I will obviously lose my VTC when I use 3.0 timing equipment and the 3.0 ecu. But if I run VAFC2, I will be able to retain the 3.5's variable intake functionality, correct?

I am thinking its similar to the 00VI, however I have not seen anyone mention using a vtec controller/rpm switch type thing in the "list of members who have done a 3.5 swap". I guess the alternative is to do the SSIM mod if I don't retain the VIAS? I plan on running some form of engine management such as emanage ultimate or SAFC/VAFC2 with a professional tune, but I will be using my 95 MT ECU.

Sorry if this may seem common sense but I am still planning my build and havent started tearing into anything yet. I just need some basic clarification. I have been looking at members builds that seem to be fairly successful.

 

It's been done before, but it's also been proven to show gains when you remove the VIAS entirely. This is why NWP sells block off plates for it.

http://forums.maxima.org/group-deals...ack-stock.html

 

Okay, I was just surprised that no one ever talks about retaining VIAS in my searching.

Thanks for the informative post. I will need to research more about the pros and cons of retaining that variable intake setup.

I would like to make atleast 220 whp when all is said and done with this swap after tune. I was looking at the ARP rod bolts and head studs and running a more aggressive cam and a better fuel system.

 

http://www.nissanclub.com/forums/eng...-vs-stock.html

^ this was just a couple threads down.



The blue line is with a stock manifold w/ functioning VIAS. The red line is w/ a deleted VIAS. Green is w/ SSIM. (gutted shelf)

Comparing stock vs. VIAS delete, the later makes power over stock from 3800rpm up to redline. This not only equals higher peak numbers, but more power in the area of the power band that you will be using for racing purposes. And in my opinion, even with the loss in hp/tq down below 3800rpm, the VQ35 still has more than enough grunt to break the tires loose down there, so the loss isnt noticed.

What are you tunning with? And are you planning on extending the rev limiter?

 

you'll make around 220hp with just a y-pipe, exhaust, vias delete and a safc2 tune

 

Sounds good, I saw a few dynos where people were getting sub 200 whp after swap, which I am definitely trying to avoid. Thanks for the clarification on the VIAS, I will be eliminating that after reading that the SSIM is potentially not worthwhile and that the 350z IM looks like a fair amount of fab work to put on.

I was planning on either emanage ultimate or safc2 for the tune, which I will have a shop handle for me. I read a few more threads and I will just do that block off plate strategy. I was going to run my 3.0 headers and warpspeed y pipe. I need to research what types of injectors to run, I have a walbro 255 that my friend will sell me for cheap. I was also looking into phenolic intake spacers, ARP head studs and rod bolts. I need to research what type of cam to run as well.

 

if your going with a stock rev limit and only looking to make 220hp, cams, rod and head bolts are over kill

oh yeah stock 3.5 injectors are fine

 

Good to hear! I should revise my goal even higher!!!

 

I would go with the emanage ultimate. You can advance timing with it, this gives good gains for an N/A setup. Whereas you can only tune AFR with the safc

 

Delete the VIAS.
Makes more power for sure.

 

Also the 02 VIAS is not just activated at a certain RPM its based off of other variables. I remember reading that it opens closes then opens up again. Nismology made a few posts about it years ago.

 

Exact. It stay open till 1800rpm, then close until 3800rpm and open again.
You'll need a msd 8969 rpm window swithc to make it work properly.
A good place I've found to hide the msd, is in the tray below the radio.

 

Just delete it, more power and you don't need to rig up a switch.

 

What about the SSIM...has anyone ACTUALY recorded gains from this.

 

Search the dyno forum it should be on the first page.

 

See for your self. There's a link to SSIM dynos in this thread!