Turning off the Nannies question

[Bretts]

I raced first time yesterday it was on stock street tires nannies equaled 13.7s launch equalled some spin wheel hop and 13.2s on the quarter mile both off equalled crazy spin and backing off , driver errors lol . I just ordered spohn trailing arms toe rods and prothane kit to deal with the hop then launch control again!

[Red2014SS]

Originally Posted by Comrando

But the 4 barrels have spring loaded secondaries that opened when the air flow was great enough. Otherwise they would just bog the motor. It was quite a bit of work to tune those suckers. And you had to change them every time you drove if you wanted the ultimate power. PITA. Wouldn't even start if it was too cold or too hot for your settings.

The electronic control is much more precise than a spring and can react to air temp, humidity, etc.
"I'm givin' her all she's got Captain"

None of that has anything to do with the method used to open the throttle blades. In theory, a person could install a cable on a modern EFI system. It would still start in cold weather, it would still compensate for air density, etc. It just wouldn't have any built-in electronic delay when you floor it. And that's what Choco is talking about.

[DCZ1LE]

Midknight:

Reading through the Owner's Manual I can find no reference to tighter steering with the nannies off.

Where did you find this?

[blakjak55]

Originally Posted by ChocoTaco369

Right...but it's at heart a clutch control mechanism. The reason why it isn't available on the L99 is because its programming is related to the clutch. No clutch, no need.

While I don't know for sure, I can't imagine how that it controls the clutch at all. That's purely an input to the pedal from the driver. There's no other way to control clutch engagement?

My guess is traction control (as being discussed here) is a function of timing or fuel as the ECU has control over those.

[gajagfan]

Originally Posted by blakjak55

While I don't know for sure, I can't imagine how that it controls the clutch at all. That's purely an input to the pedal from the driver. There's no other way to control clutch engagement?

My guess is traction control (as being discussed here) is a function of timing or fuel as the ECU has control over those.

I agree it does not control the clutch at all. It controls throttle (and possibly rear brake), but not clutch. Once you have let it out, it is out and fully engaged.

[White14SS]

Originally Posted by ChocoTaco369

Correct me if I'm wrong, but the launch control attempts to control the clutch slippage. Since an automatic has no clutch, it doesn't need launch control. At that point, both cars have traction control and stabilitrak, making it equivalent.

At least that's how I understand it.

The 4th gens had a cable-driven throttle body. Cable drive RULES. Electronic throttle bodies retard the response on purpose to keep the power "in check." That's probably why you felt like the power was instantaneous in the '99. It WAS. It had nothing stopping it except the traction control system, which like you said, was OFF. In the 5th Gen, you'll never get that because the connection isn't mechanical. I HATE these electronic TB's. I think a mechanically driven throttle body would change all your complaints. But as a result, the car would be "harder" to drive.

This is probably a dumb question but is their anyway to get this to work on a 5th gen it says that it fits the stock ls3 manifold, but is their anyway to get it to work?

https://www.holley.com/products/ls_p.../parts/112-589

[CamaroCracka]

There are other sites where guys posted threads about converting from DBW to DBC and some going the other direction as well. Juice not worth the squeeze IMO for GenV.

[White14SS]

Originally Posted by CamaroCracka

There are other sites where guys posted threads about converting from DBW to DBC and some going the other direction as well. Juice not worth the squeeze IMO for GenV.

On a scale of 1 to 10 how much of a project would it be?

[CamaroCracka]

Originally Posted by White14SS

On a scale of 1 to 10 how much of a project would it be?

Based on what I read, a 9. The TPS is used for a lot of things in the ECU. I'm not sure the E38 ECU even supports it. IIRC, most of the stuff I saw was guys taking later LS1B ECUs and converting 5.3/6.0 rigs to DBC for off road, but given enough time and money anything is possible.

If you want your throttle to open immediately, get a VTC. I've never owned one, but seems like a way better solution. A Bo White or VMax porting of your TB is also a good alternative.

None of this even applies to racing since you're wound up to 4k at the line. At 4k, I assure you the throttle is open.

[White14SS]

Originally Posted by CamaroCracka

Based on what I read, a 9. The TPS is used for a lot of things in the ECU. I'm not sure the E38 ECU even supports it. IIRC, most of the stuff I saw was guys taking later LS1B ECUs and converting 5.3/6.0 rigs to DBC for off road, but given enough time and money anything is possible.

If you want your throttle to open immediately, get a VTC. I've never owned one, but seems like a way better solution. A Bo White or VMax porting of your TB is also a good alternative.

None of this even applies to racing since you're wound up to 4k at the line. At 4k, I assure you the throttle is open.

Yeah, I was planning on getting mine ported but the vtc just seems kind of gimmicky to me maybe it really does work.

[JR 1]

Originally Posted by White14SS

Yeah, I was planning on getting mine ported but the vtc just seems kind of gimmicky to me maybe it really does work.

I haven't tried a VTC either, but the lag if definitely something programmed in not inherent to drive by wire. They dumb down the response intentionally to protect the car. You could also get rid of the lag by getting a tune which would be a lot cheaper and easier than switching to a DBC set up which would require a ton of work to make the ECM happy.

[CamaroCracka]

Originally Posted by White14SS

Yeah, I was planning on getting mine ported but the vtc just seems kind of gimmicky to me maybe it really does work.

It certainly does not make the car faster because, as I said earlier, the TB is open when your at the line, i.e. no need for it.

I tried to get the delay tuned out, but my tuner said there are safety parameters set by GM he cannot get around. I'm guessing that means he can't set below a certain limit. Perhaps if someone has a custom OS for the E38, they can.

I had an annoying dead spot from a start. I would let the clutch out and give a little gas and it frequently it wanted to die unless I gave it more gas, which put me up the ass of the Prius in front of my who was waiting for a sign from God to get moving. I had Bo White port my TB and it is essentially gone, so for me it was definitely worth the $150. I sent it to him while I was doing the cradle bushings and other stuff and he had it back before I was done. However, I don't think he is taking any more work right now for personal reasons, so that leaves you with the VMax or a used Bo White unit someone is selling.

FWIW, DBC is not all it's cracked up to be either. Ever seen a stock 78mm TB with a hole in the blade from the factory to keep it from surging. If you have a mud buggy and want as few electronics as possible, its a good option. For a modern street driven car, not so much.

[Chevy_cowboy]

The biggest place I really notice the VTC is blipping the throttle on a downshift. Now on SP6 or 7 its a true blip, before it was more of a press and wait a second. Less lag when taking off from a stop also, planning a 3.91 gear swap soon that will make that even more fun.

[White14SS]

Originally Posted by CamaroCracka

It certainly does not make the car faster because, as I said earlier, the TB is open when your at the line, i.e. no need for it.

I tried to get the delay tuned out, but my tuner said there are safety parameters set by GM he cannot get around. I'm guessing that means he can't set below a certain limit. Perhaps if someone has a custom OS for the E38, they can.

I had an annoying dead spot from a start. I would let the clutch out and give a little gas and it frequently it wanted to die unless I gave it more gas, which put me up the ass of the Prius in front of my who was waiting for a sign from God to get moving. I had Bo White port my TB and it is essentially gone, so for me it was definitely worth the $150. I sent it to him while I was doing the cradle bushings and other stuff and he had it back before I was done. However, I don't think he is taking any more work right now for personal reasons, so that leaves you with the VMax or a used Bo White unit someone is selling.

FWIW, DBC is not all it's cracked up to be either. Ever seen a stock 78mm TB with a hole in the blade from the factory to keep it from surging. If you have a mud buggy and want as few electronics as possible, its a good option. For a modern street driven car, not so much.

Yeah I think my plan is to get my tb and intake ported, then do the heads and cam. I don't know if I should get my stock heads ported or if it would be better to just get a good set of aftermarket heads when I do the cam.