ST165 to ST185 ECU Conversion

by **DangerViking** » Tue May 02, 2006 4:34 pm

Alright, almost done with a diagram for 165 <--> 185 harness conversion, and I'll be doing a writeup when it's all over, hopefully

On the 185, the circuit opening relay for the fuel pump is controlled by the FC line on the ECU, but looking on the 165 wiring diagram, the same plug on the circuit opening relay connected to the fuel pump is run by the AFM... therefore, if you use a 165 AFM, you don't need to connect the FC pin to anything? Just wanted to make sure, that's the only thing I really had any question left on.

Here's what I've got so far (the FC pin is circled so that I'll remember to look into it):

http://www.dangerviking.com/alltrac/ECUpinouts.JPG

P.S. this whole thread should probably be a sticky, since so many people are doing first to second gen swaps, and there's been some really good info on here

by **Qlynxer** » Fri May 05, 2006 8:49 pm

Finished up my harness yesterday and everything seems to be working fine. Car idles smoother and seems to have better throttle response. Much thanks to All4traction for sharing this wonderful idea. I would highly reccomend that all 185 swappers look into this. I've never done anything electronic related but was able to get everthing put together in just a day.

Quan Ly

BTW On the 165 ecu, what does ELS and ACT got to?

by **AlltracAvenger** » Mon May 08, 2006 6:40 am

This is really interesting stuff. While I'm not yet going to go for the '185 setup, this would make the engine swap a pretty much complete bolt-on when I do get around to that. This needs to be stickied or FAQed, and if I need to, I'll be scavenging a few ECUs as well. This is far far better than having to hack into your wiring!

by **klue** » Fri Aug 25, 2006 4:10 pm

what tool do u use to push the pins out, i must be retarded cuz i cant get them out.

by **alltrac.net** » Sat Aug 26, 2006 4:49 am

sticky worthy

I had done all the wiring (in theory) on paper in a notebook for this conversion, and lost the paperwork.

It's good to see that someone actually got it done.

This opens the doors for st205 ecu on st165. Since it is so close between st185/st165.

by **datajon** » Mon Sep 11, 2006 8:39 am

HI.

female receptacle is amp/tyco part # 174518-7

the male plugs are part #'s 174514-6 (16 pin), 174515-6 (22 pin), and 174516-6 (26 pin), with contacts being part #'s 173631 (large) and 173716 (small). you'll need 16 of the larger and 48 of the smaller ones.

does any one know the parts numbers for the 205 ecu pcb sockets and plugs as well as th e185 ecu socket and plugs..

i have been looking though

http://www.onlinecomponents.com/ stocks all these parts.

but no pictures , or spec of connectors, with plugs. Thus making it very hard to know what parts to order.

wanting to make more conversion leads, for mega squirt, motec, pectel ecu upgrades, but don,t wish to continue hacking good working ecu and looms apart for the critical parts……..seem’s such a waste..

many many thanks for any info..

by **datajon** » Sun Dec 10, 2006 11:08 pm

Hi its been a long time.

Hi.

At long last got the 185rat on the rollers, having used dl1 & accelerometers for gauging power output, when road mapping..

Having recently changed the turbo, due to oil seal failing on the exhaust side, thus filling the exhaust system with oil, 3rd turbo this year.

hopefully the hybrid ct turbo should last for a few months.

ecu megasquirt msextra 029t code, with custom electronics.

Operating boost window 1.6 bar max

Dyno run boost max 1.34 bar

slight misfire 5550 & 6050 , having problems with position sensor, used denso, now using missing tooth setup, similar problems , moving onto optical sensor & wasted spark.

charge temps /power

run (1) 1.32 bar MaT 31.7C 272.06 bhp 323.48 ft/lbs wheels
run (2) 1.34 bar MaT 39.4C 282.24 bhp 302.72 ft/lbs wheels

Engine health poor, smoker…been running 1 to 1.6 bar for almost a year…not bad for stock internals….lol

dyno plot as you can see the missing ignition signal...

ms log of event

injector duty 101 % on 550 running higher fuel pressure, improved fuelling system, with mods….no 5th injector this time, a close call.

not bad 1st run using mega squirt.

Think some larger injectors , wind the boost up a notch 1.6bar hopefully see over 400 bhp on flywheel…

Using ms-extra running on the megasquirt is best buck for bang return..

by **Gary ST165** » Fri Dec 22, 2006 4:46 pm

oops double post

by **Gary ST165** » Fri Dec 22, 2006 4:47 pm

awesome results datajon.

323.48 ft lbs at the wheels is very impressive on a 50mm CT hybrid @ 1.34 bar and 550 cc injectors.

the megasquirt has delivered at long last. congratulations.

not bad for stock pistons

by **Gary ST165** » Fri Dec 22, 2006 5:58 pm

triple post blunder :smokes:

by **toytech** » Mon Feb 05, 2007 6:18 pm

great info, just ordered my connectors and wire terminals.
If they are correct< I will pass the info on to mr controls so they can make plug and play harnesses for the standalone without killing an ecu for the connector.

by **All4Traction** » Sun Apr 22, 2007 2:46 pm

Well, I will have my harness and ecu up for sale in a short while, check out the for sale watch section and shoot me some offers.

by **Toxygene** » Mon Apr 23, 2007 10:28 pm

What's the largest horsepower number you can safely run on stock internals?

Is it unusual to be in the 300-350 range on stock internals?

by **xCH121Sx** » Tue Jun 19, 2007 8:30 am

Since theres a minimum order of 30bux at Onlinecomponents.com...

anyone wanna buy all the components needed for 15bux Shipped in the US.

i was just gonna buy double to get closer to the 30 minimum buy.

when i receive the stuff ill let you know and ill ship it when i receive the money... sound like a plan?

by **GT4gone** » Mon Jul 30, 2007 4:27 am

Anyone familiar with the above website, and part #'s??? I'm looking for the male/female/connector pins for a conversion from ST165 harness to the ST205 ECU?? Someone.. :shrug:

HELP?

1) female 165 part # (3pcs, i believe)...
2) male 205 part # (4pcs, i think)...
3) (#pcs?) large connector pins
4) (#pcs?) of small connectors

BACKGROUND: i have a complete gen3 w/ partial harness, all the clips and plugs in place. so i plan on hacking my 165 harness at each plug, replacing it with the 205 plug.. then making one of these nifty harness adaptors, and plugging in my 205 computer...
Will it work? Will i have to change anything in my engine bay like the fuel relay or resistor? injector pack? igniter? etc, etc??

ON THE CONVERSION HARNESS: most of the connectors between both 165/205 ecu's will be an easy concept of: "A=A, B=B, etc.." but i know the 165 is AFM, and 205 is MAP, so i know there will be a hurdle there - do i just splice the MAP plug where the AFM used to be in the engine bay, and at the ECU's connect AFM=MAP?? What other hurdles will i have to overcome, either on the engine wiring or on the ECU side, esp with the differences between the two engines/harnesses?

anyone familiar with this, please let me know whats ahead of me.. never swapped between generations before, so i'm unsure what more is needed aside from the engine itself, and computer to run it... what other components of a Gen3 will i need? What headaches will the conversion harness bring?

THANKS!!! Cant wait to hear back...

ST165 to ST185 ECU Conversion

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