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The Terminator
Engine/Tuning
What's the best cams for 03 terminator
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<blockquote data-quote="tt335ci03cobra" data-source="post: 16486098" data-attributes="member: 68944"><p>do cams if you have the heads open.</p><p></p><p>As per the op’s question from 7 years, probably a stage 2 blower cams from comp or MMR (quartet.) You can’t get much accuracy above 7000rpm with the stock ecu, so it doesn’t make sense to rev to 7500rpm without a stand alone.</p><p></p><p>Upgrading to a wider/larger lope cam opens your valves for a wider portion of the combustion and exhaust cycles. </p><p></p><p>this is a no brainer for extra power. </p><p></p><p>I’ve seen stock port Eaton cars on 13p-15psi with full bolt ons pick up 30-40whp and drop 2-3psi with ported heads and a well sized cam/properly degreeing them.</p><p></p><p>you can go from 430-450whp to 470-490whp with head/cam work on a stock Eaton.</p><p></p><p>it’ll drop boost because you’re going to be reducing the the restriction on the motor. Boost isn’t the end all be all. You’ll effectively be supplying the same cfm of air that the Eaton is pullied for as before which is all that matters. The boost will drop because your combustion and exhaust “chamber” will in effect be slightly more cavernous for slightly longer durations of the intake and exhaust cam rotations since the valves will be open slightly longer. </p><p></p><p>comparatively putting a narrower cam quartet in the head would increase boost but not add any horsepower. You would lose horse power and torque and create excessive back pressure. Make sense? The valves would be closed longer.</p><p></p><p>I make 810whp on 10-11psi with turbos on a 5.3L at 9.3:1 compression with very ported heads, stage 3 turbo cams custom ground to my build etc. very free flowing mill, rev happy and reasonably torquey for a ported head turbo car. </p><p></p><p>I went with MMR cams.</p><p></p><p></p><p></p><p>for a blower car, you want a lot of intake to feed the blower lobes.</p><p></p><p>On a turbo car you want to help spool so you can often run a smaller intake cam and a larger exaust cam to get the air out.</p><p></p><p>speak with a cam expert to help explain your goals, what you have now and plan to have later, and spec a great cam.</p><p></p><p></p><p>Good luck, best wishes</p></blockquote><p></p>
[QUOTE="tt335ci03cobra, post: 16486098, member: 68944"] do cams if you have the heads open. As per the op’s question from 7 years, probably a stage 2 blower cams from comp or MMR (quartet.) You can’t get much accuracy above 7000rpm with the stock ecu, so it doesn’t make sense to rev to 7500rpm without a stand alone. Upgrading to a wider/larger lope cam opens your valves for a wider portion of the combustion and exhaust cycles. this is a no brainer for extra power. I’ve seen stock port Eaton cars on 13p-15psi with full bolt ons pick up 30-40whp and drop 2-3psi with ported heads and a well sized cam/properly degreeing them. you can go from 430-450whp to 470-490whp with head/cam work on a stock Eaton. it’ll drop boost because you’re going to be reducing the the restriction on the motor. Boost isn’t the end all be all. You’ll effectively be supplying the same cfm of air that the Eaton is pullied for as before which is all that matters. The boost will drop because your combustion and exhaust “chamber” will in effect be slightly more cavernous for slightly longer durations of the intake and exhaust cam rotations since the valves will be open slightly longer. comparatively putting a narrower cam quartet in the head would increase boost but not add any horsepower. You would lose horse power and torque and create excessive back pressure. Make sense? The valves would be closed longer. I make 810whp on 10-11psi with turbos on a 5.3L at 9.3:1 compression with very ported heads, stage 3 turbo cams custom ground to my build etc. very free flowing mill, rev happy and reasonably torquey for a ported head turbo car. I went with MMR cams. for a blower car, you want a lot of intake to feed the blower lobes. On a turbo car you want to help spool so you can often run a smaller intake cam and a larger exaust cam to get the air out. speak with a cam expert to help explain your goals, what you have now and plan to have later, and spec a great cam. Good luck, best wishes [/QUOTE]
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