Oddball 20b conversion

stezhead54 · 07-06-2009, 04:26 PM

So, i'm currently in the middle of a 20b build. There's a lot more people on this forum who have done the build than the others that i'm on, so i'll post some of my questions/issues on here and see if anyone can help me out. First question/issue would be, if i want to keep the stock turbos what do i have to have controller wise. I've got a Microtech ltx12s to do the ems stuff. Second question....can i hook up the stock knock sensors....if so, how? If not what do i have to have to have a knock sensor that works(so i know if the engine is knocking or not) Third and final question for now, Has anyone used cop(coil on plug) coils on there build? If so, how did they work, or didn't they? So, i guess that's all for now, if you have any questions for me, just let me know and i'll be happy to answer. Here's a pic of the engine sitting in the car to see how far it is. I've still got to fabricate some mounts and do the driveshaft welding yet, but other than that it's almost ready to turn over. Just a couple more parts, and a couple more fabricating issues and i'm ready. On a side note, i'm doing all of the fabricating, and all of the construction myself, so if it doesn't look professional, it's because it's not. When it's done though it'll look as if the engine was meant to be in the car. So, until i do get it finished, here's one picture of the car.

djmtsu · 07-07-2009, 10:37 AM

What the hell car is that in?? The GM master cylinder has me thinking Camaro.

Which would be awesome.

stezhead54 · 07-07-2009, 11:59 AM

That would be correct. It's an 86 iroc z the engine died on me, and i had the 20b on hand(was going to put it in a v6 firebird, but that didn't work out) so i decided to drop it in.

FerociousP · 07-07-2009, 12:12 PM

Quote:

Originally Posted by stezhead54

i had the 20b on hand, so i decided to drop it in.

I get so tired of saying that...

/sarcasm

Bryan@BNR · 07-07-2009, 01:59 PM

I'll trade you an LQ4 motor with all its sensors and EMC for that 20b

stezhead54 · 07-07-2009, 02:22 PM

and explain why i would want to do that? I took the 305 out of it to put this in.

djmtsu · 07-07-2009, 02:51 PM

Quote:

Originally Posted by stezhead54

and explain why i would want to do that? I took the 305 out of it to put this in.

He wants another 20B.

Bryan is a whore.

classicauto · 07-07-2009, 03:19 PM

Damn thats a sweet swap.

We want more pics, I don't care if its not done yet.

And please put one of those "out of a job yet keep buying foreign" stickers on the back when its done

stezhead54 · 07-07-2009, 03:56 PM

I'll take some more pictures today and put them up for everyone to see. Anyone have any answers to my questions though?

***Herblenny*** · 07-07-2009, 04:09 PM

LMAO!!! This is awesome! Can't wait to see it all finished up and 'beating' V8s on the road

need RX7 · 07-07-2009, 04:13 PM

Holy crap, that is awesome.

TitaniumTT may be able to help you out with the turbo stuff, he has a 13B-RE running the twins sequentially. Not sure about the similarities between 20B twins and 13B twins, but it's worth a shot.

***Herblenny*** · 07-07-2009, 04:35 PM

If you want to run 20B twins, call BNR. He does an upgrades for 20B twins and people are making great power (In AUS)!

Phoenix7 · 07-07-2009, 04:53 PM

well first he needs to get info on the knock sensor then info on the "coil on plug" thing....he seems to have the EMS covered already...

I've heard of people using FC coils or LS coils but don't know about teh specific type you mentioned.....your best bet is to chill for a bit here and wait for the other 3-rotor peeps read this thread and tell you what they used.

stezhead54 · 07-08-2009, 12:46 AM

So i took some more pictures tonight. They aren't much better than the other ones cause it was dark out....maybe in the near future i'll have to roll it outside and take some pictures. Also, the coils i'm using are coils from a v6 where they sit down a well right on top of the plugs. I went this route so i don't have to worry about wires or anything. All i have to do is wire up the coils, plug them in, and start it up(very simply put) As for the knock sensors, they're just the stock ones that came with the engine. What i'm trying to figure out is how i'm going to hook them up to either the ecu, or say a light inside the cabin to tell me if there's any knock going on.

classicauto · 07-08-2009, 12:01 PM

As far as the knock sensor's go, you'd have to check the outputs/inputs on the microtech to see if there's a channel that can read them. Most good ECU's have this feature, but I'm not sure on the microtech. However, what I do know of the microtech is that it has EXTREMELY limited inputs/outputs available, IIRC, the LTX12s only has 1 auxilary output to be used for a fan, fuel pump or whatever. So if I had to guess, I'd say you can't hook the knock sensor(s) up to the box.

But check in your manual.

You really can't hook up a light to the sensors themselves, they just create tiny amount of voltage based on the level of knock. And there will be a threashhold where you have "knock" but not enough to worry about and this level varies between engines and sensors.

07-07-2009, 10:37 AM	#2
djmtsu My minds tellin' me no... Join Date: Feb 2008 Location: Murfreesboro, TN iTrader: (10) Posts: 4,043 Rep Power: 21	What the hell car is that in?? The GM master cylinder has me thinking Camaro. Which would be awesome. __________________ 1976 Mazda Cosmo RX-5 1976 Mazda Cosmo RX-5 2003 Toyota Tundra TRD 2015 Toyota 4Runner SR5

07-07-2009, 04:09 PM	#10
*Herblenny* Founder/Administrator/Internet Pitbull :) Join Date: Jan 2008 iTrader: (11) Posts: 644 Rep Power: 10	LMAO!!! This is awesome! Can't wait to see it all finished up and 'beating' V8s on the road __________________ DGRR 2013 - Year of 13B www.DealsGapRotaryRally.com http://www.facebook.com/Herblenny

07-07-2009, 04:13 PM	#11
need RX7 Clean S4 Nutswinger Join Date: Mar 2008 Location: Sterling Heights, MI iTrader: (0) Posts: 485 Rep Power: 17	Holy crap, that is awesome. TitaniumTT may be able to help you out with the turbo stuff, he has a 13B-RE running the twins sequentially. Not sure about the similarities between 20B twins and 13B twins, but it's worth a shot. __________________ -Ted -1986 Mazda RX7 Sport [DD/beater]: engine finally let go at 205k. parts car status. -1986 Mazda RX7 base [resto-mod project]: S5 n/a swap in progress.

07-07-2009, 04:35 PM	#12
*Herblenny* Founder/Administrator/Internet Pitbull :) Join Date: Jan 2008 iTrader: (11) Posts: 644 Rep Power: 10	If you want to run 20B twins, call BNR. He does an upgrades for 20B twins and people are making great power (In AUS)! __________________ DGRR 2013 - Year of 13B www.DealsGapRotaryRally.com http://www.facebook.com/Herblenny

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07-07-2009, 11:59 AM	#3
stezhead54 The Newbie Join Date: Jul 2009 iTrader: (0) Posts: 12 Rep Power: 0	That would be correct. It's an 86 iroc z the engine died on me, and i had the 20b on hand(was going to put it in a v6 firebird, but that didn't work out) so i decided to drop it in.

07-07-2009, 01:59 PM	#5
Bryan@BNR Rotary Fanatic Join Date: Feb 2008 iTrader: (2) Posts: 302 Rep Power: 17	I'll trade you an LQ4 motor with all its sensors and EMC for that 20b

07-07-2009, 02:22 PM	#6
stezhead54 The Newbie Join Date: Jul 2009 iTrader: (0) Posts: 12 Rep Power: 0	and explain why i would want to do that? I took the 305 out of it to put this in.

07-07-2009, 03:56 PM	#9
stezhead54 The Newbie Join Date: Jul 2009 iTrader: (0) Posts: 12 Rep Power: 0	I'll take some more pictures today and put them up for everyone to see. Anyone have any answers to my questions though?