Converting Silvertop to MAP/ DLI Ignition for 20v

[[2LOOSE]]

If either of these topics have been covered on here I couldn't find them, just thought I'd get that out of the way.

Bascially going to be turboing a 20v to go into a KE70 and wish to get rid of the AFM on the silvertop and also hope tofind a war to run a DLI iginition setup so I can ditch the dizzy and leave the firewall in tact.

If anyone has ideas on either of these I'd be very keen to hear them

Peace

[AceSniper]

well since ur going turbo u need a new ecu... most aftermarket ecu's let you run map and DLI so all you will be needing is the hardware... igniter coils map senser

[nite b]

I used mitsi quad coils & ignitor, no AFM, just trumpets when I put silvertop 20v into my old AE86. Left the dizzy in there, so could use pickups to run Link computer. Just milled up an alloy cap about 30mm deep to replace original leads cap & fitted in car fine. Cleared firewall sweet as.

[gdsup]

i used a 4agze ecu on my supercharged 20v motor which uses .DLI, if i could afford it aftermarket ecu is best, but in my case mark from www.trickytune.co.nz was able to use a piggy back gizzmo CamFc to control the fueling and vvti which works great

[[2LOOSE]]

Kool, thanks for the help guys, what sort of misti engine did you get your coils off dude

[nite b]

4G61 & 4G63 DOHCs & also turbo versions (cyborg/vr4) bolted to inlet manifold.

[[2LOOSE]]

do they run twin coils, or coil per plug

[nite b]

Twin I guess you would say. Same as ZE.

[[2LOOSE]]

is there a factory map sensor ican use or will i need an aftermarket one of some sort?

[nite b]

If you use Link, they have one built in.

[jormos90]

Hey I am nearly finished putting 4AG-20V silver into my KE70.

Its my daily driver just wanted something with more legs and economy than the old 4K. Since I prolly won’t be moding the engine, didn’t really want to go aftermarket ECU, and I figure standard ECU will prolly give me better economy.

Didn’t really want to cut a hole in the firewall, and I hate air flow meters! So begins modify the standard ECU project!

I am just using the standard dizzy will the cap and rotor removed, so it is just acting as a crank angle sensor and a MAP sensor off a 3S.

I have reverse engineered most of the circuits that I require in the ECU, I am using a small PIC microprocessor that takes the NE/G1/G2/IGT signals and creates two signals I call IGTa IGTb, Toyota normally just have one IGT line and a enable line to select which coil to fire but I didn’t want to have to find a 4AGZE igniter so decided to create two separate IGT signals so I can use normal igniters.

Project is going alright just trying to source another 20v igniter at the mo, but I think I might try using 3S igniters as they are easier to find.

Second stage of the project will be to create a lookup table to convert AFM into MAP, did a bit of research think this shouldn’t be to hard.

Will keep you updated on my progress...

[spencer]

Second stage of the project will be to create a lookup table to convert AFM into MAP, did a bit of research think this shouldn’t be to hard.

I looked at this when I was playing with micros at uni, wasnt worth the effort aye just buy a megasquirt

[jormos90]

Its simple stuff... hopefully have it running this weekend...

I dont want an aftermarket ECU

[soopachargen]

god you sound on to it dude

[sergei]

Second stage of the project will be to create a lookup table to convert AFM into MAP, did a bit of research think this shouldn’t be to hard.

I looked at this when I was playing with micros at uni, wasnt worth the effort aye just buy a megasquirt

Cheap micros will not handle it, however micro setup that will handle it, will be near cost of megasquirt, and time you will spend coding debugging will not be worth the hassle, unless you love the stuff.

[spencer]

na a whole decent development board goes for around megasquirt price which has way more power, your paying for their code and a specific board with the right signal conditioning circuits

[jormos90]

Finshed 80% of code, all hardware is done I am now intercept the signals after standard ECU's conditioning circuits so I dont require much analog electronics at all...

I have serial debug outputing AFM,MAP,RPM so I can use this data dump to create a lookup table.

I have a test setup on the bench spinning the dizzy and igniters seem to be firing waste spark coils correctly...

Just have to finish off a couple of mechanical things and de-looming the bay this weekend.

Then the real test next weekend, will it fire correctly at 7500rpm....

[jormos90]

Its alive, fired it up last night, my DLI conversion seems to be working...

Just need to finish off wiring inside and take it for a drive / dyno run to log data of RPM vs MAP vs AFM position so i can build a lookup table and then remove the damn AFM and simulate with MAP....

Hopefully RPM,MAP will be enough to model AFM output...

[neo]

sounds good.. keep my posted

[AceSniper]

isnt this along the same lines of how the "MAPecu" works?
http://www.mapecu.com/