Lets just get the remaining few sets of these headers sold and installed and see what the numbers say!

^ THERE IT IS... GLWS guys! :tiphat:

Obviously the gains are primarily due to other bolt-on mods -- particularly the headers... I don't think anyone here thought 30+ whp came just from valve timing adjustment on a NA car.

What I'm trying to determine is the approximate degree of improvement with this set-up achieved from tuning alone with the ability to ALSO tune VVEL.

Can you give us more detail on that. For example, by how much were you able to increase max lift? Are there limits built into the new software (or constrained by the ECU) to prevent causing physical damage?

I'm not questioning your word -- I'm seeking more detailed information regarding the new tuning parameter...

Keeping it simple I just like the fact of a mod that produces great power and weight savings

I would suggest you call Z1 and talk to Jon directly. I can't say for sure, but I know if I was the tuner, I wouldn't post what I had done for public consumption. There are too many shops that steal and copy other peoples actual products and certainly intellectual property too.

^^ Fair enough... but I was really only looking for general info, not actual maps or specific values on anything...

More like, "we added more overlap lower in the rev range to build torque and raised lift by several degrees over the OEM tune approaching redline..." and "yes -- if you go to far, the ECU will set a CEL, so you can't accidentally hit the pistons with the valves from the tune alone" or whatever they did/discovered. (obviously I am just speculating on all of that -- none of that may be accurate).

The specific settings in anyone's map will vary from set up to set up and need to be empirically determined on a dyno anyway.

I mean no harm -- I just crave knowledge :p

Actually -- just knowing when uprev will make these maps available to end users would be great! Anyone know?

I agree that it's probably advantageous to Z1 to keep their findings however small or large they are to themselves since not many tuners have had a chance to delve into this yet.

John@Z1, i don't think it is divulging too much information, but would it be possible for you to answer my previous post.

do you have the temps for the 273rwhp?

No, that was dynoed long ago. We will perform a before run on tuning and document the runs as other changes are made.

Congrats Mike on some great numbers.
Any plans to do more engine work to see what else is left to be made N/A with the VQ37?

probably not. the only possibility is exhaust cams, maybe in a year. They would be close to 3000 installed though, with at least 20 hours of labor.

do it in the winter. : ) i'll swing by and we can tear it apart and do it!

:eek:
Daaaamn. Plus if you put in the exhaust cams you may want to do high compression pistons and other upgrades since you are tearing the engine down so much. I am really curious if the engine can reach the possible 400whp mark N/A, I know years ago it was discussed in length on the forum if possible.

And at that point, I'm probably just better off doing an LS swap, which is my ultimate plan if this engine ever blows.

MTI has a 700hp LS crate motor... :yum:

I thought I read in a post here yesterday that z1 is making a version of these for the 370z. I can't find it now for some reason

Z1, is that right? If yes then when will they be available?

LS7....:driving:

Just over 500hp on an engine dyno has been made by a DE engine, so 400whp should certainly be obtainable by a VHR. RPM is the ticket... The DE has to have a dry sump to spin that high, as the oil pump is a time bomb over 7000 track, 7500 street. If the VHR oil pump can handle 9000rpm (which is hard to chew... not many factory pumps can), and if the VVEL can handle that, I think it could see 400whp with a pretty basic build.

I mean... mike's dyno graph there is peaking at 7200.... thats pretty damn low to be making so much HP/L. There is clearly so much more to be made as the community takes more steps. It might take a while before someone gets to 400, but I think it will happen.

^ that would be very nice accomplishment. Something I wouldn't mind trying one day. But it's hard to make such a jump when it's not guarrented on a built NA motor. But I really feel it could be done with bored and stroked motor end cams. Course there's always the cooling issue we have at hand. Or at least with tracked cars.

Would these headers work on the Boosted Performance turbo kit?

I don't believe so, since you cannot use VQ37 cats/TP's with these headers.

Yeah thats what i was thinking... Maybe they will work if Z1 makes some specifically for the VQ37. Those header welds along with Sasha's Turbo Kit welds.... :yum::yum::yum::yum:

Mike I'm going to beat you by .5hp. Hehe

Trollolololol :roflpuke2:

im just saying, with those jun cams, new valve springs/retainers, & head work we are looking at a possible 360whp na

Id like to see ITB on our car.

exactly! i wish someone would offer one already. these things would scream like a banshee with itb's

I love ITB

John, I'm not sure how to post pictures on here but there are pictures if you go to the Forced Induction thread and click on the Boosted Perofrmance thread. That kit does delete the cats/test pipes, so the stock or after market headers bolt up to exactly where the stock cats would be up to the turbo kit. If you could look into that for me that would be great. Thanks

They work best with a tuned plenum... thus concealing them.

I don't see how you could get ITB's on this car without ditching VVEL (and possibly DBW) anyway.

Awesome gains and set up Mike ! How about an ignition amplifier ? I don't think anyone has actually tried one yet.

See if Sasha is willing to weld DE flanges to his kit.

No.. ITB and A2M..

Wow! Great job and Impressive gains...
Any other shorty headers come close to this?

Im sure you could have a shop cut off the flanges and weld DE ones on to mate with the headers

That's a good point, but from a consumer (mine) standpoint it sucks. Because what they are doing tune-wise at Z1, benefits me about none in South Florida, or almost anywhere that isn't within a reasonable driving distance.

Sure, there are always email tunes (and I am a huge fan of those), but you'll find most people don't like going that route. So if a shop 600-1000 miles away from Z1 offers tuning that is comparable, I don't see that taking a huge chunk (if any) of their customer base as the majority of the people they tune will be "local" to them.

Coming from a WRX, the idea of people not sharing setups or tuning information on this forum and other Z sites was a hard pill for me to swallow. You can log on to any WRX/STI forum right now, post your map/logs and have professional/knowledgeable tuners offer advice how how and where to clean it up. Make the change, log it and upload your results and the same people will have absolutely NO problems offering their help.