Harvey trick or rcm Venturi
 

Which will be best for 650-750 bhp 2.35? Got the Harvey on at the minute running 400 but still have the Venturi that came with the headers

The JC Racing Club Time Attack car runs 750bhp with a RCM Mani and Harvey Trick Up-Pipe. On their turbo which is an OD special GT35 M-spec, on race fuel and with his engine mods he is at 2 bar by 3000rpm!

That sounds perfect as I’m using the same Owens turbo that was ran on the time attack winning car. Thanks for the info it’s greatly appreciated