How Much Can they flow?
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From: NW Chicago burbs
How Much Can they flow? What is the highest flow numbers out there for Stock ported heads & who does the porting? Is it possible to get Stock castings Aluminum LT1 heads into the 300cfm on the intake and 200cfm on the exhaust??
check this out alot of flow comparisons to different head porters and LT1 LT4 heads http://www.malcams.com/legacy/misc/headflow.htm
Ai claims that they can.... I would like to see it on a bench myself.
Some of the really expensive race LT1 motors with stock castings can move 300cfm, they aren't going to work on a street car and you would spend half as much on some well prepped AFR's or TFS heads.
To quote Dennis@Airflowresearch on the topic...
"And YES to answer the ellusive questions everybody asks...there ARE ltx heads that go over 300cfm... We have had a program for this since 98...how well do they work on a street car?...not very....
Welding (on race LT1 castings) would be an understatement...
If I get a chance, I have a set in development right now. I will snap some pics for you guys.
.....These heads go on cars that leave vertical, turn 9200+ revs and consume 3/4 of a gallon in 1320 feet....If you must have a set, their are no returns and the cost is north of $7k.
....Our current "C" heads require about 210 hours of prep work. At that amount of time $7400.00 is a bargain. These heads propel 3410lbs to 8.96 seconds in 1320 feet.
Like I said, these are not for the street. Much easier ways to go faster for less. The point of this thread was to provide some simple concepts to make the ltx heads work for the DIY guy."
Bret
Some of the really expensive race LT1 motors with stock castings can move 300cfm, they aren't going to work on a street car and you would spend half as much on some well prepped AFR's or TFS heads.
To quote Dennis@Airflowresearch on the topic...
"And YES to answer the ellusive questions everybody asks...there ARE ltx heads that go over 300cfm... We have had a program for this since 98...how well do they work on a street car?...not very....
Welding (on race LT1 castings) would be an understatement...
If I get a chance, I have a set in development right now. I will snap some pics for you guys.
.....These heads go on cars that leave vertical, turn 9200+ revs and consume 3/4 of a gallon in 1320 feet....If you must have a set, their are no returns and the cost is north of $7k.
....Our current "C" heads require about 210 hours of prep work. At that amount of time $7400.00 is a bargain. These heads propel 3410lbs to 8.96 seconds in 1320 feet.
Like I said, these are not for the street. Much easier ways to go faster for less. The point of this thread was to provide some simple concepts to make the ltx heads work for the DIY guy."
Bret
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From: NW Chicago burbs
Originally Posted by SStrokerAce
Ai claims that they can.... I would like to see it on a bench myself.
Some of the really expensive race LT1 motors with stock castings can move 300cfm, they aren't going to work on a street car and you would spend half as much on some well prepped AFR's or TFS heads.
To quote Dennis@Airflowresearch on the topic...
"And YES to answer the ellusive questions everybody asks...there ARE ltx heads that go over 300cfm... We have had a program for this since 98...how well do they work on a street car?...not very....
Welding (on race LT1 castings) would be an understatement...
If I get a chance, I have a set in development right now. I will snap some pics for you guys.
.....These heads go on cars that leave vertical, turn 9200+ revs and consume 3/4 of a gallon in 1320 feet....If you must have a set, their are no returns and the cost is north of $7k.
....Our current "C" heads require about 210 hours of prep work. At that amount of time $7400.00 is a bargain. These heads propel 3410lbs to 8.96 seconds in 1320 feet.
Like I said, these are not for the street. Much easier ways to go faster for less. The point of this thread was to provide some simple concepts to make the ltx heads work for the DIY guy."
Bret
Some of the really expensive race LT1 motors with stock castings can move 300cfm, they aren't going to work on a street car and you would spend half as much on some well prepped AFR's or TFS heads.
To quote Dennis@Airflowresearch on the topic...
"And YES to answer the ellusive questions everybody asks...there ARE ltx heads that go over 300cfm... We have had a program for this since 98...how well do they work on a street car?...not very....
Welding (on race LT1 castings) would be an understatement...
If I get a chance, I have a set in development right now. I will snap some pics for you guys.
.....These heads go on cars that leave vertical, turn 9200+ revs and consume 3/4 of a gallon in 1320 feet....If you must have a set, their are no returns and the cost is north of $7k.
....Our current "C" heads require about 210 hours of prep work. At that amount of time $7400.00 is a bargain. These heads propel 3410lbs to 8.96 seconds in 1320 feet.
Like I said, these are not for the street. Much easier ways to go faster for less. The point of this thread was to provide some simple concepts to make the ltx heads work for the DIY guy."
Bret
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For LT1 head porting, Lloyd Elliott has lots of experience.
he's at www.eportworks.com
Here are links to his 3 basic levels of LT1 porting:
LE1 http://eportworks.com/LT1LE1.htm
LE2 http://eportworks.com/LT1LE2.htm
LE3 http://eportworks.com/LT1LE3.htm
Lloyd is very customer friendly and available to talk.
he's at www.eportworks.com
Here are links to his 3 basic levels of LT1 porting:
LE1 http://eportworks.com/LT1LE1.htm
LE2 http://eportworks.com/LT1LE2.htm
LE3 http://eportworks.com/LT1LE3.htm
Lloyd is very customer friendly and available to talk.
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From: NW Chicago burbs
Originally Posted by sssalah
My LT4 heads were ported by Lloyd Elliot and they flowed 305cfm and 200cfm. The flow sheet's at home but I remember the low lift numbers were also good.
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From: NW Chicago burbs
Originally Posted by automotivebreath
For LT1 head porting, Lloyd Elliott has lots of experience.
he's at www.eportworks.com
Here are links to his 3 basic levels of LT1 porting:
LE1 http://eportworks.com/LT1LE1.htm
LE2 http://eportworks.com/LT1LE2.htm
LE3 http://eportworks.com/LT1LE3.htm
Lloyd is very customer friendly and available to talk.
he's at www.eportworks.com
Here are links to his 3 basic levels of LT1 porting:
LE1 http://eportworks.com/LT1LE1.htm
LE2 http://eportworks.com/LT1LE2.htm
LE3 http://eportworks.com/LT1LE3.htm
Lloyd is very customer friendly and available to talk.
do you know if lloyd changes valve guides?
TECH Regular
Joined: Feb 2003
Posts: 444
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From: Bahrain
Originally Posted by SmokedOutZ28
Thats good to hear, if you don't mind me asking what was the charge to port those heads? I can't make up my mind if i want to spend the money to port the stock castings or get new heads.
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From: Easley, SC
Originally Posted by SStrokerAce
Ai claims that they can.... I would like to see it on a bench myself.
AI's CNC stuff is around 285 intake/200 exhaust. You want more than that, AI can get more. But flow numbers are like dyno sheets...they dont mean a damn thing.
Good thing AI's stuff actually runs well at the track.
Originally Posted by GreenbeanZ28
I've seen them on the bench myself
AI's CNC stuff is around 285 intake/200 exhaust. You want more than that, AI can get more. But flow numbers are like dyno sheets...they dont mean a damn thing.
Good thing AI's stuff actually runs well at the track.
AI's CNC stuff is around 285 intake/200 exhaust. You want more than that, AI can get more. But flow numbers are like dyno sheets...they dont mean a damn thing.
Good thing AI's stuff actually runs well at the track.
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From: NW Chicago burbs
Originally Posted by GreenbeanZ28
I've seen them on the bench myself
AI's CNC stuff is around 285 intake/200 exhaust. You want more than that, AI can get more. But flow numbers are like dyno sheets...they dont mean a damn thing.
Good thing AI's stuff actually runs well at the track.
AI's CNC stuff is around 285 intake/200 exhaust. You want more than that, AI can get more. But flow numbers are like dyno sheets...they dont mean a damn thing.
Good thing AI's stuff actually runs well at the track.
Originally Posted by GreenbeanZ28
I've seen them on the bench myself
AI's CNC stuff is around 285 intake/200 exhaust. You want more than that, AI can get more. But flow numbers are like dyno sheets...they dont mean a damn thing.
Good thing AI's stuff actually runs well at the track.
AI's CNC stuff is around 285 intake/200 exhaust. You want more than that, AI can get more. But flow numbers are like dyno sheets...they dont mean a damn thing.
Good thing AI's stuff actually runs well at the track.
Bret
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Joined: Nov 2002
Posts: 1,295
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From: VA
Originally Posted by Quickshotkimber
I heard Phil just did that to see if it could be done without welding anything. Pretty impressive. I'm very interested in a set of thier CNC LT1 heads. I'm all about real world performance, not internet bandwagons with NO NUMBERS TO BACK THEM UP!
