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i went the .82 exhaust on my rb25 and i love it. Lag is basically non existant through gear changes. full boost before 4,000rpm and strong power all the way to 7200. The .63 will be more responsive yes, but by how big a margin? Id much rather a fatter mid range and top end than be super responsive and flatten out from high mid to top. but all depends on what you want out of the setup.

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You stick a bung in the turbo intake and pump it full of air man

What he said, my turbo inlet is 4 inch. So I went to bunnings got a 100mm PVC pipe end cap and about 3 inches of 100 mm pipe. Glued them together wile I was there ^^" ... Then drilled a hole and epoxied an air line hose fitting in the end cap. It was a tight fit into the front silicone but it goes on... Used a hose clamp!!! Lol... Then set the reg on the compressor to like 5 psi first. Plug it in and u can hear leaks right away.

No other blocking of anything

Edited by DriftSquad

yeah its weird how that works.. you would think the air would just go through the valves and out the exhaust but you can get some pressure in there... i got 25psi into mine.

Aparently beanies can lead to internal bearing damage if left on and raced with. No idea how. Hpc coating increases thermal efficiency in the turbo which leads to better response. Plus if you hpc coat it silver the chicks will flock... hard. But in all seriousness when I do go a steampipe manifold ill be hpc coating the manifold and turbo housing. Looks good, doesn't get that rusted look from heat, serves a purpose.

Edited by LTHLRB

Aparently beanies can lead to internal bearing damage if left on and raced with. No idea how. Hpc coating increases thermal efficiency in the turbo which leads to better response. Plus if you hpc coat it silver the chicks will flock... hard. But in all seriousness when I do go a steampipe manifold ill be hpc coating the manifold and turbo housing. Looks good, doesn't get that rusted look from heat, serves a purpose.

I saw 900 degree manifold temps regularly at the track, all with a beanie on. The car has done 6 hard track days and daily driving for many years without issue.

As long as the CHRA is water cooled you should be fine.

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