Extractor Manufacturing

[west_minist]

Tim/ Ed.

While tuning for the better airflow should give gains.
is there any issue with the stock tune in bolting these to a stock car?
i.e AFR's are all still safe to just bolt on and forget?

Cheers

We have not tune the headers yet.

The Stock car works too poorly, but it may improve the car and may most probably ping less.

[Tradewind]

OK

We have firmed up the specification, everyone is liking the results up to this moment - this is what we go with

ADM Garage V2 headers lol

[illuzn]

If you have an auto just check warm stall speed with stock and with extractors. A bit of low end besides should see a few more RPM.

Not sure what you mean

I believe he means this as a testing procedure.

Stock: Hold down brakes and accelerator (at full throttle) - record the stall speed (i.e. the RPMs which the engine will not go any higher).

Post-mods: Repeat procedure.

Theoretically, if there is more power through the drive train you will have a higher stall speed.

Final point, don't do this for excessive periods of time, I don't guarantee what will happen to your gearbox if you do. See below for the long story.

Long story: Basically, a torque converter is like a clutch - it allows your engine to spin at a different speed than the wheels. It does this with pump and a turbine - in simple terms the pump spins your automatic transmission fluid and applies pressure to it; this fluid then applies pressure to the turbine (which is connected to the wheels). This explains a whole heap of phenomena that arises with automatic transmissions (e.g. why when you hit the accelerator in a fixed gear, the revs rise significantly).

Stall speed is a measure of the maximum pressure which your engine is able to generate in your torque converter with the wheels stationary. Basically, it is the speed at which your engine can't turn the pump any faster (keeping in mind that with stationary wheels - the engine is effectively pumping fluid against a brick wall and having it bounced back at it through the transmission) - for obvious reasons this is a function of engine power (at some point, the amount of fluid coming backwards will equal that pumping forwards). For this reason in an automatic transmission, stall speed is a pretty good measure of engine power. More power = more forward pumping force = higher RPMs reached.

On a side note, building up the torque converter is the most effective way I have found to launch the car. Depending on how hot it is outside I can actually get close (within 0.2 seconds) of the factory claimed 0-100 time. Your results may vary though. Some people advocate building up the revs in neutral then slamming it in drive - having broken the gearbox on another automatic transmission car doing this I would not recommend it. Getting to the stall speed on the torque converter is much safer (provided you don't stay on it for too long).

For the scientific explanation, see here http://auto.howstuffworks.com/auto-parts/towing/towing-capacity/information/torque-converter1.htm/printable

[illuzn]

OK

We have firmed up the specification, everyone is liking the results up to this moment - this is what we go with

ADM Garage V2 headers lol

Apologies to the powers that be for the double post.

Tim, where is the order form? I assume the header is the same for auto and manual.

[Tradewind]

I need to run a quick check with an automatic car. Really if anyone had an underside photo of their automatic car we could compare it in 10secs flat

i ahve underside pics of manual trans car

I will put an order system in place in next 7 days

Exhaust technician has been asked to make up all remaining materials into header sets now we have established the arrangement. This will gradually become available/for sale over the next 2 weeks

[Tradewind]

About 1 week from now customers are going to steadily start recieving their extractor/header sets. First orders/invoices completed processing with early ordering customers already.

I am winding up production slowly, if you recieve a PM or email then from me regarding your interest - then know your moment for extractor/header goodness has arrived and I will be needing postage details etc etc

Some pics in a couple of days of first painted M/S set

[Lib 3.0LR]

About 1 week from now customers are going to steadily start recieving their extractor/header sets. First orders/invoices completed processing with early ordering customers already.

I am winding up production slowly, if you recieve a PM or email then from me regarding your interest - then know your moment for extractor/header goodness has arrived and I will be needing postage details etc etc

Some pics in a couple of days of first painted M/S set

Tim what about for the Auto's

[Robbks]

Tim, would you suggest heat-wrapping for any benefits for these headers?
If it's useful could be optioned on when ordering.

[3rspecb]

The k2gear extractors I bought were ceramic coated and I also heat-wrapt them. It was my first time heat-wraping any kind of extractors and what a pain in the arse it was to do..

[illuzn]

Tim, would you suggest heat-wrapping for any benefits for these headers?
If it's useful could be optioned on when ordering.

I'd suggest ceramic coating them instead.

See here for the reasons why: http://www.350z-tech.com/wiki/index.php/Header_wrap_vs_Header_coating

[Robbks]

Sounds like rhetoric from the makers of said ceramic coating products....

[Tradewind]

About 1 week from now customers are going to steadily start recieving their extractor/header sets. First orders/invoices completed processing with early ordering customers already.

I am winding up production slowly, if you recieve a PM or email then from me regarding your interest - then know your moment for extractor/header goodness has arrived and I will be needing postage details etc etc

Some pics in a couple of days of first painted M/S set

Tim what about for the Auto's

Not to worry, I will check that it can fit an auto trans soonest I can find a Mackay car for inspection OR you get your vehicle on a hoist and take some good quality pics and send them to me......

[Tradewind]

The k2gear extractors I bought were ceramic coated and I also heat-wrapt them. It was my first time heat-wraping any kind of extractors and what a pain in the arse it was to do..

Thanks for the input

I won't be heat wrapping, customers are welcome to do it themselves. Its always been reported to work well (thermal benefits) and sometimes shorten the life of the header material. No header manufacturer offers any warranty when headers are wrapped, so comes from me also

I will offer ceramic coating - its all about how much you can afford

[Tradewind]

Sounds like rhetoric from the makers of said ceramic coating products....

Robbks

http://www.350z-tech.com/wiki/index.php ... er_coating

I gave it a read (which is since I made my earlier comments) and pretty much find it true in my experience.

[MH3.0R]

Now, one of my primary motivations to purchase headers would be the sound. Do they produce more of the boxer six sound (Porche like) than a holden straight six sound (really annoying)? Is the sound primarily generated by the primaries and their lengths or the relationship between the primaries? Would there be much more development required to cater for a good sound as well as the performance?