430-435 CHP now.....What can I do to get 500-510 CHP? - Page 5 - ZR-1 Net Registry Forums

32valvesftw · 06-25-2016

In the big scheme of things you may actually save time by pulling the engine, as your access for porting would be much better and it will be easier to deal with the grinding dust and chips.

Top Toy · 06-25-2016

Head porting generally includes opening up both the intake and exhaust runners as well as unshrouding the valves in the combustion chamber, all of which require removal of the engine to get the heads off. If you're careful not to allow any metal bits to fall into the valve pockets, you can match the IH and head ports without removing the heads, but the benefit from that mod alone is pretty small.

06-25-2016	#41
32valvesftw Join Date: Jun 2015 Location: Texas Posts: 530	Re: 430-435 CHP now.....What can I do to get 500-510 CHP? In the big scheme of things you may actually save time by pulling the engine, as your access for porting would be much better and it will be easier to deal with the grinding dust and chips.

06-25-2016	#42
Top Toy Join Date: Jul 2012 Location: Allentown, PA Posts: 309	Re: 430-435 CHP now.....What can I do to get 500-510 CHP? Head porting generally includes opening up both the intake and exhaust runners as well as unshrouding the valves in the combustion chamber, all of which require removal of the engine to get the heads off. If you're careful not to allow any metal bits to fall into the valve pockets, you can match the IH and head ports without removing the heads, but the benefit from that mod alone is pretty small. __________________ '95 ZR-1, aqua/gray, #167 368 LPE/Haibeck, Web cams, Stainless Works headers, B&B Fusion exhaust, 18" Fikse wheels, Alcon brakes, lowered. 491 SAE RWHP.