Truenotch's BEAMS AE86 racecar discussion

[nothingsfree]

Yeah the base map was surprisingly good. Have you tuned many cars with the G4 Mick?

[Mick Doohan]

about 15 ish

[Spencer]

All I can say is set your cam up so when you can afford a computer that can run VVti, you can use it

[eke_zetec_RWD]

i want some info on the pulses needed from the ecu to run the vvti....... might have a plan

[Spencer]

its just standard PWM isn't it, I don't know the specifics on exactly what duty values correspond to advance/retard but there are maps on the net somewhere

[Truenotch]

Yeah I think it's a pretty standard PWM - flange said he could write a chip to do the job, but there are other variables to think about as well.

Spence, I'll do all I can to get a cam that will do that job, but it's all about cheapness and speed of assembly at the moment. It needs to be finished by June.

[Spencer]

its pretty basic to make up a micro to control it The VVTi map would just use RPM, throttle position & load. Its just who can be fucked (ie has the time) writing the code and paying for the the dyno time to play with it

[eke_zetec_RWD]

i think ican make the cam advance with your ecu, need a boost controller that works on rpm and throttle postion. so a 3d boost controller. but not closed loop. thaughts?

[Truenotch]

That's an interesting idea Jase!

Roman also mentioned something about the chip wanting to have a readout from the cam angle sensor as well.

Could load be worked out from a MAP instead of AFM?

[eke_zetec_RWD]

its pretty basic to make up a micro to control it The VVTi map would just use RPM, throttle position & load. Its just who can be fucked (ie has the time) writing the code and paying for the the dyno time to play with it

oh u read my mind, reken a boostcontroller will work? i just lookd at my old pc link and its boostcontroll wont do it

[eke_zetec_RWD]

That's an interesting idea Jase!

Roman also mentioned something about the chip wanting to have a readout from the cam angle sensor as well.

Could load be worked out from a MAP instead of AFM?

yes load either map or tps. no afm.

[eke_zetec_RWD]

omg this is it!! for a hundy bux!!

http://jaycar.co.nz/productView.asp?ID= ... rm=KEYWORD

[Truenotch]

That would be a sweet way to do it... I think we might have to try it, yeah? I'll have a search around for info about the pulse frequency etc.

[eke_zetec_RWD]

be fast to tune on dyno, sucks having to stop engine, burn hands, adjust wheels, try again, and again, more burning ect

[Truenotch]

I'm keen provided the valves stay in one piece .

[eke_zetec_RWD]

depends how good you can solder circirt boards lol

[Simon]

Haha would not like to be the cause of munching a series of valves and pistons.

"Oh, yeah, that diode lead should have gone therere... oops"

[Truenotch]

, I'll keep my hands off it thanks. You boys can touch that mumbo-jumbo.

[nothingsfree]

Haha would not like to be the cause of munching a series of valves and pistons.

"Oh, yeah, that diode lead should have gone therere... oops"

^^ Beams piston with Ti valve embedded in it..

[Simon]

Shi-

Bet that made a sweet sound when hitting vtec.