Nissan 370Z Forum
Page 26 of 99 « First 162425 26 27283676 Last »
Show 40 post(s) from this thread on one page

Nissan 370Z Forum (http://www.the370z.com/)
-   Forced Induction (http://www.the370z.com/forced-induction/)
-   -   Boosted Performance round 2 list (http://www.the370z.com/forced-induction/69496-boosted-performance-round-2-list.html)

jwick 01-28-2014 12:46 PM
Quote:
Originally Posted by m3chhawk (Post 2669700)
Sure, and I understand what you are going for, I'm just saying boost by speed isn't necessarily the correct way to go about it because the car builds so much torque, so quickly that you would have to limit everything below 100 MPH.

For reference I'm running 7.25 PSI wastegate pressure. You can theoretically run an EBC at double so on a stock block BP kit, you don't really want to run less than a 6PSI spring. Even at 6 PSI, you will need some sort of control, rather it be human or electronic. It can actually be managed pretty well with the throttle once you get used to the car. The kit has a great feel to it and the boost is very predictable.

My setup is far from ideal at the moment. Hankook V12s 305/30/19 at ~-2.5 degrees camber. The plan is to get a camber kit ordered and stuff some 335 RE-11's in there with as little camber as possible. But I'm definitely interested in any other suggestions.
What is your basis for not 'wanting' to run less than 6psi? You got some real data/reasoning to back that up?

My tuner is going to install my manual boost controller and requested that I install the minimum spring that comes with the WG and he'll adjust/tune from there to a level he feels comfortable with. Chuck33079 and I are in agreement that they minimum spring from the table Sasha posted in another thread was around 4.5psi. Is there an actual issue with running that low a spring or is that just your opinion?

My plan was to run that minimum spring for a few weeks, maybe a month or so, on the base map until my tuner can squeeze me in.

Maybe Sasha can chime in, will I have an issue with that?

m3chhawk 01-28-2014 12:55 PM
Quote:
Originally Posted by jwick (Post 2669724)
What is your basis for not 'wanting' to run less than 6psi? You got some real data/reasoning to back that up?
Depending on your setup/tune you are going to want somewhere between 11-12 PSI for full power. Your waste gate will always determine your minimum pressure. The boost controller will only let you run up to a 100% duty cycle. So for a 4.5 PSI wastegate spring, you would only be able to run 9 PSI max (100% duty cycle) whereas a 6 PSI wastegate spring you could run up to 12 PSI.

Ninja edit: Just realized you are going to run a manual boost controller. Disregard all of that ^ it doesn't apply to you.

jwick 01-28-2014 01:16 PM
Quote:
Originally Posted by m3chhawk (Post 2669733)
Depending on your setup/tune you are going to want somewhere between 11-12 PSI for full power. Your waste gate will always determine your minimum pressure. The boost controller will only let you run up to a 100% duty cycle. So for a 4.5 PSI wastegate spring, you would only be able to run 9 PSI max (100% duty cycle) whereas a 6 PSI wastegate spring you could run up to 12 PSI.

Ninja edit: Just realized you are going to run a manual boost controller. Disregard all of that ^ it doesn't apply to you.
Yeah I might go the electronic in the future but my build list is already expensive enough. Manual is good enough for me until I get comfortable with the new setup.

Now here's to hoping it won't be useless power considering us G guys are bascially limited to 285 out back.

Joepro 01-28-2014 01:31 PM
Quote:
Originally Posted by jwick (Post 2669771)
Yeah I might go the electronic in the future but my build list is already expensive enough. Manual is good enough for me until I get comfortable with the new setup.

Now here's to hoping it won't be useless power considering us G guys are bascially limited to 285 out back.
The more I think I guess this is what I am ultimately getting at, I rather have a manageable 450 ish that over 500 and it be totally useless.

jwick 01-28-2014 01:41 PM
Quote:
Originally Posted by Joepro (Post 2669787)
The more I think I guess this is what I am ultimately getting at, I rather have a manageable 450 ish that over 500 and it be totally useless.
My tuner isn't really comfortable with anything over 400 ft/lbs on a DJ for this drive train. So basically my instructions to him are I want a torque curve like a table top (at ~400ft/lbs) and WHP will fall out where it does.

In my current mod state NA 2nd gear is basically worthless in anything but a straight line now and I've learned to drive around it. I'm sure this too will be a learning process.

Boosted Performance 01-28-2014 02:07 PM
As per instructions, the 7psi springs are a great start with this kit. From there you can bring the boost up to a desired level with a boost controller. Usually around 10psi.

I would not start with a 4psi spring unless you want to run a max of 6psi with a boost controller.

I have said it many times, each tuner has his own "idea" of what a safe level is for each platform. On the VQ37vhr this will range from 400ft/tq at the wheel all the way to 480ft/tq at the wheels. TQ is always the indicator of how comfortable the tuner is, not so much the HP.

Another thing worth noting is that you can have two identical cars, identical turbo kits, fuel, boost pressure...ect. Same dyno's but different tuners. Each graph will be different though, because timing will play a huge role in what your tq/hp look like. The dyno graph is almost like the signature of your tuner, not so much the kit.

jlo370z 01-28-2014 05:46 PM
1 less kit available ;)

Joepro 01-28-2014 05:58 PM
Another dumb question..say I got the car tuned at say 10 or 11 psi would the ecu be able to properly adjust if I decided to cut the boost down to say 6 or 7 psi? Or would I need the tuner too make 2 maps?

Joepro 01-28-2014 05:59 PM
And people stop buying these kits so fast I only need a,few more days to get the funds together!

GaleForce 01-28-2014 06:50 PM
Quote:
Originally Posted by jlo370z (Post 2670112)
1 less kit available ;)
:rock:

jlo370z 01-28-2014 06:54 PM
Quote:
Originally Posted by GaleForce (Post 2670232)
:rock:
thats exactly what i look like right now:icon18:

GaleForce 01-28-2014 06:58 PM
Quote:
Originally Posted by Joepro (Post 2670139)
Another dumb question..say I got the car tuned at say 10 or 11 psi would the ecu be able to properly adjust if I decided to cut the boost down to say 6 or 7 psi? Or would I need the tuner too make 2 maps?
You just get one tune. Waste gate springs ~7psi is my low boost, then the boost controller, when active, bumps it up to ~11psi both using the same tune/map.

Where you might want a couple maps is for different grades of fuel. I have one for 93/4 octane and one for 91 octane.

OldBoy 01-28-2014 07:01 PM
Quote:
Originally Posted by m3chhawk (Post 2669577)
Boost by speed won't work for a BP kit. I can break the back tires loose on waste gate pressure at 80 mph with the base map.
I'm in the same boat as you. I would lose traction in 3rd at 70mph, sometimes even in 4th!! The suspension on these cars are not meant to hook up with all this power.

Quote:
Originally Posted by Joepro (Post 2669523)
How are the BP kit owners combating low gear traction issues? Anyone setup boost by speed with an EBC? One of my techs at work set it up on his neon(dont laugh 550 whp sub 11 seconds) and swears by it say it makes it more manageable on the street as well.
I have an HKS EVC6 and did not wire it to run by speed/rpm. I find it useless as some members have mentioned. However, I do plan on upgrading the LSD to an OS Giken one with a LESS aggressive final drive gear (3.3:1) so as to, maybe be able to use the 2nd gear. Toyo R888's and a more neutral camber setting will probably help quite a lot also.

Boosted Performance 01-28-2014 07:18 PM
Quote:
Originally Posted by jlo370z (Post 2670112)
1 less kit available ;)
Thank you for the order. :tiphat:


2 KITS LEFT





For those looking to purchase down the road, I will be building another batch of six late fall. I still plan on taking orders in the meantime, but these will be built as the orders comes in.

zguynate 01-28-2014 07:44 PM
Quote:
Originally Posted by GaleForce (Post 2670252)
You just get one tune. Waste gate springs ~7psi is my low boost, then the boost controller, when active, bumps it up to ~11psi both using the same tune/map.

Where you might want a couple maps is for different grades of fuel. I have one for 93/4 octane and one for 91 octane.
Would this not make your car run rich when boosting at a lower pressure? If it were tuned at 11 psi and you drove it at 7psi? I was always under the assumption that you would need 2 separate maps for a situation such as that.


All times are GMT -5. The time now is 04:50 PM.
Page 26 of 99 « First 162425 26 27283676 Last »
Show 40 post(s) from this thread on one page

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0 PL2