Quote:
Originally Posted by Meph
heres something I found relating to toyota ttv-i, on the intake cam
Now it seems as though intake advancing the intake and increasing overlap produce an improvement in MPG in low to medium cruising, the opposite as what many have been thinking. Ill look for more information to back this up |
Thats basiclly same as honda , only honda has 2 cam lobs for low speeds and high loads over like 5k rpm .
They raise intake timing to increase overlap and EGR affect to help with lower temps (they probably raise ignition timing and lean out too) at part throttle low-mid loads .
The problem you will run into is this is only good at one area , it would be bad to do it across the board and why OEM don't use it unless they have VVT .
I still say slightly lower overlap like you did on exhaust is best compromise with turbo , your only really tweaking the timing, any more will hurt in other parts of powerband .
Like trying to advance intake a lot for good low rpm/part throttle would give bad idle, very rough sluggish off the line .