Best headers flow
 

Hi, I'm about to change the headers/test pipes part of my exhaust. Without considering the cost, does anyone has a feedback about which of these two settings has a better flow rate :

-ISR longtube headers

-Z1 headers + Z1 test pipes




*Z1 doesn't produce anymore longtube Headers...

Z1 has never produced any longtube headers. I have never heard of ISR headers so that should give you a clue about them. If you are looking at long tubes the only 2 on your list should be Fast Intentions and IPP. The search function on here is your friend.

The PPE longtubes headers were the best headers I installed and was quite an improvement. The heat shield is a pain in the rear to get out. The evil bolt is never fun lol. Headers are labor intensive and will take you longer on your first install generally depending on how fast you work but take your time though took me 8 hrs. to install my headers the first time around good luck.

Install headers on our Z’s can be pain staking work.

You want best flow or best power? :icon14:

There are 3 LTH's. PPE, FI, and Motordyne. Motordyne are the new kids. From the little I have seen from them. They're not bad. I have the FI's.

The right side will take you less then 2 hrs. Depending on you skill level.
As said above. The left side is a PITA. The heat shield can be a PITA. Figure on about 6 hrs.

Sorry for my mistake, I realized that I confused Z1 with Stillen when I said that they don't produce headers anymore, and it was for 350z instead of 370z...

And I though best flow was synonyme of best power ?

So until now, nobody has feedback on the z1 Headers+test pipe vs PPE longtube ?

Thanks for your answers !

There was a dyno posted a few years back of the Z1 headers. I don't recall what else was done but it's somewhere in the forum

PPE, FI, Z1, and Motordyne all product power. Each one has it's pro's and con's. No one has done a any testing to see which one is best. Like A vs B vs C.

In fact, Moncef from admin tuning claimed that through all the setting he tested, the PPE are the best, excepted that he never tested on a Dyno a combination of Z1 headers and test pipe. There is a big chance that I'm going to test that out, cause I already got my Z1 test pipes.

i can tell you my Results i have Z1 headers with Berk HFC
Baseline with no tune i made 291whp and 233Wtq
After header install 307whp and 237 wtq
Tuned i made 310whp and 243wtq

http://www.the370z.com/engine-drivet...er-thread.html

Last month I installed solid motor and transmission mounts so I removed my cats and exhaust to give me a little more room to work. While I was there, I thought I might as well do the headers because everything is pretty much off.

Keep in mind I have swaped the motor in my civic and swaped the transmission in my Ford excursion.

I got as far as removing the header heat shields when I realized this just was not worth it. The lack of working space and maniacally sharp heat shields made my hands look like I was a UFC fighter. And to make matters worse, I couldn’t just run with the heat shield removed because they were wedged between the fender and headers. I was forced to reattach them. I lost track of the hours I spent and how much blood I lost.

This is why I plan to have MA Motorsports do this work for me.

The driver side heat shield is a ROYAL PITA.:shakes head: The left side took me 45 minutes to do. The right side 6 hrs. Yeah, my hands looked like and felt like they was in a fight with one very pissed off puty cat. :shakes head:

Stillen long tube intake, FI LTH, FI cbe, Uprev tune. 334hp/279tor.

There was one good thing to come out of it. At the time had a client who was being Charged with armed robbery. It was a court-appointed case so of course he did not trust me. But when I went to visit with him in jail he looked at my hands and almost gasped. I can’t tell you why, but from that time on he always respected me.

i see that tap hanging out the hole :wtf2:

Thought that you beat the crap out of your clients if they didn't pay up. :rofl2:

+1 for the Z1 headers and ART pipes

I'm curious what the collector for the Motordyne headers look like in comparison to PPE and Z1 as those two are similar. But would the Motordyne headers be considered short tubes and not long tube?

a 10 second google search, something to the effect of "motordyne 370z headers" brings you here...https://motordyneengineering.com/pro...straight-pipe/

I understand they label it as long tube, but looking at the where the merge is I was curious what constitutes long tube vs mid vs short. Even in this thread, FI is saying PPE is considered mid-length. I was also curious is anyone has photos of the merge on it.

http://www.the370z.com/intake-exhaus...e-headers.html

But the MCR headers are similar to the Motordyne so I suppose.

http://www.the370z.com/intake-exhaus...e-headers.html

There may be a more technical, official way to describe the difference, but to the best of my knowledge, it's a matter of whether you cats/test pipes are separate pieces or not. In long tubes, that's all 1 piece. I've seen the term mid-length tossed around, but I'm not sure on that.

Z1 are shorties, using separate test pipes. FI long tubes bold directly to your Y pipe or whatever on your catback exhaust.

FWIW the Motordyne headers paired with a single exit exhaust make these engines SCREAM. If this car wasn't my DD I would 100 percent run this set up.

Also between these options you're sweating over a difference you will not even feel, it takes more than 3-5hp. Go with what you can afford.

THIS. :iagree:

Ahh, logic!


Just don't say stuff like this on the Facebook groups! Anything that doesn't produce the highest HP output is considered garbage and a waste of time..... HAHAHAHA

It's hilarious how they argue over 1-3 hp, and never acknowledge that the difference could just be normal run-to-run variance of the dyno.

That part of the Z crowd is weird to me. "Let's spend $100/hp!" :inoutroflpuke:

Yeah and then they want to bitch and moan about tire prices and "how did my stock tires only last 10k miles and have steel bands showing? And NO, I don't run the car hard."

Suuuure, buddy.

Fast Intentions does not mention, nor do they appear to be, equal length. They do mention “firing order specific” which I’ve read is a term that’s not really used anymore.

I went with Motordyne and will have Swain Tech coat them. I was happy with their exhaust, liked that these can also have a Helmholtz test pipe, straight pipe, or even a HFC.

The pipe portion is shorter than what a normal test pipe would be. So they are kind of mid length, but they made the test pipe section as short as possible so the header portion is still pretty long.

I went with the Helmholtz test pipes in hopes that gets rid of anyone unpleasant frequencies.