speedworks

this evening i was tinkering around with building the plug-in and button for the profec b low/high boost switch when i had a brainstorm. i decided to mounted a nos (naaawwwsss ) microswitch on an aluminum bracket and position it in such a way that when you shifted the car into second gear it pushed the microswitch button and engaged the high boost mode. the only downfall is after doing a burnout in the bleachbox i will have to remember to switch the controller back to low boost mode before launching. maybe this will help control some of my wheel spin in first gear. i'll post back after the virginia race and let everyone know if it helps out.

Pengo

hmm that's pretty creative. the nos switch is momentary right? cuz that's all u need to switch modes. good luck, i'd love to see pics of the setup

speedworks

the nos switch makes constant contact when depressed, the profec switches when you hold its button in but does not seem to hurt it if you keep holding it in constantly. i mounted the switch on the shifter inside (h series). i'm sure it could be done to a b series.

Civic TSI

Nice, if you could post some pics, it would be even nicer.

speedworks

sorry,i dont own a digital camera

Foozball26

sounds like a good idea, something to add though, mount ANOTHER switch (toggle switch) somewhere so that the switch you have mounted in 2nd gear won't activate unless you flip the other switch.

That way you don't have to worry about switching it back to low boost before a run, or if its a daily driver, switching from low to high everytime you hit 2nd.

just a suggestion.

int3gra

great idea speedworks, good thinking foozball

Pengo

or u can wire two switches in parallel, one in second and one in first, so that if ur at the track, the next time u put it into first, it'll switch back to low and be ready for high in second. i know, it gets complicated, esp for a daily driver, but the combinations are endless

now if i could find a simple way to tap into the power button i could make it three stage: power off runs off wastegate, power on to low boost, switch to hi boost

speedworks

thats not a bad idea either. if i get where it starts spinning in second i'll make a new bracket and have it switch when going into third.

Foozball26

well you will most likely spin in 2nd if you're on street tires, slicks is a different story.

danl

I did that. I found it easier to just modulate the throttle in all the traction limited gears. REason being is that the car will hook at times with low boost, and others it won't. Its better to react dynamically as a driver.

speedworks

try to modulate a 10 second car. its not so easy

danl

Try to modulate a car that goes from 90 foot lbs of torque to over 300 foot pounds of torque within 500rpm's on street tires and let me know how it goes. I go from full throttle back to 3/10 throttle in first gear. I then go to wot in second, and when the I know the turbo is going to spool, back it off to a little over half throttle. I then plant it for teh rest of the gears. I never said it was easy, but it has worked better for me. My 2L motor absoutley annihilates a 16g turbo when it comes to spool, and makes teh car respond like a lightswitch with respect to power delivery. My friends crx with simillar power/weight ratio is much easier to manage with a bigger slower spooling turbo on a smaller displacement engine. I've worked hard to get 2.1 short times on my winter tires (stock saggy 13 year old springs/shocks too) and thats my 2 cents

speedworks

and by the time you played with gas pedal that much you have already lost the race. i'm not talking street tires here, i'm talking slicks.

danl

Lots of world class race drivers modulate the throttle, rally driving comes to mind. Its not about making a reaction to the change in traction, rather a 6th sence on what your car is capable of. My experience is that controlling boost to control torque to the wheels is a poor way to impliment traction control, that was your origional question. Controlling ignition timing to limit power may be a much more capable way of controlling things. At 10 psi, sometimes my car would hook great, others i'd be spinning madly at the same exact boost level.

Pengo

well for me it's not even as much the launch, but the shift. my car isn't a 10 second drag car by any means, but i kno for a fact that i get less tirespin during the 1 to 2 shift at 7 psi as opposed to the 10 psi i plan to run after i hit 2nd. modulating the throttle doesnt help me in this case. if i ease off the gas for less boost my rpms would take way too long to build up and if i shift early i know my car will fall below vtec shutoff. it's much easier to just take it to redline in first at low boost to ensure minimum wheelspin and then switch to hi boost after im in second.