AlanG

FWIW I use a GT Spec GenII

RoRu

I read a lot of post on here from people who are having problems with some of the cheaper tubular headers blowing gaskets, I've had a set of HKS for 3 years now without a single problem from the day they were fitted and as far as i know i have never read another post from someone who has had a problem with HKS headers.

You get what you pay for i believe.

Craig_g

Out of inerest, what would be a good price for a HKS manifold?

RoRu

I think i paid over £800, not to sure how much they are these days.

Craig_g

And how much are these copies??

RoRu

I think they start at about £250 maybe less.

Craig_g

Apart from the gasket issue, does the HKS header have anything more to offer? The way I see it, (from an HKS point of view) if you could get a manifold, exactly the same for a fraction of the price, surely they'd lower the price????? As the price is some what higher, this says to me that it is better and has more to offer. Would I be wrong in thinking this, and if so, why???

Sorry about all of the questions.........but thats what a forums for isn't it! lol

al125

iTrader: (2)

Just been looking at the HKS ones and i must say they are a nice pice of kit. I think if bought for the right price they will be ideal because it has pre fab pipe work and flange for an external waste gate

al125

iTrader: (2)

Is it just me or dose the hks manifold above look the rong way round comperd to pictures of all the other ones?

RoRu, are the ones above the same as the ones you have mate?

RoRu

Mine look nothing like that as you say there look the wrong way round the collector should be on the other side.

Also i do not have the remote waste gate pipe on mine, never seen that on a set of headers either.

Found a picture.

scoobysmiff

iTrader: (2)

Hayward and scott do a se t of equal length headers for £500, not got any yet but will be trying some in the future

Craig_g

Would you use HKS if you could get it at the right price? What I'm basicaly trying to say is.......do you avoid HKS because of the price?

RoRu

I think a lot of people do avoid them because of the price but also because they are quite a large bore pipe they tend to create more lag than the smaller bore headers.

Craig_g

Hmmmmmmm.............This is interesting. Correct me if I'm wrong.....(I am not100% clued up).....but wouldn't a bigger bore be more free flowing helping spool up time? Or is it so big that it starts to loose presure?
Also, with the engine management and boost controler being used, wouldn't you be able to accomidate for the lag?

I'm not taking the pi$$, these are genuine questions.

AlanG

The answer is it depends on the engine spec

A small bore header will keep gas speed up and so help spool up time, but in the other turn of the coin, if you have sufficient gas volume flowing through the headers e.g. a 2.5 litre, the small bore headers can become restrictive and so a bigger bore set of headers can be more beneficial.

DuncanG

Al, thats for a twin-turbo Legacy, hence 2 up-pipe flanges!

mikeesingh

iTrader: (3)

im using hks on mine, i think it has a 2'' collector, did have the old gruppe-s on before they had a 2.5'' collector, but got fed up with them leaking, only using hks as i got a used set cheap, would'nt buy them new.

Craig_g

By looking at that pic, I can't see how that can be for a twin turbo Legacy. If you look, the pipes go 4 into one flang and 2 into 1 flange. This to me would say, on turbo is going to get more gas through it, and create a quicker spool up time. Why have one turbo pushing nearly double the boost of the other?

Craig_g

Anyone?

DuncanG

On the sequential twin-turbo only the primary turbo on the left is working up to around 4000 rpm. Thats why one collector has 4 inputs. Once the secondary is opened-up then both turbos work together so its then much like a convential bi-turbo with each turbo being fed mainly by 2 cylinders and very little flow through the cross-pipes. Hence the secondary collector only has 2 direct inputs.

Craig_g

O.k, a bit of a daft question, but when this is all up and running, what do you think it would sound like?

Craig_g

BTTT

al125

iTrader: (2)

Dont know what it will sound like but it should look some think like this














I do have a question for you guys, do the Bremo's expand much when hot as when i have put them on they seem to be only 1 - 2mm from hiting the wheel but have not driven on them yet?

911

Calipers do look very very tight.
Rather than expansion I would consider more wheel deflection on hard cornering. Wheels are not perfectly ridgid.

That is a great engine. I am very 'green'!

Should the hot side of the turbo be well shielded/wrapped?

Very nice, and good luck!

Graham.

Craig_g

Ha Ha! tight squeese with the calipers! Ha ha!

AlanG

I hope you've plugged the hole you can see on the Samco inlet hose to the turbo...

ZEN Performance

why are there silicone pipes onto the suspension topmount studs?

Jolly Green Monster

iTrader: (4)

I assume the hole in the inlet pipe is going to be sorted..

Cannot see that MAF taking much boost to max out and is probably a restriction.

Simon

Jolly Green Monster

iTrader: (4)

Oh and the clearance on the brakes is similar to mine on a classic on the STi8 wheels..
your wheels might flex more than the sti8 ones though.

Simon

P20SPD

iTrader: (1)

Paul, good spot, weird

No vent for the expansion of the water either?

Couple of strange pipes there too, breather going to front of engine.