Dundon GT4/Spyder Race Header Group Buy
#691
#693
Interesting result with the specific dyno setup. The question is...what speeds does the setup simulate? As in will this power gain occur at vehicle speeds only above a certain MPH? I believe the ram air effect based on rules of thumb I've seen is so marginal that I doubt that much is gained from that aspect.
#694
Accel junky: this is all done in 4th gear.. I think also simulating cold air on a dyno is diffucult, doing it in the wild is much much easier to get cold air. I still believe on the street the power is more! It feels more. It doesn't feel lethargic under 5k now, it feels powerful all the way from 3k to redline.
I would also like to add another impressive point: this system has ZERO drone with valves on or OFF. Believe it or not valves closed even sounds quieter than stock for some reason!
I would also like to add another impressive point: this system has ZERO drone with valves on or OFF. Believe it or not valves closed even sounds quieter than stock for some reason!
#695
#696
I can see your dyno sheet now.. but!
Why are they using STD and not SAE correction. That alone could be delivering the higher/inflated numbers. (I believe +3% with STD)
-Strange overlay that doesn't show 5250 x (RPM missing)
-You should ask your shop to send you the #'s in SAE..
-Curious to hear why your speed shop would dyno and not use the more accurate SAE correction..
Why are they using STD and not SAE correction. That alone could be delivering the higher/inflated numbers. (I believe +3% with STD)
-Strange overlay that doesn't show 5250 x (RPM missing)
-You should ask your shop to send you the #'s in SAE..
-Curious to hear why your speed shop would dyno and not use the more accurate SAE correction..
#698
I can see your dyno sheet now.. but!
Why are they using STD and not SAE correction. That alone could be delivering the higher/inflated numbers. (I believe +3% with STD)
-Strange overlay that doesn't show 5250 x (RPM missing)
-You should ask your shop to send you the #'s in SAE..
-Curious to hear why your speed shop would dyno and not use the more accurate SAE correction..
Why are they using STD and not SAE correction. That alone could be delivering the higher/inflated numbers. (I believe +3% with STD)
-Strange overlay that doesn't show 5250 x (RPM missing)
-You should ask your shop to send you the #'s in SAE..
-Curious to hear why your speed shop would dyno and not use the more accurate SAE correction..
#702
I can see your dyno sheet now.. but!
Why are they using STD and not SAE correction. That alone could be delivering the higher/inflated numbers. (I believe +3% with STD)
-Strange overlay that doesn't show 5250 x (RPM missing)
-You should ask your shop to send you the #'s in SAE..
-Curious to hear why your speed shop would dyno and not use the more accurate SAE correction..
Why are they using STD and not SAE correction. That alone could be delivering the higher/inflated numbers. (I believe +3% with STD)
-Strange overlay that doesn't show 5250 x (RPM missing)
-You should ask your shop to send you the #'s in SAE..
-Curious to hear why your speed shop would dyno and not use the more accurate SAE correction..
#704
Has anybody taken the time to test the other brands header using all the DMS specific procedures for dyno testing? Also, the before and after should be done using the same method so any HP gain is under the same conditions....my before/after dyno were definitely not done using the DMS procedures so I can't compare these dyno tests with mine.
#705
Has anybody taken the time to test the other brands header using all the DMS specific procedures for dyno testing? Also, the before and after should be done using the same method so any HP gain is under the same conditions....my before/after dyno were definitely not done using the DMS procedures so I can't compare these dyno tests with mine.