OK I did a search of "VTC" in all motor and found a total of 3 threads that mentioned something about 3.0 ECU with VTC. 2 Said use Greddy EManage and one said SMT-6/7.

The SMT-6/7 thread said that you may through a code because timing is advanced/retarded too much.

The purpose of this thread is start a flame war .... jk ... talk about the PROS and CONS of using a piggyback to control VTC with a 3.0 ECU, will it throw a code, and will it do it as well as the true 3.5 ECU.

 

Don't everyone respond at once please ... bump

 

negative, it can't be done. The Emanage Ultimate cannot control nissan's flavor of variable cam timing. And, you're confusing ignition timing with variable cam timing (ex. VTEC).

In addition, the 3.0 ECU requires the use of the 3.0 sprockets and timing components in order to use the 3.0 cam position sensor. So, even if the E-U could control nissan's VTC, you still wouldn't be able to use VTC AND the 3.0 ECU.

 

I wasn't confusing the timing ... I just repeated what I saw in a thread, but thanks for clearing it up. So to restate what you said, don't even think about it.

Damn ... the low end with VTC wants to make me cry, but oh well. The weight of a 95 should compensate for the extra ponies/torque anyway. The only thing holding me back from the swap is that I can't justify throwing out a working engine.

SOOO even if I were to go about the swap, where can you sell off your working VQ30 and throw out a number of how much you would get for it if it had 120K.

 

It'll be hard to get much money for a VQ with 120k miles on it. They're a dime a dozen.

The way I justified it was that I won't have to go out and buy a G35 to get similar performance. That'll save me a lot money in depreciation.

 

Are you sure about that?

Theres a way to control variable valve timing with the SMT-6 and 7, but it's not easy and it's not pretty.

If I can get the thing working and sim the CVTC signals I will post more about it, but don't expect anything for a while. I have a million other projects to do first, like replace my cooked engine.

 

Even if you did get the smt6/7 to control the VTC, what are you going to do about the camshaft pos. sensor? How's the 3.0 ECU with 3.0 cam pos sensor going to read the 3.5 sprockets????

 

Yes it can be done.

 

what about the cam pos sensor?

 

If you removed it there would be an open hole for oil to pour out.

Seriously though what does that have to do with the VQ30 ECU?

 

Look at the title of the thread "3.5 swap -> 3.0 ECU ->VTC possible with piggyback."

If you want to use the 3.0 ECU with a 3.5 engine, you must use the 3.0 cam pos. sensor. The 3.0 cam pos. sensor cannot read the 3.5 sprockets. Therefore, even if the SMT 7 or E-U could control the VTC, you still couldn't use it if you're using the 3.0 ECU.

 

It really isn't a cam position sensor because the cam does not change timing. That is really just another crank sensor.

 

True, but the engine will not run without it.

 

Yeah, and?

 

mytenchars