[viscous180]

does anyone know any places in victoria, preferably west, that enlarge the stock manifold??.. Im changing my turbo and have decided to keep the stock manifold but i'd like to get it enlarged if possible ..

thanks

[nuutz]

what turbo r u putting on? from personal experience, i would just do it properly so u only have to do it once..get a new manifold..

[viscous180]

apexi ax53b70 .. i rather save for a steam pipe manifold if anything and stock manifold i currently have is good ..

[STR8E180]

for vic

there is a place in ballarat that does it, around 500 for a gtir exhaust manifold. but 30% increase in flow

or

there is this place but they are in sydney
http://www.abrasiveflow.com

[Ryan_RB]

extrude honing yeah kemp?

[STR8E180]

Ryan_RB, on Jun 24 2009, 02:17 PM, said:

extrude honing yeah kemp?

YEP ITS extrude honing

[antonio]

Pricey to say the least, are you sure gains are 30% Kemp?

Is this just sand blasting or 1 step further? Because sand blasting was going to cost me around $400 when i was putting the t518z on but decided against it, and then at best CFM results only showed an increase of 15-20%.. 30% increase would surely help with my spooling

[viscous180]

gee if its 30% id definately be interested

[STR8E180]

antonio, on Jun 24 2009, 02:53 PM, said:

Pricey to say the least, are you sure gains are 30% Kemp?

DONT QUOTE ME !!!

i just copied and pasted

i dont even live in melb
i just googled extrude honing in melb and thats wat came up so i just copied and pasted it on here for u guys

[STR8E180]

antonio, on Jun 24 2009, 02:53 PM, said:

Is this just sand blasting or 1 step further? Because sand blasting was going to cost me around $400 when i was putting the t518z on but decided against it, and then at best CFM results only showed an increase of 15-20%.. 30% increase would surely help with my spooling

sand blasting and extrude honing are 2 different things

sand blasting is just cleaning
it will take all the surface dirt of and return it back to its base finish (just like when u get a cylinder head reco'ed)

extrude honing is when they push abrasive jell thew ur manifold and it cleans up the inside casting and it all becomes smooth

u can also extrude hone cylinder heads BUT not many engine builder go with this option because extrude honing can not be controlled
if u have seen it being done u will understand
its an abrasive jell which goes every where a die grinder cant, it can go any where a CNC machine cant
BUT it goes all over the place it
u cant control the shape of the port <--- this is why its not seen much in cylinder head porting
when porting cylinder heads some times u want to change the shape and just focus on changing the shape of the port and not the whole over all size, extrude honing wont be able to do this

here is a picture
hope it helps

its good for intake and exhaust manifolds

[japcars]

why would't you just go a gktech manifold?

[STR8E180]

i would rather have a extrude honed standard exhaust manifold then a stainless steel manifold

[sr_drifter]

japcars, on Jun 24 2009, 05:44 PM, said:

why would't you just go a gktech manifold?

why would u downgrade to stailess steel?

[Ryan_RB]

STR8E180, on Jun 24 2009, 06:50 PM, said:

i would rather have a extrude honed standard exhaust manifold then a stainless steel manifold

and it looks stock etc.

it makes the most of what you have... i personally want to try it once my manifold becomes a restriction.
have also heard of it being used on turbo housings too.

[-SR NRG-]

imo its not worth the money spent modding stock manifold.
stock mani works good as it is, if you want imporoved flow for larger turbos then get your self a descent, powertune/kelway/6boost steam pipe mani

[viscous180]

japcars, on Jun 24 2009, 05:44 PM, said:

why would't you just go a gktech manifold?

gotta read up on it curm .. stainless stell are all junk .. only thing that beats cast is steampipe

this is why i think u had a bad lag problem too

[Ryan_RB]

-Street(O)Forced-, on Jun 24 2009, 07:39 PM, said:

imo its not worth the money spent modding stock manifold.
stock mani works good as it is, if you want imporoved flow for larger turbos then get your self a descent, powertune/kelway/6boost steam pipe mani

mmm not worth the EPA headf**ks, i rather get a stock mani extrude honed to work well with a mid sized low mount....

[viscous180]

^^ thats a pretty good point actually .. if benefits are the same i choose benefits over looks

[-SR NRG-]

Man if you got a pod and a cooler on your car you gonna cop shit from police anyway.

Point is when the standard manifold starts being a restriction on your set up and you need to enlarge it then you already have a lot of shit on your car your gonna get rapped with.

[viscous180]

^^ also true .. can you still get done for an ARC airbox?

[Ryan_RB]

-Street(O)Forced-, on Jun 24 2009, 09:28 PM, said:

Man if you got a pod and a cooler on your car you gonna cop shit from police anyway.

Point is when the standard manifold starts being a restriction on your set up and you need to enlarge it then you already have a lot of shit on your car your gonna get rapped with.

airbox FTW

2871 can fit under standard heatshields cant it?

[antonio]

-Street(O)Forced-, on Jun 24 2009, 08:28 PM, said:

Man if you got a pod and a cooler on your car you gonna cop shit from police anyway.
Point is when the standard manifold starts being a restriction on your set up and you need to enlarge it then you already have a lot of shit on your car your gonna get rapped with.

How do you begin to diagnose that the manifold is a restriction for the turbo anyway? Is there a power output/flow rate level that they just dont become worth wild?

[STR8E180]

a extrude honed exhaust manifold will still me limited compared to our merge collector powertune manifold

[STR8E180]

antonio, on Jun 24 2009, 09:12 PM, said:

How do you begin to diagnose that the manifold is a restriction for the turbo anyway? Is there a power output/flow rate level that they just dont become worth wild?

when u cant get exhaust gas out of the exhaust ports fast enuff that the exhaust gas is still left in the cylinder ur exhaust manifold is becoming a restriction