Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Disabling intake and exhaust valves (going to 8 valves in a 16-v head)

Gasoline Fumes · 02-24-2013, 04:06 PM

My D15B2 engine has a downdraft DPFI (TBI). And my cam wasn't engineered for this either. I find it hard to believe the 2 exhaust valves can make such a difference compared to my setup. I've had a lot less pinging after my valve delete. You might want to recheck your clearances or at least do a compression check. I was told by "experts" that I couldn't do this. Maybe your ECU doesn't like it?

Did you recheck the clearances after tightening the locknuts?

02-24-2013, 04:06 PM	#66 (permalink)
Gasoline Fumes Too many cars Join Date: Oct 2009 Location: New York State Posts: 1,570 CRXFi - '88 Honda CRX XFi Insight 256 - '00 Honda Insight Team Honda Gen-1 Insights Insight 5342 (no IMA) - '00 Honda Insight Team Honda Gen-1 Insights 90 day: 66.3 mpg (US) Thanks: 1,324 Thanked 786 Times in 468 Posts	My D15B2 engine has a downdraft DPFI (TBI). And my cam wasn't engineered for this either. I find it hard to believe the 2 exhaust valves can make such a difference compared to my setup. I've had a lot less pinging after my valve delete. You might want to recheck your clearances or at least do a compression check. I was told by "experts" that I couldn't do this. Maybe your ECU doesn't like it? Did you recheck the clearances after tightening the locknuts? __________________ 2000 Honda Insight 2000 Honda Insight 2000 Honda Insight 2006 Honda Insight (parts car) 1988 Honda CRXFi 1994 Geo Metro