost. Add them to stock (154.7rwhp) and you get:
154.7 + 184.88 = 339.58 RWHP min and
154.7 + 246.56 = 401.26 RWHP max
Is my math wrong? There's a good chance it is
At 1 Bar = 14.5037738 psi, we are looking at 15-20 CHP per pound of boost. That's between 217.56 and 290.075 CHP added per each 1 bar of boost. Not sure what 911SC losses are, but let's assume 15%. So at 1 Bar we've got between 184.88 RWHP and 246.56 RWHP gained by boost. Add them to stock (154.7rwhp) and you get:
154.7 + 184.88 = 339.58 RWHP min and
154.7 + 246.56 = 401.26 RWHP max
Is my math wrong? There's a good chance it is
11-30-2005, 01:13 PM
#35
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Just saw this 
Originally Posted by A.Wayne
Hello Heinrich,
I was describing a 911 turbo CIS car 3.3L we where talking turbos here.
not SC 's etc.
the Cobra mustang also Describe making 315 whp is a NA car not SC .
stock with DTA, Exhaust and pullies . completly stock they make 245 whp max
Wayne
www.tpgproducts.com
I was describing a 911 turbo CIS car 3.3L we where talking turbos here.
not SC 's etc.
the Cobra mustang also Describe making 315 whp is a NA car not SC .
stock with DTA, Exhaust and pullies . completly stock they make 245 whp max
Wayne
www.tpgproducts.com
11-30-2005, 01:19 PM
#37
Captain Obvious
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Originally Posted by A.Wayne
1.4 bar??????? WOOOOOOW That's a lot of boost. How can you guarantee longevity with that kind of pressure? A +700hp motor that can last a long time will cost some serious coin to build.
11-30-2005, 01:22 PM
#38
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A.Wayne....
Sounds to me like you are setting up the Rennlist "Shark Crowd" to sell us some of your engine management electronics to better "tap" the potential of the V8's! If that is the case and you are developing something we could use - GET R DONE! And - tell us more!
Nonetheless - if you're gonna "hawk your wares" here, it would be nice if you were at LEAST a paying R'list member - or - better still - a Sponsor!
(A word of advice....before the Admins catch it and slap your hands- you need to remove the link to your commercial website in your sig!)
Sounds to me like you are setting up the Rennlist "Shark Crowd" to sell us some of your engine management electronics to better "tap" the potential of the V8's! If that is the case and you are developing something we could use - GET R DONE! And - tell us more!
Nonetheless - if you're gonna "hawk your wares" here, it would be nice if you were at LEAST a paying R'list member - or - better still - a Sponsor!
(A word of advice....before the Admins catch it and slap your hands- you need to remove the link to your commercial website in your sig!)
11-30-2005, 01:22 PM
#39
Captain Obvious
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Originally Posted by A.Wayne
11-30-2005, 01:26 PM
#40
v8 torque is good , of course and that is what v8 guy's like , does not make for a faster car just one that you like.
11-30-2005, 01:33 PM
#41
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OK below are revised numbers then for a 964 turbo II, the hottest 911 3.3 turbo out there (stock):
Originally Posted by heinrich
Let's assume a 3.3 964 turbo II with 320 chp (272rwhp) stock.
At 1 Bar = 14.5037738 psi, we are looking at 15-20 CHP per pound of boost. That's between 217.56 and 290.075 CHP added per each 1 bar of boost. Not sure what 964 losses are, but let's assume 15%. So at 1 Bar we've got between 184.88 RWHP and 246.56 RWHP gained by boost. Add them to stock (272rwhp) and you get:
272 + 184.88 = 456.88 RWHP min and
272 + 246.56 = 518.56 RWHP max
Is my math wrong? There's a good chance it is
At 1 Bar = 14.5037738 psi, we are looking at 15-20 CHP per pound of boost. That's between 217.56 and 290.075 CHP added per each 1 bar of boost. Not sure what 964 losses are, but let's assume 15%. So at 1 Bar we've got between 184.88 RWHP and 246.56 RWHP gained by boost. Add them to stock (272rwhp) and you get:
272 + 184.88 = 456.88 RWHP min and
272 + 246.56 = 518.56 RWHP max
Is my math wrong? There's a good chance it is
11-30-2005, 01:34 PM
#42
Rennlist Member
We have built quite a few 911Tubos, including TT and your 458 rwhp single turbo at 7 psi is quite a bit higher that anything I have ever seen! Seems way out of line .... why the big difference? Wath was the engines hp in a NA form? HAd to be over 300 rwhp or over 100 hp per liter NA.
11-30-2005, 01:35 PM
#43
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And a 964 is not CIS stock either. CIS cars made literally 100's of horses less than that. Wayne i want to believe you but the math seems not to bear it out, can you assist?
11-30-2005, 01:37 PM
#44
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Originally Posted by Jim Nowak
More torque does make your car faster. horsepower = torque X rpm/5252
Not the HP vs. Torque controversy again!!!