I am contemplating purchasing these...

 

https://www.z1motorsports.com/z1-products/z1-motorsports/z1-25-bolt-stainless-steel-downpipes-p-2958.html

 

Can I ask for people's opinions please?

 

Not sure if they are a bit limited with regards to power enhancements in the future.

As things stand, I intend to stick with stock turbos and just enhance their performance further down the line.

ie raising boost and improving induction etc.

Just do not want to end up with them being a limiting factor that's all.

 

Would appreciate it if you would share your thoughts guys, even if it means an alternative downpipe design/manufacture.

 

Thanks in advance...

Those are an old design (V1 if you will). If you are sticking with 2.5" diameter exhaust and standard turbos then these are the

next generation (v2 super split):

 

https://conceptzperformance.com/labree-super-split-aluminized-divorced-flange-downpipes-4-bolt-2.5-nissan-300zx-90-96-z32-14449-vt104_p_1159.php

 

and in stainless steel:

 

https://conceptzperformance.com/labree-super-split-stainless-steel-divorced-flange-downpipes-4-bolt-2.5-nissan-300zx-twin-turbo-tt-90-96-z32-14449-vt104ss_p_1161.php

 

I have the 5 bolt version in aluminised steel which I will use with JWT 530BB turbos.

Those are an old design (V1 if you will). If you are sticking with 2.5" diameter exhaust and standard turbos then these are the

next generation (v2 super split):

 

https://conceptzperformance.com/labree-super-split-aluminized-divorced-flange-downpipes-4-bolt-2.5-nissan-300zx-90-96-z32-14449-vt104_p_1159.php

 

and in stainless steel:

 

https://conceptzperformance.com/labree-super-split-stainless-steel-divorced-flange-downpipes-4-bolt-2.5-nissan-300zx-twin-turbo-tt-90-96-z32-14449-vt104ss_p_1161.php

 

I have the 5 bolt version in aluminised steel which I will use with JWT 530BB turbos.

 

Thanks Andrew, I now understand a little more about the actual full spit design and the actual advantages.

As you say, definitely the way to go.

I'm sure in reality they will be fine. They seem to be very similar to the japspeed items that many people over here run including me.

Mine will actually be up for sale in a bit once the new turbos go on.

I'm sure in reality they will be fine. They seem to be very similar to the japspeed items that many people over here run including me.

Mine will actually be up for sale in a bit once the new turbos go on.

 

Well, I will certainly have to consider budget along side design, albeit the budget will probably take second place over choosing the design.

What sort of price would you be looking at out of interest?

What would people's thoughts be about something like these?..

 

https://www.z1motorsports.com/exhaust/ams/ams-30-stainless-steel-downpipes-available-in-or-bolt-p-3359.html

What is your motivation for wanting to change the downpipes in particular Dave?

What is your motivation for wanting to change the downpipes in particular Dave?

 

Hi Joel,

My main motivation, in the not too distant future, is to work towards upgrading the general performance whilst maintaining the stock turbo's

(not sure if this is the right way to go mind, as I do not know the potential of stock turbo's)

At the moment I am looking at both before and after them to try and determine the best combination.

Hi Joel,

My main motivation, in the not too distant future, is to work towards upgrading the general performance whilst maintaining the stock turbo's

(not sure if this is the right way to go mind, as I do not know the potential of stock turbo's)

At the moment I am looking at both before and after them to try and determine the best combination.

 

Massively underrated that's the answer.

What would people's thoughts be about something like these?..

 

https://www.z1motorsports.com/exhaust/ams/ams-30-stainless-steel-downpipes-available-in-or-bolt-p-3359.html

 

My thoughts about AMS are unprintable Dave.

There's a pair of Z1 downpipes for sale as second hand never used for £100 onbthus club right now...

There's a pair of Z1 downpipes for sale as second hand never used for £100 onbthus club right now...

 

Thanks Stephen, unfortunately they are 5 bolt though.

 

- - - Updated - - -

 

My thoughts about AMS are unprintable Dave.

 

Enough said.

I thought the general consensus was 3" is a bit OTT for stock turbos. Don't quote me though! Do you have a 3" exhaust?

 

Jimmer is currently fitting these to mine https://conceptzperformance.com/megan-racing-mr-ssdp-n300-v2-version-2-v2-test-pipes-and-4-bolt-downpipes-90-96-300zx-tt-z32_p_11801.php as japspeed ones are no longer available, and I didn't want to spend anywhere near the amounts suggested by the products linked above!

I thought the general consensus was 3" is a bit OTT for stock turbos. Don't quote me though! Do you have a 3" exhaust?

 

Jimmer is currently fitting these to mine https://conceptzperformance.com/megan-racing-mr-ssdp-n300-v2-version-2-v2-test-pipes-and-4-bolt-downpipes-90-96-300zx-tt-z32_p_11801.php as japspeed ones are no longer available, and I didn't want to spend anywhere near the amounts suggested by the products linked above!

 

To be honest, I don't actually know the size.

All I know is that the test pipes are Japspeed attached to a Mongoose rear set up, looks about 2" to 2 1/2" to me. (guessing mind)

Massively underrated that's the answer.

 

So plenty of potential then?

Worth building my mods around?

So plenty of potential then?

Worth building my mods around?

 

http://specialtyz.com/blog/?p=441

http://specialtyz.com/blog/?p=441

 

Thanks Stephen.. :thumbup1:

So far I think I understand what I need for the turbo end, my only potential issue is determining that they will fit my test pipes.

I'm guessing I will need to know the actual bore dia'? and bolt configuration?

Or are they fairly universal?

My thoughts about AMS are unprintable Dave.

 

I have the 3" AMS downpipes fitted and, aside from a very small massage required during fitting (thanks, Jimmer), I have nothing but positive things to report about them. They appear to be well made, which is a big plus point.

 

I know all about their slightly shady business practices and the vitriol that accompanies any mention of them on Facebook but, for someone without large amounts of cash to spend, they're a good deal.

 

Would I have liked the Speciality Z originals? Very much so.

 

Did I have that sort of money available...? Hell no!!

I'm not sure why I think this, but in the back of my mind I believe the Japspeed test pipes to be 2" bore.

Would this be correct would anyone know?

I'm not sure why I think this, but in the back of my mind I believe the Japspeed test pipes to be 2" bore.

Would this be correct would anyone know?

Can't buy them anymore so it doesn't matter too much! I thought they were 2.5 though

Can't buy them anymore so it doesn't matter too much! I thought they were 2.5 though

 

Thanks Chris.

I already have them fitted, just interested as to whether or not I can utilize them.

If they are in fact 2 1/2" then I will be happy for now.

What have you currently got?

1. Japspeed decays/divorced downnpipes.

2.?

3.?

 

I'd probably spend your money else where, like injectors or intercoolers. In an ideal world you'd want 3" turbo back, in the real world though you won't be using E85 which is what really jump the power up on these "breather cars".

Edited June 6, 20178 yr by Stephen

What have you currently got?

1. Japspeed decays/divorced downnpipes.

2.?

3.?

 

I'd probably spend your money else where, like injectors or intercoolers. In an ideal world you'd want 3" turbo back, in the real world though you won't be using E85 which is what really jump the power up on these "breather cars".

 

Currently I have the original cast iron down pipes.

Japspeed test pipes.

Mongoose from there on. (Quad tip)

Bit of a mish mash to be honest, should go for a new, single manufacturer throughout really.

 

I understand what you are saying about spending elsewhere, my plan is to enhance things throughout, but having made the decision to stick with the stock turbos, I thought I would work backwards first.

Edited June 6, 20178 yr by redwine300

Dave, from Greg Dupree@SpecialityZ comes this advice on what can be achieved when retaining stock turbos and

adding on "breather" parts:

 

"I am here to tell you that IN MY OPINION it would be better to upgrade your intercoolers and pipes rather than upgrade your turbos if your not going to do both"

 

Full post which includes what can be achieved with stock turbos (and stock engine) which is relevant info for you:

 

"And last we will add a stock turbo, stock engine car to the chart that has 2.5" intercooler pipes, 2.5" Ash intercoolers, full 3 inch Exhaust, MS Manifolds, Selin dual intake, 740cc injectors"

 

http://www.twinturbo.net/nissan/300zx/forums/general/view/2415470/A-little-info-about-turbos-and-pipes-DYNO-CHARTS.html

Once again Andrew, thank you.

What a great read, very appropriate to my future plans.

Watch this space.