I'm looking into some tuning options, and I have narrowed it down to either 1. A used Cobb AccessPort, or 2. A Hypertech programmer. I have decided that with my long-term modding plans, the cost of an Osiris tune isn't worth it.

I have had prior experiences with Cobb (my last car was a Legacy GT), and I like the monitoring and logging abilities it has. It can also keep track of fuel economy and other cool things. I don't know any specific numbers as far as gains go. Unfortunately it's discontinued, so i'd have to find a used one.

The Hypertech has current support for it, but is limited to only 1 map AFAIK. It is dyno proven for around 8hp and a much smoother powerband.

Any thoughts here?

 

If I am correct, the cobb doesnt support the g35/350z app anymore.

Someone correct me on this.

I just got a tune from Uprev Osiris today. It was pretty good IMO. Put down 265whp and 237tq.

 

That's correct. They still have all their maps and info on their website, but they just aren't making any more updates or new APs.

 

I don't have any experience with Hypertech but I've used the Accessport, with full bolt-ons I've yielded 15+hp & 20tq in gains. Although I found the extra features of the accessport useful, an Osiris tune will be better for performance.

How much you getting the Cobb for?

 

Well I haven't found one...just trying to decide which to go for at this point. But i'd stay under $400 (since the APs brand new are $495, i'd say that's reasonable). An AP for an 07-09 still hasn't sold and he's asking $200 right now.

I haven't seen much in terms of gains from an Osiris tune, but from what I have read it's similar to the gains from the Hypertech and AP.

 

These are just a few of the N/A tunes that we've done on Infiniti's. The first one actually has a comparison of Base vs. Cobb vs. Osiris. I know the peak # is only 7hp greater, but look at the increase throughout the entire curve. That car is currently putting down 289hp after we switched headers and did some more fine tuning.

https://g35driver.com/forums/tuner-d...ed-osiris.html
https://g35driver.com/forums/tuner-d...-w-osiris.html
https://g35driver.com/forums/tuner-d...-w-osiris.html
https://g35driver.com/forums/tuner-d...-w-osiris.html
https://g35driver.com/forums/tuner-d...ipe-300hp.html
https://g35driver.com/forums/tuner-d...-w-osiris.html

 

Nice looking power curves. Especially nice to see that dip eliminated from the baseline and Cobb runs.

I think it's important to note, though, that we're comparing an "off-the-shelf" map to a custom (i'm assuming dyno) tune. In any case, a dyno/custom tune is going to produce better results than an OTS map (mainly due to specific modifications that perhaps weren't tuned for in the OTS map). But the AP is also capable of using custom maps as well.

I'm curious to know if the Cobb map makes any adjustments to the automatic transmission, such as shift points/firmness. It sounds like the Osiris tune does...is that correct?

 

No and probably not. There's rumors of Osiris possibly improving the shifting but it has not been proven yet.

See if there are any Uprev/Cobb authorized tuners in your area, since dyno tuning is the best way to go.

 

For sure. Cobb has/had a facility in Salt Lake City (about 40 mins away), so I imagine I would have a few options. But since I became fairly proficient at road tuning myself, I may start there first and see how it turns out.

IMO $350 for an AP plus my own tuning ability (or even $200 for a dyno tune) is cheaper than an Osiris tune.

 

Shifting does improve with a correct Osiris tune but the Transgo kit is the way to go for supper firm shifts.
Why not order the Osiris Tuner for $700. I know that it is more expensive than your other options, but you would be able to do so much more with it.
There have been so many before you that regret spending the money on other programers only to find out that they don't perform nor give you the options that Osiris does.
Remember, "cheaper is cheaper".

 

$700 is almost all of my "mod budget". So then the real question is which option is better? Both end up around $670...

1. Grounding kit + Z-tube + Osiris Standard Tune
or
2. Grounding kit + Z-tube + plenum spacer + Cobb/Hypertech (Cobb tuned by me)

I installed the grounding kit yesterday, and the Z-tube is on its way. Haven't ordered anything else yet.

 

And again, a dyno tune is always going to have better results than an OTS map. But when you consider $340 for a Hypertech vs $500 for an Osiris, think about what other things you could buy to get even more power. How much might you be missing from the Osiris tune? Maybe a couple HP. You can get far more than that by spending that extra $160 on something like a plenum spacer or something exhaust related.

 

Which plenum spacer are you going to get for $160? If it's not a MD Iso 5/16, then you will not realize the full potential of that mod. Is $700 all you're ever going to spend on your car? If so, you would be better off buying the $250 MD 5/16 and a set of $450 Berks HFC's. Those two mods will net you the same power gain as Hypertech, z-tube and cheap spacer.

BTW, as owner of a Nissan/Infiniti performance and tuning shop, I have seen it all when it comes to these vehicles. It would be just as easy for me to say "go for it, spend your money on worthless mods" then say "I told you so" after the fact, but I have a passion for these cars and our customers. When someone that is obviously new to the G game (judging by your # of posts), I want to offer the best advice possible so you don't make a bad investment when buying your mods.

 

Don't get me wrong...I really do appreciate your suggestions and feedback. This is what it's all about!

The CZP spacer is 159, and the MD is just a little more.

Yeah I don't think I will spend more than 700-ish on mods. I just sold all my Legacy GT aftermarket stuff for about 800, and I need to stay under that.

I really learned the value of a good tune from having custom tuned my LGT. Granted the results from a turbo motor are far greater than an NA motor, but that's why I have been diving so deep into this topic. And a properly tuned car gives you more power and fuel economy for those highway trips (specifically if your AFRs are tuned properly).

I am new to the G game, but certainly not to performance. Before my Stage 2 LGT I had a well modified Grand Am GT. But each engine reacts differently to different types of things.

 

I'm just concerned about running too lean and not taking advantage of mods (I.e. HFCs and spacer) without a tune. But maybe it's not as big a deal on these cars as I think it is.

So are you saying I would be better off without a tune and getting the HFCs instead of getting an AP with a custom road tune?