New Product RR-Racing ISF ECU Tune.... FINALLY!!!
02-04-16, 01:58 PM
#646
Lexus Champion
iTrader: (20)
Bolt-on intake and exhaust mods WILL NOT increase the motor's ability to breath further into the rpm range. Neither will a tune. These mods, assuming they work as advertised, will only elevate the power band, not lengthen it.
The ONLY way to increase the point at which peak power is achieved is to dig into the heads, revise the cam lift/duration, change intake runner design, etc.
I would heed the warning about raising the limiter. These motor's aren't making power above ~6,000-6,200rpms thus you should be shifting at that point or slightly beyond and definitely not at the 6,800rpm fuel cut. It's just wasted time and it will hurt 1/4 mile ET/MPH. Sure, by the seat of the pants it feels like the motor is still pulling above 6,000rpms, but the reality is power is slowly bleeding off. Less power = less acceleration. Simple as that.
If you must increase the limiter, say for road racing where revving it out longer is more beneficial/safer than shifting, then I wouldn't raise it more that 200rpms.
With that said, I can't believe no one as yet to do a simple gear by gear ideal shift point calculation for 1/4 mile performance. I think many of you would be surprised by what the ideal shift points really are. By just eyeballing it, I'm seeing the following:
1-2: 6600rpms
2-3: 6400rpms
3-4: 6300rpms
4-5: 6200rpms
The ONLY way to increase the point at which peak power is achieved is to dig into the heads, revise the cam lift/duration, change intake runner design, etc.
I would heed the warning about raising the limiter. These motor's aren't making power above ~6,000-6,200rpms thus you should be shifting at that point or slightly beyond and definitely not at the 6,800rpm fuel cut. It's just wasted time and it will hurt 1/4 mile ET/MPH. Sure, by the seat of the pants it feels like the motor is still pulling above 6,000rpms, but the reality is power is slowly bleeding off. Less power = less acceleration. Simple as that.
If you must increase the limiter, say for road racing where revving it out longer is more beneficial/safer than shifting, then I wouldn't raise it more that 200rpms.
With that said, I can't believe no one as yet to do a simple gear by gear ideal shift point calculation for 1/4 mile performance. I think many of you would be surprised by what the ideal shift points really are. By just eyeballing it, I'm seeing the following:
1-2: 6600rpms
2-3: 6400rpms
3-4: 6300rpms
4-5: 6200rpms
lol, try shifting at those RPMS at the track and let me know if those times will match redline times.
02-04-16, 02:13 PM
#648
Bolt-on intake and exhaust mods WILL NOT increase the motor's ability to breath further into the rpm range. Neither will a tune. These mods, assuming they work as advertised, will only elevate the power band, not lengthen it. The ONLY way to increase the point at which peak power is achieved is to dig into the heads, revise the cam lift/duration, change intake runner design, etc. I would heed the warning about raising the limiter. These motor's aren't making power above ~6,000-6,200rpms thus you should be shifting at that point or slightly beyond and definitely not at the 6,800rpm fuel cut. It's just wasted time and it will hurt 1/4 mile ET/MPH. Sure, by the seat of the pants it feels like the motor is still pulling above 6,000rpms, but the reality is power is slowly bleeding off. Less power = less acceleration. Simple as that. If you must increase the limiter, say for road racing where revving it out longer is more beneficial/safer than shifting, then I wouldn't raise it more that 200rpms. With that said, I can't believe no one as yet to do a simple gear by gear ideal shift point calculation for 1/4 mile performance. I think many of you would be surprised by what the ideal shift points really are. By just eyeballing it, I'm seeing the following: 1-2: 6600rpms 2-3: 6400rpms 3-4: 6300rpms 4-5: 6200rpms
02-04-16, 05:53 PM
#657
Pole Position
^^^Very nice!! We want a longer video with some more high speed pulls in Mexico!
02-04-16, 07:54 PM
#659
Quick 20-100 pull. Road has a "slight" uphill incline but it gives you an idea of how it sounds like. Mods: Drop in filter, exhaust and RR Racing Tune. 1st gear rips so fast I didn't have time to grab the shift paddle fast enough. 
Video Link: https://youtu.be/2de7OES3jWM
Video Link: https://youtu.be/2de7OES3jWM