What was the mileage on the cars? Any insight on this rumor? I heard that when Nissan introduced the 37HR some of the engine maps were not properly hm adjusted? So the A/F ratios were all over the place on some and it shows when some of them hit the dynos. True or Rumor?

 

Damn
I was REALLY trying NOT to mod the new car when it gets here.
Now imagine with Testpipes you get another 3-4whp 295ish...dang I need some parts now.

 

295 with hfc and exhaust.

add intake, plenum mod, pulley, and tune= 325whp???

That seems in line % wise with the gains seen on the 350.

That car with 325 whp would be so fun.

 

Well, it depends on what you're comparing it to, right? In other words, how much lower than what? If you're trying to compare to DynoJet, from what I've been able to find by just doing a little research on the net, to convert a Dyno Dynamics reading to a DynoJet equivalent, multiplying by 1.18 gives you an approximate number. Emphasis on approximate. So 291.7 * 1.18 = 344.2 But if you're comparing to a Mustang Dyno, the multiplier wouldn't be that big, obviously.

I didn't take a vid of my own car's exhaust while it was still stock. But if you guys haven't seen it yet, Stillen has a clip that starts off with a recording of a stock exhaust, then they fade in with their exhaust for comparison purposes. Of course, their test car just has their cat-back on it, not the Berk HFCs, so mine sounds somewhat different. But this vid should at least provide you with an idea of the stock exhaust note.

http://www.youtube.com/watch?v=hNS-dJ4lvcY

The bone stock car had just a tad over 1200 miles. Mine was just shy of 1500 miles. I haven't heard that rumor, personally.

 

Wow, if that blue Z's a ringer I want it....now! Let's see, rims and just a few other simple mods....I could terrorize the neighborhood.
Gary

 

Is the G37 yielding similar results? I would have to assume so.

 

Suprisingly...no. The G37's we done with exhaust HFC/Test Pipes, and intake are all around 270-280whp range.

 

Isn't that a false statement? Isn't the 370HR a bored out 350HR. Granted still better, but still a HR? Or am I wrong?

 

^^ your wrong. Same block different heads. So its related, but no so much the same.

 

My DE engine makes me want to cry

 

I was more being picky with the verbiage, not the actual engine. Meaning it should read:
VHR > HR > DE, but everyone gets the idea I'm just being dumb, sorry.

 

So how does that work since its the same engine? What is different between the 2? Obviously their sizes/weights are different but that shouldn't affect the power the engine creates. Just their speed and ability on a track. Is there something I'm not considering?

 

Impressive. That white one would look soooooo nice next to my Dolphin Grey Audi

 

interesting, that would be awesome if the 370z is a platform with potential and not all maxed out like the 350z...

 

Good question. Is the gearing substantially different, maybe? If we start off with two near-identical engines but get different results at the wheels, then I'd think there are some differences somewhere in the drivetrain. In any case, I think we need to wait for some more people to try this setup and dyno their results so that we can compare. Right now, we have a sample size of just 1, and we need more data from a larger sample size. For all I know, maybe I really did luck out and ended up with a factory ringer.

 

nice gains and sounds great!

 

Good question, and this is the reason for my shock at these results. Then engines are mechanically identical, but the power ratings are ever so slightly different. The other thing to keep in mind, is that I never baselined the blue car in question, so I have no idea what it's bone stock numbers were.

 

It also makes baby Jesus cry.

 

wow if I was one of those guys with a DE engine, I would trade it in for the 370 in a heartbeat..but I have my HR, and I think it's still relatively competitive..

but damn those are impressive gains from just an exhaust upgrade..

 

lol ur not being dumb , ur right. the vhr is just a strocked version of the hr with diff heads and of course tune. im sure soon someone will have a hr to vhr upgrade available. get heads which go new from nissan for about 500 each stroke it out to personally i would do 3.8 because it has a nicer ring to it imo and performace of course. u would need a harness to control the VVEL sensors and actuators but the they both share the same ECU extrernal connectors its just that the ROM files are different