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408ci/TVS2300/LSA heads build

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Old 12-31-2010, 04:07 PM
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Whatever cam I go with I want it to take advantage of the ported heads and have good driving manners. I drive the Tahoe at least 4 days a week to work...
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Old 12-31-2010, 04:31 PM
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Subscribed! That engine is going to make some serious power, and love the vintage orange block paint job!
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Old 01-01-2011, 05:54 PM
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Originally Posted by 1SlowHoe
Possible cam for this combo? It's the cam Atomic had in his 408/tvs1900 combo.
218/230 .595/.600 117 EPS lobes. That's -10* overlap. Is that a little too much overlap? I know I want 0 or a negative overlap but maybe -10* is leaving some power on the table. This cam was spec'd by Pat G for Atomics build.
Thoughts?
The cam in my vette is 219/231 .607/.617 115lsa. Pretty close to what you're considering. I thought it might be a little big for my truck. With your extra cubes, that thing should be about perfect (in my mind anyway). Should run hard with boost, have excellent manners, and even have decent fuel eco numbers. I don't think you'll be too far off running that cam. It may not have the sound the identifies you as running a cam that's stupid big, but you'll like it in just about every other way.
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Old 01-01-2011, 07:27 PM
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Actually the lack of chop is good for me. I like it to sound pretty stock.
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Old 01-01-2011, 07:34 PM
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Originally Posted by Atomic
I loved that cam, it drove like stock and had excellent midrange. Some power was probably left on the table especially up top, but I cant stress enough how drivable it was.
I'm thinking just a little more lift since the heads should breathe pretty well...Waiting on Ed Curtis to get with me. He has a suggestion but I didnt have time to talk to him again before the holiday...
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Old 01-01-2011, 07:38 PM
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Leading Edge Performance has two good FI cams. Joe at Leftcoast32 recommends them. I'm running one of theirs in my 370 with a front drive TVS.
I'm making 16psi on a 2.9" with 8 rib and 10% balancer. Joe can hook you up on pulleys and balancer too. Check it out, he has a new website. Just search for "leftcoast32".
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Old 01-02-2011, 01:03 AM
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Since I'm still deciding how far to port the heads, what do you guys think is a good CR for a 408/2300? I have been shooting for 10.5:1 but was thinking mabye even 10.7:1 might be ok. 91 octane gas and MAYBE meth for safety but not tuning for it timing wise...
My understanding is the cam choice can effect yout CR as well...
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Old 01-02-2011, 08:37 AM
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Originally Posted by 1SlowHoe
Since I'm still deciding how far to port the heads, what do you guys think is a good CR for a 408/2300? I have been shooting for 10.5:1 but was thinking mabye even 10.7:1 might be ok. 91 octane gas and MAYBE meth for safety but not tuning for it timing wise...
My understanding is the cam choice can effect yout CR as well...
10.5-10.7 will be great for the TVS. I'm right at 10.5 on mine. Still makes good power out of boost.
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Old 01-02-2011, 08:43 AM
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Do you not have access to 93 octane?
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Old 01-02-2011, 09:05 AM
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Originally Posted by 1SlowHoe
Since I'm still deciding how far to port the heads, what do you guys think is a good CR for a 408/2300? I have been shooting for 10.5:1 but was thinking mabye even 10.7:1 might be ok. 91 octane gas and MAYBE meth for safety but not tuning for it timing wise...
My understanding is the cam choice can effect yout CR as well...
If you go too high you are going to have a bitch of a time tuning out knock, lets face it you see some warm temps in the summer. Your cam can have a large effect on cyl. pressures as well.
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