Where's best for porting cossie heads ??
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17-12-2008, 10:51 AM
#12
As per his website:
An ex Brian Hart R&D Formula One employee for over 20 years, working on such projects as the Jordan, Arrows and Minardi Formula One engines, as well as the RS 200 Rally Car engine and the Ford BDA Works engines and cylinder heads. Many of the years that Neil spent in Formula One was developing port and swirl technology.
17-12-2008, 11:10 AM
#14
PassionFord Post Whore!!
17-12-2008, 11:14 AM
#15
Happily retired
17-12-2008, 11:25 AM
#16
Neil's head though, dont fall into that category, he does what works not what looks good like some folk do.
The port on my head from Neil, some would consider mild as its not massive holes, but its the shape that matters not the size (well so girls keep telling me)
17-12-2008, 11:29 AM
#17
PassionFord Post Whore!!
17-12-2008, 11:31 AM
#18
At the people saying that their head "looks good"
Most folk cant tell by looking what is a good job or not, I know Im certainly not able to do so.
Whacking your fingers in helps if you know what to feel for, but even then I wouldnt be able to tell the difference between a good head and a brilliant one personally as I dont have enough experience.
So Rod's point is go by what the results are like, not by what unqualified people on the internet "think" they "look like" they "should do" when put on a car.
Valid point IMHO!
Most folk cant tell by looking what is a good job or not, I know Im certainly not able to do so.
Whacking your fingers in helps if you know what to feel for, but even then I wouldnt be able to tell the difference between a good head and a brilliant one personally as I dont have enough experience.
So Rod's point is go by what the results are like, not by what unqualified people on the internet "think" they "look like" they "should do" when put on a car.
Valid point IMHO!
hence why i said i have never heard of cnc who done mine but it looks good 
17-12-2008, 12:03 PM
#23
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Cylinder head work is a serious work of art and requires SERIOUS experience. Anyone can go wild with port sizes and cams however usually you'll find that flow is only very good in one aspect and comprimised elsewhere where it equally as important. To get the right package for what type of flow you want you need to speak to someone with seriously experience. As my good ol friend Rod stated anyone can make a head look good ie. nicely polished away with massive port faces however what the rest beyond the port face is like has a great deal to do with the overall flow. You wouldnt believe the amount of research development and time we chucked into aiding the design of my old Zetec head with Jim Garrard (who has now decided to do a legger to Switerzland)......gosh was that guy clued up on this topic or what (hence he gets my vote), second would be Dave Smith however I believe he doesnt do the work anymore and has passed it onto his son.
17-12-2008, 12:10 PM
#24
The one and only! 
My YBP head was ported by Nick and performs amazingly well in all regards. I'm sure Neil and Nick will know each other VERY well .
The inlet throats are easy, but you wouldn't believe the exhaust ports I have seen from many alleged top machining places
! The problem with the Cossie head is that these ports are at an obtuse angle, so on poorly machined heads, they are still the standard size where the machines have difficulty in getting at . So they look good from the outside, but flow extremely poorly because of the hidden restriction .
For an example of a poor head, do a search for Paul V - Nick put this right for him.
My YBP head was ported by Nick and performs amazingly well in all regards
. I'm sure Neil and Nick will know each other VERY well .The inlet throats are easy, but you wouldn't believe the exhaust ports I have seen from many alleged top machining places
! The problem with the Cossie head is that these ports are at an obtuse angle, so on poorly machined heads, they are still the standard size where the machines have difficulty in getting at . So they look good from the outside, but flow extremely poorly because of the hidden restriction .For an example of a poor head, do a search for Paul V - Nick put this right for him
.
17-12-2008, 12:22 PM
#25
PassionFord Post Whore!!
The one and only!
My YBP head was ported by Nick and performs amazingly well in all regards. I'm sure Neil and Nick will know each other VERY well .
The inlet throats are easy, but you wouldn't believe the exhaust ports I have seen from many alleged top machining places! The problem with the Cossie head is that these ports are at an obtuse angle, so on poorly machined heads, they are still the standard size where the machines have difficulty in getting at . So they look good from the outside, but flow extremely poorly because of the hidden restriction .
For an example of a poor head, do a search for Paul V - Nick put this right for him.
My YBP head was ported by Nick and performs amazingly well in all regards
. I'm sure Neil and Nick will know each other VERY well .The inlet throats are easy, but you wouldn't believe the exhaust ports I have seen from many alleged top machining places
! The problem with the Cossie head is that these ports are at an obtuse angle, so on poorly machined heads, they are still the standard size where the machines have difficulty in getting at . So they look good from the outside, but flow extremely poorly because of the hidden restriction .For an example of a poor head, do a search for Paul V - Nick put this right for him
.
17-12-2008, 04:14 PM
#28
To be fair, Doug's new NMS head seems to work just as well though.
The inlet throats are easy, but you wouldn't believe the exhaust ports I have seen from many alleged top machining places ! The problem with the Cossie head is that these ports are at an obtuse angle, so on poorly machined heads, they are still the standard size where the machines have difficulty in getting at . So they look good from the outside, but flow extremely poorly because of the hidden restriction .
For an example of a poor head, do a search for Paul V - Nick put this right for him.
! The problem with the Cossie head is that these ports are at an obtuse angle, so on poorly machined heads, they are still the standard size where the machines have difficulty in getting at . So they look good from the outside, but flow extremely poorly because of the hidden restriction .For an example of a poor head, do a search for Paul V - Nick put this right for him
.
17-12-2008, 04:22 PM
#29
PassionFord Post Whore!!
17-12-2008, 04:49 PM
#31
PassionFord Post Whore!!
17-12-2008, 05:03 PM
#32
10K+ Poster!!
They both started working at the same place together many moons ago
Not that hard to get hold of anymore if you know where to look
17-12-2008, 05:19 PM
#34
10K+ Poster!!
Price to look at it, breathe on it a little or a full blown works head, the prices change massively.
I was offered a xe head Nick did for someone which was about twice what it cost me to get done elsewhere, I'll admit I haven't used as good quality components as that head had nor do I expect the porting to be of a similar standard, I do know its proven for what I need though.
You get what you pay for, I know plenty of people who have got the results using his stuff so if I was building a serious engine and I had the confidence it wasn't likely to grenade itself at some point I'd use him but I couldn't afford to risk having to shell out that sort of cash twice so I done things my own way which tbh most Vauxhall owners seem to do a lot.
17-12-2008, 05:27 PM
#35
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17-12-2008, 07:37 PM
#38
[QUOTE=JonnyBravo;3810667]They both started working at the same place together many moons ago
Not quite correct, Neil started full time in the late 70's (there is even picture in the book given to employees, of him wearing flares and a mullet hair style) and was there to the end.
I believe Nick worked there early 90's and left before the end.
Both do good work.
Steve
Not quite correct, Neil started full time in the late 70's (there is even picture in the book given to employees, of him wearing flares and a mullet hair style) and was there to the end.
I believe Nick worked there early 90's and left before the end.
Both do good work.
Steve
17-12-2008, 08:05 PM
#39
Testing the future
