can you elaborate on the fuel line problem?
i am running the fuel pump that came with the kit, did all the mods to the housing and i am not having trouble with fuelling apart from it running a tad lean near redline (which i remedied by lowering the redline from 7500 to 6750)

Are you talking about the line that connects the hardline to the rails?

Hi niko86, Im curious. Stillen told me the headers would cause a boost loss and lean AFR whereas HFCs would not take the elevated temps.
I still have my Berk HFCs in the box (purchased them recently). I loved the idea of better flow, an extra O2 wideband bung (coz i wanna get an AFR gauge too) and spiced up exhaust note. But now I'm tempted to return them to Z1 Motorsports because of Stillen's advise. I was wondering how your Berks affect your kit. If it's really the temerature stress I guess you wont be able to tell yet since your kit is still faily new. Well, good luck with it i hope they last you long.:tiphat:

sure, metallic catalyic converters will break sooner than ceramic ones, but that's more of a maintenance issue than a performance one i think

I built a couple of turbocharged cars and still do, i have always used metallic HFC type cats, and the only downside is that you will eventually burn out these cats and need to replace them.

if things go really bad you might have excessive back pressure from a deformed metallic cat in your exhaust thats clogging it up.

What i do on my other cars is just checking on the cats whenever i do an oil change, that's easy enough, does not take long at all, if needs be, i just replace them.

Generally with forced induction you want to reduce back pressure, i am not sure what the deal is with the vortech V3 unit, maybe it's not capable of pumping enough air if the back pressure decreases too much.

So basically it is not a problem the HFCs are introducing into the system, but rather the heat will be higher because of the forced induction, which will shorten the live of your HFCs

Thanks, that explains it well.

What radiator are you having in your mind? I was looking at the Mishimoto, 4cm core thickness. I just hope a thicker core fits with the SC kit.

CSF. Mishimoto is awful Chinese garbage.

:iagree:

Friends don't let friends put Mishimoto crap on their cars:tup:

Always thought Mishimoto is Japanese :rolleyes:
Well, I got the Mishimoto Weighted Shift Knob (363 gramms), which I totally love. Even the Nismo stick doesn't touch this. Perhaps my fav mod on my Z :rofl2: (kidding)

Either way, I will look into the CSF. ;-)
Oh and exactly which larger heat exchanger did you pick? You were saying Frozen Boost. Is it Type 114 or 117? Thanks

That's why they named it that way. They want you to think it's Japanese.

Check your fuel pump assembly to see if the fuel pump is floating or secured like it's supposed to be. Also look to see if the fuel line is cut. Not much more I can elaborate than that.

Diego, did you experience the power loss on HFCs with the Stillen base tune or did u run a custom tune and still lost power over stock cats?

Why could we not of talked about all the problem that can occur with headers and high flow cats 2 years ago? Well I guess I am ok since I have not had any problems since I have upgraded. I am curious if I change out my cats back to stock would I make more power?

I'm getting so sick and tired of the damn tps codes and limp mode! Happened again today and it pisses me off something fierce! I love the stillen kit and have nothing but good experiences with stillen but this has to stop. I've tried just about all the normal suggestions associated with this problem to no avail. Nothing seems to help and when I took it to r/t tuning a couple months back of course the problem wouldn't replicate on the dyno or on their test ride so there was nothing they could do for me

Did you have the MAP range extended?

I'm not exactly sure what you mean but I got a custom tune from r/t tuning so if that's something that a highly reputable tuner would do than I would say yes

No, not all highly reputable tuners would do all the time. My shop missed it and they are very good. Just have to either extend the map range or disable a setting.

Nobody is perfect. I would rather have a small fixable issue versus a catostrophic failure.

oh nice you've had no problems for 2 years with Stillen headers and HFC?:tup:
I guess u have a good custom tune? What HFCs you using?

I'm curious, wouldn't the Stillen base tune have included this tweak already? Unless, one would custom tune from scratch, that is. I'm asking coz I wanna custom tune "on top of " their (unlocked) base tune.
And anybody know why does our Z have a MAP when it uses MAF to meter air?

The Stillen tune is locked so you can not start with their tune as a base.


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My god man PLEASE tell me your not on their tune ! An I have no clue if their base tune has that tweek, I ran their tune for 1.5 days and then went custom tune. I had zero plans on driving the car on their tune. The can tune is HORRIABLE, I have said it before and will say it again I made a WHOPPING 42 WHP with the SC and their tune, Custom tune netted me 112 WHP gain.

Yea what he said! Vince over at r/t tuning got me 50 more at the wheel over the can tune. Sure it negates the warranty but I personally felt it was worth it

Sure one can, and I'm going to. :driving:
I'll use their base tune as a starting point for custom tune rather than have it tuned from scratch. I gotta be able to drive on the base tune to the tuner since I shall install the kit at home.
Stillen told me already they can provide me with a base tune plus tuning cable ($200).

Yea but their tune is still locked, When I had mine done I drove to the tune on the can tune like you and my tuner loaded a 370Z Stillen kit tune to my car for a starting point.

Ah yes u are right. I didn't notice the unlocking option is only available to outside US customers.

Cheers

Well dropped the car off at Stillen and now we play the waiting game
I guess they are super busy and wont see the car till a few weeks

Man cant believe you have to wait that long, no other tuners in CA?

Dont want to deal with voiding warranty especially since they are the ones that installed and tuned , i hope its just the tune thats giving the car problems and not something else

From what i heard mid November , hopefully they can squeeze it in and check it out even bit by bit on days they arent that busy so i can get the car back sooner
Sucks for me but what ya gonna do as I already paid so i feel my car its not a priority :bs:

The STILLEN Tunes have been reworked and are now regionally done so most customers have been getting good power out of it. There are still variants with each ECU and car that make it unable to be 100% ideal for every car without dyno tuning.

Every customer is a priority. We have customers who have not paid waiting until mid November to have work done. We are simply very booked up and are working as fast as we can while maintaining quality work. I will stay on top of it and try and get your Z back to you as quickly as possible.

OK so Mark at Stillen was able to get my car looked at and worked on faster than what they originally told me
I guess the car rejected some parts of the tune and it also needed a different radiator cap
Man oh man does the car feel different ,right off the bat the low RPM felt way better and the car pulls all the way thru and the car idles better
Thanks again Mark

Glad to hear you were taken care of :tup:

Nice man ! Glad she's back on the road again .

So will i have issues going with the stillen sc kit if i have test pipes? even with the new tunes?

Mark at Stillen told me to leave my cats on the car or I would be down HP. He would be the man to ask if it causes any other problems.


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Thanks Jason.

You will not have issues with the Supercharger if you have test pipes. We have a lot of customers who have decided to use test pipes or been sold on them from their shop. Because of the way the valve overlap works on the VQ37 you lose some of the boost in the cylinders without the back pressure of the cats. Yes, the test pipes flow better, but because you have less boost in your cylinders, you make less power.

Hey Mark, can you show us an example of this power loss? Same car, same day, difference being with/without cats?

My car with the Stillen S/C made a little more power using Test Pipes. Best thing was less heat too!

Lemme guess, more power with less PSI?

Was a big 3Hp! :roflpuke2:

Since when does less boost equal less power!? That's not how it works.

But less boost pressure? (That's safer)

OK, all jokes aside I love this kit for my Auto Z, that's why I went this route. But let's be honest this kit is very prone to heat soak. With Hp swings from 30+hp to 30-hp real quick. That's why the Frozen Boost Intercoller is a must to help keep intake manifold temps in check! Lets take five pulls for example with Cats on and then five with Test Pipes on and you will see more consistent HP with the Test Pipes. I use the 9lb pulley and Test Pipes with my set up and see almost 10PSI. The heat the Cats give me, I gave into the Test Pipes equalling in less heat and more consistent HP even thought I might have gaven up a little PSI. At the end of the Day it's not always PSI that will get you to the finished line, but to keep the heat in check with consisted numbers that will win the race! Again at the end of the Day with less heat, the Test Pipes proved more consistent HP for my driveability. :tiphat: