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Chassis Dyno Results!
#693187
05/09/10 01:54 PM
05/09/10 01:54 PM
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Joined: Feb 2006
Posts: 39
Biloxi, MS.
DusterMel
OP
member
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OP
member
Joined: Feb 2006
Posts: 39
Biloxi, MS.
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It's been a long time coming, but finaly getting to where I can see the light at the end of the tunel. 439cid W9's R3 block built by Ryan J car weights 2760 with Me in it. still have door panels carpet sail panels etc. shouldn't be more than 2810 complete... First pull just ran it up to 7200 RPM Bam 640HP on the board. It was Fat as Hell rejetted the carb, pulled it to 7600 RPM 660HP. Wanted to try some super slick BRISK Racing spark plugs, changed noting but the plugs and it picked up 2 HP, so were at 662HP still running rich. So removed both power valves jetted up 4#'s and ran it up to 7800 RPM 675HP it made it's peak power on all the pulls between 7300-7500 RPM's Max Torque 523 I think there is still more left in it, didn't play with the timing at all. We set it at 36 Degrees and never touched it again. Hell it was almost midnight so we called it a night. Going to be running the car in some 5.70 Index races and wherever I can fit in. Running on MT 315/60/15 Radials and Ladder bars.
Thanks Ryan your the Man!!! also Thanks to SB412 for Killer chassis ingenuity on the car...
440 cid sb 75 Duster.
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Post deleted by Defbob
[Re: DusterMel]
#693191
05/09/10 02:31 PM
05/09/10 02:31 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Re: Chassis Dyno Results!
[Re: DusterMel]
#693194
05/09/10 02:56 PM
05/09/10 02:56 PM
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Joined: May 2006
Posts: 740
WA
JD Dart
super stock
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super stock
Joined: May 2006
Posts: 740
WA
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Very nice numbers that car should fly. Your going to have to slow it down for 5.70 index
best so far 8.53 @ 158.59 MPH 60'1.240
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Re: Chassis Dyno Results!
[Re: DusterMel]
#693195
05/09/10 03:02 PM
05/09/10 03:02 PM
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Joined: Jan 2003
Posts: 17,918
Akron, Ohio
ProSport
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 17,918
Akron, Ohio
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Very nice Duster! Good luck with it.
1970 Challenger, all aluminum 528 Hemi, HDK suspension, Tremec 5 speed manual
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Re: Chassis Dyno Results!
[Re: DusterMel]
#693201
05/09/10 04:20 PM
05/09/10 04:20 PM
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Joined: Dec 2007
Posts: 10,542
BROOK PARK, OH
WILD BILL
Senior Member of the Junior Dragster Club
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Senior Member of the Junior Dragster Club
Joined: Dec 2007
Posts: 10,542
BROOK PARK, OH
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Quote:
789HP at the fly wheel on Ryans Dyno.
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Re: Chassis Dyno Results!
[Re: WILD BILL]
#693202
05/09/10 04:53 PM
05/09/10 04:53 PM
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Joined: Jan 2003
Posts: 8,547
State College, PA
RyanJ
moparts member
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moparts member
Joined: Jan 2003
Posts: 8,547
State College, PA
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Quote:
Quote:
789HP at the fly wheel on Ryans Dyno.
It made 789 @ 7400 RPM on the SF901. See attachment....
So looks like chassis dyno is showing ~ 14% drivetrain loss, or since I don't like to use percentrages when dealing W/ chassis dyno #'s, because % will vary wildly depending on HP of motor... 114 HP loss through drivetrain... "most people" claim 18-20% drivetrain loss on chassis dyno, but those #'s are not accurate.... 18% loss on a 400 HP motor & 18% loss on a 1000 HP motor are going to be wildly different.. & yet the chassis could be exact same, so percentages are not right when looking @ chassis dyno #'s
Melvin, closet vehicle weight/dyno #'s I have off that dyno for comparison would be:
2713 LBS/ 739 HP ran 8.82 @ 152 in mineshaft air. Normally 8.90-9.0 149 MPH range. So if you end up in the 2800 range... you'll be right in that area... probably 8.80/90's when sorted out.
Congrats on finally getting it together....
OH BTW, it's 14.2:1 & off top of my head cam is like 274/278 @ .050" & ~ .760" lift W/ 1.7 rockers.
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Re: Chassis Dyno Results!
[Re: DusterMel]
#693203
05/09/10 04:55 PM
05/09/10 04:55 PM
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Joined: Jan 2005
Posts: 3,635
Oakland, MI
dizuster
master
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master
Joined: Jan 2005
Posts: 3,635
Oakland, MI
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I remember this motor now. 439", hogged W9's, good sized roller, vacuum pump, etc...
Stout piece!
15% loss of 789 would be 670hp, so both dyno's correlate with each other. My guess is that Ryan's is a little low though, and it's probably more then 15% loss through an automatic...
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Re: Chassis Dyno Results!
[Re: RyanJ]
#693205
05/09/10 05:43 PM
05/09/10 05:43 PM
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Joined: Feb 2006
Posts: 39
Biloxi, MS.
DusterMel
OP
member
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OP
member
Joined: Feb 2006
Posts: 39
Biloxi, MS.
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Thanks Ryan! Within a month we will see exactly what it's going to run. I'm thinking somewhere in the 80's It sounds Wicked,it's got some babby Crickets in there. Running it whith 3.5 inch Magna Flow Mufflers.
440 cid sb 75 Duster.
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Re: Chassis Dyno Results!
[Re: DusterMel]
#693206
05/09/10 08:44 PM
05/09/10 08:44 PM
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Joined: Jan 2003
Posts: 16,928
NC
440Jim
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,928
NC
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Quote:
It was Fat as Hell rejetted the carb
I know chassis and engine dyno load etc is different, but that seems odd when the engine dyno showed 14 A/F ratio???
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