JoeZ Exhaust + Intake Dyno = +26 RWHP +19 RWTQ SAE
#46
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Holy cow! I have forgotten my physics!! You're correct. However, wouldn't the reduction in inertia of the wheels yield a higher RWP at a dyno? A hub dyno gives a higher HP than a wheel dyno due to intertia and frictional losses. Not because it's actually making more power, but because power is transferred to that giant metal drum with less loss from the wheels itself. Heck, I'd imagine it takes a decent amount of HP to get 40 pounds of rim to spin up to 170 mph.
Tho the hp wasn't really bumped, the lighter rotating mass effects a quicker car.
Colin.
#47
Baseline vs JoeZ Exhaust+Intake = +26 RWHP +19 RWTQ !
Here are the latest developments of my quest for power...
As you avid readers already know, my last dyno run with the JoeZ intake and the Amsoil Air Filter was less than great, with just one little extra HP gained. Pretty quickly it become clear than the Amsoil Air Filter is NOT a great combo for the IS-F, so I went back to the stock Air filter.
Anyway, today I found time to make my way to the dyno for a run... And the results are more in line with expectations...
The A/F ratio are still not perfect, but nothing a ECU tune can't fix...
As always, this is the same dyno, same tech, all accessories are off or physically disconnected...
I am now very happy with the results and will be moving on to the next stage, ECU Tune !
See cya soon...
Here are the conditions:
01 IS-F Baseline : 63.09F, 30.06 in-Hg, Humidity: 38%
05 IS-F JoeZ Exhaust : 81.13F, 30.01 in-Hg, Humidity: 9%
09 IS-F JoeZ Exhaust+Intake : 80.48F, 30.02 in-Hg, Humidity: 14%
And just for kicks, here are the Uncorrected Results:
01 IS-F Baseline : 363.05/349.67
05 IS-F JoeZ Exhaust : 377.33/353.73
09 IS-F JoeZ Exhaust+Intake : 383.37/362.29
As you avid readers already know, my last dyno run with the JoeZ intake and the Amsoil Air Filter was less than great, with just one little extra HP gained. Pretty quickly it become clear than the Amsoil Air Filter is NOT a great combo for the IS-F, so I went back to the stock Air filter.
Anyway, today I found time to make my way to the dyno for a run... And the results are more in line with expectations...
The A/F ratio are still not perfect, but nothing a ECU tune can't fix...
As always, this is the same dyno, same tech, all accessories are off or physically disconnected...
I am now very happy with the results and will be moving on to the next stage, ECU Tune !
See cya soon...
Here are the conditions:
01 IS-F Baseline : 63.09F, 30.06 in-Hg, Humidity: 38%
05 IS-F JoeZ Exhaust : 81.13F, 30.01 in-Hg, Humidity: 9%
09 IS-F JoeZ Exhaust+Intake : 80.48F, 30.02 in-Hg, Humidity: 14%
And just for kicks, here are the Uncorrected Results:
01 IS-F Baseline : 363.05/349.67
05 IS-F JoeZ Exhaust : 377.33/353.73
09 IS-F JoeZ Exhaust+Intake : 383.37/362.29
Last edited by timeToy; 02-19-09 at 07:50 PM.
#52
Pole Position
Assuming that his base run of 349 rwhp relates to 416 crank hp, the drive train losses are about 16.12%. Applying the same drive train losses to his 375 rwhp run would yeild about 447 crank hp.
BTW installing my Joe Z exhaust tonight. Will dyno in the next week or so after installation.
Pat
BTW installing my Joe Z exhaust tonight. Will dyno in the next week or so after installation.
Pat
#53
Here are the latest developments of my quest for power...
As you avid readers already know, my last dyno run with the JoeZ intake and the Amsoil Air Filter was less than great, with just one little extra HP gained. Pretty quickly it become clear than the Amsoil Air Filter is NOT a great combo for the IS-F, so I went back to the stock Air filter.
Anyway, today I found time to make my way to the dyno for a run... And the results are more in line with expectations...
The A/F ratio are still not perfect, but nothing a ECU tune can't fix...
As always, this is the same dyno, same tech, all accessories are off or physically disconnected...
I am now very happy with the results and will be moving on to the next stage, ECU Tune !
See cya soon...
Here are the conditions:
01 IS-F Baseline : 63.09F, 30.06 in-Hg, Humidity: 38%
05 IS-F JoeZ Exhaust : 81.13F, 30.01 in-Hg, Humidity: 9%
09 IS-F JoeZ Exhaust+Intake : 80.48F, 30.02 in-Hg, Humidity: 14%
And just for kicks, here are the Uncorrected Results:
01 IS-F Baseline : 363.05/349.67
05 IS-F JoeZ Exhaust : 377.33/353.73
09 IS-F JoeZ Exhaust+Intake : 383.37/362.29
As you avid readers already know, my last dyno run with the JoeZ intake and the Amsoil Air Filter was less than great, with just one little extra HP gained. Pretty quickly it become clear than the Amsoil Air Filter is NOT a great combo for the IS-F, so I went back to the stock Air filter.
Anyway, today I found time to make my way to the dyno for a run... And the results are more in line with expectations...
The A/F ratio are still not perfect, but nothing a ECU tune can't fix...
As always, this is the same dyno, same tech, all accessories are off or physically disconnected...
I am now very happy with the results and will be moving on to the next stage, ECU Tune !
See cya soon...
Here are the conditions:
01 IS-F Baseline : 63.09F, 30.06 in-Hg, Humidity: 38%
05 IS-F JoeZ Exhaust : 81.13F, 30.01 in-Hg, Humidity: 9%
09 IS-F JoeZ Exhaust+Intake : 80.48F, 30.02 in-Hg, Humidity: 14%
And just for kicks, here are the Uncorrected Results:
01 IS-F Baseline : 363.05/349.67
05 IS-F JoeZ Exhaust : 377.33/353.73
09 IS-F JoeZ Exhaust+Intake : 383.37/362.29
Looking good. We'll take care of the non linear A/F and see what we can add to the gains with v2 ECU/TCU tuning. Thanks for providing A/F data as that will help tremendously in getting you dialed in asap.
Thanks!
Andy
#54
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Those #'s are impressive, timeToy......even with a different base, the gains are more than 26 hp, and 18.5 ft lbs. with Joe's exhaust and intake ( and OEM filter).-- I like that....
Joe's intake does yield a handful of ponies....excellent!
Thanks for posting up the hard #'s.
C.
Joe's intake does yield a handful of ponies....excellent!
Thanks for posting up the hard #'s.
C.
#55
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Assuming that his base run of 349 rwhp relates to 416 crank hp, the drive train losses are about 16.12%. Applying the same drive train losses to his 375 rwhp run would yeild about 447 crank hp.
BTW installing my Joe Z exhaust tonight. Will dyno in the next week or so after installation.
Pat
BTW installing my Joe Z exhaust tonight. Will dyno in the next week or so after installation.
Pat
C.
#56
Lexus Champion
Assuming that his base run of 349 rwhp relates to 416 crank hp, the drive train losses are about 16.12%. Applying the same drive train losses to his 375 rwhp run would yeild about 447 crank hp.
BTW installing my Joe Z exhaust tonight. Will dyno in the next week or so after installation.
Pat
BTW installing my Joe Z exhaust tonight. Will dyno in the next week or so after installation.
Pat
#58
#59
I was thinking that a larger intake diameter where the MAF sensor is located could fool the ECU into thinking that there is actually less air entering so the ECU gives less fuel resulting in a leaner mix? What do you guys think? Otherwise, I don't think a direct replacement of a pipe in the intake (w/o changing filters, etc.) should yield that much improvement - it appears that on some parts of the curve, there is a 10 HP gain!!!
#60
Tech Info Resource
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I was thinking that a larger intake diameter where the MAF sensor is located could fool the ECU into thinking that there is actually less air entering so the ECU gives less fuel resulting in a leaner mix? What do you guys think? Otherwise, I don't think a direct replacement of a pipe in the intake (w/o changing filters, etc.) should yield that much improvement - it appears that on some parts of the curve, there is a 10 HP gain!!!