Use 7mgte block as a 7mge??
 

I have a fully built 91 7mgte block with Probe forged pistons bored .20, eagle rods and arp supporting hardware. I am purchasing a non-turbo 86.5 supra that has a rod knock. I was wondering if I can just use the block I have and use it in the 86.5, using my redone 7mgte head and built block. I am new to this and do not know much about these motors.

is the 7mge and the 7mgte the same internally other than the oil squirters? and could i run the stock turbo set up on my stock 7mge?

Yes, you can. You will need to swap the ECU and Engine harness. I think the 91's have more sensors than the pre-89's. Also, you need to transfer other items from the turbo car to the GE car, i.e. igniter, boost sensor, turbo fan clutch assy, etc.

I'm assuming the 86.5 has a better body condition than the 91.

Well the 91 7mgte is just the motor and head. I do have the ecu and harness to it as well and a few other parts. I was trying to see if it was possible just to swap the block and head itself?? And if everything from 86.5 7mge will bolt up to the 91 block and head?

The GTE has lower compression pistons, so, if you've used stock spec pistons or ones with an even lower CR it'll be a dog of a N/A. The oil squirters are a bonus.

As for mounting parts everything I can think of will fit fine, but the GTE uses two knock sensors bouth mounted outward from center and the GE uses only one mounted ner the center. To use the GE electronics you'll either need to use two knock sensors and splice the wires into the one line that runs to the ECU OR you'll need to drill and tap the center boss for the GE's knock sensor.

Intake cams are different, you'll probably want to swap those as well.

Motor mounts are also different.

Other than those few things there's nothing else that isn't evident.

Oh, and you'll want to run GE spark plugs

Thanks alot, I have probe forged pistons that have the stock spec compression, but a lil bigger. As far as the mounts, could I use GE mounts and work on them (weld etc.) Or am I going to have to fabricate some? or do I just find some GTE mounts?

As far as the cams, I have the GTE head with cams and the intake. Will that work withe the GE stuff?

yeah, just swap the mounts.

I highly recommend swapping the intake setup over.

cams will probably be fine. The intake is the only different one.

I really appreciate the info. So the GTE intake, head and block is the way to go?

I should be good then, as I do have that stuff. Thanks a lot and I'll be posting some pics of the work as I go along. (If I can figure out how)

Again: GTE- Intake setup, head, block (splice GE harness for sensor), and mounts should work with the GE car and everything else.

Thanks

i have a turbo setup off a 88 supra and from what i can see the wiring harness is the same other than the fact of splicing into the igntion system for the fact of it not being the 90 model where there is more sensors. can my harness work and will it plug into the gte ecu?? And i can just run electric fans rather than the clutch fan assembly you said i should swap over right?? And i also belive that i have to change over the intake manifolds to, right??

no. GE intake. GE mounts.

posted from my phone. sorry for any typos and poor grammar

Ok, gotcha man. So the GE intake will fit my GTE head. Cool deal I really appreciate the info. I will try to keep posted on this preoject.

Thanks again

there are a number of supporting components you will need to swap over, no short cuts, or you will lose even more power

Ok, replying from my phone sucks!

Pretty much plan on replacing ANYTHING that looks different or it on the GE but not on the GTE.

ok thanks and why when i pull my spark plug wires do i see a small amount of coolant? And what should i do for the oil return and oil feed lines to the turbo? and can a just splice into the coolant lines also? and i also dont need my maf anymore correct?

There are coolant plugs under the spark plug galley cover. The four giant hex bolts are plugs to oil passages, you need to remove those to get to the coolant ones below the cover.

Oil feed is easy, there's a plugged 1/8 BSP oil pressure port between the oil pressure sender and the thermostat neck... actually, it's right behind the thermostat neck.

The return is troublesome. You need it as high as possible, but there is NO drilled port for it. The two possibilities are having a machine shop drill the boss (as it is on the GTE... MUCH preferred!) or drilling the oil pan as high as possible and welding in a bung... this MUST face a main, not a rod or weight and it MUST enter angling downward (it is a gravity drain).


Coolant's easy, there's a bypass which is employed to relieve suction on the thermostat that's on the thermostat neck. You'll notice it by the huge banjo bolt on the right side of the thermostat neck and it goes down to one below... ad hose so that that tiny circuit now runs through the turbo.


I have no idea what the hell you're talking about... First, you don't have a MAF... you have a VAFM (there is a difference ;) ). Second, the GTE has a KVAFM. The only 7M's which didn't have one of these type of AFM was a certain model race car (which never left Japan, AFAIK) which utilized a system which calculates air mass based on temp and manifold pressure like the 1JZ-GTE and 2JZ-GTE use (2JZ-GE uses a KVAFM).

You can delete one through the use of additional hardware, but without any such devices you'll have an AFM.

For more info on the types of sensors read these Toyota articles:
http://www.autoshop101.com/forms/h34.pdf
http://www.autoshop101.com/forms/h35.pdf

thanks your a great help, do i need to relocate my oil filter or run an oil cooler? and are those coolant plugs easy to replace?

The coolant plugs ate threaded plugs, AFAIK.

Oil cooling is essential and it's really a good thing to have on any car... whether the manufacturer was too cheap to put one in or not. I've posted more on the matter before with links to some VERY good information on another forum.

i also heard that you can run the stock 7mge injectors because those are bigger than the sotck 7mgte injectors, is that true? and ive also heard that the head gasket will not last to long on 10 psi, what do you think?

I don't know who you're talking to, but you need to stop listening.

lol i will stop listneing thats why im on the forums now. but that didnt answer my questionslol?

Sorry, the injector BS threw me off... GTE injectors flow approx 33% more than GE injectors peak.

No, stock HG's don't hold up well in a N/A-T (I just replaced mine with a thicker MHG actually.... so much for being the exception. :( ).

All of this has been answered on here before... do some digging and you'll find the rest of the answers you'll need.

ok so i have almost all it done an when i went to tap into the oil pan for a oil return there was a threaded bolt at the very top of the oil pan kinda in the middle can i use that?? and i have the 7mgte ecu but im running it off the 7mge harness cause it plugged right in, does that just need the 2nd knock sensor wired up because there a 4th small 3 wire plg that runs of the 7mgte ecu that i think is for the additional sensors. and will i be ok with the 7mge cams or should i change them out. also other people said the 7mge internals wont hold up but as i have read so far you have done all this with a 7mge motor internals and it seems to be working for you so thats why im asking you these questions cause other people dont seem to know what there talking about and the only thing that im doing differently is using 7mgte electrocs but.

You haven't really read my posts have you??? I'll recap.... I'm in the middle of a REBUILD!!!!

As for the harnesses, there are a number of differences and I'm not going to go into how to hack a GE harness into a pre89 GTE harness... hell, I've answered ALL of these questions previously... search a bit. And NO the plug in the oil pan is too high and IIRC doesn't face a main bearing.