Duke

That is so true.

Duke

I have no idea what the first line means lol
It will be interesting to see how you find another type of spring setup. I just ordered a pair of 650 lbs front springs to see if it will create lots of understeer (as it should in theory) or if it is faster and better feel.

333pg333

You have to watch a US tv show called 'The Soup' to get the first line...although it has absolutely no relevance to anything we are discussing. lol

Be interested to see how you go with the stiffer springs. Let us know?

Back to the topic. What do people know about E Throttles and how could you fit one to our cars?

V2Rocket

see if you can find the setup off a corvette Z06 or bmw...bmw is very complicated though due to the VANOS. basically a sensor for pedal travel that opens the TB a corresponding amount

good amount of room behind the gas pedal for such a thing, you could maybe take out the throttle stopper bolt and put a plunger on there, some type of potentiometer.

Phil R

chris 1000 front / 600 rear seems like a pretty strange spring choice. what else is being done to set up a car with those spring rates?

gt37vgt

I still think throttle activation and boost control and some rear end mods along with your turbo change and ignition remap will get you the speed your looking for ..

OK e Throttle the throttle body can be had from a current falcon / commadore several older bmw s first 750 ... but the controller is what the challenging part ..I genrally have a cheaper way to do most things but i don't know how to run an e throttle with anything less than a $4000 Ecu
I notice the link G4 has boost per gear and boost per TPS this is the answer....
the easist way to modify your power output to suit the TPS input and there for driver's wishes is boost /tps when you are trying to roll on the throttle you are always getting far more than you ask for

333pg333

Ideally we don't want to drop a cylinder type t/c. Too much imbalance can occur in the motor and driveline we're thinking. A 'soft' option would be what we want.
I didn't really want to pre select a boost per gear option as this may deprive you of power when you weren't going to slip anyway...if that's what you're getting at? Still, I guess this could be tuned so that you hone this part of the map and get pretty close anyway?

thingo

They usually use a mixture of ignition cut/retard/fuel, dbw has advantages but it is not required for effective race traction control,and as adam says options for controlling e throttles is limited.

333pg333

I was hoping you might join this thread Rod. So what are you going to use on the 968 project?

thingo

LS2 dbw throttle body with Motec, I have heard that dbw are a bit of a pain to set up, but Motec is familiar with the ls2, and it gives a lot of options once it is calibrated.

333pg333

What happens if dbw fails and motor goes to WOT? In a cable operated situation you go back to idle if something breaks. Seems like there are more ways for a dbw to fail.
I'm not judging, just trying to get relevant info.

V2Rocket

why not electronically open the bov when too much slip is detected? less boost with power is better than full boost with no traction.

gt37vgt

they work simlar to an injector the more duty cycle you feed them the more they open they are "fail safe" so yes they shut in a failure .
if you map boost per TPS there is NO POWER PENALTY.JUST more control with your foot .
100% throttle 100% boost

V2Rocket

could just avoid the guesswork and put huge slicks on the back and a stonkin LSD.

Duke

Patrick, I'm hoping you get the results you want from the setup you are discussing.
Personally I don't believe in that solution. First of all, throttle angle is not directly related to power in a turbocharged car so using throttle to balance the power to get optimum slip is something I don't think will work. I would do as gt37vgt suggests and map boost against TPS. I'm pretty sure you will modulate the throttle much better than the computer.
IMHO traction control with throttle angle will only work well to stop the car from spinning - not to get the car fast around a track.
I think you would get best results from boost vs TPS and a "regular" traction control with cutting cylinders, like a soft rpm limiter.

Have your tuner run this kind of traction control on any other race vehicle? I've never heard of it. It seems you're trying to re-invent the wheel which sometimes can work well, but usually not without lot's of time and trial an error.