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Old 11-06-17, 03:13PM   #1
mike76
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Default Ultradyne 288/296 H-10 cam

Posted this cam on another forum before. This is going into a street 440" with max head airflow to 270 cfm at .600" with very good low lift numbers. At .550" valve lift they flow 265 cfm. The heads are # 62's. With 9.7 cr and old style Rhoads lifters( also HS 1.65 rockers) will this be okay with 93 pump gas? This is a street engine and I thought (hope) it will perform very well with idle vacuum maybe up around 13". 4 speed tranny w/ 3.42 rear gears. This is a cam and Rhoads my dad ran about 15 yrs ago for a few thou miles. Whats your thoughts on this combo in a 3800 car ? Max rpm? Too small a cam to take advantage of head airflow? Your thoughts are appreciated! Mike
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Old 11-06-17, 05:42PM   #2
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What are the specs on the cam, duration @ .50...lift and lobe separation I have no way of looking at specs for that cam
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Old 11-06-17, 06:12PM   #3
mike76
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Quote:
Originally Posted by Gach View Post
What are the specs on the cam, duration @ .50...lift and lobe separation I have no way of looking at specs for that cam
231/239 @ .050; ls is 110 degreed to 104. lift w/ 1.5 rockers is .485/507 but I'll be using HS 1.65= 1.72 Thx, mike
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Old 11-06-17, 09:28PM   #4
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It will work very well on pump gas, not a problem, itís basically a Ram 1V cam. Ram IV heads flowed around 220 CFM. Is it to small for your head flow, itíll work just fine.

Make a nice street cruiser, the other question is, depends on what your looking for ET wise. Iíd say low 13ís high 12ís.
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Old 11-07-17, 12:51PM   #5
Steve C
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From the old UltraDyne catalog in the Pontiac section regarding that popular cam....

"Hot street/bracket cam, 3000 SS converter or 4-speed. No power brakes. Power 3000-6000."

All too often with many cam descriptions there is no cubic inches associated with the comments.


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Old 11-07-17, 05:34PM   #6
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Should be 12's easily with a good tuning and good carburetor
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