Friday, January 19, 2007

On Cloud 9!

The SP was recently dynoed by it's new owner at GT Auto. Engine spec and tune is exactly the same as when I sold it cept for a Koyo aluminium radiator fitted a couple days before the dyno. I'll let the dyno chart below tell you how pleased I am with the results. Absolutely fab and worth all the BST thru the years!
If you're having difficulty with the maths this translates to more than 180ps at the crank once you factor in transmission loss. At least 5 more ps can be liberated by fine tuning the A/F ratio. As you can see the mapping's too rich from 4000+ rpm onwards. I would also tweak the cam lobe separation settings for more torque. Pls note that this engine is still running on hydraulic lifters. Cylinder head is standard fully ported 4G93T RS. Engine is Naturally Aspirated. No MIVEC or Snail cheating here. For comparison sake, a stock B16A big VTEC will dyno around 140-145ps. A B18C Spec R will dyno around 160ps. A stock 4G93P will dyno around 110ps or less.
The new owner has lotsa mods planned to take the SP to the next level. Most importantly he also has the budget I don't have.