1.73 or 1.8 rocker opinions please

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1.73 or 1.8 rocker opinions please

Post  cobra501 on January 9th 2017, 8:51 pm

Before I learned about custom cams and the help of this forum this is the cam I chose for my 501. Being on a tight budject I am stuck with it good or bad. I do need a set of rockers to complete this engine however. My question is would the 1.8 rocker give me more power over the 1.73 ratio and if so pros and cons welcome. My build is a street deal mostly since I really haven't been down the strip yet . I do want a bigger bang for my buck though. I estimate my engine compared to others and actual dyno results to be 650 hp plus. Mafia TF intake , 1050 QF , Trickflow streets , built by Evans ford with pocket port work done , 10.2 CR dish SRP pistons ,4.14 stroke , 4.39 bore. baffled pan , vaccume pump , electric water pump . Accufab 2 1/8 headers .
Cam Style:
Mechanical roller tappet
Basic Operating RPM Range:
3,200-7,200
Intake Duration at 050 inch Lift:
254
Exhaust Duration at 050 inch Lift:
260
Duration at 050 inch Lift:
254 int./260 exh.
Advertised Intake Duration:
292
Advertised Exhaust Duration:
298
Advertised Duration:
292 int./298 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.671 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.678 in.
Valve Lift with Factory Rocker Arm Ratio:
0.671 int./0.678 exh.
Lobe Separation (degrees):
110
Intake Valve Lash:
0.016 in.
Exhaust Valve Lash:
0.018 in.
Computer-Controlled Compatible:
No
Grind Number:
FF XR292 R-10
Valve Springs Required:
Yes
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Re: 1.73 or 1.8 rocker opinions please

Post  Mike R on January 12th 2017, 12:38 am

Interested also

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Re: 1.73 or 1.8 rocker opinions please

Post  dfree383 on January 12th 2017, 7:24 am

Street deal mostly, use the 1.73, if your using the comp recommended springs they are on the light side
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Re: 1.73 or 1.8 rocker opinions please

Post  The Mad Porter on January 13th 2017, 11:14 pm

What valve springs are you running?
Seat #
Open #

While I have had great results with 1.8 rockers the additional lift and faster opening / closing rate (at the valve) of the higher ratio rocker will require more spring than the recommended comp 954-16's.


At 500" with your heads and intake your hp peak rpm will be 6,300 or better. Since Charlie did the heads he would be the person I would check with regarding the springs ability to deal with the higher ratio rockers.




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