ISFer

iTrader: (2)

Sounds good to me, TD...Physics nothwithstanding, the hp has to get to the ground quicker and easier with lighter wheels.

Tho the hp wasn't really bumped, the lighter rotating mass effects a quicker car.

Colin.

timeToy

iTrader: (11)

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

caymandive

iTrader: (2)

Excellent work Timetoy! The numbers looks solid.

ExclusivIS

iTrader: (9)

Nice Time! Those are awesome numbers!

Can you actually "feel" the power difference? Is it noticeable?

cm09578

iTrader: (10)

Wow....Go Joe Z!!!!!!!

LexISguy

greats numbers Timetoy can you feel the diffrerence? What would the numbers be to the crank?

FPR1939

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

MHP

Jerome,
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

ISFer

iTrader: (2)

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.

ISFer

iTrader: (2)

Let us know your SOP impressions please. Got to be noticeable.....

C.

LexISguy

447hp a 31hp gain over stock to the engine thats a good number. How about ft lbs pounds of torque to the engine?

Supraman16

iTrader: (5)

I'm wondering what would cause the car to run rich with the JoeZ intake pipe. Anyone have any ideas?

houstonT

It's actually leaner with the Joe Z intake pipe.
Peter

ToothDoc

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!!!

lobuxracer

iTrader: (2)

If that were the case it would only last a few minutes at best. The primary O2 sensors are wideband, not narrowband, and there are a/f targets based on load. The MAF give a primary input for injector pulsewidth, but it is corrected by short term and long term fuel trim based on observed a/f compared to anticipated a/f. So, unless the change put the correction factor all the way to the +20% limit, the ECM would just retune the correction and apply it to all fuel values - even at WOT - because despite running open loop at WOT, the LT + ST fuel trim values still get applied.