When does the blip occur?

Throttle blips will occur downshifting either in Manual Mode Sport or even Normal mode. It's more evident in M-Mode and Sport as the engine revs are much more responsive. You have to definitely be in M-Mode and Sport and be decelerating at a rapid constant speed for the throttle blip to be strong. You can get it to blip when you're slowing down fast for a freeway offramp or just simply at a red light.

From any gear to any gear?

FBTP said:

Which bring me to another question (hijack my own topic). Is there a version of the manual in CD format that I can read from my laptop?

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I don't know of the manual being available on CD, but you can download sections of it on the owner's section of lexus.com. It's not convenient if you want to read it cover to cover, but if you have a question about a specific topic, you can do a search and download the relevant section(s) of the manual.

HTH,

Jeff
08 Smoky Granite Mica IS-F

The throttle blips are more obvious when you are downshifting to a gear that is causing the engine to go into a higher RPM range where the second stage of the air intake is open. Like when your flying into a corner hard on the brakes and you downshift a couple of clicks. So, if you want to "hear" it more you'll need to downshift at higher speeds more often. I'm not sure if just wanting to "hear" it is worth the extra rev ranges on the motor though.

FChampOH said:

The throttle blips are more obvious when you are downshifting to a gear that is causing the engine to go into a higher RPM range where the second stage of the air intake is open. Like when your flying into a corner hard on the brakes and you downshift a couple of clicks. So, if you want to "hear" it more you'll need to downshift at higher speeds more often. I'm not sure if just wanting to "hear" it is worth the extra rev ranges on the motor though.

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It is not so much the hearing of it, as I have heard it. Just trying to understand it better. Like, a few times, going into a corner, I try to drop a gear or two, and I guess the engine or speed is too high, and it just beeps. It is almost like I am expecting a slipper clutch to do some engine breaking for me, but that does not happen. Just the beep.

FBTP said:

It is not so much the hearing of it, as I have heard it. Just trying to understand it better. Like, a few times, going into a corner, I try to drop a gear or two, and I guess the engine or speed is too high, and it just beeps. It is almost like I am expecting a slipper clutch to do some engine breaking for me, but that does not happen. Just the beep.

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You are exactly right. The beep is to let you know that the engine is at too high of an RPM to downshift at that moment.

The blip actually reduces wheel spin in the rear, does it not?

the whole point of "blipping" is reduced wear and tear on the driveline. if this were a manual transmission it would be called heel-toe. it prepares the transmission for engaging a lower gear more smoothly. i know this might sound silly because the throttle controls the engine, not the transmission. so in a way it prepares the engine to match the transmission. whenever you are rollling, the gears in the gearbox are always spinning, heel-toe bumps up the rpm to match the rpm that the vehicle would then be in when lower gear is selected. saving precious syncros and the jolt/lurch forward you would get if u didnt heel-toe.

the auto-blip in the IS F, is this process, only automated, with no clutch pedal.

IS-F-I-DID said:

The blip actually reduces wheel spin in the rear, does it not?

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forgot to include this......

it reduced wheel hop at the drivewheels.

doublexl said:

forgot to include this......

it reduced wheel hop at the drivewheels.

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Thx,
By the same token, if we wait until redline to upshift, I suppose the jolt we feel is also doing damage to the drivetrain?

Yeah the abrupt feel of the trans in Manual and Sport mode is very common. It's normal operation of the transmission.

doublexl said:

u mean if u dont upshift and it hits the rev limiter? i wouldnt say that does damage to the driveline, or to the engine....it just cuts the fuel out.

not heel-toeing does not "damage" the driveline....it just wears the syncros faster. but in the IS F case, it blips when it feels that it needs too. ie) aggressive driving.

that being said.....constantly slamming into the fuel cut off isnt really a good thing.

if your talking about the jolt when it goes to next gear.....thats normal.......



did that answer it?

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Got it, thx! It just feels like letting her redline for just a brief sec gets me a bit more juice! Really bad for the engine long term?

If you do not do it all the time, I guess it's not that bad, they've built tolerances in these engines. The 6800 red line is where your max torque is, above that you're not getting more "power" anymore; therefore it's useless not to upshift.