Summit stage 5 cam, c6 build progress.
Whoever said the heads on my baby cam wouldnt pick up was correct.
picked up 8 hp lol
Made 478.
Currently have the car apart for the stage 4 Summit cam to see if the big cam makes the heads shine. Or if they're just too large for an ls3. Was a humbling day on the dyno Saturday lol
Stay tuned for the big cam . Just waiting for it to come in . The ghost cam is out of the engine currently.
picked up 8 hp lol
Made 478.
Currently have the car apart for the stage 4 Summit cam to see if the big cam makes the heads shine. Or if they're just too large for an ls3. Was a humbling day on the dyno Saturday lol
Stay tuned for the big cam . Just waiting for it to come in . The ghost cam is out of the engine currently.
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From: Central Cal.
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Verdad Gallardo TECH Senior Member
Joined: Jun 2016
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From: Central Cal.
But that said, sounds like very much a worthwhile mod!
I've read more than once here that a good bowl blend and multiangle valve job are 80% of a good port job, and only if the port mods are of benefit.
If I may ask, who did the above-described work on the heads?
Whoa... ALMOST not really worth putting the aftermarket heads on...... But 8 HP IS 8 HP... lol
But that said, sounds like very much a worthwhile mod!
I've read more than once here that a good bowl blend and multiangle valve job are 80% of a good port job, and only if the port mods are of benefit.
If I may ask, who did the above-described work on the heads?
But that said, sounds like very much a worthwhile mod!
I've read more than once here that a good bowl blend and multiangle valve job are 80% of a good port job, and only if the port mods are of benefit.
If I may ask, who did the above-described work on the heads?
Staging Lane
Joined: Jul 2020
Posts: 59
Likes: 29
See, this is what happens when "church port mafia" goes big port square heads.
Man this thread snowballed ta fack out of control from "fix my daily driver honey" I'm not spending big money here so I'm just going to put a small cam in there and use what I have,... to aftermarket heads, 2 cams, etc. lol
Man this thread snowballed ta fack out of control from "fix my daily driver honey" I'm not spending big money here so I'm just going to put a small cam in there and use what I have,... to aftermarket heads, 2 cams, etc. lol 
Whoever said the heads on my baby cam wouldnt pick up was correct.
picked up 8 hp lol
Made 478.
Currently have the car apart for the stage 4 Summit cam to see if the big cam makes the heads shine. Or if they're just too large for an ls3. Was a humbling day on the dyno Saturday lol
Stay tuned for the big cam . Just waiting for it to come in . The ghost cam is out of the engine currently.
picked up 8 hp lol
Made 478.
Currently have the car apart for the stage 4 Summit cam to see if the big cam makes the heads shine. Or if they're just too large for an ls3. Was a humbling day on the dyno Saturday lol
Stay tuned for the big cam . Just waiting for it to come in . The ghost cam is out of the engine currently.
See, this is what happens when "church port mafia" goes big port square heads. Man this thread snowballed ta fack out of control from "fix my daily driver honey" I'm not spending big money here so I'm just going to put a small cam in there and use what I have,... to aftermarket heads, 2 cams, etc. lol
Man this thread snowballed ta fack out of control from "fix my daily driver honey" I'm not spending big money here so I'm just going to put a small cam in there and use what I have,... to aftermarket heads, 2 cams, etc. lol
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The heads may simply have too much CSA for the rpm and cubes of this engine. IF someone wants to stay with a smaller cam, converter and inexpensive intake, this at least shows how these particular heads responded. There are other aftermarket aluminum heads (TFS 255's as an example) that have a smaller high velocity port and would yield bigger gains with the present combination. So now it's time for more cam, more cubes, and an experiment with runner length. These will undoubtedly shift the power band up and to the right and it will be interesting to see if the longer runners crutch the bigger cam and heads to work better with that 3800 converter. Looking forward to the results!
It is not just the CSA but the engine wasn't demanding any additional CFM at the power it is producing. I bet the stock heads that Mavn did would provide enough peak airflow to make 700hp with virtually no restriction. I would've been curious to hear more about how it drove with the 280cc heads with the small cam. 280cc is big enough for a high rpm 427+ cube engine. It might've even lost performance despite gaining some power. Some of that 8hp is likely from the little bit higher compression with 64cc chambers. .030 cut off ls3 heads is ~65.5cc.
I am a big fan of ls3 heads, but you really only need 225-235cc for a high performance ls3 going by the math alone.
I am a big fan of ls3 heads, but you really only need 225-235cc for a high performance ls3 going by the math alone.
It is not just the CSA but the engine wasn't demanding any additional CFM at the power it is producing. I bet the stock heads that Mavn did would provide enough peak airflow to make 700hp with virtually no restriction. I would've been curious to hear more about how it drove with the 280cc heads with the small cam. 280cc is big enough for a high rpm 427+ cube engine. It might've even lost performance despite gaining some power. Some of that 8hp is likely from the little bit higher compression with 64cc chambers. .030 cut off ls3 heads is ~65.5cc.
I am a big fan of ls3 heads, but you really only need 225-235cc for a high performance ls3 going by the math alone.
I am a big fan of ls3 heads, but you really only need 225-235cc for a high performance ls3 going by the math alone.
