high flow heads
Thread Starter
Melting Slicks
Joined: Dec 2001
Posts: 2,437
Likes: 1
From: Gainesville Fl
high flow heads
whats the best flowing head for the LS1/2/6? i know you can get C5R heads to flow over 400cfm but im not sure how you would get ahold of those and i htink they need a custom intake anyway. What are you guys with really high rwhp numbers running in the way of heads? how much CFM do your heads flow and how much power are you putting out. Im curious who makes the best flowing head for a car using either an LS6 intake manifold or a FAST LSX intake manifold.
Racer
Joined: Jun 2004
Posts: 433
Likes: 0
From: Brookfield WI
I just had AFR 205 heads, a FAST 90 LSx intake with a hand ported LS2 TB installed at DTE and picked-up my car this week. My car is a A4 with stock TC, has QTP Tri-Y headers, and custom grind cam that is very mild (almost no lope), Halltech Stinger, undersize pulleys, Z06 Ti exhaust, and 3.42 gears (supposedly lowers the rwhp/rwtq numbers slightly).
The car is now making 423 rwhp and 391 rwtq (link to dyno charts below). The AFR heads / Fast 90 / LS2 TB added 55.5 rwhp and 34 rwtq with my configuration (probably limited somewhat by my headers).
http://www.comp-soln.com/NewDyno.pdf
Hope that helps.
The car is now making 423 rwhp and 391 rwtq (link to dyno charts below). The AFR heads / Fast 90 / LS2 TB added 55.5 rwhp and 34 rwtq with my configuration (probably limited somewhat by my headers).
http://www.comp-soln.com/NewDyno.pdf
Hope that helps.
Le Mans Master
Joined: Apr 2002
Posts: 7,281
Likes: 5
From: Boston
Wow, this topic is so extenssive that I dont even know where to begin. Start be telling us what you want to do with the car. e.g. Daily driver with some power, street strip with lots of power, all out race setup, etc. Plus tell us how much you want to spend on this project and we'll direct you to a good package.
Race Director
Joined: Mar 2001
Posts: 11,405
Likes: 26
From: Whippany NJ
CI 6-7-8-9 Veteran
St. Jude Donor '08-'09
NCM Sinkhole Donor
Originally Posted by 1996man
whats the best flowing head for the LS1/2/6?
Welome to 2006, did you enjoy your sleep? 
Last edited by Ikester; Apr 6, 2006 at 12:32 PM.
Melting Slicks
Joined: Dec 2003
Posts: 2,857
Likes: 2
From: pawleys island sc
Originally Posted by ChipN
I just had AFR 205 heads, a FAST 90 LSx intake with a hand ported LS2 TB installed at DTE and picked-up my car this week. My car is a A4 with stock TC, has QTP Tri-Y headers, and custom grind cam that is very mild (almost no lope), Halltech Stinger, undersize pulleys, Z06 Ti exhaust, and 3.42 gears (supposedly lowers the rwhp/rwtq numbers slightly).
The car is now making 423 rwhp and 391 rwtq (link to dyno charts below). The AFR heads / Fast 90 / LS2 TB added 55.5 rwhp and 34 rwtq with my configuration (probably limited somewhat by my headers).
http://www.comp-soln.com/NewDyno.pdf
Hope that helps.
The car is now making 423 rwhp and 391 rwtq (link to dyno charts below). The AFR heads / Fast 90 / LS2 TB added 55.5 rwhp and 34 rwtq with my configuration (probably limited somewhat by my headers).
http://www.comp-soln.com/NewDyno.pdf
Hope that helps.
just about same combo with Yank SS 3600 see sig for details - you will not regret getting the AFRs.
Former Vendor
Joined: Mar 2004
Posts: 1,518
Likes: 7
From: Valencia CA
Originally Posted by ChipN
I just had AFR 205 heads, a FAST 90 LSx intake with a hand ported LS2 TB installed at DTE and picked-up my car this week. My car is a A4 with stock TC, has QTP Tri-Y headers, and custom grind cam that is very mild (almost no lope), Halltech Stinger, undersize pulleys, Z06 Ti exhaust, and 3.42 gears (supposedly lowers the rwhp/rwtq numbers slightly).
The car is now making 423 rwhp and 391 rwtq (link to dyno charts below). The AFR heads / Fast 90 / LS2 TB added 55.5 rwhp and 34 rwtq with my configuration (probably limited somewhat by my headers).
http://www.comp-soln.com/NewDyno.pdf
Hope that helps.
The car is now making 423 rwhp and 391 rwtq (link to dyno charts below). The AFR heads / Fast 90 / LS2 TB added 55.5 rwhp and 34 rwtq with my configuration (probably limited somewhat by my headers).
http://www.comp-soln.com/NewDyno.pdf
Hope that helps.
The KEY is consistancy....seems every vendor out there hits a homerun with a few installs, but fewer of them do it alot, and even fewer do it on a regular basis.
The AFR's deliver by achieving above average results (some well above) in practically every single application they are applied to. Seems the handful of slightly disappointing AFR #'s came from shops that decided to port them themselves increasing volume and taking away from the approach we spent almost a year optimizing.
I don't think I have seen a single disappointed customer with an out of the box AFR....They might be a little more money but in the end you get what you paid for and then some. The guys that save the money up front end up spending even more when they decide to go back in a look for the HP they appear to be missing....ALOT of people can relate to that scenario.....trust me on that.
Good luck whichever route you choose to take...
Tony M.
Thread Starter
Melting Slicks
Joined: Dec 2001
Posts: 2,437
Likes: 1
From: Gainesville Fl
Im mainly talking about flow numbers ie., cfm on the intake side. for instance about the most you can get out of heads designed for an LT4 motor is about 300-310CFM. I know actual C5R heads are ported and make close to 400cfm. im just curious what cfm most of these aftermarket heads are running.
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Le Mans Master
Joined: Apr 2002
Posts: 7,281
Likes: 5
From: Boston
Originally Posted by 1996man
Im mainly talking about flow numbers ie., cfm on the intake side. for instance about the most you can get out of heads designed for an LT4 motor is about 300-310CFM. I know actual C5R heads are ported and make close to 400cfm. im just curious what cfm most of these aftermarket heads are running.
Former Vendor
Joined: May 2005
Posts: 3,749
Likes: 4
From: Valencia Ca
Originally Posted by 1996man
whats the best flowing head for the LS1/2/6? i know you can get C5R heads to flow over 400cfm but im not sure how you would get ahold of those and i htink they need a custom intake anyway. What are you guys with really high rwhp numbers running in the way of heads? how much CFM do your heads flow and how much power are you putting out. Im curious who makes the best flowing head for a car using either an LS6 intake manifold or a FAST LSX intake manifold.
On large bore motors I prefer the LS7 heads from GM.
Good luck on your project,
CHarlie
Thread Starter
Melting Slicks
Joined: Dec 2001
Posts: 2,437
Likes: 1
From: Gainesville Fl
Originally Posted by CharlieTuner@AandACorvette
Two proven vendors on heads would be AFR and ETP.
On large bore motors I prefer the LS7 heads from GM.
Good luck on your project,
CHarlie
On large bore motors I prefer the LS7 heads from GM.
Good luck on your project,
CHarlie
Pro
Joined: Nov 2003
Posts: 532
Likes: 0
From: herminston oregon
400 ft lbs tork!!!!
Originally Posted by ChipN
I just had AFR 205 heads, a FAST 90 LSx intake with a hand ported LS2 TB installed at DTE and picked-up my car this week. My car is a A4 with stock TC, has QTP Tri-Y headers, and custom grind cam that is very mild (almost no lope), Halltech Stinger, undersize pulleys, Z06 Ti exhaust, and 3.42 gears (supposedly lowers the rwhp/rwtq numbers slightly).
The car is now making 423 rwhp and 391 rwtq (link to dyno charts below). The AFR heads / Fast 90 / LS2 TB added 55.5 rwhp and 34 rwtq with my configuration (probably limited somewhat by my headers).
http://www.comp-soln.com/NewDyno.pdf
Hope that helps.
The car is now making 423 rwhp and 391 rwtq (link to dyno charts below). The AFR heads / Fast 90 / LS2 TB added 55.5 rwhp and 34 rwtq with my configuration (probably limited somewhat by my headers).
http://www.comp-soln.com/NewDyno.pdf
Hope that helps.
Racer
Joined: Jun 2004
Posts: 433
Likes: 0
From: Brookfield WI
Originally Posted by myblackC5
shur would like to know the numbers on that cam. stock idle, all that tork. when the hp numbers, and the tork numbers are that close it makes for a fun car to drive!
The cam is a DTE custom grind. The specifications were not disclosed other than 115 LSA. Another guy on the forum put together a spreadsheet between several cars with QTP headers and the torque on my car was +100 rwtq at 2,500 rpm, and stayed a good +30-50 rwtq above the others the rest of the rpm range. It's sort of like secret sauce on a burger. You may not know what's in it but you know that you like it.
