EA82T Head to Turbo 'Power Pipe' Upgrade

flat04 · Post by **flat04** » Mon Oct 09, 2006 8:36 pm

Sammy, $300 freight, far out. How come it costs $1000 to get a car from Japan but your headers cost that much?? What differences apart from the sound did you notice? Did you get it dynoed at all?

Andrew

sammynb · Post by **sammynb** » Mon Oct 09, 2006 11:19 pm

flat04 wrote:Sammy, $300 freight, far out. How come it costs $1000 to get a car from Japan but your headers cost that much?? What differences apart from the sound did you notice? Did you get it dynoed at all?

Andrew

That is the only way techworks agreed to ship them, insured using UPS!
Not yet as the thing wouldn't run with the standard ecu so I've been, slowly, sorting that out (see other thread.)

mattl200 · Post by **mattl200** » Mon Oct 16, 2006 10:30 pm

if anybody is still thinking of fabrocating their own ive herd if u stick to the max sizes of your outlet and turbo inlet you should get the best out of it

use the same size pipe as the outlets on the heads and merge them into a single pipe the same size as the turbo inlet using mandrel bends
its no use putting a 3" pipe there if the turbo only has a 2" hole for the air to flow through

schultzie · Post by **schultzie** » Tue Oct 17, 2006 7:32 pm

makes sence.... if itis larger would this not help the scavenging effect?

Subafury · Post by **Subafury** » Thu Oct 19, 2006 12:23 am

how much has anyone else paid for headers? and what size?

schultzie · Post by **schultzie** » Thu Oct 19, 2006 7:57 pm

im still wiaiting for a price from extreme rx..

just boutght a house to my plans will take a little longer to come to fuition...

wagonist · Post by **wagonist** » Thu Oct 19, 2006 10:24 pm

schultzie wrote:makes sence.... if it is larger would this not help the scavenging effect?

It might help with getting more of the gas out of the engine, but you're trying to keep the gas speed up.
Higher gas speed means faster turbo boost.

The larger the pipe diameter, the greater the cross-sectional area(A), and therefore the lower the speed(v) because the flow rate(Q) is the same.
Its a pretty standard hydraulics formula: Q = v * A
Crap, I just used something I learnt at uni

But you can get to a point where you'd be strangling the engine, which would lower the flow rate.

I like the idea of picking the ports sizes & making the pipes out of that. Work out the cross-sectional area of each individual port, add them together to work out the area required for the up pipe. If this is then bigger than the inlet size of the turbo, I'd then put a smooth taper down to that size. This will reduce any losses with lowering the area, but should help with increasing the gas speed to help the turbo spool up.

You can tell I've never thought about this, eh? Aiming to do something with a 4-1 and pipe sizes with my EJ when funds allow.

steptoe · Post by **steptoe** » Thu Oct 19, 2006 11:47 pm

turbo works on expansion of gas so more room might allow it to expand faster and spin better ?

might be variation of hydraulics formula but shouldn't that formula be kept for liquids not compressable stuff like air and gas ?

wagonist · Post by **wagonist** » Thu Oct 19, 2006 11:57 pm

Yeah, the hydraulics formula is a very simplified version.
I could get my brother who has a PHD & is currently being paid by Rolls Royce to work on jet engine theory at Cambridge uni to give a 3000 page citation if you want. LOL
But as a gas expands, the molecules don't jostle each other as hard as they have more room to move.
The scavenging theory is based on a gas rapidly expanding & then creates a vacuum to suck what's behind it, it won't push what's in front.

Xtreme_RX · Post by **Xtreme_RX** » Fri Oct 20, 2006 10:23 am

The pipe I am getting made up is exhaust port & turbo matched. The idea is to retain the Factory ECU but deliver more power.....

schultzie · Post by **schultzie** » Fri Oct 20, 2006 4:05 pm

ok and this will obviesly help with those of us who are running after market stuff eh?

Xtreme_RX · Post by **Xtreme_RX** » Fri Oct 20, 2006 4:20 pm

Yes it will. Better than factory ECU with the new pipe, due to the tuning ability of the after market system.

I can get the pipes made to suit a larger turbo than the VF2/4.

The idea was to make a pipe which will fit & work with factory ECU systems /settings, But still allow those of us who have aftermarket ECU's to extract more power.

timmo · Post by **timmo** » Fri Oct 20, 2006 4:37 pm

Xtreme_RX wrote:
I can get the pipes made to suit a larger turbo than the VF2/4.

re power.

Is this what the EA82T came out of the factory with?

stinky · Post by **stinky** » Fri Oct 20, 2006 4:44 pm

I've got an ea81t which I think has the same ports as the ea82t. It's got the ea82t turbo on it as well. So I *think* these will suit me. I've been looking for a decent aftermarket headers solution for a while. I'll almost definately be up for a set!

Xtreme_RX · Post by **Xtreme_RX** » Fri Oct 20, 2006 6:06 pm

Timmo - Yes the VF2 & VF4 were the factory delivered turbo’s

Stinky - Yes it is, Dave Martin from the Subaru 4wd club is after a set too.

stinky · Post by **stinky** » Thu Oct 26, 2006 11:41 am

Sooo, what sort of timeframe are we looking at ?

Xtreme_RX · Post by **Xtreme_RX** » Thu Oct 26, 2006 1:30 pm

With in the next few weeks, before Christmas....
Just waiting on my new turbo to turn up..............

stinky · Post by **stinky** » Mon Nov 20, 2006 4:12 pm

still in progress?

Xtreme_RX · Post by **Xtreme_RX** » Mon Nov 20, 2006 4:18 pm

I have made a different choice of engine (EJ20T) to fit to my new project car, I am still going to develop the pipe it just will take a bit more time...

BlackMale · Post by **BlackMale** » Mon Nov 20, 2006 5:25 pm

Looks like I am a late starter on this thread – sorry I fell of a while ago however from what I can gather from the last page is it correct that someone (specifically Mr XtremeRX) is fab’ing up some of these pipes? I need to find out a price as I would be interested. I will attempt to back read the 7 or so pages however feel free to PM or e-mail me some info as well

Thanks