Muncie wrote: Mon Jan 12, 2026 12:12 am
I only got as far as a Paris Hilton tune "rich and retarded" I tried copying over L67 timing tables it didn't perform that well at all absolutely asthmatic compared to stock with timing pulled under boost I might revisit again as this was over 13 months ago now im more comfortable with tunerpro and things in general.
I used The L67 Cam i just found christmas a shit time to build an engine as i intended to do a cam, went with Double row chain setup from Mace (set to Stock but is adjustable) ZZP Tensioner and Mace lifters. Pushrods and Springs are New old stock, I'm not going for Records quick and reliable street car will do that can handle a a bit of time at drag strip occasionally i don't even do Burnouts (lame i know) unless im at the track.
I just want to be able to hang with the V8s and it was doing that on 7psi.
I Scored the Block already machined with new pistons 30 over for 1500 bucks and did ARP in Bottom end ARP head studs MLS Head gaskets i ported the Heads myself More of a port tidy up blended the Valve stem protrusion a bit and reduced its height, spent more time on exhaust then inlet side.
Believe it or not but the ecotec and L67 use the same cam, the only difference that I know off is the L67 used a different timing set that advanced the cam timing 6°. The earlier intake valve closure helps compensate with the lower CR when off boost and then the different converter to make it behave like ecotec when off boost.
immortality wrote: Mon Jan 12, 2026 1:31 am
Believe it or not but the ecotec and L67 use the same cam, the only difference that I know off is the L67 used a different timing set that advanced the cam timing 6°. The earlier intake valve closure helps compensate with the lower CR when off boost and then the different converter to make it behave like ecotec when off boost.
Advanced 2 degrees. Same converter just flashes higher due to more torque
Rhysk94 wrote: Mon Jan 12, 2026 12:15 am
How much boost, what timing ?
I was running 6 psi to start with on untouched timing i pulled 6 degrees out turned it up to 10psi and it lasted a while. I just subtracted a lump from everything over 2500rpm watching the timing on dash till it just commanded around the figure I was after.
As I say learning....... and over eager to drive it.
Ive got help over here (nz) now to get it dialed in and access to a dyno so once im happy to put turbo back on ill get it done with a bit of help from people that know what they're doing.
Rhysk94 wrote: Mon Jan 12, 2026 12:15 am
How much boost, what timing ?
I was running 6 psi to start with on untouched timing i pulled 6 degrees out turned it up to 10psi and it lasted a while. I just subtracted a lump from everything over 2500rpm watching the timing on dash till it just commanded around the figure I was after.
As I say learning....... and over eager to drive it.
Ive got help over here (nz) now to get it dialed in and access to a dyno so once im happy to put turbo back on ill get it done with a bit of help from people that know what they're doing.
immortality wrote: Mon Jan 12, 2026 1:31 am
Believe it or not but the ecotec and L67 use the same cam, the only difference that I know off is the L67 used a different timing set that advanced the cam timing 6°. The earlier intake valve closure helps compensate with the lower CR when off boost and then the different converter to make it behave like ecotec when off boost.
Advanced 2 degrees. Same converter just flashes higher due to more torque
Doing some more research, It turns out Holden changed converter specs from VX onward. Before VX the ecotec had a tighter converter than the L67, from VX onward they have the same converter but it's the ecotec that then has the same looser converter as the L67.
Rhysk94 wrote: Mon Jan 12, 2026 12:15 am
How much boost, what timing ?
I was running 6 psi to start with on untouched timing i pulled 6 degrees out turned it up to 10psi and it lasted a while. I just subtracted a lump from everything over 2500rpm watching the timing on dash till it just commanded around the figure I was after.
As I say learning....... and over eager to drive it.
Ive got help over here (nz) now to get it dialed in and access to a dyno so once im happy to put turbo back on ill get it done with a bit of help from people that know what they're doing.
