What are the differences in the 7m turbo and non-turbo heads? Can you use a 7mgte turbo and manifold on a 7mge?
Heads: 7mgte vs 7mge
- Thread starter mmmjesse
- Start date
On the NA head the distributor is gear driven by the gear around the exhaust cam, and for the turbo engine they use a CPS instead (cam position sensor) which is also powered by the gear on the cam. So what I'm saying is, the only real difference is the cams, but even still, you can run NA cams on turbo engines and vice versa, however turbo cams on an NA engine isn't an upgrade.
eric
eric
I see what your saying. Does the turbo and manifold have any clearance issues with the distributor? So if they are the same, then couldnt i use a 7mge distributor on a 7mgte head?
Turbo mani bolts up fine, only thing that might not fit is the accordion hose (intake hose) that connects from the intake to the turbo. The distributor I don't know for sure if it works with turbo electronics, it was my understanding it only worked with NA electronics/computers.
eric
eric
thanks for replying so quickly, your being extremely helpfull. Just to shed some light on things, i have an 86 cressida. I was planning on doing a 7mgte swap but i really dont want to do any rewiring right now. So i was trying to figure out a way to use a distibutor and not coil packs. I was originally going to do 7mgte bottom end with 5mge head, but i dont like using a 4 valve piston with a 2 valve head. That and it becomes an interfearance motor and has really low compression, supposibly 8:1 compression if not lower. So i was thinking i could use the NA head w/distributor or just the N/A distributor with turbo head. What do you think?
If you're talking about using the 7m block, and keeping it NA then either turbo or NA 7m head with distributor is good. I'm not sure, but you will most likely have to do wiring since there are sensors on the engine and I'm not sure if the yare the same as the cressidia. What I mean is there is no way you can drop the 7m in and plug in your old harness. Back to the first point, you could still put a turbo on the NA block and keep the distributor no problem, the engine will be high compression tho, which isn't always favorable in turbo applications. Do you have a turbo block right now and an NA head or something?
eric
eric
so the plan is to use a 7mgte with 7mge distributor with the stock 7mgte turbo setup. Thats for now atleast.
ummmm, why dont you just throw a turbo on you're GE, then use turbo pistons? or even keep the n/a pistons, just run below 12psi? easier, and more cost affective.
and the difference between the heads is that the N/A intake cam is slightly better than the turbo's.
and the difference between the heads is that the N/A intake cam is slightly better than the turbo's.
well, my cressida doesnt have a 7m in it. Its got a 5m and ive got the 7mgte motor already. Im just trying to simplify my wiring as much as possible
Maybe I misread something but using the 7MGTE CPS will be the simplest path. If you try to run the 7MGE dizzy you have to swap in a N/A wiring harness as well as find a 7MGE ECU. Seems like a lot of work to me.
What wiring exactly are you trying to avoid?
What wiring exactly are you trying to avoid?
considering the fact that you already have a 5m in there, you're going to HAVE TO do wiring anyway. you may as well just get a GTE harness and use it with a GTE ECU of the same yearspan. then it'll be plug and play with the motor and ECU, and you'll just have to figure out something for gauges.
(now's a perfect time to get some good aftermarket gauges!)
-shaeff
(now's a perfect time to get some good aftermarket gauges!)
-shaeff