Gtr Factory Exhaust Manifold, Turbo Side Porting

[Beer Baron]

Richard, unfortunately I didn't have a camera with me when I picked up the manifolds today and dropped them off to the welder. The cracks were exactly along the welds that you show in the top picture. These are MUCH better than the welds on my Tomei manifolds and as shown in your bottom picture penetrate right through the thickness of the wall to the inside. MINE DON'T

The welder will simply reweld and these and is confident that it will hold. The failure is from expansion/contraction due to heating - it is obvious from the colour change that this is the hottest part of the whole exhaust system here. A little disappointing from Tomei in my opinion.

what a bummer. i have noticed over the years buying the tomei manis and dumps that some were a little better than others. I guess welders sometimes have a bad day... even at tomei!

and you're right, ones like yours that had poor penetration in that area should have been binned. but in japan they probably deduct the material cost from your pay packet or make you commit ritual suicide if you fk one up, so the bloke welding yours either has a bad sake habit and needed the dough, or does not like the idea of committing seppuku on the workshop floor.

[9krpm]

i heard that wrapping the stock manifolds can crack the pipes (or was that only relative to aftermarket pipes?)

It can crack any pipe but more so for aftermarket than the cast stockies.

I have another spare and I am running E85 so it's not that bad.

[Keeper]

That porting of the stock manifolds looks great, wonder why the facotry didn't do it in the first place, these were $160,000 cars... might play around next week while the engine is being assembled

Edited July 8, 2009 by Keeper

[Marko R1]

^ arnold was a legend in his prime bodybuilding days ^

sorry bit off topic - just had to call that 1 out

yeah i also stuck with match ported factory manifolds

[gtr fan]

Sorry to dig up an old thread, but are there any SAU'ers in Sydney who would be willing to port my manifold flanges for a fee?

How many hours work in involved in something like this?