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Dan Ruddock
Samba Member
Joined: October 25, 2012
Posts: 3594
Location: Sarasota, in my adopted state of Florida
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 Posted: Tue Jun 10, 2014 10:10 am Post subject: |
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You really don't want to run 87 octane with this combo. I agree 1.4 rockers are too much for a dd car. I would run 1.25 and 1.3 are on the edge.
Dan |
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[email protected]
Samba Member
Joined: August 03, 2002
Posts: 12785
Location: Salt Lake City, Utah
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| Posted: Tue Jun 10, 2014 10:26 am Post subject: |
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The Web 163 was designed for 1.3 rockers.
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Alstrup
Samba Member
Joined: July 12, 2007
Posts: 7219
Location: Videbaek Denmark
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| Posted: Tue Jun 10, 2014 10:42 am Post subject: |
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Ditto that.
I have used the 163 with 1,25īs along with a light valvetrain several times, and can spin 6600 with no valve float if I want to.
I also have made my own version of the 163 with 0,472" lift on intake valve (About equal to 1,25 ratio on a stock cam) and stock 0,422 on exhaust, due to the fact that most aftermarket heads actually flows too much on the exhaust for engines w peak power below 6000 rpm. Especially on sub 2 liter engines this cam works very very well. Significantly more power than the W110 mainstream cam and way more usable torque. A further plus is a valve train that is not noisy.
For medium grade fuel I see no problems running 9-1 CR. Especially not if you use 1,25 rockers as they WILL bleed off a little dynamic compression. On nippy engines I use 9,5-1 CR and high grade fuel (about equivallent to 93 octane) At that CR it really produces both power and torque.
T |
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Dan Ruddock
Samba Member
Joined: October 25, 2012
Posts: 3594
Location: Sarasota, in my adopted state of Florida
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| Posted: Tue Jun 10, 2014 2:04 pm Post subject: |
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I agree, did not say it is a bad cam and rocker combo but for a dd car sometime going a little on the conservative side is a good idea. Nice combo.
Dan |
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