Maximeltman

iTrader: (11)

Sorrry if its been asked b4, but I searched and cant find anything. Anyone know if and engine with vq35HR cams can run with the vq35DE VTC cam gears?And if so, Would it need an HR ecu, or will a DE ecu work also? I think that the DE and HR cams are opposite as far as timing goes, the HR is like the vq30de.

SurraTT

iTrader: (59)

The older intake cam gears have 40 degrees of travel, the HR style have 50. So if you are running 3.5 timing get the HR style. IMO


I beleive they are similar, but with the IVT solenoid in a different location there might be some cam gear differences.

Maximeltman

iTrader: (11)

So in short, If I used HR style cam gears, then I would need different main caps/timing covers due to the solenoids?

Crusher103

iTrader: (10)

wait, your using HR cams in a car with 3.5 timing?

SurraTT

iTrader: (59)

Well if your using HR cams with 3.5 timing your bigger issue is the cam sensor.





If so thats pretty much a 09 swap, using HR heads would need a 09 lower, then a 09 upper intake. and also would need a 09 timing cover, or a 07 altima if no EVT wanted.

Crusher103

iTrader: (10)

Yea, unless he is using 3.0 timing.....i dont think this will work.

Crusher103

iTrader: (10)

Unless what he is asking is there a difference between where the CPS sensor reads. The answer is no with 3.0 timing because the CPS reads off the cam gear not the end of the camshaft.

Do you have pics of your setup? Because this question is making me think what you did is put the cam spacers on then reused all the VQ35 timing stuff which is wrong.

Maximeltman

iTrader: (11)

Yes, that's how I received the swap-ready motor. Freight company dropped my engine. I did a leakdown and wasn't satisfied with high fluctuation in the test results, so I started to tear it apart, and it had the 3.5 secondary cam gears, and 3.0 main gears/timing chain which I was told is probably fine, just not as precise as the 3.0 secondaries w/spacers. I need to get some 3.0 secondaries now. That's if I just reuse the 3.0 ECU, though. It's a 99 ECU, and I read about mad codes with it, so I either want a 95-97 5speed ecu, or I want to know if I can just go with VTC and a 6gen ECU. I have HR cams and I already have a 3.5 timing cover and now I find out I have secondary gears and chains, so I'm contemplating getting DE or HR main cam gears and using a 3.5 ecu so it can have VTC also.
It's probably a bad idea. Just asking about what you guys think.

Maximeltman

iTrader: (11)

What you think I will need to run in a 99? I can get DE intake gears pretty cheap, no exhaust gears tho.





I just wondering, about how much extra HP/TQ would I be missing without the VTC on intake and exhaust? (BALLPARK)
I read in your thread about how with the variable exhaust timing really had graet gains over without variable exhaust timing.
I know that simply keeping the VTC variable out the whole equation and just use 3.0 timing with a tune is a bit easier, but as they say when in rome..