Help!!! ISF is redlining @7200rpm!?!?
10-08-15, 07:28 AM
#226
Instructor
I can't express this enough, go to the drag strip!!!!! All you will need is a helmet. Just take a look at this thread
https://www.clublexus.com/forums/is-...ce-thread.html
this is the only way to actually tell if the ecu is making any difference. I for one would love to see what happens.
https://www.clublexus.com/forums/is-...ce-thread.html
this is the only way to actually tell if the ecu is making any difference. I for one would love to see what happens.
10-08-15, 07:34 AM
#227
I can't express this enough, go to the drag strip!!!!! All you will need is a helmet. Just take a look at this thread
https://www.clublexus.com/forums/is-...ce-thread.html
this is the only way to actually tell if the ecu is making any difference. I for one would love to see what happens.
https://www.clublexus.com/forums/is-...ce-thread.html
this is the only way to actually tell if the ecu is making any difference. I for one would love to see what happens.
And who knows, if it's flatter than this , I might have better results.
10-08-15, 09:04 AM
#228
Tech Info Resource
iTrader: (2)
Toyota ECUs even on factory n/a cars WILL see afrs drop to close to 10:1 at WOT... Certainly under 11:1. I've dynoed enough to know this.
Also, I've run the same car on the same dyno (an SC400) with the factory ECU and then with an aftermarket one and picked up over 15% increase in power. That is with NO hardware/mechanical changes at all, just far better ignition and afr maps. So the gains are there, especially on very conservative Toyota maps.
I can also vouch for rpm increases being of little performance value in an otherwise standard engine, with the SC400 the engine could Rev to 7000 all day long (and sound fantastic doing it!) but on the track it was actually marginally slower because the stock cams were all out of puff by 6000 or so...
I personally will hold my judgement on these IS F ECUs until better back-to-back testing can be done, I do not think it is in the interests of any company to deliberately sell expensive products that don't work, especially when they have gone to the lengths of development that Novell appear to have. Word will quickly spread as it has here when products don't work, sure you might get a few unwise buyers but ultimately you won't make money in a reasonably savvy, small market like this.
Let's just see what happens.....
Also, I've run the same car on the same dyno (an SC400) with the factory ECU and then with an aftermarket one and picked up over 15% increase in power. That is with NO hardware/mechanical changes at all, just far better ignition and afr maps. So the gains are there, especially on very conservative Toyota maps.
I can also vouch for rpm increases being of little performance value in an otherwise standard engine, with the SC400 the engine could Rev to 7000 all day long (and sound fantastic doing it!) but on the track it was actually marginally slower because the stock cams were all out of puff by 6000 or so...
I personally will hold my judgement on these IS F ECUs until better back-to-back testing can be done, I do not think it is in the interests of any company to deliberately sell expensive products that don't work, especially when they have gone to the lengths of development that Novell appear to have. Word will quickly spread as it has here when products don't work, sure you might get a few unwise buyers but ultimately you won't make money in a reasonably savvy, small market like this.
Let's just see what happens.....
Having spent a lot of time looking down ports on Japanese engines, especially Yamaha four and five valve per cylinder designs, I'd bet it would be possible to move the powerband up a few hundred rpm even with the existing heads, but it won't be easy or cheap if you are paying someone to do it. FWIW, I normally charge $3k for a 2JZ-GTE head and $3.5k for a 2JZ-GE head (and one of my GE heads runs on an 8 second car), so having someone talented rework these heads will be serious money.
If I had one of these ECMs, the first thing I would try is RC F cams. It might make enough of a difference to choose not to do the full on port work necessary to really gain high rpm torque.
10-08-15, 07:44 PM
#230
Is it me or maybe just the fact that it's shifting at 400 rpm higher is gonna get the car at higher rpm in the next gear and be more in the powerband each gear afterwards. Maybe the improvement is just there and that's why he feel the car is faster, and it should be even if he has no (peak) power improvement.
10-08-15, 07:56 PM
#231
Is it me or maybe just the fact that it's shifting at 400 rpm higher is gonna get the car at higher rpm in the next gear and be more in the powerband each gear afterwards. Maybe the improvement is just there and that's why he feel the car is faster, and it should be even if he has no (peak) power improvement.
F=ma
W=FD
P=W/T
P=FD/T
V=D/T
So...
P is really equal to FV
Same force delivered at a higher speed= more power
10-09-15, 05:45 AM
#232
Still that would be more than a 10% variance in WHP, I've heard of as high as 3% differential between the two , so I don't think dyno differences are the culprit.
I found out that DC is using the velocity formula for hp calc and accelerometer data for torque. You can get HUGE Torque spikes in the data (I just junk those results when i see them ) but the hp, because it is based off of gps vehicle velocity data is MUCH more stable. Because it delivers instantaneous hp it must be using delta-V for calcs because you can get derived vehicle performance (hp) at any time, not just at the end of a 1/4 mile run like you would if you were using the trap speed vehicle weight formula to calc horsepower.
Last edited by IredSF; 10-09-15 at 05:52 AM.
10-09-15, 08:04 AM
#234
Pole Position
What is the app you are using? Is it free? I'm curious now what the app would report on my car.......
10-09-15, 08:13 AM
#235
10-09-15, 08:51 AM
#236
Pole Position
Thx appreciate it
10-09-15, 09:02 AM
#237
And about the over revv (redline being higher) does anybody think it could be risky on a dd? I did that on my previous bimmer no problem but the engine could be found at 800$, I would imagine a titanium valve dropping in the motor to cost a little more than that, like a left arm or something
10-09-15, 09:43 AM
#238
And about the over revv (redline being higher) does anybody think it could be risky on a dd? I did that on my previous bimmer no problem but the engine could be found at 800$, I would imagine a titanium valve dropping in the motor to cost a little more than that, like a left arm or something
10-09-15, 12:00 PM
#240
Mine is wi-fi (iPhone) works great
From Amazon
If you are looking for one.
http://www.amazon.com/gp/aw/d/B00PFF...gol+obdii+wifi