Suggestions on aftermarket headers with a Turbonetics turbo system? What ones fit.

 

lol I dont think you can put headers after you put a Turbo It wont do any good. Im not sure though

 

I have a single turbonetics kit that utilizes the stock exhaust manifolds. two pipes join together into a y-pipe and the turbo sits behind the driver side headlight. I would like to switch out the stock ones for possible an equal length. The only problem is that the downpipe looks like it could be in the way. Does anyone out there have aftermarket headers with the turbonetics kit?

 

I dont think you can put headers after you put a Turbo It wont do any good

 

OFF COURSE!!!! I am using the Crawford Headers with my kit, Fit was tight, but works perfect and makes great power!

 

as he mentioned once already, the turbonetics kit DOES NOT replace the headers with turbo manifolds like most kits... so you CAN physically put on headers.

now, if you meant that putting headers on won't do anything for the performance... i have heard some people say that aftermarket headers may affect the boost level and how fast it comes in... D350Z10, how did the Crawfords affect your turbo? more/less boost? quicker spool up or slower?

 

How did you get 450RWHP @ 9.5 psi? Is that with the TN kit? Can you please post a dyno. Thanks.

 

Hey whats going on, My car is at the shop right now, and the first runs they ran with the U-tec were 450 rwhp/tq, they are still tunning and getting some flaws out, they car is going to be there till thrusday, I will have a dyno graphs on thrusday!
I hit full boost around 4000ish, The car is undergoing fine tunning, since my shop is tunning the first turbonetics Z with the U-tec.... they are taking there time. My A/F ratio was a bit high, when they ran with the emanage blue untuned.... so when they changed with the U-tec and ran it base with my mods and minor tunning showed 450.2rwhp and 450 rwtq... spiking at almost 10 psi.... so still alot of works needs to be done but.... I will keep you guys updated.

 

All I can say is WOW!!!

 

I have Nismos on mine. Had to modify the downpipe a little. But it fits okay.

 

Thanks guys for info on headers!! By the way D350Z10 I am trying to target 450 whp on my Z as well and I felt it for sure needed 440 to 550 cc injectors after doing the calculations. Which is target horsepower multiplied by brake specific fuel consumption (B.S.F.C.) divided number of cyl. multiplied by the duty cycle which would be 50-80%. Thats I came up with a good number 550cc injectors along with a return fuel system which would also have a fuel pressure regulator an essential part to tuning.The Turbonetics kit comes with 380cc inj. did you switch them out? Or are you still using the same. Please let me know how your Utec tuning comes along. My Utec should be here next week 15th or 16th of of Dec.

 

Sounds nice! One thing about running headers with this kit is you will hit boost later. I was running the DC Sports headers with the kit and it caused all kinds of fitment issues. I ended up taking them out because my downpipe was contacting the frame at the v-band clamp. I ended up busting the clamp and getting a massive exhasut leak. Since then, I've taken the headers out and gone back to the stock manifolds.

One problem with headers, is while you will make a little more peak whp, you will be hitting boost later. In my case, I lost about 8-9whp by going back to the stock manifolds. But, in return, I was hitting full boost about 600-700rpms sooner.

My car also runs a lot smoother and is a bit more enjoyable to drive. Right now I hit 9psi at about 3300rpms. Hopefully with my boost controller in this week I'll be hitting 8.5 psi closer to 2900-3000 rpms.

One issue with the headers that kind of concerns me is the long term durability of the thin-walled stainless steel headers in the long run. I don't think they were made to withstand the kind of heat a turbocharged system produces, and they aren't nearly as sturdy as the stock cast manifolds. Hopefully there won't be any issues, but I wouldn't be surprised to see some aftermarket headers cracking sometime down the road.

 

Oh, and I meant to ask how they achieved such an increase in power with the UTEC? Did you add any other mods or was this achieved by tuning/timing alone? Do you have any plenum modifications? Did you go with a fuel system and also up the injector size?

From what I understand, the 380cc denso core injectors that come with this kit actually flow very, roughly the equivalent well of a 410cc injector (anyone that has actually sent them in for analysis let me know)... but, I think they'd be good into the low 400's, maybe 410-420whp. Anywhere above that and I'd definitely go with the 440cc injectors.

I am very surprised that you would be getting 450whp at 9psi. Also, what kind of dyno was this on?

 

Hey whats up, I was running the 380cc inj which were maxed out, and before I was running untuned without the turbonetics reflash just emange blue and ran 412.4rwhp and 405 rwtq. Since now they are tunning my car... they started to see better numbers. It was on a dyna pack dyno.... His dyno also suprisingly reads alot lowers than others.....Also I always run 94 octane sunoco fuel in my car. That was in the begining stages of tunning they are going to be done either wenesday or thrusday. I don't want to rush them, so I let them take all the time they need. Also I hit full boost at around 4000ish -to high 3900's. The fitment was not an issue suprisingly for me the Crawford headers come up alot so the down pipe fit under them.

 

The Denso 380cc injectors that come with the kit were rated at 380cc at 2.75 bar (39 psi of fuel pressure) as opposed to the industry standard 3 bar (43.5 PSI). Therefore at the fuel pressure Turbonetics runs (53 PSI at idle and roughly 47-48 PSI at full boost) these injectors actually flow more like 415-420 ccs. At that rate 420-430 should be fine.

 

Any more info on the UTEC? Are they having any kind of problems with it and the TN kit? I would just like to know because my UTEC should be here any day now. Thanks

 

I have the alphawerks headers. they were no issues what so ever with the fitment of these headers and my tubonetics ST. what i originally thought was a vibrating problem caused by the headers was actually a O2 plug that worked itself loose. Till this date i have been issue free. Will be doing the UTEC upgrade as well. along with a few other goodies! i was thinking about emanage ultimate but i have since changed my mind.

 

The last I heard from my shop was... the U-tec was in the car, wired up perfectly and thats all i know. They did minor tunning and it did wonders, but they are still learing different things about my car and how it runs. So I will let you know by thrusday.

 

wow those are awesome numbers, thats an avg 75 more hp than others with the TN kit.

 

Thanks for reminding us tig