Do I need anything other than ARP rod bolts?

 

Using SR20DEN's engine as an example, nope.

 

I would install stronger valvesprings with that...

 

Call me chickensh*t but I wouldn't rev a VQ35 with only ARP rod bolts higher than 7200. Hell I'd probably stick to 7000. I like to keep my engines for a long time.

Honestly I don't think the NA VQ aftermarket is advanced enough as of yet to be sure of anything reguarding the VQ35's revability. There are just too many conflicting opinions.

 

Exactly how high does SR20DEN rev? That's one thing, in all the times I've talked to him, I haven't asked him about.

 

7500 RPM.....

 

The VQ35 could survive a long time with some limited forays into the 7500 and above territory with arp rod bolts. But I would try to limit it to >7200rpm. The VQ35 doesn't make power at 7500rpm anyways.

http://forums.maxima.org/showthread....l+shift+points

According to this, 7000rpm in 1st gear is the optimal shift point.

2->3 - 6500rpm
3->4 - 6500rpm
4->5 - 6000rpm

 

I've just done 7350 on mine coming back home from a meet. Somehow with a 3.5 swap, I can rev to 6800 rpms on stock ECU and 7300-7400 rpms with JWT ecu. It doesn't sound bad at all. Kinda strained out for air, though.

I have ARP rod bolts, ARP crankcase bolts, and JWT Valvesprings. I feel pretty good at high rpms. Not as much power as I expected; maybe because my Mevi isn't working right now. But I'll bet seeing 7500 is no problems when I get EU installed.

 

Yeah...the JWT valve springs and shims plus ARP Rod bolts is the safe way to go above 7200 RPM's. But there is a lot of controversy with the power you make. I think you will be different since you have the MEVI up there. I wanted to do the valve springs and shims but I heard that their are special tools required for that kind of install.

 

Dude....in like 2 months i'm goin be getting my heads built. You wont have to go as far as i am goin to but wit mild head work u will see 7300-7500 all day and make power...

 

Just get the new VQ35HR and be done.

http://www.autoblog.com/2006/08/23/m...-vq-series-v6/

 

I won't have a stock IM. I will also be using the JWT knock off cams.

 

Those shift points are for a stock maxima. Furthermore, SR20 IS making power that high thanks to VTC and his intake mods.

 

According to the 96sleeper's dyno you won't be making a ton of power past 7000 RPM despite the cams and modified intake manifold.

 

The heads aren't the bottleneck..........

 

Krismax revved his vq35 to 8k. I personally tried it in his car. His engine still runs, and i believe he just ran a 13.1

 

Doesn't VTC have zero advance at >6000rpm? With the 3.5 swaps that most are doing, there's 8* of advance. So wouldn't these 3.5 swaps with the 3.0 ECU have better top end power?

 

Nope. VTC offers increased breathing at damn near every RPM. As revs rise the A33B ECU RETARDS the intake timing to enhance top end power by allowing the intake valves to stay open longer to take advantage of the inertia of the intake charge. It reaches full retard at 6200 RPM. http://forums.maxima.org/showpost.ph...3&postcount=33

There's 7.5* of advance relative to full retard according to stephen max.

 

Not open longer... that would imply a different duration/cam profile.... just later in the stroke...

Sorry, just being picky, I know what you meant but for the sake of clarity for whoever else might read this...

 

Ah nice catch. I should've been more clear.

 

The VQ35 valve train is lighter than the VQ30. A stock VQ35 can rev to 7000 and a VQ35 with ARP rod bolts can rev to 7500. With more aggressive cams then valve springs might be necessary.

It is very possible to have enough power up top to need to shift that high.

 

The tach is off. I could go to 6800 with a stock ECU but 6800 on the tach is actually 6500.

 

Sounds like the underpants gnomes calibrated your tach.

 

My tach was off too with my stock ECU. With my stock ECU I could go to ~6800 on the tach, but we all know it was 6500. With a JWT it stops right at 7200.

 

Could be off like you said. But before the swap, it was totally accurate on 3.0's at 6500 and 7235 on jwt ecu. but with 3.5 swap, I get to take it higher by 300rpms. If it's off, then what could have cause this? Could it be that the sensors that are working together have given an offset? This is interesting to find out. I wonder how will EU do for my setup, since my sensors could have some offset.

 

Seriously though. Our tachs suck. I bet if you were to connect an aftermarket 6" tach like the ricers do, it would show the revs accurately. Another way (free) to test it would be to use the battery/alternator tester at autozone. They digitally display the revs through inductance.

 

Hahaha, waste of space for this thread, but funny and to the point.

I was happy about the new rev limit, but now that I am told it's just a BoBo, feel a little s*itty. Back to the topic, Nismology made it very clear to me the avantage of VTC. I feel like I need to have it for my car. But my swap has its limits, bummers.

 

All in all...even though 95% of the swaps chose to remove the VTC, in the long run we are still making a hell of a lot more power then we did with the VQ30. And with the addition of cams, we can pick up the top end power back as if we had VTC's. We just lose out on the low end which isn't necessarily a bad thing when we have traction issues anyway. Just my opinion.

 

My digital RPM switch displays my RPMs. I get an accurate reading all the way up to 6500 though The only time it's ever been inaccurate has been of late with my rough idle when the car is cold (RPMs on the tach will dip to what seems like 200, RPM switch shows more like 500).

 

Yep. And I doubt we're losing much top end. Look at the trap speeds of VQ35 swapped 4th gens. I basically had a 3.5 with H/E/I and no tuning, and I was trapping 104-105 mph all day long at 3100 lbs with me and the gas. Perfectly normal considering the weight and mods.

 

We haven't seen full 3.5 swapped 4th gen 1/4 mile times at a similar race weight yet so let's save these thoughts for then...

 

Then the full 3.5 swapped car can get cams too and not have that huge lowend loss associated with aftermarket cams and make more power almost everywhere compared to a hybrid 3.5 swap. I see where you're coming from because retaining them isn't easy or cheap by any means, but the advantage of VTC should not be downplayed even if most swaps have to give them up.

 

arent the full 3.5 swapped cars running e-gas, which means the throttle body only opens up around 80% or so at WOT?

VTC's do give more power, as they're designed to do, but considering it's damn near impossible for some of us to do the wiring and find the ECU and full harness for the 3.5, it's impractical. I'll take the power loss, and just compensate with a good tune. The only two people who have done the full 3.5 haven't gone to the track, so I don't know what those cars are capable of. I strongly doubt it's leaps and bounds above anything a hybrid vq35 can do.

I hope they prove me wrong though.

 

http://forums.maxima.org/showpost.ph...0&postcount=47

I understand completely this line of thinking.

 

That's weird. My only explanation would be the throttle closes at the same voltage, for different rpm's. At least that makes some sense. The only other way wouldbe to hook up another egas tb, and see if it is truly open all the way.

There are too many electronic systems at play here, at least we dont have it as bad as some, Range rovers have electronic e-brake, and the wires get corroded easily.

 

Based on that post, the myth been debunked IMO. TPS output voltage is TPS output voltage.