My dyno chart from this weekend.
08-05-03, 09:05 PM
#26
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Originally posted by RETed
Hmmm...that's not an especially wild port.  You did a recent compression test?
-Ted
Hmmm...that's not an especially wild port.  You did a recent compression test?
-Ted
08-05-03, 09:18 PM
#27
I don't know dyno- so excuse my ignorance,
What is that box for "ratio" that says 4.330?
If it was set-up to correct for torque multiplication w/ a 4.33 rear and 1:1 (4th gear) drivetrain, then 4.10 rear end (stock TII) would provide less torque multiplication AND get corrected lower by the dyno thinking it is 4.33 rear. I know just having larger diameter tires can show as lower torque value on a dyno...
Just scrathing for something here- not that I think your #s are so low.
And your extreme RPM peak torque and lack of HP drop- was the dyno reading vehicle RPM from your ignition? Or mechanically converted from dyno rollers? Very smooth curves on that graph... Same ratio correction scenario as above?
What is that box for "ratio" that says 4.330?
If it was set-up to correct for torque multiplication w/ a 4.33 rear and 1:1 (4th gear) drivetrain, then 4.10 rear end (stock TII) would provide less torque multiplication AND get corrected lower by the dyno thinking it is 4.33 rear. I know just having larger diameter tires can show as lower torque value on a dyno...
Just scrathing for something here- not that I think your #s are so low.
And your extreme RPM peak torque and lack of HP drop- was the dyno reading vehicle RPM from your ignition? Or mechanically converted from dyno rollers? Very smooth curves on that graph... Same ratio correction scenario as above?
08-05-03, 09:36 PM
#28
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Originally posted by BLUE TII
I don't know dyno- so excuse my ignorance,
What is that box for "ratio" that says 4.330?
If it was set-up to correct for torque multiplication w/ a 4.33 rear and 1:1 (4th gear) drivetrain, then 4.10 rear end (stock TII) would provide less torque multiplication AND get corrected lower by the dyno thinking it is 4.33 rear. I know just having larger diameter tires can show as lower torque value on a dyno...
Just scrathing for something here- not that I think your #s are so low.
And your extreme RPM peak torque and lack of HP drop- was the dyno reading vehicle RPM from your ignition? Or mechanically converted from dyno rollers? Very smooth curves on that graph... Same ratio correction scenario as above?
I don't know dyno- so excuse my ignorance,
What is that box for "ratio" that says 4.330?
If it was set-up to correct for torque multiplication w/ a 4.33 rear and 1:1 (4th gear) drivetrain, then 4.10 rear end (stock TII) would provide less torque multiplication AND get corrected lower by the dyno thinking it is 4.33 rear. I know just having larger diameter tires can show as lower torque value on a dyno...
Just scrathing for something here- not that I think your #s are so low.
And your extreme RPM peak torque and lack of HP drop- was the dyno reading vehicle RPM from your ignition? Or mechanically converted from dyno rollers? Very smooth curves on that graph... Same ratio correction scenario as above?
08-05-03, 09:48 PM
#29
I believe HP would be ~ the same since it is work done, but torque would be corrected for the 4.33:1 whereas you are only getting lower 4.10:1 multiplication factor
This would make torque read low on dyno.
If the RPMs were done the same way (mechanically off dyno rollers) then that sure does explain a lot...
Did you rev it out to your vehicles rpm cut (8,000?) in the actual vehicle? Did the dyno show the car rev-ing to rpm cut? Beyond?
If your HP was really climbing all the way to 7,800rpm and not dropping you should rev it out to 9,000rpm
This would make torque read low on dyno.
If the RPMs were done the same way (mechanically off dyno rollers) then that sure does explain a lot...
Did you rev it out to your vehicles rpm cut (8,000?) in the actual vehicle? Did the dyno show the car rev-ing to rpm cut? Beyond?
If your HP was really climbing all the way to 7,800rpm and not dropping you should rev it out to 9,000rpm
08-06-03, 06:45 AM
#31
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Originally posted by BLUE TII
I believe HP would be ~ the same since it is work done, but torque would be corrected for the 4.33:1 whereas you are only getting lower 4.10:1 multiplication factor
This would make torque read low on dyno.
If the RPMs were done the same way (mechanically off dyno rollers) then that sure does explain a lot...
Did you rev it out to your vehicles rpm cut (8,000?) in the actual vehicle? Did the dyno show the car rev-ing to rpm cut? Beyond?
If your HP was really climbing all the way to 7,800rpm and not dropping you should rev it out to 9,000rpm
I believe HP would be ~ the same since it is work done, but torque would be corrected for the 4.33:1 whereas you are only getting lower 4.10:1 multiplication factor
This would make torque read low on dyno.
If the RPMs were done the same way (mechanically off dyno rollers) then that sure does explain a lot...
Did you rev it out to your vehicles rpm cut (8,000?) in the actual vehicle? Did the dyno show the car rev-ing to rpm cut? Beyond?
If your HP was really climbing all the way to 7,800rpm and not dropping you should rev it out to 9,000rpm
My car did hit the limiter at 8,000 rpms. The dyno guy told me the dyno will accually cut out a little before 8,000rpms though.
The car did pull all the way to 8k rpms and still seemed as if it could go higher. Maybe if I grow enough ***** I'll take her to 9k.
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