Cylinder Head Work
- Thread starter henderson
- Start date
Raptor6767
Gold Member
well the higher the standard state of tune, the harder it is to get more out.
Based on a standard figure of 185 roughly, you'd probably see 200-205 with just ITBs, but the real gain comes from the increased area under the torque graph. With cams, I'd expect 210-215. the shape of the graph is entirely dependant on getting the correct induction length. I'm working on a very similar setup to that which we developed at GDI/Omex a few years back, but was never productionised
Based on a standard figure of 185 roughly, you'd probably see 200-205 with just ITBs, but the real gain comes from the increased area under the torque graph. With cams, I'd expect 210-215. the shape of the graph is entirely dependant on getting the correct induction length. I'm working on a very similar setup to that which we developed at GDI/Omex a few years back, but was never productionised
Vickys is running 207bhp in a stripped mk2 with a strong torque curve across the range, that's quick enough to see off most thank you
Mine dyno'd 198bhp before ITBs with cat 402s, but I had both decats and the STD ecu was having difficulty controlling it even with multiple remaps.
It dyno'd 215bhp with ITBs and an exhaust camshaft 4 degrees out of timing, then 220bhp once the timing was rectified but with low compression on one cylinder due to a failing ring. As said above I can't remember my exact torque figure but it was around the 190 mark which I was well impressed with. Pulls like a train midrange now, turbo boys eat your heart out
It dyno'd 215bhp with ITBs and an exhaust camshaft 4 degrees out of timing, then 220bhp once the timing was rectified but with low compression on one cylinder due to a failing ring. As said above I can't remember my exact torque figure but it was around the 190 mark which I was well impressed with. Pulls like a train midrange now, turbo boys eat your heart out
Mine dyno'd 198bhp before ITBs with cat 402s, but I had both decats and the STD ecu was having difficulty controlling it even with multiple remaps.
It dyno'd 215bhp with ITBs and an exhaust camshaft 4 degrees out of timing, then 220bhp once the timing was rectified but with low compression on one cylinder due to a failing ring. As said above I can't remember my exact torque figure but it was around the 190 mark which I was well impressed with. Pulls like a train midrange now, turbo boys eat your heart out
slighlty off topic - but is that what caused your engine to go?
Mine dyno'd 198bhp before ITBs with cat 402s, but I had both decats and the STD ecu was having difficulty controlling it even with multiple remaps.
It dyno'd 215bhp with ITBs and an exhaust camshaft 4 degrees out of timing, then 220bhp once the timing was rectified but with low compression on one cylinder due to a failing ring. As said above I can't remember my exact torque figure but it was around the 190 mark which I was well impressed with. Pulls like a train midrange now, turbo boys eat your heart out
thats impressive ben,what sort of price are ITB's then? don't no alot about them...
The piston wall itself broke away between the two compression rings, I'll take a picture of it later. Something to do with euro 5 emissions and the spacing between the rings makes them weaker than a mk2 model, so Matt explained.
I have forged high comp items in place which have deeper valve pockets to allow cat 403s to be run on VVT delete with vernier pulleys. Once it's run in and setup I'll post up results. We're aiming for 230bhp+ mark.
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