Frayz's V7 Prodrive Edition Impreza STi - "The Bomber"

[frayz]

So today saw another few little bits towards the build.

I managed to grab some time today to get my big end bearings fitted up in my rods and measured the big end bearings with the liners installed. From here i can measure my crank and work out the running clearances. Unfortunately we're still waiting on my crank from Mark @ Lateral Performance. Once i have the crank, things can really start to move forward.

Another thing ive been hunting high and low for recently is a genuine JDM long runner Spec C intake manifold. These are like rocking horse ****e, and if you are lucky enough to find one, generally people are not willing to sell them.

Here you can see the long runners on the Spec C intake that are much smoother and cleaner than one with TGVs. There are one or two marks on it so im going to either paint it or have it powdercoated, but overall im really chuffed at finding one of these.




So all in, and apart from me being absolutely skinted by the whole project...



its coming together nicely.

[frayz]

Heres what 4 hours with a die grinder on a manifold looks like.

Absolutely **** job to do. Its messy and awkward. Ive removed a few lugs that i wont need and have removed practically every casting mark i can get to. I also cleaned the sharp edges where the manifold runners are cast. This will provide a smooth area for the inlet hose to run along.

Now for some bead blasting, Nitro Moors and then a fresh coat of paint

[frayz]

Manifold mid prep now. 99% of the original paint gone, i'll bead blast it tomorrow and then prep for paint when it turns up.

If only i had the time and inclination to polish it lol

[Nik]

Cracking job mate. Deffinately a labour of love. I don't think I would have the inclination or dedication to go through all that

[peter 300]

Looking good mate :-D :-D :-D

[Stuart]

A fantastic dedication to the task Frayz, well done mate. Bit of luck you're in no rush though eh?

Other than looking cool, what is the benefit of the headers mate? More torque?

[frayz]

You mean the manifold Stu?

Whats wrong with my stock manifold your thinking?

Well essentially... nothing. However, all the newage STI's (with exception of the later JDM V8s) came with TGV's (Tumbler generator valves). These are a set of risers that sit in between the manifold and the head.
As their name suggests they have a butterfly valve that sits in them that is controlled by the ECU to close in varying degrees during startup and low throttle angles in order to tumble the intake charge into the cylinders. This is designed to help with emissions. However due to their design they can become a restriction when going for big bhp but more to the point they are a cumbersome item, and generally add to the mess that is a subaru engine lol.

Almost all of the big stock location turbochargers have a larger 3" inlet as opposed to the stock 2.4" item. This means the use of a big bore inlet pipe to feed the turbo. The TGV's just add to this tight squeeze in getting it all in so deleteing the TGVs is a worthwhile idea.

Some people remove the motors and guts from the stock TGVs and weld up the holes that remain.

Here is a pic of a deleted setup


But i wanted a cleaner job than that. So the only answer was a Spec C intake manifold.

If you look at my new manifold you can see the long runners on the Spec C intake that are much smoother and cleaner than one with TGVs.

So in short, no TGVs, less restriction, better flow, nicer package, cleaner setup.

Hope that helps my young Jedi

[Stuart]

You'da man :notworthy:

Thanks for the education

[frayz]

No worries

[duncan]

or you could have read my project thread when i did this :whistle: