300 rwhp is350?
10-26-11 | 10:41 AM
#17
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Driver
Joined: Aug 2011
Posts: 190
Likes: 0
From: GA
Just thought I'd bring this up, seemed like a good time to.
In the HKS F-ConIs I have the ablity to tune shift points. I can tune in the following points.
1) RPM base
2) Shift timing ----I mean the actual speed of the shift! Not just at what point it shifts
3) Timing Accel or Decay via shift
4) Rev limit setting
5) Speed Cut Def.......HKS SCD built in to the unit and yes it works for auto's in this program.
I have done most of my tuning just in this area. Most of the issues I found was Lexus pulls 7 degrees of timing between shifts. Thats equals @ 15HP of power loss before the shift.
All of the sluggish feeling when using the paddle shifters is due to the timing decay. Lexus issues the change point 300rpm before shift with a .100 shift speed.
I have changed this to 50 RPM and .010 shift speed. I raised the Rev limit to 7000rpm. I still shift at the same 6500rpm tho due to VVt-i tuning issues. ( Stock ECU just doesn't know what to do with the cams after @ 6800rpm.) CEL everytime I try to go higher REV's
Here is the funny part.
I'm pulling 12-18 degrees of timing for boost. Then the Stock ECU pulls another 7 degrees. So thats 25 degrees of timing. Ouch!
I removed the 7 degrees of stock timing decay on the shift point. The IS350 now shifts so swift and crisp it sounds like an Indy car shift. The "crack of a whip" sound. I no longer hit the rev limit in "D" mode.
Now! I know this is going to kill the clutches over time but I don't care
In the HKS F-ConIs I have the ablity to tune shift points. I can tune in the following points.
1) RPM base
2) Shift timing ----I mean the actual speed of the shift! Not just at what point it shifts
3) Timing Accel or Decay via shift
4) Rev limit setting
5) Speed Cut Def.......HKS SCD built in to the unit and yes it works for auto's in this program.
I have done most of my tuning just in this area. Most of the issues I found was Lexus pulls 7 degrees of timing between shifts. Thats equals @ 15HP of power loss before the shift.
All of the sluggish feeling when using the paddle shifters is due to the timing decay. Lexus issues the change point 300rpm before shift with a .100 shift speed.
I have changed this to 50 RPM and .010 shift speed. I raised the Rev limit to 7000rpm. I still shift at the same 6500rpm tho due to VVt-i tuning issues. ( Stock ECU just doesn't know what to do with the cams after @ 6800rpm.) CEL everytime I try to go higher REV's
Here is the funny part.
I'm pulling 12-18 degrees of timing for boost. Then the Stock ECU pulls another 7 degrees. So thats 25 degrees of timing. Ouch!
I removed the 7 degrees of stock timing decay on the shift point. The IS350 now shifts so swift and crisp it sounds like an Indy car shift. The "crack of a whip" sound. I no longer hit the rev limit in "D" mode.
Now! I know this is going to kill the clutches over time but I don't care
10-28-11 | 10:30 AM
#20
Thread Starter
Driver
Joined: Aug 2011
Posts: 190
Likes: 0
From: GA
That’s a good surprise, still in the planning stages for mine.
Currently thinking maybe PPE headers, JoeZ true dual with cats, and maybe 06is350’s sealed cold air intake…with maybe a couple more electronic mod’s for fun…
Still need F-sport sways…. But 4.5 - 4.8 0-60 and very high 12’s would make my day….
10-28-11 | 11:41 AM
#21
No more Cats, only Tanabe midpipe has 1 good size resonator.... and very quiet, unless at very high Rpm or WOT then u can really hear it ... here is the clip a few weeks ago at the drag trip ...
http://www.youtube.com/watch?v=KJ5gDJ4S5G4
http://www.youtube.com/watch?v=KJ5gDJ4S5G4
Last edited by ISF4life; 10-28-11 at 02:31 PM.
11-23-11 | 07:13 PM
#23
With the tune you should be able to hang with them no problem. Keep in mind HKS has his car FI'd so he (should be) playing with JB3's, m3's and IS-f's. I'm still waiting for him to post vids after he gets his belt slippage/boost leakage issues fixed up.
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