Previous Thread
Next Thread
Print Thread
Page 3 of 3 1 2 3
Re: ...speaking of dynos, going Thursday FULL RESULTS [Re: earthmover] #890064
01/04/11 03:06 PM
01/04/11 03:06 PM
Joined: Jan 2003
Posts: 3,031
Erda, UT
67Charger Offline OP
master
67Charger  Offline OP
master

Joined: Jan 2003
Posts: 3,031
Erda, UT
I beleive it is RATED at 291@.600, but I forget exactly. I also think it is a bit optomistic.


11.33 @ 118.46 on motor
10.75 @ 125.35 w/ a little spray
Now, high Speed Open Road Racing - Silver State Classic Challenge, Nevada Open Road Challenge, Big Bend Open Road Race
Rocky Mountain Race Week 2020, 2022 2.0, Sick Week 2023
Re: ...speaking of dynos, going Thursday FULL RESULTS [Re: 67Charger] #890065
01/04/11 03:13 PM
01/04/11 03:13 PM
Joined: Jan 2003
Posts: 26,429
United Socialist States of Ame...
T
tboomer Offline
Too Many Posts
tboomer  Offline
Too Many Posts
T

Joined: Jan 2003
Posts: 26,429
United Socialist States of Ame...
Pretty good results,there!! Here is an excellent read from the tech archive about RPM heads by Dwayne Porter. Some good reading!
http://www.moparts.org/Tech/Archive/bb/11.html


Need your rear end checked out? Contact Grizzly!!
Re: ...speaking of dynos, going Thursday FULL RESULTS [Re: tboomer] #890066
01/04/11 03:23 PM
01/04/11 03:23 PM
Joined: Aug 2006
Posts: 760
Texas
T
TexasStroker Offline
mopar addict
TexasStroker  Offline
mopar addict
T

Joined: Aug 2006
Posts: 760
Texas
Great numbers and vids!


Founder, Amarillo Area Mopars & Lone Star Mopars Amarillo Area Mopars Lone Star Mopars Chryslers in the Canyon: All Mopar Event!
Re: ...speaking of dynos, going Thursday FULL RESULTS [Re: TexasStroker] #890067
01/04/11 03:50 PM
01/04/11 03:50 PM
Joined: Aug 2007
Posts: 2,449
nc
E
earthmover Offline
top fuel
earthmover  Offline
top fuel
E

Joined: Aug 2007
Posts: 2,449
nc
nice #s . will be a nice ride aswell..mike

Re: ...speaking of dynos, going Thursday FULL RESULTS [Re: 67Charger] #890068
01/04/11 05:09 PM
01/04/11 05:09 PM
Joined: Jan 2003
Posts: 10,766
Central Valley, CA.
Quicksilver440 Offline
I Live Here
Quicksilver440  Offline
I Live Here

Joined: Jan 2003
Posts: 10,766
Central Valley, CA.
Quote:

I beleive it is RATED at [Email]291@.600[/Email], but I forget exactly. I also think it is a bit optomistic.




Yep...I think most people are seeing about 275@.600 out of the box....by they advertise 290 or so.

Re: ...speaking of dynos, going Thursday FULL RESULTS [Re: 67Charger] #890069
01/17/11 09:44 PM
01/17/11 09:44 PM
Joined: Jan 2003
Posts: 14,545
So. Burlington, Vt.
F
fast68plymouth Offline
I Live Here
fast68plymouth  Offline
I Live Here
F

Joined: Jan 2003
Posts: 14,545
So. Burlington, Vt.
i'll throw my .02 about the surge......IMO....it aint the exhaust duration.

it sounds like the dyno load valve was reaching the end of its travel at the upper end of the pull.
this is often an issue with an SF dyno when you have a large cube/high torque motor and try and make pulls from a relatively low starting rpm, and try to make pulls that extend over 2500rpm.
the absorber isnt that efficient at lower rpms, so you need to run a lot of water through it to hold the load.
as the rpm rises, the efficiency rises very quickly, and the load valve has to open way up to get rid of that extra water, and you run out of travel on the valve at a reasonably low rpm.
if you start a few hundred rpm higher(where the absorber is more efficient), you can restrict the inlet water flow, which will generally allow you to run to a noticably higher rpm before the servo valve gets near the end of its travel.

if it wasnt a load control issue, then my vote would be for some sort of valvetrain dynamic issue(looking at how steeply the TQ curve falls off the last few hundred rpm).


in any case....those are quite good results from that basic combo.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Page 3 of 3 1 2 3






Powered by UBB.threads™ PHP Forum Software 7.7.1