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Re: Much (any?) advantage to a higher rocker ratio here? [Re: AndyF] #1321825 10/18/12 10:23 PM 10/18/12 10:23 PM
Joined: Mar 2009 Posts: 1,169 Virginia Beach, VA O Old School super stock
Old School super stock O Joined: Mar 2009 Posts: 1,169 Virginia Beach, VA	i have some 1.7 t&d,s on one of my motors. it,s only a street car. would it be worth it to change out the exhaust rockers to some 1.6,s? i know it would help with the springs and lifters, any other benefit? my cam is a solid roller: 272/276@.050 .609" can you buy just 8 rockers? Last edited by Old School; 10/18/12 10:24 PM. 68 cuda formula S 588" bb 5sp 70 CUDA CONVERT 500" 5SP (SUBLIME) 70 CUDA CONVERT 500" 5SP (PLUMCRAZY):TOO MUCH HORSEPOWER, IS ALMOST ENOUGH!

Re: Much (any?) advantage to a higher rocker ratio here? [Re: BradH] #1321826 10/19/12 12:38 AM 10/19/12 12:38 AM
Joined: Oct 2003 Posts: 3,698 NE Oklahoma V Von master
Von master V Joined: Oct 2003 Posts: 3,698 NE Oklahoma	Quote: Quote: Brad: ... Dwayne: Brad: Dwayne: Brad: Dwayne: Thats funny!! Glad its not just me! 72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72. Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.

Re: Much (any?) advantage to a higher rocker ratio here? [Re: Von] #1321827 10/19/12 02:06 AM 10/19/12 02:06 AM
Joined: Jan 2003 Posts: 3,616 Riverside, Ca G G_bob master
G_bob master G Joined: Jan 2003 Posts: 3,616 Riverside, Ca	Quote: Quote: Quote: Brad: ... Dwayne: Brad: Dwayne: Brad: Dwayne: Thats funny!! Glad its not just me! Hey, I've had that same conversation with Dwayne. I've got 1.7 t&d's on the victor max wedge heads on the coronet. 264/268 @ .050, .630 lift (about .700 with the 1.7's)

Re: Much (any?) advantage to a higher rocker ratio here? [Re: G_bob] #1321828 10/19/12 12:46 PM 10/19/12 12:46 PM
Joined: Jan 2003 Posts: 16,376 D dogdays I Live Here
dogdays I Live Here D Joined: Jan 2003 Posts: 16,376	There's a reason the NASCAR motors are running very high ratio rockers. I don't know what it is, but they are masters of getting the last hp out of an engine. R.

Re: Much (any?) advantage to a higher rocker ratio here? [Re: Old School] #1321829 10/19/12 01:33 PM 10/19/12 01:33 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	can you buy just 8 rockers? Yes you can ... T&D will sell you anything as a single or multiples from the nuts to rockers

Re: Much (any?) advantage to a higher rocker ratio here? [Re: MR_P_BODY] #1321830 10/19/12 03:55 PM 10/19/12 03:55 PM
Joined: Mar 2009 Posts: 1,169 Virginia Beach, VA O Old School super stock
Old School super stock O Joined: Mar 2009 Posts: 1,169 Virginia Beach, VA	Quote: can you buy just 8 rockers? Yes you can ... T&D will sell you anything as a single or multiples from the nuts to rockers thanks mr p body. if i change all of my exhaust rockers, i guess i would help reduce my valve spring and lifter failures by 50%... Last edited by Old School; 10/19/12 03:57 PM. 68 cuda formula S 588" bb 5sp 70 CUDA CONVERT 500" 5SP (SUBLIME) 70 CUDA CONVERT 500" 5SP (PLUMCRAZY):TOO MUCH HORSEPOWER, IS ALMOST ENOUGH!

Re: Much (any?) advantage to a higher rocker ratio here? [Re: Old School] #1321831 10/19/12 04:16 PM 10/19/12 04:16 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	thanks mr p body. if i change all of my exhaust rockers, i guess i would help reduce my valve spring and lifter failures by 50%... Was your cam ordered for 1.5 specs...I have never seen bigger exhaust rockers help make ANY difference in HP

Re: Much (any?) advantage to a higher rocker ratio here? [Re: MR_P_BODY] #1321832 10/19/12 05:47 PM 10/19/12 05:47 PM
Joined: Oct 2007 Posts: 4,213 New York polyspheric master
polyspheric master Joined: Oct 2007 Posts: 4,213 New York	X2 - if it helps, the exhaust lobe was too mild. Boffin Emeritus

Re: Much (any?) advantage to a higher rocker ratio here? [Re: MR_P_BODY] #1321833 10/19/12 08:07 PM 10/19/12 08:07 PM
Joined: Mar 2009 Posts: 1,169 Virginia Beach, VA O Old School super stock
Old School super stock O Joined: Mar 2009 Posts: 1,169 Virginia Beach, VA	Quote: thanks mr p body. if i change all of my exhaust rockers, i guess i would help reduce my valve spring and lifter failures by 50%... Was your cam ordered for 1.5 specs...I have never seen bigger exhaust rockers help make ANY difference in HP it,s an off the shelf cam that indy sells. it,s called their r-1. i dont know what ratio rocker it was speced for 68 cuda formula S 588" bb 5sp 70 CUDA CONVERT 500" 5SP (SUBLIME) 70 CUDA CONVERT 500" 5SP (PLUMCRAZY):TOO MUCH HORSEPOWER, IS ALMOST ENOUGH!

Re: Much (any?) advantage to a higher rocker ratio here? [Re: Old School] #1321834 10/19/12 08:13 PM 10/19/12 08:13 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	it,s an off the shelf cam that indy sells. it,s called their r-1. i dont know what ratio rocker it was speced for Doesnt it say it right on the cam card... normally does (lift with 1.5 rockers)or what ever ratio its designed on EDIT being that its a shelf cam I would bet its based on 1.5 Last edited by MR_P_BODY; 10/19/12 08:16 PM.

Re: Much (any?) advantage to a higher rocker ratio here? [Re: MR_P_BODY] #1321835 10/19/12 08:33 PM 10/19/12 08:33 PM
Joined: Mar 2009 Posts: 1,169 Virginia Beach, VA O Old School super stock
Old School super stock O Joined: Mar 2009 Posts: 1,169 Virginia Beach, VA	they just give the specs on 1.5 and 1.6 ratio rockers. 68 cuda formula S 588" bb 5sp 70 CUDA CONVERT 500" 5SP (SUBLIME) 70 CUDA CONVERT 500" 5SP (PLUMCRAZY):TOO MUCH HORSEPOWER, IS ALMOST ENOUGH!

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