Turbo Cylinder Head....
Turbo Mini Forums

Has anyone got pics of a standard turbo head inc chambers & ports? Cheers

How quick do you need them buddy?

If you give me time I'll pop a head of a block at the weekend.

Every day is a school day ...........

How fast and how expensive ...... the same question...

Have a look at my homepage. There are some pictures of a Spi head there. The ports and chambers are identical.

Edited by Vegard on 10th Oct, 2007.

thanks chaps :)
Whats your homepage Vegard??

Edited by Jason G on 10th Oct, 2007.

Oh, I thought that was in my profile.

http://home.online.no/~lyngset/pictures.cf...t=97&pDispType=

Cheers Vegard, just need some pics to compare my head too. I am an amateur & don't know what I'm looking at.





Thanks to steve & Jon also

Edited by Jason G on 11th Oct, 2007.

its been worked!

if you need a skim on that and your not in too much of a rush, i can do it for you!

I think just a good clean up is in order. Had no gasket issues, so I don't think a skim is in order. Cheers anyway andy
No. 4 piston is damn oily, so rebuild needed anyways.
Another head would be nice spare parts :)

it also looks to me that the valve guide bosses have are standard! have not been played with

Good call steve. :) Remove guides & remove material?
Its just knowing the differences between standard & modded...then I can understand whats involved.
So you chaps picking at it helps. :)

this is a 295 not a 940 (and it was painted red when i got it), but it shows the obstruction the valve guide boss's make:

with:


without:

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

Chamber is modified, ports look untouched. (The important part)

to be honest i doubt the guide boss is much on an issue with the kind of cams used for turboing..most of the time it is not such a restriction below, say.. 0.450 lift.

just my view:

these days i port a head with the guides in. i just push them back equaly in all ports as a guide then grind the proper shape taking out quite a bit of the guides as well.

i keep the guideboss in place before and after the guide but the sides are ground down quite deep.

porting with guides in keeps you from getting your hands torn off by your BIG grinder while catching in the hole normaly filled with guide.

of course the guides are replaced afterwards.


for a turbo i would probably work on the exhausts a lot..trying to keep enough metal around the guide

that said i have no experience with forced induction heads (having a go at a SC head next week) but have a reasonable grip at NA heads

That sir, is not rust, it is the progressive mass reduction system

http://aseriesmodifications.wordpress.com/

the guide boss is "one" of the MAIN bottle necks, sir yun

Cheers Vegard & Benross :)