Mods/numbers/track times on my sig.
Porting 243 heads
Thread Starter
Le Mans Master
Joined: Dec 2007
Posts: 8,375
Likes: 97
From: Somewhere in the Mid 9's TX
My car is at England Green right now and has a low 240 cam in it(Mayhem). It will be done next week.
I figured that 125-126mph and a 1.50-1.55 60ft should be knocking on the 10 second door. That is really my goal. What DA was your 11.50 pass? Those are impressive numbers! I also have DMH cutouts on my car. EG gained 12hp with just the cutouts on a cammed ls1.
Last edited by winters97gt; May 21, 2010 at 12:07 AM.
Race Director
Joined: Dec 2006
Posts: 12,387
Likes: 2,909
From: Fort Worth, Texas
Thanks for the info! I am looking to go around 125-126mph. I currently run 118mph with a low 1.7 on 18's. I want to run 10's and I am waiting for Weld to bring out a new lightweight wheel this year for our cars. Also need to get a hold of a Fast intake.
My car is at England Green right now and has a low 240 cam in it(Mayhem). It will be done next week.
I figured that 125-126mph and a 1.50-1.55 60ft should be knocking on the 10 second door. That is really my goal. What DA was your 11.50 pass? Those are impressive numbers! I also have DMH cutouts on my car. EG gained 12hp with just the cutouts on a cammed ls1.
My car is at England Green right now and has a low 240 cam in it(Mayhem). It will be done next week.
I figured that 125-126mph and a 1.50-1.55 60ft should be knocking on the 10 second door. That is really my goal. What DA was your 11.50 pass? Those are impressive numbers! I also have DMH cutouts on my car. EG gained 12hp with just the cutouts on a cammed ls1.
Thread Starter
Le Mans Master
Joined: Dec 2007
Posts: 8,375
Likes: 97
From: Somewhere in the Mid 9's TX
Thanks, Chris. I won't be granny shifting. I need to get to a track where I can make more than 4 runs in the entire night, though. BTW, the car sounds nasty with that 24x cam and cutouts. Then its very quiet through the TI's. HP tuning box went south, so they are sending a new one to EG this weekend.
Supporting Tuner
Joined: Sep 2004
Posts: 51,896
Likes: 39
From: ================== Houston, Texas www.englandgreen.com ================== Necessary Evil™ __________
CI 6-7-8-9-10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14
Thanks, Chris. I won't be granny shifting. I need to get to a track where I can make more than 4 runs in the entire night, though. BTW, the car sounds nasty with that 24x cam and cutouts. Then its very quiet through the TI's. HP tuning box went south, so they are sending a new one to EG this weekend.
Stephen
Thread Starter
Le Mans Master
Joined: Dec 2007
Posts: 8,375
Likes: 97
From: Somewhere in the Mid 9's TX
Le Mans Master
Joined: Jun 2006
Posts: 6,979
Likes: 31
From: Wichita KS
Thanks for the info! I am looking to go around 125-126mph. I currently run 118mph with a low 1.7 on 18's. I want to run 10's and I am waiting for Weld to bring out a new lightweight wheel this year for our cars. Also need to get a hold of a Fast intake.
My car is at England Green right now and has a low 240 cam in it(Mayhem). It will be done next week.
I figured that 125-126mph and a 1.50-1.55 60ft should be knocking on the 10 second door. That is really my goal. What DA was your 11.50 pass? Those are impressive numbers! I also have DMH cutouts on my car. EG gained 12hp with just the cutouts on a cammed ls1.
My car is at England Green right now and has a low 240 cam in it(Mayhem). It will be done next week.
I figured that 125-126mph and a 1.50-1.55 60ft should be knocking on the 10 second door. That is really my goal. What DA was your 11.50 pass? Those are impressive numbers! I also have DMH cutouts on my car. EG gained 12hp with just the cutouts on a cammed ls1.
Thread Starter
Le Mans Master
Joined: Dec 2007
Posts: 8,375
Likes: 97
From: Somewhere in the Mid 9's TX
I'm actually on my 3rd rear end, and 2nd RPM one. Today, I just broke another driver side axle on the street with MT DR's. Ripped 2nd, and bam. I drive the car hard
I've decided to just stick with the stock 243 heads for right now, and add a Fast 90 intake to my setup. I'm hoping for 12-15hp to get my car to right around 450rwhp.
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Former Vendor
Joined: Apr 2006
Posts: 2,470
Likes: 2
From: Portland OR
St. Jude Donor '10-'11-'12
Decided to add another persons perspective to educate a few:
"The computer controlled numerical control machine (CNC) merely repeats the program and cuts the head the same every time. Now, this makes a few assumptions
1) The setup is the same
(machined part is in the smae place relative to the cutting tool)
2) The cutting tool is set the same.
CNC eliminates (replicates) a lot of the hand work done in a standard porting job, there will still be a little.
Hand porting can/is part art, part science. A good hand port person will use a flow bench to tweak his porting job to balance and optimize flow. This is going to sound strange..... but CFM is not CFM as the character of the flow matters to HP/Torque...
I remember reading an article about the guy that does a majority of NASCAR intakes, why one guy? well he knows the little tweaks that give the power "where" it is needed. "
If someone wants more info do a search on Greg Good ported heads. This guy is one of the absolute very best at his profession.
"The computer controlled numerical control machine (CNC) merely repeats the program and cuts the head the same every time. Now, this makes a few assumptions
1) The setup is the same
(machined part is in the smae place relative to the cutting tool)
2) The cutting tool is set the same.
CNC eliminates (replicates) a lot of the hand work done in a standard porting job, there will still be a little.
Hand porting can/is part art, part science. A good hand port person will use a flow bench to tweak his porting job to balance and optimize flow. This is going to sound strange..... but CFM is not CFM as the character of the flow matters to HP/Torque...
I remember reading an article about the guy that does a majority of NASCAR intakes, why one guy? well he knows the little tweaks that give the power "where" it is needed. "
If someone wants more info do a search on Greg Good ported heads. This guy is one of the absolute very best at his profession.
2nd Gear
Joined: Dec 2007
Posts: 2
Likes: 0
Hey guys,
I am thinking about yanking my stock heads off and having them opened up. I am staying NA, and the fast intake and ported heads will be my last mods HP mods. I don't want to spend 2200+install on AFR's, and I know some guys have run great times with 243 heads. My car is going in tomorrow for an England Green Mayhem cam. (high 23X/low 24x).
What exactly needs to be done to the 243 head for an NA 5.7?
Mark
I am thinking about yanking my stock heads off and having them opened up. I am staying NA, and the fast intake and ported heads will be my last mods HP mods. I don't want to spend 2200+install on AFR's, and I know some guys have run great times with 243 heads. My car is going in tomorrow for an England Green Mayhem cam. (high 23X/low 24x).
What exactly needs to be done to the 243 head for an NA 5.7?
Mark
Team Owner
Joined: Sep 2003
Posts: 43,084
Likes: 33
From: Raleigh / Rolesville NC
I remember reading an article about the guy that does a majority of NASCAR intakes, why one guy? well he knows the little tweaks that give the power "where" it is needed. "
If someone wants more info do a search on Greg Good ported heads. This guy is one of the absolute very best at his profession.
If someone wants more info do a search on Greg Good ported heads. This guy is one of the absolute very best at his profession.
Click the linky for an example.
ie not all porting is the same or even equal.
Personally I like heads that have great flow at .200 to .550 of valve lift, over great flow at .600 and above.
Last edited by AU N EGL; May 31, 2010 at 07:49 AM.
Drifting
Joined: Oct 2004
Posts: 1,975
Likes: 9
From: "Philly" Pennsylvania
I have 243 TEA heads on my LS7, they opened up the combustion chamber and CNC'd the rest for my 427. Mild cam, nothing radical because it is automatic and it makes 500+ at the rear wheels (both HP & Torque). ECS built the engine and the heads perform very well for a slightly cammed 427. Go with TEA using 243's and you can't go wrong.
