head work [guide] Page 3

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head work [guide] Page 3

Postby crazycage on Sun Dec 27, 2009 11:36 am

has anyone ever done there own porting and had any results from it and i dont mean a little clean up and make it look nice lol
any pic's of the work would be nice. :)



[Link to guide - JamieFRST]
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Re: head work

Postby Excursion on Sun Dec 27, 2009 1:06 pm

Always wanted to, but haven't gopt around to building a flow bench yet.

Don't trust a reply from someone who doesn't own, or doesn't have access to a bench. There's a lot more to it than taking material out of the ports. Taking the Zetec for example, the best results on that head mean extremely little taken from certain areas of the roof, but the best tuners will run some paper over the whole port to make sure the customer thinks they are getting something for their money (they are anyway - but this improves their perception and hides the actual areas that were worked on!).
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Re: head work

Postby crazycage on Sun Dec 27, 2009 2:55 pm

most of the material i have taken out is from the throat and the short side radious ,but i dont have access to a flow bench as yet.
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Re: head work

Postby dangerousdave on Sun Dec 27, 2009 6:18 pm

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Re: head work

Postby Ruishy1 on Sun Dec 27, 2009 7:08 pm

There is a book that gives you lots of info on this, and it also told you how to build your own basic flowbench :)
It went walkies but i read it a fair few times.
Its not all about just high flow rate numbers, you need to take into consideration the speed of the gas, swirl and tumble.

Best bet is get a book, an old head and try it your self mate IMO :)
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Re: head work

Postby crazycage on Sun Dec 27, 2009 7:11 pm

dangerousdave wrote:have you seen this yet mate...??? http://www.turbosport.co.uk/showthread. ... nch-for-24

nope never seen that will have to have a good read tho,im in the middle of building a flow bench pretty much the same as that :D

heres a pic of some of the exhaust ports

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Re: head work

Postby dangerousdave on Sun Dec 27, 2009 7:53 pm

some of his posts are very interesting mate but with a bench like that you would of prob needed to have a reading of the head in standard form as a comparrison..?? looks like you have taken quiet a bit out but looks all good to me mate! :)
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Re: head work

Postby crazycage on Sun Dec 27, 2009 8:46 pm

dangerousdave wrote:some of his posts are very interesting mate but with a bench like that you would of prob needed to have a reading of the head in standard form as a comparrison..?? looks like you have taken quiet a bit out but looks all good to me mate! :)

i have loads of heads mate including a norris cvh a jamsport cvh and a few standard st170 heads and blacktop heads ,the one in the pic's is a practice zetec head :D
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Re: head work

Postby dangerousdave on Sun Dec 27, 2009 8:55 pm

you want me to test the zetec one if i ever get my zt to pissing run!! lol :) ;)
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Re: head work

Postby crazycage on Mon Dec 28, 2009 10:57 pm

flow bench should be finished tomorrow :D bring on some real testing
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Re: head work

Postby dangerousdave on Mon Dec 28, 2009 11:19 pm

sounds good! :) cant wait to hear the results! :)
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Re: head work

Postby crazycage on Tue Dec 29, 2009 10:03 pm

ported out the inlet side today :D what do you lot think ?

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Re: head work

Postby Ruishy1 on Wed Dec 30, 2009 9:22 am

TBH mate, the opinions mean pretty much nill, what do the numbers say :)
oh and how much did your flow bench cost to make ?
the heads on my car flow like s**t, and i want to open them up, i would like to do it myself like you have :aviator:
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Re: head work

Postby crazycage on Wed Dec 30, 2009 11:31 am

Ruishy1 wrote:TBH mate, the opinions mean pretty much nill, what do the numbers say :)
oh and how much did your flow bench cost to make ?
the heads on my car flow like s**t, and i want to open them up, i would like to do it myself like you have :aviator:

tbh my bench has cost me about £8 because me and my my mate had most of what we needed .that head has not been on the bench yet just not had time :cry: ill get it onto the bench before the weekend
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Re: head work

Postby Ruishy1 on Wed Dec 30, 2009 12:06 pm

8 quid :lol:
ive lost more running for a bus :lol:

Id like to build a flow bench, but i would invest a little more cash, get a decent manometer and blower.
BUT i dont have that kinda spare cash just now so il need to get someone else to check my heads once im done :rolleyes:

let us know how you get on :aviator:
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Re: head work

Postby crazycage on Wed Dec 30, 2009 12:30 pm

Ruishy1 wrote:8 quid :lol:
ive lost more running for a bus :lol:

Id like to build a flow bench, but i would invest a little more cash, get a decent manometer and blower.
BUT i dont have that kinda spare cash just now so il need to get someone else to check my heads once im done :rolleyes:

let us know how you get on :aviator:

have a read of this

http://www.gofastnews.com/board/technic ... bench.html
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Re: head work

Postby Ruishy1 on Wed Dec 30, 2009 1:38 pm

some interesting stuff there, id like to build something slightly more proffesional like the one with the digital readout :)
It will be a while before i have a spare 500 quid to throw on something like that though :cry:
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Re: head work

Postby dangerousdave on Wed Dec 30, 2009 1:51 pm

Ruishy1 wrote:some interesting stuff there, id like to build something slightly more proffesional like the one with the digital readout :)
It will be a while before i have a spare 500 quid to throw on something like that though :cry:



500 quid :oooh: :oooh: :oooh: :oooh: my zetec turbos only costing about that!! lol :) :P
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Re: head work

Postby Ruishy1 on Wed Dec 30, 2009 2:15 pm

good to hear mate, budget power all the way :D
How long till your cars ready ?
Im hoping the first incarnation of my engine will only cost me around £1500

Once its running alright i want to invest some cash and build one with the 5.2 stroker kit and a sequential b :D ox, but thats would be years away :lol:
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Re: head work

Postby crazycage on Wed Dec 30, 2009 2:21 pm

Ruishy1 wrote:some interesting stuff there, id like to build something slightly more proffesional like the one with the digital readout :)
It will be a while before i have a spare 500 quid to throw on something like that though :cry:

the digital read it is just a add on to my bench but for now it is more than upto the job.
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Re: head work

Postby Ruishy1 on Wed Dec 30, 2009 2:28 pm

what are you using to read the flow ?
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Re: head work

Postby crazycage on Wed Dec 30, 2009 2:36 pm

Ruishy1 wrote:what are you using to read the flow ?

a manometer :D
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Re: head work

Postby Ruishy1 on Wed Dec 30, 2009 3:46 pm

did you buy it or make it though ?
does it read in cfm ?
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Re: head work

Postby dangerousdave on Wed Dec 30, 2009 4:16 pm

surely antifreeze and a windscreen washer tube or hose pipe would be good enough!! :) if you measure the standard head and mark the flo with a pen then do the same with a ported item you would know a rough % of how well it flows!!???.... what more would you want for under £10? lol
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Re: head work

Postby crazycage on Wed Dec 30, 2009 6:00 pm

Ruishy1 wrote:did you buy it or make it though ?
does it read in cfm ?

i made it its not hard , all your doing is measuring the pressure drop at what ever valve lift then convert to cfm and you would only want a cfm reading to compare to other heads that have been tested that way:D did you not read any of the info on the link
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Re: head work

Postby Ruishy1 on Wed Dec 30, 2009 9:15 pm

i only gave it a quick browse, im in the middle of tracking down a pulley to go on my crank and a tensioner to suit.
Il give it a closer read when i have some spare time
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Re: head work

Postby crazycage on Wed Dec 30, 2009 11:30 pm

some of the inlet ports :D

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Re: head work

Postby scouse-sambo on Thu Dec 31, 2009 12:19 am

Looking good mate.. you should surely see some improvement in flow there.

Have you got the bench up and running yet
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Re: head work

Postby crazycage on Thu Dec 31, 2009 12:36 am

scouse-sambo wrote:Looking good mate.. you should surely see some improvement in flow there.

Have you got the bench up and running yet

yes i just need to make valve opening tool,ive left one inlet and one exhaust port standard to measure and then flow test the other 3 and see if they are all within tolerance, the exhaust ports have been opend up over 5mm as they are tiny :( the inlet has only been ported about 1mm
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Re: head work

Postby scouse-sambo on Thu Dec 31, 2009 12:52 am

I was gunna ask how you wer gunna compare!! but you have just answered it :lol:

if the standard zetec head is good for 350 - 400bhp as you have already proven without even touching it then any gain will be more than sufficient as a "practically free" upgrade.. fingers crossed mate its all good.
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Re: head work

Postby Ruishy1 on Thu Dec 31, 2009 9:01 am

Not ken on the look of those inlet ports mate, afaik it needs to be smooth transitions and there are some sharp changes there.
then again im no expert and just going on stuff i read in a book.
Only testing will tell
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Re: head work

Postby crazycage on Thu Dec 31, 2009 9:40 am

Ruishy1 wrote:Not ken on the look of those inlet ports mate, afaik it needs to be smooth transitions and there are some sharp changes there.
then again im no expert and just going on stuff i read in a book.
Only testing will tell

there is only one sharp edge that still needs a little blending and thats the injector port into the main port,the knife edge seperating the ports should be like that :D .
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Re: head work

Postby crazycage on Thu Dec 31, 2009 9:48 am

scouse-sambo wrote:I was gunna ask how you wer gunna compare!! but you have just answered it :lol:

if the standard zetec head is good for 350 - 400bhp as you have already proven without even touching it then any gain will be more than sufficient as a "practically free" upgrade.. fingers crossed mate its all good.

i would liked to have found the limit of the standard head but i maxed out my injectors then with the time of year i dont use the car that much :( so that was it i started on a few little jobs and ended up porting a head :D 350hp is easy on a blacktop and im sure i would of seen 370ish on the standard head but ill never no for sure .
i just want to max out the turbo next year see how that is and then onto a bigger one :D
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Re: head work

Postby Ruishy1 on Thu Dec 31, 2009 7:40 pm

i know about the separation between the ports is like that mate, i was talking about the injectors port, i thought you had finished.

is there any shrouding on the valves ?
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Re: head work

Postby crazycage on Thu Dec 31, 2009 8:26 pm

Ruishy1 wrote:i know about the separation between the ports is like that mate, i was talking about the injectors port, i thought you had finished.

is there any shrouding on the valves ?

no i havent done any shrouding ,may do a little but not till i have done some flow testing :)
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