What engines are Hot, Hp and fuel economy?

[MarkIIRx12]

Hi again

Looks like i will end up with the 7m-ge for now, if its not too thirsty i assume its a good upgrade.

as far as i know, the mark II have a diffrent travers from R to M, but except that they are pretty much the same, is this correct?

anyone have or know about a guide for R to M upgrade? since it comes with a gearbox i will use that and have the correct bellhousing and such, but im wondering about the engine mounts, or any other problems i might encounter.

[Bored?]

I think it would be silly to put in a 7m-ge when in terms of the cost of the whole conversion a 2jz-ge would cost almost exactly the same, yet be a newer and more reliable engine at the same time. Or for not much more you could probably put in a 1jz-gte and have even more power.

As for engine mounts, making them for any engine really isn't that hard. Even if you don't have the skills to do it, you probably know several people who do. Getting a custom tailshaft made up is simply a matter of paying someone a few hundred dollars to join the two and balance the whole thing.

[ViPeR_NiPPleX]

I think it would be silly to put in a 7m-ge when in terms of the cost of the whole conversion a 2jz-ge would cost almost exactly the same, yet be a newer and more reliable engine at the same time. Or for not much more you could probably put in a 1jz-gte and have even more power.

As for engine mounts, making them for any engine really isn't that hard. Even if you don't have the skills to do it, you probably know several people who do. Getting a custom tailshaft made up is simply a matter of paying someone a few hundred dollars to join the two and balance the whole thing.

depends on what gearbox you use. 7M would be easier, 2JZ is better in every other respect.

[joecoolmk2]

if you can find parts from an MX10/12/13 the 7M conversion would be a piece of piss.

[MarkIIRx12]

Thanks again for ur answers.

Well im sure a 1j or 2j would be a better engine, but for me, to get a 1j or 2j i would need to import a engine to get a hold of one, so the cost diffrence between 7m and a J engine is huge, but of course newer is better in everyway. Besides that 200hp is more than enough for me since the car is just going to be a daily driver.

Wich parts should i be looking for from a mx corona to make the upgrade easier? engine mounts only?

[crowncustom]

It depends on how easy it is where you are to aquire a MX crossmember.If you can't then the easiest way would be re-position the engine mounts further back on the RX crossmember.I assume that you are running a W40 or W50 gearbox?If you are running the W series box then it should be an easy swap.What you will need to do is find an M series bellhousing and swap it over(but the M bellhousing needs to be from W40 or 50 as the W55 or Supra style box has a different bolt pattern on the gearbox.)but if you do have the Supra syle box then that should bolt in where the W40 or W50 is.
You will have to cut the engine mounts off the RX crossmember before you put the 7M in.Once you have done this bolt the 7M to your gearbox and lower the engine in and work out where the engine mounts need to be positioned and weld them in.
By the way what sump does the 7M have?If it is a mid hump sump then there will be no problems if not you will have to source one.
Hope this is of help to you.
Cheers Brett.

[MarkIIRx12]

Thanks again

i dont remember exactly how the crossmember looks like now or how its mounted, but to change crossmember then i have to change almost the entire front suspension and everything, right?

probably better deal to just cut and weld my old mounts back on in the right spot then. how much more forward are we talking about i have to move them? 5-10 centimeters?

[crowncustom]

Yes you would have to change the entire front end so the easiest would be to cut and re weld the engine mounts.
Here are some pics I just took of the differences.









The first 2 pics are of my MX 22 coupe which had the 18R in it.As you can see in the first pic that the engine mounts have been cut of and re welded 70mm forward to put the 18R in.
The 2nd and 3rd pics are of my MX 10 spare parts car which shows where the M series engine mounts are.So going from R to M engine you will need to move the engine mounts back 70mm toward the firewall end of the crossmember.
As to your gearbox mount you should be able to bolt the gearbox you get with the 7M straight to the existing mounts.
Here is an engine pic also of my MX 10 with 1G-GE which will most likely find its way into the MX 22 coupe unless I can find a twin turbo setup for the 1G-GZE I have in the shed.

[MarkIIRx12]

Thanks for the pics, very helpfull

so i can use my existing mounts, just cut them off and move them? 70mm, cool now i even have the measurements, saving me for a lot of "engine in and out of the bay work"

the oilpan has a mid sump, its from a supra, would i need to get a new oilpan from a cressida?

i also wonder what you guys choose to do when it comes to fuel pump and return lines on theese cars? any good and easy setups there too?

that 1g-ge looks like a nice and clean engine in ur car, if it wasnt for this cheapo 7mge i would definitly be looking for a 1g of some sort.

[MarkIIRx12]

just a thought, when istalling an M engine, the engine mounts needs to be closer to the firewall than with the R engine, right? wont that M engine become very front heavy? wouldnt it be more logical be to move the M mounts closer to the radiator?

anyone knows approx weight for a 7m?

[crowncustom]

Your sump on the Supra engine is the right sump you need for the conversion.As for the fuel pump any high pressure pump should be fine.With the fuel lines just use the lines that are already in the car(thats what has been done with my 1G MK 2).
When you do the conversion bolt the gearbox in first and set that up then bolt the motor to the gearbox which will make it easier for you to position the engine mounts to the crossmember.It will be a pain but you should only have to take the motor out once.
Cheers Brett.

[crowncustom]

just a thought, when istalling an M engine, the engine mounts needs to be closer to the firewall than with the R engine, right? wont that M engine become very front heavy? wouldnt it be more logical be to move the M mounts closer to the radiator?

anyone knows approx weight for a 7m?

Yes the mounts will need to be closer to the firewall but once you have the motor positioned you will see the differences.If the mounts were moved closer to the radiator then the gearbox would be further forward and you would need to modify the tailshaft plus gearbox mount plus you wouldn't have much room for the radiator.
Weight wise someone on here should be able to quote a rough estimate but believe me they are heavy.
Cheers Brett.

[MarkIIRx12]

Thanks again for ur info, very helpful.

well i dont really mind the extra front weight, all my mark II's with 18R's have always been rear heavy, so to get additional 70-80kg or something like that i think would make the weight more equal.

fuel lines, hmm i dont think mine have any return line, or is it still there somewhere even if its not in use?

if i dont have any return line, whats the easiest way to hook one up to the tank, and can i put the fuel pump beside the tank in the trunk or does it need to be under the car?

[joecoolmk2]

yes, there is a return line. just checked mine

[crowncustom]

Thanks again for ur info, very helpful.

well i dont really mind the extra front weight, all my mark II's with 18R's have always been rear heavy, so to get additional 70-80kg or something like that i think would make the weight more equal.

fuel lines, hmm i dont think mine have any return line, or is it still there somewhere even if its not in use?

if i dont have any return line, whats the easiest way to hook one up to the tank, and can i put the fuel pump beside the tank in the trunk or does it need to be under the car?

I would say that there would be a return line.The MX 22 and GX 10 has fuel line and return but the MX 10 has 3 but this one is a 74 model where as the other 2 are 72's.
No probs in running the fuel pump beside the tank as this is where the G powered one is mounted.
Cheers Brett.