So the head and valvetrain have me intriqued in how the VQ37 is going to handle boost. Not so much in terms of how much power the motor can support but how can the infinitely adjustable intake "cam" and someone like Technosquare or JWT using that to their advantage when tuning a VQ37 turbo setup.

 

Thoughts, comments, suggestions?

The head has a lot of stuff going for it.  Generous quench area, and a shallow included angle make the combustion chamber resistant to detonation.  The head has improved cooling around the hot spark plug and a small spark plug that is well cooled.  All of these issues help the engine resist detonation.

The engine does have 11:1 compression.  Not the greatest for turbocharging but it will proably be able to tolerate low boost..  Other 11:1 engines have been turboed with low boost with sucess.

Do we know the specs on the internals as far as composition go? The wall thickness of the wrist pin I'm curious about as well as how tall the piston is from the bottom of the skirt to the bottom of the third ring land. Having 11.1 compression isn't too much of an issue as long as you have it well tuned and have some sort of suppressant to help aid against detonation...IE..methanol injection etc etc. I'd like to know if anyone has any detailed information regarding all the internals of this new VQ engine. I'm looking at developing some new parts for the newer Nissan classes of engines and this I feel would be a great head start in the realm of modifications.

I have looked at the parts but havent measured them. If you have seen the VQ35HR, it is pretty close to that.

Well thats the thing. I primarily work on the VGs. I'd like to dive into the new VQ power plant but i don't see many going outside the box on machining and engine building with these new engines. I wish I could find a blown engine to do some development work on.

What sort of stuff did you have in mind?

oil pans, windage kits, oil pumps...things along those lines.

The VQ's do have high g oiling problems.

Posted By wes on 25 May 2009 06:02 PM

So the head and valvetrain have me intriqued in how the VQ37 is going to handle boost. Not so much in terms of how much power the motor can support but how can the infinitely adjustable intake "cam" and someone like Technosquare or JWT using that to their advantage when tuning a VQ37 turbo setup.

 

Thoughts, comments, suggestions?

Keep an eye out for new products coming out this year... some include exhaust cams, throttle bodies, intake manifolds, etc. I think there are two companies working on some exhaust camshaft designs and one company working on an intake manifold.

Tuning the ecu will be the most time consuming & expensive R&D project for most tuner shops & manufacturers. Nissan did a pretty good job at making things complicated.

I think the average street Z34 (tuned for reliability, weather conditions, pump gas) w/ forced induction, low / reliable boost settings, mild upgrades, should do between 420whp-480whp. *This can vary depending on the dyno. I've already seen a 30whp variance between 4 dynos in the last 2 months. 3 dyno jets & 1 superflow.

changing the throttle body isnt going to change anything... once the engine is warmed up the throttle is open 50% during cruising then WOT when accelerating. closed at idle... but not like the other VQ closed... just enough to create vacuum... the engine controls the amount of air entering the engine with the intake valves. it really dosent need throttle plates after it is warmed up other than create vacuum for EVAP and brake booster. The intake cam can vary from 2mm of lift to 11mm of lift depending on load