GX81 2jz/auto Conversion Q's, Mainly Speed Sensor

[Z2TT]

Hello,

I'm Doing a 2jz-gte GX81 Conversion Soon using either Aristo JZS147 or JZS161 Donor motor into a Series 2 GX81 (1989), got a few Points I needed some info on.

1. Gearbox used will be Aristo box, so will be getting driveline
place to modify Aristo drive shaft and GX81 shaft and make a Hybrid.

But for example if I don't have the original Aristo shaft with me, is there any shaft that can bolt upto the Aristo 3 bolt flange
and be the correct length to mate upto GX81 rear housing, or will the Aristo flange be fouling on chassis and better to just cut that flange off and get custom shaft welded/made?

2. As the Original Aristo extension housing will be used, will the GX81 Speed Sensor fit into it?
and be able to be driven without a problem? Else if not possible, is there anyway to build a circuit to modify the Signal from the Aristo Sensor to work with the GX81 Digi Dash?

2. What are the best Engine brackets to use that sit the motor in the optimal position re-using original rubber mounts, e.g not hitting firewall but yet not too far toward radiator so to give enough room
for mounting fans, cooler piping bend etc. JZX90 brackets left to right right to left (Swapped around) seem to be recommended lots, would JZX81 brackets give the same position as jzx90 ones or even be better? Would prefer something that sits it well on the rubber mounts e.g not sitting on half of the mount and shaking around a lot.

3. For Cooling, I like using viscous fans over electric, is there any Shroud and fan combo that will line up nicely? E.g MX83 Shroud and JZZ30 clutch and JZZ30 fan, or even MA70 fan if the blades
are not too big.

Thanks.

Cheers.

[dumbass]

pretty sure ealry aristos had speed sensor on gbox
so just wire it up to that ,
if its inaccurate then worry bout that later,
later aristos i think had no speedo sensor on gbox for the speedo
as it all runs thru abs on aristos
so then u need to work something out after that
i run a special black box signal module or u can just fit a gaycar speedo correction box running of the other sensors to get speedo working

[wilbo666]

Hello,

I'm Doing a 2jz-gte GX81 Conversion Soon using either Aristo JZS147 or JZS161 Donor motor into a Series 2 GX81 (1989), got a few Points I needed some info on.


2. As the Original Aristo extension housing will be used, will the GX81 Speed Sensor fit into it?
and be able to be driven without a problem? Else if not possible, is there anyway to build a circuit to modify the Signal from the Aristo Sensor to work with the GX81 Digi Dash?

Thanks.

Cheers.

Hi Wilbo,

I've been reading this thread here where you posted :

http://www.toymods.org.au/forums/tec...nformatio.html

I'll either be using jzs147 or jzs161 engine/autobox to convert into a GX81, which I am very sure originally uses a 4ppr 3 wire speed sender.

From what I read, the Aristo does not have a 3 Wire Speed sender that is powered, grounded and one signal wire to dash. [wilbo666: Incorrect - JZS147 does, JZS161 does not]

And that it sends its Road Speed signal directly to the ECU, then the ECU Sends it to the Dash. [wilbo666: Incorrect, the only 2JZGTE that I know does this is JZA80 VVTi 2JZGTE Auto]
I'm taking it that since that Sender on the Aristo Box gives 12ppr, I need to build a circuit that taps into the
Sender--->ECU Wire, and the modify the Signal to send to my GX81 Dash signal wire for the speed display to driver. [wilbo666: FYI, JZS161 has 12 pulse per rev, JZS147 is 4 for the 2 wire sensor.]

So I'd have it connected like this? would the folliwng be correct?


JZS161 2wire Speed sensor output wire-----((Splice into wire here, build circuit and feed output wire of circuit to dash)-------> ECU-----> Dont connect output wire from ECU nowhere. [wilbo666: That could work to get a speed signal to the dash, but the JZS161 engine ECU doesn't have an output wire...]

Then Pink wire from GX81 Dash will send its signal correctly to all other ECU's (TEMS etc) that need that signal.


I was just confused about the sensors, how lots of Toyotas have a 2 Wire (SP2+ and SP1-) Wire... and then a 3 Wire one.
The aristo just has a 2 wire one and that's it? Which wire from that one is the output to ECU? [wilbo666: Only JZS161 has only a 2 wire one. There is no output from the engine ECU in JZS161]

Cheers.

I'm answering here as opposed to your PM, next time just send me a link to your post as opposed to a PM so the next guy who has the same question has a chance of finding an answer

Firstly this page on my wiki is relevant...
http://wilbo666.pbworks.com/w/page/5...peed%20Sensors


In regards to the speed sensor it depends of if you go JZS147 or JZS161.

JZS147 has a conventional 3 wire speed sensor for the dash located on the gearbox (and the two one speed sensor). You can use the cable fitting from a non electronic A340e to convert from electronic speed sensor to cable if required (I've done it myself). You will want to make sure the small nylon drive gears are match / are suitable if you do this. I'm not sure the exact type of sensor that GX81 has but I suspect it is the version that screws into the 'cable' speedo give section (i.e. you could screw in a speedo cable, or the 3 wire sensor at the gearbox) so this is what you would want to do in that case.

JZS161 does not have a 3 wire speed sensor. You are correct it only has the 2 wire speed sensor. However the JZS161 engine ECU does not output a SPD signal to the dash (I think you are getting confused with JZA80 2JZGTE VVTi auto which does that unconventional arrangement!). JZS161 sends the speed signal to the dash via the multiplex network I believe.



PS, you have two, 2's in your list!


Cheers
Wilbo

[triptek]

Your better off using jzx81 mounts as it gives a little bit more room near the gx81 booster and it also keeps the harmonic balancer off the sway bar when the cars jacked up.

JZZ30 clutch fans fit but the blades need some trimming. The best setup i'v come across is using a jzx100 vvti waterpump and clutch fan. Or another option is to use a jzx81 rad and hydro setup.

[Z2TT]

Thanks guys,

Sounds Good, if I get jzs147 I'll just mount the Original GX81 Speed Sender into the Aristo box and for JZS161 I'll tap into the 2 Wire sender output wire and bring it to the dash signal wire,
Cheers for the heads up Mark I'll see if I can chase down a set of JZX81 Brackets.

For Cooling I'll put in a SPAL or Davies Craig 16" Fan in there it should do the tick.

[PlacentaJuan]

i have just pulled out my electric fans and am about to replace them with a clutch fan

shroud from mx83, fan from mx83 and a modified clutch from driftmotion.

[Z2TT]

Interesting, why does the clutch need to be modified? are they too long and cause fan to hit radiator?

I was wondering about jzz30 clutch perhaps.

Failing that I'm sort of decided on Electric fans if the Clutch fan route is too tricky. Just deciding whether to go SPAL or Davies Craig, want something that flows more at given RPM and is better quality and the quieter one of the two brands.

16" Seems to be the biggest available and would probably cover the radiator top to bottom without a problem.

Mark how much trimming are we talking about on the fan blades, is it something a bench grinder could do or are we talking 1cm+ cutting required as it is too big?

If anything i was thinking 7m-ge fan would fit in the factory mx83 shroud, just attached to a jzz30 clutch if possible.