This is the first results from my 382 YSi.
382 ci, Custom Ross pistons 8.7:1 CR, Edelbrock CNC'd 215cc heads, 224/230 on 115LSA cam, 1.7 YT rockers.
Stock LS6 intake and TB.
Custom YSi bracketry + 12 rib drive ( belt wrap isnt great though, but its working great so far )
It was making 15psi at 6000rpm, through a DIY built intercooler
These runs were in approx 93 degF ambient temps, with charge temps around 104 max
97 RON pump fuel only ( should be equivalent to your U.S. 93 PON fuel )
This is on a Dynapack hub dyno. I did have some issues getting a smooth run, as around 4500rpm, the dyno had a habit of going daft, possibly due to the torque, and my Torsen diff doing strange things ??? This run was with less timing, which produced a smooth curve with no problems.
It was like the diff was cycling drive left to right etc causing the dyno to go nuts.
It was a Dynapack 3000, which units are rated at around 400hp each
Runs were in 5th gear, as 4th exceeded the dyno's torque ratings.
AFR's were pretty consitent 11.0-11.5 throughout at WOT
I'll be adding a carb intake soon, and a Snow kit, so hopefully things will improve.
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