LTH = Installed, Review

F.I. Inc.

Trust me your wheel speed in 5th is nowhere near 200 MPH. It is not even that close to 150 MPH. Your car needs to be dyno tested in 5th gear because 5th gear is your 1:1 gear ratio on this specific car with the 6MT. Your numbers are going to be lower in 4th and you will no generate as much wheel speed. Your car is under more of a load in 5th as well.

As far as some people saying the ECU does not need time to learn the new mod, they are WRONG. Miles put on the car are an adjustment period as well as multiple runs on the dyno. The ECU cycles constantly and whatever the cycle period it is in terms of miles is the adjustment period. I have done over 100 dyno pulls with the 370Z alone and on over 5 different cars. I have seen the pattern I just explained above formed on all of them.

I am confident that once you go back to the dyno and they dyno the car in the correct gear (5th) along with 6-8 pulls you will see the difference. Kyle @ Stillen and I do not agree on much but the one area where there is no argument is the multiple dyno pull method. I have applied it to all of the dyno testing we have done and it works.

Tony

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Daishi

You gonna give the car some time to learn then re dyno?

Chris@FsP

The ecu only 'learns' in closed-loop mode, which is only used for idle/low load/cruise conditions. During acceleration, deceleration, and WOT (wide open throttle), the ecu relies on its pre-programmed fuel and ignition tables. That's why products like Osiris and Accessport exist, to reprogram what the ecu does at WOT.

UFreefer

That's good to know, I asked this question here the other day: How do you do a proper dyno comparison?

Funny how opinions and wrong info can turn into fact on message boards. Several people in other threads have been saying that the car will get faster and dyno higher after 20-60 miles. Which led me to start that thread. Dynoing would be a real pain if you to drive it around for awhile after each mod.

Daishi

So then why after a modification That hasn't been given time on the car power increases with each pull.

Chris@FsP

I haven't personally seen this trend first hand. I will, however, test this out in a couple of days when I dyno a customers 370Z. We already have baseline dyno's that were ran well after the mods were installed. If the ecu had adjusted for them in open loop, it would have been reflected on those pulls. Before I do these next set of pulls, I will reset the long term fuel settings. If what you are saying is correct, then I should, theoretically, lose power.

If I'm wrong, I'll gladly come back here and eat crow

semtex

I got the nut off. Install almost complete now.

__________________
"There are no small accidents on this circuit." -- Ayrton Senna
316.8whp & 248 ft/lbs (Dyno Dynamics) | 319whp & 256 ft/lbs (DynoJet) (04/23/10)
Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.

Chris@FsP

UFreefer

Nice, What did you use to get it off?

m4a1mustang

His hands and some elbow grease

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semtex

I'll cover this when I do my full review.

__________________
"There are no small accidents on this circuit." -- Ayrton Senna
316.8whp & 248 ft/lbs (Dyno Dynamics) | 319whp & 256 ft/lbs (DynoJet) (04/23/10)
Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.

BOLIO 671

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2013 Nismo Z34 / FI TT #091 / IG: @lilzilla_z34

semtex

Install complete. Making quick teaser vid for you guys now. Full review will follow. Dyno and re-tune (if necessary) scheduled for Fri. morning.

__________________
"There are no small accidents on this circuit." -- Ayrton Senna
316.8whp & 248 ft/lbs (Dyno Dynamics) | 319whp & 256 ft/lbs (DynoJet) (04/23/10)
Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.

NYBladeZ

wouldn't the "pedal trick" reset the ECU and have it relearn in about 50-100 miles?

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2009 Carbon Fiber/Red 370z aka Trish: Sports Package, Meisterschaft full catback, Fast Intentions Longtube Headers, Injen Long Tube Intakes, UpRev Tune: Sold
2008 Lotus Exige S Club Racer aka Bella, always leaves me smiling

semtex

Vid posted. You can view it here -> Semtex's Monterey Blue 370Z

__________________
"There are no small accidents on this circuit." -- Ayrton Senna
316.8whp & 248 ft/lbs (Dyno Dynamics) | 319whp & 256 ft/lbs (DynoJet) (04/23/10)
Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.