Dave,

On AJC's 16i, we built a 1620cc CVH with big valve head, double valve springs, massive ports with matched manifolds and gaskets, Cossie throttle bodyNewman cam with solid lifters, T34 with 3" diameter exhaust, Omex 600 management with 55lb injectors and an air to air injector peaking 34 psi and holding 29. The injectors are 10% off reaching the reliable limit of duration so the engine is shifting quite a lot of air.

On the Pro cooler, we saw figures of 28 degrees cruising and 60 degrees on boost. On the GRS, most we saw is 14 cruising and 20 on boost,

I'll let you make the desicion!

Don't know if you've seen the thread about it....

https://passionford.com/forum/restorations-rebuilds-and-projects/184596-rs1600i-turbo-to-be-reborn.html