Got this from NMS today!
Gas flowed for more response and flow, Bronze Guides, Custom Stainless Valves, Seats Cut, Valves hand Lapped in, Diamond Faced. £647.










__________________

 

Hope your gonna fit a new cam to take advantage of the work?

 

I'll be fitting a Newmans with solids soon, but for now standard Ford.

 

looking real pretty

 

Out of interest, what was the turn around time?

 

About a month mate.

 

so what is this type of head ? stage 3

how much for the best head he does ?

and how come you did not go for the best ?

 

Nice.

 

Awesome pictures!
Did you get the actual flow figures from NMS after the gas flowing?
I would be interested to see how the UK porters do compared with
my Canadian porter.

cheers

 

Hi karlos!
Was your intake manifold there too be matched with head?

 

It's a 'Stage 2/3' stage 2 would not normally have bronze guides or stainless valves (from NMS anyway), but I specified it.
The stage 3 head would have bigger valves and larger porting again! I did not choose this as for the power I'm aiming for I would actually lose performance (response and bhp) due to a drop in gas velocity through having the bigger ports and valves. Not sure on a price mate.

Cheers Benni

No I didnt but it would of been interesting had I thought about it

No it wasnt.

 

Lovely looking bit of work! Hope it goes well on the car an you get what your aiming for mate

 

nice

 

Things may have changed, but Karl stopped using flowbenches for individual heads a long time ago as the figures are pretty meaningless in practise.

Karlos - this is a bigger spec than you were going for initially isn't it?

I'm going to have to get my NMS big valver reconned then it'll be up for sale.

 

Karlos had said:

"Got this from NMS today!
Gas flowed for more response and flow, Bronze Guides, Custom Stainless Valves, Seats Cut, Valves hand Lapped in, Diamond Faced. £647. "

A gas flowed cylinder head has been on a flow bench, as one cannot gas flow a cylinder head without one. (Well that is what you are paying for) I was hoping that Karlos would be kind enough to find out what the gas flow results were.

As far as flow testing being meaninless I beg to differ. Every F1 engine development program, every Nascar development team spend vast amounts of time and effort with flow benches to develop the most efficient port. Sure they have the latest flow benches, with swirl meters, tumble meters, wet flowing etc.. However, developing a port without a flowbench to test the results for port velocities, maximizing quality airflow around the valve
is not possible. The CVH port has a very odd swirl inducing shape, and it is very important to understand what is happening to the airflow in the port - cannot be done by guessing.
I also dont think any small shops use computational fluid dynamics software to aid in port development as this is far more costly than a $12,000.00 flow bench.

 

flow bench or not his handiwork is pretty good considering he is getting results of reliable 300 plus bhp out of a 1.6 cvh

 

I agree - the NMS handiwork looks fantastic!

Getting 300+ HP is fantastic too. Karl may not do individual flow testing on the CVH, but I would bet did the port shaping developments with a flow bench.

If someone says they had thier heads gas flowed - means just that - flow testing, and with testing comes results. Am I wrong?

I am having a cylinder head developed here in Canada, where there is no previous port work done on a CVH head. That is why I am looking for comparisons in the UK.
NMS does fantastic work, and I would like to see how my Canadian cylinder head specialist compares. There is certainly no slagging what Karl does - more admiration!

 

Aiming for 200-220bhp depending on what my metering unit can fuel for.

I dont know if he used a flow bench but the spec in my first post is copied word for word from my invoice.

As for the final spec.....I told Ollie what i wanted from the head and my target BHP etc. and what you see above is what they recommended.
Although the price went from £350 to £650 for various reasons, including Ollie forgetting to quote for valves when he first gave me the price, and my original head having 3 cracks in it

 

Hi Karlos,

Great project!

If indeed your invoice stated "gas flowed", then NMS would have head the head on a flow bench. You cannot gas flow a head by looking at it. If they did not flow test your particular cylinder head, I would ask why not - as you have paid for it to be done.

Cheers

 

I thing maybe Karlos used the term Gas flowed in a more genric context. Karl did used to use flowbench's from when he worked at Jaguar to test different designs, but he then didn't use a bench to port individual heads - although this may have changed.

I agree about development if you do have a full on bench and fluid dynamics software, but for a tuner that isn't viable in the majority of cases.

Just look at the cncheads website, it says the Zetec head flows more than a YB head as std, yet we know in practise which engine will put out significantly more power on it's std head. It just isn't viable for non oem's to simulate pressurised turbulent flow.

Rick.

 

Rick,

Without a flow bench there is no way you can port a head properly. How can you determine where the air flows through the port? They are an essential development tool. You can not only measure flow but map port velocities and measure swirl and tumble.

I agree with the canadian guy. Every ported head should have final checks on a flow bench. As you probably know, flow can be affected by the smallest details. Even if you have already bench developed that head, putting every next one on the bench is surely just good quality assurance. What if the ports do not all flow the same due to a minor detail?

As for pressurised flow, if you look into FD you will find that air does not flow significantly different until your reach very silly pressures.

 

looks awsome matemy new nms head is just being fittedto go with my cossie management,t34,newman cam kit,steel low comp new bottom end etc etc.to also go with my empty bank account but they do say you pay for what you get so can`t wait to drive it again lol

 

lovely head but could he have not spent a couple of more minutes and cleaned around the spark plug area to make it look new like the rest of it? or would that have cost you alot more?

 

lol Yeah it would of been nice wouldnt it!

 

NICE
lets hope the figures you are after will be reached i think it will be a bit more than you expect been watching your threads on your motor with intrest just hope the metering head fuels well for the bhp
mark2

 

Thanks mate!
Yeah that will be my limiting factor, hopefully I will be going EFI with standalone management by the end of the year so that will solve any fuelling restrictions!
But for now it's down to the good old metering unit!

Unless something breaks in the next few days i'll be booking myself in at APT for a tune up week starting 17th as i'm off work all that week, so we will soon see how the old girl does! lol

 

very nice head that like!

 

hi
wheres apt and what day and time you going as i might i say might pop down from london with the old digital camera video equiped , might make a good thread if i am free or is it only you bitting your nails in the waiting room
mark2

 

It's in Norwich mate, yes your welcome to come if you want to make the trip, probably almost 3 hours from central London though!!!
I'm booking it tomorrow so will know exact time/date then!

 

Well it's booked for June 6th, thats the earliest they could fit me in they are really busy!!!

 

can you post some pics mate

what stage head is yours ?

would like to see pics for a comparison to karlos's head

how much you wanting when its finished ?

 

hi
well its booked in thats the main thing
was hoping it was durring the week from the 18/19th may as going sea fishing your way overnight
you gotta ask if you can video the power runs would be great to see
mark2

 

nice one karlos looks spot on cant wait to see what power it makes and how it makes the power.

 

Yeah it's a twat i've got to wait a month but they are really busy, literally no slots available until first week of June!! Yes I will try and Video it, my last setup at TOTD is in the link in my Sig!

Cheers! Cant wait myself mate!

 

 

nice head, you sure there bronze guides they look original iron the bronze guides i have are a bronze gold in colour

 

i read at the top that you will be fitting solid lifters to your engine soon. have you had any experience with them before? i have heard that they can make the cvh sound like a bag of very loud broken spanners?? i ask because i seized two hydraulic lifters recently but was put off getting solids. whats the advantage of solids?

 

Yup they are Bronze, and are gold in colour but you can barely see them in those photo's because they are flush with the port wall!

Fitted them the other week mate, easy job, takes a little time though, and no the engine does not sound like a bag of spanners! LOL

See my other thread here:
https://passionford.com/forum/ford-e...-few-tips.html

 

What did it make on the dyno in the end mate?

Rob,

 

Not been on the dyno yet, clutch is slipping over 16/17psi so upgrading in a couple of weeks,finishing the mapping, then eventually see what it makes! lol