4zc1-t conversion. my way

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sandy
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4zc1-t conversion. my way

Post by sandy »

So after semi completing the build I thought id share a full write up with all my info in one spot.

Here is my 4z conversion thread for anyone who wants to do it the same why that I did. I read through all the different ones on ozgemini and everyone seems to leave out something or they all make it out to be like its bolt in. porbably would be if you just left to right swap the engine mount brackets.

I tested fit everything first in a rusty old s%*tty shell with 3 different methods.
I do it with the diesel cross member which you can see everything sat a while to far forward. After seeing a few other 4z cars not sure how much room youd get between the fan and the radiator but I suppose thermos would always be a good go.
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I did it was the engine left to right swap which actually sits a nice distance away from the firewall. If you still wanted to use the standard dissy only think I didn’t like was that it sat on a angle a little bit, not a great deal but enough to make we want to do it with the standard mounts. Ps I know the dissy is in the wrong way. I couldn’t get it to go in properly for some reason
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This one is with all the mounts standard. After test fitting it coxy said I ought to attach a gear box as it will change the weight distribution and the engine will sit differently which I hand though about so back out to test it all again
I still had clearance so I was happy that this was how id do it. I noticed when I looked underneath the car that the sump was hitting the steering rack so the engine needed to be spaced up. I used 4 or 5mm plate and drilled a few holes in to like it up with the hole in the x member. Probably ideally want to use 6mm plate and ill probably change it at some stage. As there was limited clearance for the dissy and I want to be able to just un bolt the engine and bolt in a standard g161 and have no one tell the difference I also opted to get a cas made up as with the standard the dissy cap being so large it would fowl on the firewall. The dissy ive end up with a ca lancer dissy modded to suit. Going to run a 4 coil set up but still have lots of wiring to go before its all in and running.
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note there isn’t supposed to be a nut sitting on the bottom of this sump but someone else welded it on. If you look at when I put the engine in the car you can see how much clearance it has and that’s with some spacing under the mounts.


Then came the time to actually fit the engine to the car. I got hold of an engine crane and a load leveler. This is definitely a nicer way to install an engine than having the gear box and engine smash around when you just use a chain on a block and tackle. Got the engine in but I found this time round I didn’t have the same clearance as last time so ive had to mod the brackets that bolt to the block and the engine mounts so as I have enough clearance. (well dad did it at work but you get the idea)

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so in order to gain clearance the engine needed to come forward about 10mm. so welded up the old holes where the brackets bolt to the block and adjusted the hole slightly where the engine mount bolt comes though to give the 10mm.
got a few comparisions which its hard to tell but that’s the whole idea.
The holes that bolt to the block had to go forward and the hole for the engine mount had to go back.
also had to make an adjustment to the gearbox mount bracket, needed to redrill the hole and weld the nut on about the same as the adjustment made to the engine mounts.

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this is the dissy(cas) ive got compared with a standard one. ive test fitted and fits in, just need to get a photo which is hard at the angle.
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hard to tell but give about 5mm of clearance. If you wanted more just adjust the holes more to suit. There is more clearance down lower at the firewall obviously so in the future ill look in to maybe trimming the actual fan box thing its self.

probably forgotten something so just let me know. happy to update and add to it if needed
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moley
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Re: 4zc1-t conversion. my way

Post by moley »

Good stuff
Coupe rebuild number 6..
viewtopic.php?t=44564
marksegec
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Re: 4zc1-t conversion. my way

Post by marksegec »

Thankyou for the writeup. Ill be doing this in a couple of weeks / months.

Im using a e1, going to use a d1 sump and modify it to fit. Have a feeling i wont be lifting the motor, but simply cutting and shutting the sump / mounts to suit. planned to keep the standard dizzy haha.

so shal see how i go.
sandy
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Re: 4zc1-t conversion. my way

Post by sandy »

If your going to be modding sump anyway just suit standard mounts
Might still require firewall mods from my understanding
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Jonno
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Re: 4zc1-t conversion. my way

Post by Jonno »

Might be a bit close. You should be ok.

Do you have the 4zd1 sump? Tims (BAD44U) is selling a decent conversion kit?
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marksegec
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Re: 4zc1-t conversion. my way

Post by marksegec »

Yeah ive got a complete motor there.
Burntrubber
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Re: 4zc1-t conversion. my way

Post by Burntrubber »

My 4zc1-t is in on standard mounts. Mods to get it in there were redrill gearbox x-member to bring it foward because the 4z pulls the box foward. 3mm spacers under engine mounts and small ridge on steering rack filed off to give 5mm clearance on the steering rack. Doesn't sound like much but it never rubbs. Fan cover and firewall right where dizzy is slightly modified to give only 5mm clearance and again it's not much but it never rubbs. I run 4ze1 dizzy as a CAS now no leads or dizzy cap just nice blank stainless cap and I don't think it would have rubbed without the cap with leads so firewall and fan cover may not have needed to be adjusted.
goldgem
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Re: 4zc1-t conversion. my way

Post by goldgem »

I did mine the exact same way burntrubber did his
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BAD 44u
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Re: 4zc1-t conversion. my way

Post by BAD 44u »

I think you will need more clearance these engines have heaps more power and when they twist you'll find the dizzy touching the firewall. You most likely break the passenger engine mount aswell. Looks good though
BAD 44u
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Re: 4zc1-t conversion. my way

Post by BAD 44u »

Also check how much yoke is in the gearbox no one ever checks this. Trimatic yoke is longer and can be used
marksegec
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Re: 4zc1-t conversion. my way

Post by marksegec »

Ill be moving the motor and box as far back and low as possible. que while ill be cutting the d1 sump to its minimum to fit.
sandy
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Re: 4zc1-t conversion. my way

Post by sandy »

why would the passenger side mount break?
i havnt had a chance to test the tailshafts yet, only just reassembled my torque tube assembly and yet to bolt it up
hopefull its just a easy yoke swap or something at the most
as for the dissy there is a fair bit of space, ill throw it in and upload a picture, hard to get a good photo though
sandy
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Re: 4zc1-t conversion. my way

Post by sandy »

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Burntrubber
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Re: 4zc1-t conversion. my way

Post by Burntrubber »

Well on 18 psi on stock engine I get no rubbing anywhere. Maybe with the head mods I wanna do it'll make more power so might twist over enough to rub. As for the tail shaft it goes on about 80mm factory moving box foward 15mm pulls yoke out 15mm so it's only 65mm still plenty I think surely something like an axle or torque tube would bust before that.
sandy
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Re: 4zc1-t conversion. my way

Post by sandy »

18psi is a fair bit for stock engine
What's the dyno reading?
I'm going to measure my s*#t for my tail shaft when I finally bolt torque tube back in
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