NA: 342/275. Anyone higher?

Jordo!

I haven't followed every post here, but I it seems as though there is still debate over the value of having access to the VVEL maps.

Here's a simple way to determine their value empirically.

Re-load the previous tune where fuel and timing was optimized for Mike's set-up using stock VVEL mapping. Fine tune as needed -- leave VVEL alone. dyno three runs. Take the best.

Then load the tune with optimized fuel, spark , and VVEL tuning. Fine tune as needed on all relevant maps. Take three dyno runs and report the best.

Compare and contrast -- question answered.

If Mike makes another 10-12 whp (or more) at points throughout the rev range when adjusting all three parameters together as opposed to just two, clearly having access to the VVEL maps is helpful for extracting maximum power.

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John@Z1

I tuned the vehicle and I'm telling all of you this power was not gained in VVEL tuning alone. And yes VVEL is helpful but(I seem to have to say this next part a lot) please don't think this is in VVEL tuning alone. Mike has pretty much shared his mods with everyone. There is no need to perform the runs you just mentioned as the VVEL tuning we performed did not net very high numbers(but hey, don't take my word for it I only tuned the car).

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Jordo!

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...

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Mike

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.

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gaveup

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.

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SPOHN

There's no real secert to this. Forget all the VVEL talk. It's was just talk. The headers themselves make most of the raw HP. But like any other tune there is a little more that can be brought out.

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