 
Main Menu
|
|
Nevada Classics
|
|
Advertise at CC
|
| S |
M |
T |
W |
T |
F |
S |
| |
|
|
1 |
2 |
3 |
4 |
| 5 |
6 |
7 |
8 |
9 |
10 |
11 |
| 12 |
13 |
14 |
15 |
16 |
17 |
18 |
| 19 |
20 |
21 |
22 |
23 |
24 |
25 |
| 26 |
27 |
28 |
29 |
30 |
31 |
|
|
|
CC Advertisers
|
|
10-30-2007, 12:20 PM
|
|
CC Member
|
|
|
Join Date: May 2005
Location: la,
ca
Cobra Make, Engine: spf, stroked 460
Posts: 94
|
|
Not Ranked
dynoed the car, but where is all my power going
on the engine dyno car made 660 hp and 678tq, after the 1k mile break in
had the car on chassis dyno with my spiral turbo side pipe modification. I also had the end cork cut for extra hp. The car put down 532hp and 519tq
Isn't that lot of power loss? I thought the spiral turbo side pipes were gonna free up lot of power? Should I change the pipes again?
Last edited by cobra crazee; 10-30-2007 at 12:46 PM..
|
10-30-2007, 12:23 PM
|
|
CC Member
|
|
|
Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
|
|
Not Ranked
Consider yourself lucky....most guys lose over 20% through sidepipes and drivetrain losses.
Your example is out of the ordinary and is almost hard to believe.
|
10-30-2007, 12:29 PM
|
 |
CC Member
|
|
|
Join Date: Aug 2004
Location: SE Wisconsin,
Wi
Cobra Make, Engine: Arntz/SBC/Jag
Posts: 1,033
|
|
Not Ranked
What he said !
|
10-30-2007, 12:29 PM
|
 |
CC Member
|
|
|
Join Date: May 2000
Location: Northern VA,
VA
Cobra Make, Engine: Classic Roadsters
Posts: 2,765
|
|
Not Ranked
Those spiral inserts are real power killers. Do a search.
.
__________________
LIFE IS TOO SHORT TO WORRY ABOUT GOOD GAS MILEAGE
________
Utinam logica falsa tuam philosophiam totam suffodiant!
________
|
10-30-2007, 12:35 PM
|
|
CC Member
|
|
|
Join Date: Feb 2003
Location: Morgan Hill,
CA
Cobra Make, Engine: SPF 2293, Roush 427R-228
Posts: 298
|
|
Not Ranked
That's only a 5% loss, thats rediculously good. As mentioned its almost hard to beleive. Most cars are in the 10-15% range, and most Cobras are in the 15-20% range.
What brand dyno was used?
|
10-30-2007, 12:41 PM
|
 |
CC Member
|
|
|
Join Date: May 2004
Location: Palm Coast,
FL
Cobra Make, Engine: Shelby American CSX 4241 - authentically built
Posts: 2,573
|
|
Not Ranked
Quote:
|
Originally Posted by cobra crazee
on the engine dyno car made 660 hp and 678tq, after the 1k mile break in
had the car on chassis dyno with my spiral turbo side pipe modification. I also had the end cork cut for extra hp. The car put down 632hp and 619tq
Isn't that lot of power loss? I thought the spiral turbo side pipes were gonna free up lot of power? Should I change the pipes again?
|
As a dyno owner and tuner, I would almost have to question your numbers, as being exceptionally too close together. Most Cobras I've dynoed that have made 650 on an engine dyno, put about 450-500 on a chassis dyno. A VERY good sidepipe setup will free up a ton of power that Cobras eat up, but you've still got parasitic drivetrain loss. That in itself should be a good 12-15% if you've got a stick with IRS.
Something doesn't seem right.
__________________
Sal Mennella
CSX 4241, KMP 357 - sold and missed, CSX 4819 - cancelled, FFR 5132 - sold
See my car at CSXinfo.net here >> CSX 4241
|
10-30-2007, 12:45 PM
|
|
CC Member
|
|
|
Join Date: Oct 2006
Location: McLeansboro,
Il
Cobra Make, Engine: LA Exotic
Posts: 235
|
|
Not Ranked
I would give up wife and kids for a 5% parasitic driveline loss!!!!!!! Wife and kids all in good shape by the way.
|
10-30-2007, 12:45 PM
|
 |
Renegade Nuns on Wheels
|
|
|
Join Date: Aug 2001
Location: columbus,
Oh
Cobra Make, Engine: Unique 427 roadster with 351C-4B
Posts: 5,129
|
|
Not Ranked
Shoot, that kind of power loss is bragging rights. Of course, no one will beleive you   |
10-30-2007, 12:47 PM
|
|
CC Member
|
|
|
Join Date: May 2005
Location: la,
ca
Cobra Make, Engine: spf, stroked 460
Posts: 94
|
|
Not Ranked
guys im an idiot
i just fixed my mistake its 532hp on chassis dyno not 632
|
10-30-2007, 01:02 PM
|
|
CC Member
|
|
|
Join Date: Oct 2006
Location: McLeansboro,
Il
Cobra Make, Engine: LA Exotic
Posts: 235
|
|
Not Ranked
Guess I am stuck with the wife and kids...20% loss a bit over average but still not too bad..
|
10-30-2007, 01:03 PM
|
|
CC Member
|
|
|
Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
|
|
Not Ranked
Ah, that's better. That's 20% loss....which is about average I think.
|
10-30-2007, 01:07 PM
|
|
CC Member
|
|
|
Join Date: May 2004
Location: Palm Coast,
FL
Cobra Make, Engine: Shelby American CSX 4241 - authentically built
Posts: 2,573
|
|
Not Ranked
Quote:
|
Originally Posted by cobra crazee
i just fixed my mistake its 532hp on chassis dyno not 632
|
Okay then, that's much better. Sounds like you are right on the mark. Nothing to worry about.
__________________
Sal Mennella
CSX 4241, KMP 357 - sold and missed, CSX 4819 - cancelled, FFR 5132 - sold
See my car at CSXinfo.net here >> CSX 4241
|
10-30-2007, 01:18 PM
|
|
Renegade Nuns on Wheels
|
|
|
Join Date: Aug 2001
Location: columbus,
Oh
Cobra Make, Engine: Unique 427 roadster with 351C-4B
Posts: 5,129
|
|
Not Ranked
Now that sounds about right!
|
10-30-2007, 03:07 PM
|
|
CC Member
|
|
|
Join Date: May 2005
Location: la,
ca
Cobra Make, Engine: spf, stroked 460
Posts: 94
|
|
Not Ranked
my disapointment is I spent like 1k with parts, labor, and recoating and its putting the same power as my stock spf. What are you guys running? do you have before and after dyno results?
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
All times are GMT -7. The time now is 09:36 AM.
Links monetized by VigLink
|
Linear Mode
