Matt Wills said:
After weeks and weeks of work and trials which have turned into months, the most cost efficient mod has just got that tiny bit better.
After recieving so many orders, i was just physically unable to carry out the work without shutting down the rest of my business and the manifolds had to be done some other way, and i sure as hell didnt trust anybody else to do it as i've never seen comparable quality.
The only step left was CNC manufacture.
It took redesign after redesign to get the CAD drawing spot on, and after that we had to account for all the different batch castings currently on the market as they differ so much. This meant testing on every single incarnation of manifold core from 1999 to present day, including the hallowed 'RS' unit.
After all the work and testing we have come up with a design and process that allows us to turn around manifolds extreemly quickly and efficiently. With the use of CAD design we were able to generate the best blend of matching and blending to yeild the best gains possible. The design has changed and it would be impossible to generate the accuracy by hand without grinding VERY slowly and being an absolute god with cutter control, and even then you would find quite large discrepancies in the work. The design we ended up with was the result of CFD analysis and allowed us to generate a profile that aids flow control greatly. Infact, the actual perfect design requires material to be added to the casting so there are areas which are not touched as they are already 'oversize', and you will see this vary with batch casting used.
Enough of the babbling and more with the pics.
Stock Head face mating flange:
Stock 172 early phs 2
F4R 'RS' component
AWT CNC manifold
Stock 'crushed' gasket (dimentions as installed)
Actual head
As you can see the dimentions of the finished product match exactly, and still retain a 20 thou (0.5mm) step down as i have always advocated.
Plenum to manifold flange:
Stock 172 early phs 2
F4R 'RS' component
Notice the bumps, these are present on runners 1 & 4 and are also present on latter 172's and on 182's.
AWT CNC manifold
Stock plenum - manifold gasket
This one is uncrused, but it reduces in cross section by 0.5mm. Plenum/manifold match is perfect as the step down is generated in the plenum.
Price is near unaffected at £153.5+vat, and is a bargain for the precision and quality presented, considering countless midnight sessions were spent trying to get it spot on.
We have 30 sets in stock so can finally meet demand!
I'm one happy bunny!
If anybody wants to contact, please email me at [email:1nws9sm9]ben@angel-works.co.uk[/email:1nws9sm9] as my PM box is forever getting full when i dont monitor it.
Steve said:
Matt Wills said:Steve said:[quote="Matt Wills"
What, 129lb ft rather than 147? :lol: My 20 year old 1.9 GTI had nearly as much torque (122) and weighed a lot less (-70kg).
0u26s88]
trophy176 said:
Steve said:
