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Psiclne
Guest
have you driven the car hard??? Driving it and keeping it under 2000 rpm, isnt going to show the extra horses.
What kind of drivers would install a plenum spacer?
- Thread starter puhahacj
- Start date
Haha, well.....the FX did get pushed to 4000K, felt some power around that range.
Motordyne's website shows largest gains around 5000k.....such a shame the fx rarely will see that range, but that's going to change now.
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Psiclne
Guest
Come on Open her up and feel what you paid good money for......take her all the way up and you will feel the gains, I guarantee it.
make sure to reset your ECU
Oooooh.....this could be it, drove the FX during lunch time, punched it and still didn't really feel that umph. Thanks Krayzie.
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Psiclne
Guest
Dont listen to Dave.....lol hes trying to up-sell you on something you obvisiously dont need by reading your original post. When did you install it and did you do a ECU reset? Has there been enough time for the ECU to learn the new changes??? Almost everyone thats installed the spacer felt the changes.
Haha, thanks Psiclne.
I installed this just 2 days ago on Saturday...no leaks, and the rubber oil seal didn't get caught. I tightened the bolts by hand with the bolt driver, fairly snug. So it's safe to say the ECU is still learning? Only put around 50 miles so far since the install.
- Car
- 05 FX35 RWD
FYI
testing was done with a stock Track Model 350Z.
REV limiter modification
A 7100 RPM (stock 6600 RPM) rev limit is set to take advantage of top end horsepower.
The stock rev limit was set way too low. Some of you may be having the problem of hitting the fuel cut at hard acceleration. We found this very annoying as we increased power at the higher rpm range. Hitting the rev limiter too often, could actually damage the engine since it is achieved by cutting fuel. By adding an extra 500 rpm, we can avoid hitting the rev limiter while protecting the motor.
Speed Limiter Removal
The speed limiter is removed. The stock limiter was set at 250Km/h (156 MPH), so for all practical purposes, we could have left it alone. But we decided to remove it, just in case someone feels the need to go beyond that.
Ignition Timing Map Adjusted
There wasn’t much room for improvement at the bottom end since the ECU retards a lot of timing by using a feed back system in stock trim. So, we have added more timing at the higher end to take additional advantage of higher-octane gasoline. This aids in improving torque from 3000 rpm and up.
Fuel Map Adjusted
Stock fuel was set to detune the top end horsepower. We discovered that the car runs extremely rich after 5000 rpm. Air to Fuel ratio (A/F) of 10.5 was found right before the stock rev limiter kicks in. Cleary, Nissan was trying to detune the power output at higher rpm to discourage the driver from hitting the rev limiter. For the performance enthusiasts, however, this is unsatisfactory, so we set the A/F to 12.5 all the way to redline to provide adequate power gain while still maintaining a safe margin.
Adding to above modifications, a few other adjustments were made to other maps to enhance the feedback function which improves power, torque and drivability. The resulting achievement is a remarkable improvement in driving feel, which is more than what numbers alone can tell you. We are very satisfied with the results and are proud to release our TECHNOS ECU for this tuning-challenged ECU, blowing the lid off what was thought to be an automobile already running pretty near its maximum capability.
testing was done with a stock Track Model 350Z.
REV limiter modification
A 7100 RPM (stock 6600 RPM) rev limit is set to take advantage of top end horsepower.
The stock rev limit was set way too low. Some of you may be having the problem of hitting the fuel cut at hard acceleration. We found this very annoying as we increased power at the higher rpm range. Hitting the rev limiter too often, could actually damage the engine since it is achieved by cutting fuel. By adding an extra 500 rpm, we can avoid hitting the rev limiter while protecting the motor.
Speed Limiter Removal
The speed limiter is removed. The stock limiter was set at 250Km/h (156 MPH), so for all practical purposes, we could have left it alone. But we decided to remove it, just in case someone feels the need to go beyond that.
Ignition Timing Map Adjusted
There wasn’t much room for improvement at the bottom end since the ECU retards a lot of timing by using a feed back system in stock trim. So, we have added more timing at the higher end to take additional advantage of higher-octane gasoline. This aids in improving torque from 3000 rpm and up.
Fuel Map Adjusted
Stock fuel was set to detune the top end horsepower. We discovered that the car runs extremely rich after 5000 rpm. Air to Fuel ratio (A/F) of 10.5 was found right before the stock rev limiter kicks in. Cleary, Nissan was trying to detune the power output at higher rpm to discourage the driver from hitting the rev limiter. For the performance enthusiasts, however, this is unsatisfactory, so we set the A/F to 12.5 all the way to redline to provide adequate power gain while still maintaining a safe margin.
Adding to above modifications, a few other adjustments were made to other maps to enhance the feedback function which improves power, torque and drivability. The resulting achievement is a remarkable improvement in driving feel, which is more than what numbers alone can tell you. We are very satisfied with the results and are proud to release our TECHNOS ECU for this tuning-challenged ECU, blowing the lid off what was thought to be an automobile already running pretty near its maximum capability.
- Car
- 05 FX35 RWD
Unless your filter is really dirty, . . the stock box is actually not bad. It's essentially a cold air bod by design w/ unecessary sound baffles
---------- Post added at 01:18 PM ---------- Previous post was at 01:17 PM ----------
You might be expecting too much from this bolt on
---------- Post added at 01:18 PM ---------- Previous post was at 01:17 PM ----------
You might be expecting too much from this bolt on
Filter is fairly clean...using one of those k&n types with around 10k miles on it, and just knocked most of the dirt out on Saturday while installing the spacer.
and yes......had way too high expectations for this
But 10 hp at the wheels should be a VERY big difference right?
On the old 97' Maxima, aftermarket Y-pipes had a strong "feel" to it, and those were only suppose to add on 5 or 6 hp at the wheels, so after seeing that 10 hp gain on Motordyne's website, I thought "oh man, this is gonna be GREAT".......
When I first installed the spacer, I immediately reset my ecu by doing the whole battery disconnect thing. My car drove super aggressive for about 2 weeks and it sort of settled down. When I say aggressive, the car felt like it was in race mode and it was very sensitive to throttle and I think it stayed in higher rpm ranges than usual. So whenever I stepped on the accelerator it, it got quite a bit of kick to it.
After the two weeks of aggressiveness, the car went back to its regular self. I can't really vouch that there was a noticeable gain after the plenum spacer. I'm sure there were some gains, but I did not feel much... or anything different. We are talking about small gains and it's really hard to feel minor gains unless you are a moving dyno and are very sensitive to the slightest changes. I'm sure i'll notice every bit when I have 100hp more to the wheels... That's my experience on plenum spacer.
After the two weeks of aggressiveness, the car went back to its regular self. I can't really vouch that there was a noticeable gain after the plenum spacer. I'm sure there were some gains, but I did not feel much... or anything different. We are talking about small gains and it's really hard to feel minor gains unless you are a moving dyno and are very sensitive to the slightest changes. I'm sure i'll notice every bit when I have 100hp more to the wheels... That's my experience on plenum spacer.
Thanks Mongolian. Sounds like we are on the same page with this, but still, $200 and 1 hour of labor is still worth it, right?
So would you recommend intake upgrade or just leave the stock setup as-is?