??Best Flowing Heads??
Thread Starter
TECH Resident
Joined: Nov 2001
Posts: 851
Likes: 0
From: Houston, Tx
??Best Flowing Heads?? I was wondering who makes the best flowing heads. What are the best #'s you have seen? Not really talking bout rwhp, but the actual flow numbers.
Any help would be appreciated,
Marty
[ November 18, 2001: Message edited by: Marty ]</p>
Any help would be appreciated,
Marty
[ November 18, 2001: Message edited by: Marty ]</p>
Re: ??Best Flowing Heads?? The School of Automotive Machinists here in Houston has some badass heads worked up by their chief instructors. The LS6 heads on Judson's Orange SS flow 350 cfm at .600 lift on the intake side and exhaust flows around 245 cfm at the same lift. These are some of the better numbers around and one of the big reasons the SAM SS runs in the 9s naturally aspirated...especially for the weight they're carrying. <img src="images/icons/shocked.gif" border="0">
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
Thread Starter
TECH Resident
Joined: Nov 2001
Posts: 851
Likes: 0
From: Houston, Tx
Re: ??Best Flowing Heads?? [quote]Originally posted by SpeedDemon:
<strong>370+ at .650. <img src="images/icons/smile.gif" border="0"> </strong><hr></blockquote>
Who?
<img src="images/icons/confused.gif" border="0">
<strong>370+ at .650. <img src="images/icons/smile.gif" border="0"> </strong><hr></blockquote>
Who?
<img src="images/icons/confused.gif" border="0">
TECH Enthusiast
Joined: Nov 2001
Posts: 652
Likes: 0
From: Newport Coast, Ca
Re: ??Best Flowing Heads?? [quote]Originally posted by Marty:
<strong>
Who?
<img src="images/icons/confused.gif" border="0"> </strong><hr></blockquote>
look at his website in his sig <img src="images/icons/wink.gif" border="0">
<strong>
Who?
<img src="images/icons/confused.gif" border="0"> </strong><hr></blockquote>
look at his website in his sig <img src="images/icons/wink.gif" border="0">
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Adkoonerstrator
iTrader: (4)
Joined: Nov 2001
Posts: 21,420
Likes: 0
From: Deep in the seedy underworld of Koonerville
Re: ??Best Flowing Heads?? [quote]Originally posted by SpeedDemon:
<strong>370+ at .650. <img src="images/icons/smile.gif" border="0"> </strong><hr></blockquote>
Hmmm.....How important is intake velocity when you throw a blower into the mix? I know flow is important but what about velocity?
<strong>370+ at .650. <img src="images/icons/smile.gif" border="0"> </strong><hr></blockquote>
Hmmm.....How important is intake velocity when you throw a blower into the mix? I know flow is important but what about velocity?
TECH Addict
Joined: Nov 2001
Posts: 2,207
Likes: 0
From: College Station, Tx
Re: ??Best Flowing Heads?? I can make a stock set of heads flow that. Just pull out the spark plugs and valves
<img src="images/icons/smile.gif" border="0">
But yeah, as was pointed out above peak flow by itself is really useless.
As a general axiom, a good set of heads will have good flow numbers, but a good set of flow numbers does not a good set of heads make.
Chris
<img src="images/icons/smile.gif" border="0">
But yeah, as was pointed out above peak flow by itself is really useless.
As a general axiom, a good set of heads will have good flow numbers, but a good set of flow numbers does not a good set of heads make.
Chris
TECH Regular
Joined: Nov 2001
Posts: 455
Likes: 0
From: Houston, TX USA
Re: ??Best Flowing Heads?? The ports are not large at all! You will never see a hogged out head comming from us. <img src="images/icons/smile.gif" border="0">
These are a radical head, and way out of most peoples price range, but none the less, that is what they flow. Our typical Stage II heads are very small and flow better than any other head that I have seen on the flowbench. This is not to say that there are not better heads out there, but I just have not seen them. Most shops that we see do exactly what was mentioned above...hog them out!!!
These are a radical head, and way out of most peoples price range, but none the less, that is what they flow. Our typical Stage II heads are very small and flow better than any other head that I have seen on the flowbench. This is not to say that there are not better heads out there, but I just have not seen them. Most shops that we see do exactly what was mentioned above...hog them out!!!
Re: ??Best Flowing Heads?? Peak Flow is interesting, but there are other considerations:
Velocity is important.
Swirl/mixture is important.
Flow rate at a usable maximum lift (IMO about 550 given the cams most of us run) is important.
Flow rate at mid lift is important too since the valve is at peak lift for just a relative instance.
Velocity is important.
Swirl/mixture is important.
Flow rate at a usable maximum lift (IMO about 550 given the cams most of us run) is important.
Flow rate at mid lift is important too since the valve is at peak lift for just a relative instance.
TECH Regular
Joined: Nov 2001
Posts: 455
Likes: 0
From: Houston, TX USA
Re: ??Best Flowing Heads?? [quote]Originally posted by Matt98SS:
<strong>SpeedDemon can you post the flow #s? I don't know about the other guys but not many of us using .650" lift <img src="images/icons/smile.gif" border="0"> </strong><hr></blockquote>
The car that these are going on will go to .650+ . <img src="images/icons/smile.gif" border="0">
Flow numbers don't make you go fast. Even at that, we can manipulate the flow numbers to say whatever we want. I would not, but it can be done. The real test is bolting them onto an engine and taking the car down the track! If anyone in Houston would like to try them out, we are having an install sale coming up. Prices have not been set, but they will be well worth it!
<strong>SpeedDemon can you post the flow #s? I don't know about the other guys but not many of us using .650" lift <img src="images/icons/smile.gif" border="0"> </strong><hr></blockquote>
The car that these are going on will go to .650+ . <img src="images/icons/smile.gif" border="0">
Flow numbers don't make you go fast. Even at that, we can manipulate the flow numbers to say whatever we want. I would not, but it can be done. The real test is bolting them onto an engine and taking the car down the track! If anyone in Houston would like to try them out, we are having an install sale coming up. Prices have not been set, but they will be well worth it!
Resident Grump
Joined: Nov 2001
Posts: 1,050
Likes: 0
From: Walker County Alabama
Re: ??Best Flowing Heads?? The best flowing heads???? The SAM heads are constantly evolving. Got a call from Jud the other day... There are better numbers coming with time.
Runner volume, bore size, valve size.... Be sure you compare apples to apples.
Runner volume, bore size, valve size.... Be sure you compare apples to apples.
D(irecto)r Pepper
Joined: Nov 2001
Posts: 1,952
Likes: 0
From: Houston Raceway Park...in TEXAS.
Re: ??Best Flowing Heads?? [quote]Originally posted by Patrick G:
<strong>The School of Automotive Machinists here in Houston has some heads worked up by their chief instructors. The LS6 heads on Judson's Orange SS flow 350 cfm at .600 lift on the intake side and exhaust flows around 245 cfm at the same lift. ek: </strong><hr></blockquote>
Pat, are these numbers based on a 3.9" bore like most of us use? Or were the numberss generated using a larger bore?
What size valves are these heads using?
Those are some EXCELLENT numbers if they were generated using a 3.9" bore!
<strong>The School of Automotive Machinists here in Houston has some heads worked up by their chief instructors. The LS6 heads on Judson's Orange SS flow 350 cfm at .600 lift on the intake side and exhaust flows around 245 cfm at the same lift. ek: </strong><hr></blockquote>
Pat, are these numbers based on a 3.9" bore like most of us use? Or were the numberss generated using a larger bore?
What size valves are these heads using?
Those are some EXCELLENT numbers if they were generated using a 3.9" bore!
TECH Regular
Joined: Nov 2001
Posts: 455
Likes: 0
From: Houston, TX USA
Re: ??Best Flowing Heads?? [quote]Originally posted by Raughammer:
<strong>
Pat, are these numbers based on a 3.9" bore like most of us use? Or were the numberss generated using a larger bore?
What size valves are these heads using?
Those are some EXCELLENT numbers if they were generated using a 3.9" bore!</strong><hr></blockquote>
What's happening John? I can't tell you if these heads were flowed on a 3.900" bore, but don't you think that would be kinda silly considering they are not going on a 3.900" bore??? For a typical Stage I, II, III head that is going on a stock bottom, yes, the bore needs to be 3.900" but if it is going on a 4.00" or better, it needs to be flowed on that size bore. After all, the same things hold true with a modded engine than a stock engine....Who cares what the heads flow except on the bore that they are actually going on. <img src="images/icons/smile.gif" border="0"> <img src="images/icons/smile.gif" border="0">
<strong>
Pat, are these numbers based on a 3.9" bore like most of us use? Or were the numberss generated using a larger bore?
What size valves are these heads using?
Those are some EXCELLENT numbers if they were generated using a 3.9" bore!</strong><hr></blockquote>
What's happening John? I can't tell you if these heads were flowed on a 3.900" bore, but don't you think that would be kinda silly considering they are not going on a 3.900" bore??? For a typical Stage I, II, III head that is going on a stock bottom, yes, the bore needs to be 3.900" but if it is going on a 4.00" or better, it needs to be flowed on that size bore. After all, the same things hold true with a modded engine than a stock engine....Who cares what the heads flow except on the bore that they are actually going on. <img src="images/icons/smile.gif" border="0"> <img src="images/icons/smile.gif" border="0">