1.6 or 1.7 roller rockers

89lx · June 12th, 2008, 09:43 PM

i plan on going with an E cam, edlebrock heads and Edelbrock Performer 5.0 EFI Intake Manifold upper and lower, i was just wondering what roller rockers you guys think i should go with..

e3sean · June 13th, 2008, 12:19 AM

1.6

91cobra5.0 · June 13th, 2008, 12:40 AM

what kind of performace cn you expect out of rocker arms on a stock engine?

e3sean · June 13th, 2008, 12:45 AM

roller rockers will rev smoother maybe free up a hp or 2 but it will keep friction down so your oil will be a lil cooler. they are good to have but not nessassary

Smirnoff · June 14th, 2008, 04:29 AM

whats the diff. between the 1.6 and 1.7's ?

1slo5.0 · June 14th, 2008, 05:24 AM

Originally Posted by Smirnoff

whats the diff. between the 1.6 and 1.7's ?

More valve lift. The rocker arm ratio is a multiplier for valve lift. Different ratio rocker arms have the push rod cup in different locations to increase or decrease the ratio of lift. The stock 5 liter HO cam is .2775 lobe lift. With a 1.6 rocker the valve lift is .444. With a 1.7 rocker the valve lift is .47175.

Smirnoff · June 14th, 2008, 07:42 AM

Originally Posted by Darrell

More valve lift. The rocker arm ratio is a multiplier for valve lift. Different ratio rocker arms have the push rod cup in different locations to increase or decrease the ratio of lift. The stock 5 liter HO cam is .2775 lobe lift. With a 1.6 rocker the valve lift is .444. With a 1.7 rocker the valve lift is .47175.

O thank you for explaining that. that has confused me for a while

June 12th, 2008, 09:43 PM	#1
89lx Regular 1989 LX coupe 5.0L Join Date: Dec 2007 Location: NS Canada Posts: 496 iTrader: 0 reviews	1.6 or 1.7 roller rockers i plan on going with an E cam, edlebrock heads and Edelbrock Performer 5.0 EFI Intake Manifold upper and lower, i was just wondering what roller rockers you guys think i should go with.. Last edited by 89lx; June 12th, 2008 at 09:47 PM.

June 13th, 2008, 12:19 AM	#2
e3sean I Post Entirely Way Too Much 1988 lx 9.68@142 Join Date: Nov 2007 Location: goldsboro NC Posts: 5,609 iTrader: 0 reviews	1.6 __________________

June 13th, 2008, 12:45 AM	#4
e3sean I Post Entirely Way Too Much 1988 lx 9.68@142 Join Date: Nov 2007 Location: goldsboro NC Posts: 5,609 iTrader: 0 reviews	roller rockers will rev smoother maybe free up a hp or 2 but it will keep friction down so your oil will be a lil cooler. they are good to have but not nessassary __________________

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1.6 or 1.7 roller rockers	This thread	Refback	June 14th, 2008 07:45 AM

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June 13th, 2008, 12:40 AM	#3
91cobra5.0 Hardcore Enthusiast 98 Cobra Join Date: Jan 2008 Location: Bay Area, Ca Posts: 2,057 iTrader: 0 reviews	what kind of performace cn you expect out of rocker arms on a stock engine?

June 14th, 2008, 04:29 AM	#5
Smirnoff Enthusiast 1982 GT t-top no proof of purchase Join Date: May 2008 Location: N.E.PA Posts: 717 iTrader: 0 reviews	whats the diff. between the 1.6 and 1.7's ?

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