recently acquired built 7mgte, have questions

[jeddyminit]

Hello everyone,

So I recently acquired a built 7mgte.
Has:
A larger turbo (not sure about the specs at the moment)
Adjustable cam sprockets/gears
Bigger injectors (not sure on the cc but they're definitely not stock)
I haven't pulled off the valve covers yet to see what the camshafts look like.

I have made a deal with a buddy of mine that I pick up this motor from him, which he has no background knowledge of the motor and i will perform a leak down test on it. If everything checks out okay, I will then pay him for the motor. (he acquired this from a running parts car)


My question is:
Would I be able to slap on a stock CT26 and stock cam sprockets,injectors and run the motor on a stock ecu with no problems?
What if the camshafts are aftermarket, would this affect the performance of the engine with stock turbo, stock injectors, stock cam sprockets?
any other tests that should be performed?

Before anyone bashes on me, I want to put out there that my reasoning for wanting to do this is to get my supra back up and running.
My supra has been registered on NON-OP and will need to be smoked.

Any help is appreciated.

 

[kakanator]

you got any up closes pics of the injectors? and I don't see why you cant run ct with cams and gears should run with stock ecu. As lone the ecu is yellow plug.

 

[jeddyminit]

you got any up closes pics of the injectors? and I don't see why you cant run ct with cams and gears should run with stock ecu. As lone the ecu is yellow plug.

I'll snap a couple pics of the injectors when I get a chance.

 

[Kckazdude]

Taking all that stuff off should allow the stock ECU to control the timing to acceptable limits if the cam isn't a full out race cam. Another option is to pick up a set of stock cams for piece of mind. They are all over the place these days.

 

[jeddyminit]

Taking all that stuff off should allow the stock ECU to control the timing to acceptable limits if the cam isn't a full out race cam. Another option is to pick up a set of stock cams for piece of mind. They are all over the place these days.

Wouldn't I have to get the head machined for the camshafts though?
I would probably have to use some plastigage and measure the clearance though I assume?..

 

[kakanator]

You would just try to find some stock cam that are not rapped with scores and gouges and yes plastigage all the caps most likely you will not need to machine them.

 

[jeddyminit]

You would just try to find some stock cam that are not rapped with scores and gouges and yes plastigage all the caps most likely you will not need to machine them.

hmm.. I do have a pair of camshafts in my garage that i could just throw on.

 

[jeddyminit]

I have been told the motor has oversized pistons, would i possibly run into any problems with that in terms of smogging the vehicle?

i haven't gotten the chance to perform a leak down test on the motor yet but are there any other tests you guys recommend me doing? (besides compression)

 

[Kckazdude]

Leak down test is more comprehensive if you have the tool. Oversize piston should not affect driveability

Sent from my 6045O using Tapatalk

 

[jeddyminit]

update: performed a cylinder leak down test on the motor.
Cylinders 1-4 have about a 5- 10% leak
Cylinders 5/6 have a 10-15% leak (does this seem normal?)

Any input on this?

Also, since the motor is on an engine stand the cylinder leak test was NOT done warm.

 

[Kckazdude]

That is within tolerance. Anything over the ~15% would be a problem. If it has been sitting not running for a while that could easily explain the higher numbers as well. Make sure the front and rear crank seals aren't leaking and drop it in. Should have a running car after next week.

 

[jeddyminit]

That is within tolerance. Anything over the ~15% would be a problem. If it has been sitting not running for a while that could easily explain the higher numbers as well. Make sure the front and rear crank seals aren't leaking and drop it in. Should have a running car after next week.

Im going to open up the oil pan to redo the gasket job the previous owner did. would it be a good idea to re-torque anything on the bottom end?

 

[jeddyminit]

UPDATE:
Motor looks to have ARP studs, would it be a good idea to do a re-torque on them?
I'll be replacing gaskets all over the motor due to a crappy rtv job.

for some reason, the oil dip stick was missing, so ill be opening up the oil pan just to double check.

 

[jeddyminit]

Here are a couple more pictures of the motor.
I popped off the valve covers and can't seem to figure out if the camshafts are stock or not.

 

[kotu100]

As someone that has bought an already built engine, my advice to you is to get EVERYTHING double checked.
Have the entire rotating assembly checked, all clearances and bolt/nut torques at the very least.

 

[jeddyminit]

As someone that has bought an already built engine, my advice to you is to get EVERYTHING double checked.
Have the entire rotating assembly checked, all clearances and bolt/nut torques at the very least.

i am glad i took the time to crack open the oil pan, i found the thrust bearing at the bottom of the oil pan. any idea what would cause this? its been a while since i did a rebuild on the motor, what exactly would be my next step?

 

[kakanator]

from what that picture looks like the cams are stock if they are aftermarket there will be a stamp on one of the flat spot.