Nissan 370Z Forum - '09 370z Tuned with EcuTek by Ptuning with numbers

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- - '09 370z Tuned with EcuTek by Ptuning with numbers (http://www.the370z.com/tuning/105998-09-370z-tuned-ecutek-ptuning-numbers.html)

Quote:

Originally Posted by Mozen (Post 3268730)

Who knows, perhaps it would.... However I'm near the limit of things to do and you hit that wall of diminishing returns. Only way to know would be to buy some lth and test at this point but....not in my build plan sorry.

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I understand that. Not knocking your build at all and I can agree with you on diminishing returns.

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Quote:

Originally Posted by Mozen (Post 3268470)

Still disagree but... your welcome to your opinion.With the BP kit Ill be able to keep exhaust and the headers, Ill have to sell off the CAI and the HFCs. Everything else supports the progression. :driving:

you're* :tiphat: lol
of course man, everyone has an opinion. it's what makes the world go around. you also had your car for awhile so it plays out in your favor. looking forward to the boost build :) :yum:

Quote:

Originally Posted by sixspeeddemon (Post 3268722)

I'm not disagreeing with anyone but I think some of you are thinking of just bolt on and going. I was saying with the combo of LTH and retune should net about 10whp. And I also said every car is different but honestly if it in all seriousness made 2-4whp why would someone spend 900-1500 for LTH plus install if they can't do it themselves for 4whp. LTH 99.9% outperform shorty any day. I agree with the bolt on might gain 5whp with a retune i don't see why it wouldn't or why it couldn't pick up 10whp over the hfc. On my civic I had i had LTH with Hfc when I switched to a better flowing LTH without cats my car gained 7whp without tuned and another 4whp with a tune. So it possible it's really all in the tune. I do agree that when it comes to NA build its harder to make big whp gains after the basic bolt ons are there but people tend to figure that the flow rate of you intake and exhaust systems plays a huge roll on power the better the flow the better. But I'm glad we have a better tuning software now as well that alone can help make power by itself

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because it's a 370z, it's hard to get a big gain out of it like that. i think switching to e85 can get you about 10whp or so i've heard.

I may not have as many mods as you but I do have the FI LTH CBE and stillen gen 3s and I made 314whp... just saying

Quote:

Originally Posted by sixspeeddemon (Post 3268722)

I think you're tossing around apples and oranges.

I had a b20 vtec, ITB'd civic myself in the past, and a small change, retune, or better bolt on absolutely delivered a measurable difference in whp.

The VQ is not that animal. Its not a B or K series, its not an LS, its not a coyote 5.0

The VQ in these cars is already towards the end of its efficiency, and they absolutely see diminishing returns with bolt ons. I would personally never even bother getting headers for this car, short or LT. It's not personally worthwhile for the cost for the return. I'm aware that most of the header products available are "off the shelf" and not a completely custom, refined for 15 years piece like a Hytech, or RMR or whatever is out there for other platforms. Sure a shop like a Hytech could slave over a set of headers to extract every drop of HP out of the VQ, but they would retail for an enormous amount of money when they were done.

Agree with Nick , here.

The VQ has been refinded from the factory, You get some WHP out of bolt ons and tune, but one thing I wouldnt invest in is headers, The PIA of install, cost of them, and added noise ( Long tubes) isnt worth it, Ex my buddy is fully bolted and tuned and he made 316 WHP ( 370 Z 6 spd) on a high? Dyno. I made 302 WHP on a "low" dyno and I have a auto AWD sedan, I'm would bet you strap his car to my dyno and we'll make very close numbers and for 5-6 WHP the headers are worth the $800 they cost + install :/ Just my .02

Please... If you can open up a DE, you can open up a VHR. In this case if the high flow cats and crappy stillen headers were replaced with FI LTH plus a retune there would absoluty be gains. Nothing insane, but about 8-10rwhp is very feasible. This motor is not tapped out from the factory, but what are you expecting here? Cam gains on a pushrod?? No... Motordyne is also working on a lth... You dont think gains will be made there... A couple years ago 315-320 was the norm this motor made FB....Fast forward, im seeing 325-330. This motor imho will be close to its limits na around 340-350 with its heads and considering they dyno stock around 280,... Even being at 330rwhp is a 50rwhp gain. Again. Far from tapped out

And to the comment about this not being a coyote 5.0 motor, my 13 5.0 made 382 rwhp bonestock and after full bolts and tune i managed to squeeze out 430rwhp and thats without tearing into the motor of doing cams or heads... Very on par with FBO gains from VHR.

Quote:

Originally Posted by James10694 (Post 3270053)

I may not have as many mods as you but I do have the FI LTH CBE and stillen gen 3s and I made 314whp... just saying

What dyno? Any corrections? And what local temp/humidity

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Either way, only way to solve this is to so back to back testing with someone's car at this level and see. If be game if ppl want to pay for it? Lol

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Those are solid results Dreamer but i think the general question or dispute is over gains when the car is near maxed out for add ons. When i first saw those i really wanted to get LTH, then i got that deal on the headers and cats and here we are. FI makes great stuff tho and if i cant fabricate a way to keep my exhaust with the turbo system next year ill be getting an exhaust from them.

Quote:

Originally Posted by Mozen (Post 3270349)

Any exhaust can be modified to fit the turbo setup (probably just have to cut the DP to Exhaust connection & modify). Which kit are you looking at?

Quote:

Originally Posted by theDreamer (Post 3270362)

Any exhaust can be modified to fit the turbo setup (probably just have to cut the DP to Exhaust connection & modify). Which kit are you looking at?

the BP kit, i saw a photo with the Motordyne exhaust hooked up but then later read it hooked to FI. idk, i can sorta weld(still learning and will practice more) and have the equipment. Was going to talk to Sasha when i dropped the money on his kit and see if he had a solution or if id need to fabricate.

Excellent post dreamer

Quote:

Originally Posted by Mozen (Post 3270364)

I think Jwick here in Houston was on a different exhaust for awhile but switched to F.I. for the 3" option.

Quote:

Originally Posted by GZ3 (Post 3270366)

Excellent post dreamer

Mozen is correct though, curious to see results with key changes when going full tilt on bolt ons, but with out motors it is tight to really push farther & farther and be reasonable about cost when for equal you can add boost and have all the power you want (which is what I ended up doing).