Mixing Rocker Ratios In One Motor

Zak · October 25th, 2006, 09:21 PM

I noticed some people mix 1.6 with 1.7 ratio roller rockers.. actually Summit carries a set of TrickFlow rockers that is mixed.

I'm pretty sure they use those rockers with single pattern cams such as E303 or Steeda-19 in order to increase the lift of certain valves..

my question is which ones? INTAKE or EXHAUST should have more lift? Let's say for Forced Induction application, particularly.

This must be a CAM-101 thing for the pro's.

Zak · October 26th, 2006, 08:56 AM

Come on.. I can't believe nobdoy knows the answer!

I lean towards having more intake lift..

I need somebody's blessings.

1slo5.0 · October 26th, 2006, 01:37 PM

That is all dependent upon what the engine needs and/or what the head flow numbers are. Commonly people tend to put the 1.7s on the exhaust to increase exhaust lift. That is not always the best thing. For example, the cam I had ground for my engine has more lift on the intake side.

October 25th, 2006, 09:21 PM	#1
Zak Regular Join Date: May 2006 Posts: 253	Mixing Rocker Ratios In One Motor I noticed some people mix 1.6 with 1.7 ratio roller rockers.. actually Summit carries a set of TrickFlow rockers that is mixed. I'm pretty sure they use those rockers with single pattern cams such as E303 or Steeda-19 in order to increase the lift of certain valves.. my question is which ones? INTAKE or EXHAUST should have more lift? Let's say for Forced Induction application, particularly. This must be a CAM-101 thing for the pro's.

October 26th, 2006, 01:37 PM	#3
1slo5.0 Zippee is my step sister. 1990 Mustang LX 9.36@143 mph Join Date: Jan 2006 Location: Fond du Lac, Wisconsin Posts: 10,353	That is all dependent upon what the engine needs and/or what the head flow numbers are. Commonly people tend to put the 1.7s on the exhaust to increase exhaust lift. That is not always the best thing. For example, the cam I had ground for my engine has more lift on the intake side. __________________ Thanks to: Trick Flow, Team Z Motorsports, Total Engine Airflow and Furo Racecraft My daily driver has 16 cylinders and 4400hp @ 1000 rpm....

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October 26th, 2006, 08:56 AM	#2
Zak Regular Join Date: May 2006 Posts: 253	Come on.. I can't believe nobdoy knows the answer! I lean towards having more intake lift.. I need somebody's blessings.

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