OST-070: 7AGE for an N2 Levin

[oldeskewltoy]

(09-12-2020 09:16 PM)Vaptor Wrote:  Love the details

As I am going to use a TVS supercharger 900 or 1320 on my build, with High Lift cams, I was commended to go with 38mm (37mm) Exhaust port.
Do you perhaps know if the 38mm gasket is a 1:1 copy of an TODA gasket?

Just to compare what the local tuner recommends compared to your work, What diameter did you get the new bovls machined to?

I think I read somewhere, that you use some old SR20 valves, when doing the chambers, is this correct? Is there a certain size valve that you use, or is it the same size, as the oversize 4age valves IN32mm EX28mm?

Oversize valve work, is new to me. so hope that I can drain you for some knowledge

1) copy of Toda - nope... ours is "better" ... because we took into account the gasket drop, so we adjusted ours .020" (bolt holes down, or if you prefer ports up)

2) the bowl/seat diameter (32mm/27.5mm) will be different depending on how much lift you are running.... under .350" lift - keep seat/bowl to 85%, over .400" lift - 88%

I have used other valves to protect seats when I've done the chamber work in the past - when I have machined seat to protect, in this case the seats haven't been cut, so I didn't need to protect them.


the pistons finally arrived....




more to come.....