Best Cyl. head for a 427
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TECH Veteran
Joined: Sep 2014
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From: Mississippi
On the other hand the TFS cathedral heads have flown some 427ci combos into low 10s at 130 plus mph.
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Thread Starter
Teching In
Joined: Jun 2014
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Car is a Automatic with a fast 90/90 and custom cam 11.3 compression makes little over 500rwhp mild tune. What would I expect with new heads. I spoke to Cartek there 427 vettes with a stick using LS7 heads make a little more then 600 to the tire
TECH Veteran
Joined: Sep 2014
Posts: 4,893
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From: Mississippi
- Vettes always dyno higher at the rear wheels vs a F body. Take a 600 rwhp motor out that vette and install it in a F body you'll likely be around 560-57X rwhp.
- 6 speed cars always dyno higher at the tire over a automatic.
- Over 400 cubes you can benefit from a larger 102mm intake setup.
- what are your cam specs now?
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Joined: Sep 2004
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Whats your budget?
I see your posting this in the Gen III section but square port heads are best for max flow on large displacement engines if the top part of the power curve is your focus.
I offer a 390-395 CFM LS3 style port and I also offer a 410-415 CFM LS7 style port....BIG number respectively on both and I can offer them in a six bolt castings as well.
Not cheap but not crazy expensive either and a bargain for the flow they provide but a high flowing set of heads is useless without the right ported manifold, appropriate camshaft, valvetrain, and exhaust....you have to get the rest of it right as well because deep breathing big motors have a huge appetite for air and if you screw something up in the "pipeline", your results are surely compromised.
If you have a decent budget, the project should go smoothly but its not cheap to build a big powerful engine when you factor in all the other costs associated with allowing that to happen.
Feel free to PM or email me if you would like more information....I prefer email actually....easier to keep track of
Contact info in my sig below
Cheers,
Tony
PS.....All my advice above assumes this is a large bore 427.....but if it were a small bore 427 with a 4.100 stroke, my ported LS3 heads would still work well. If your wanting more bottom end punch you might want to consider a killer cathedral head....we could still make over 650 HP (flywheel) with my new 235 heads which is also a good choice for a small bore 427 build with the emphasis placed on responsiveness and tip in power etc.
I see your posting this in the Gen III section but square port heads are best for max flow on large displacement engines if the top part of the power curve is your focus.
I offer a 390-395 CFM LS3 style port and I also offer a 410-415 CFM LS7 style port....BIG number respectively on both and I can offer them in a six bolt castings as well.
Not cheap but not crazy expensive either and a bargain for the flow they provide but a high flowing set of heads is useless without the right ported manifold, appropriate camshaft, valvetrain, and exhaust....you have to get the rest of it right as well because deep breathing big motors have a huge appetite for air and if you screw something up in the "pipeline", your results are surely compromised.
If you have a decent budget, the project should go smoothly but its not cheap to build a big powerful engine when you factor in all the other costs associated with allowing that to happen.
Feel free to PM or email me if you would like more information....I prefer email actually....easier to keep track of
Contact info in my sig below
Cheers,
Tony
PS.....All my advice above assumes this is a large bore 427.....but if it were a small bore 427 with a 4.100 stroke, my ported LS3 heads would still work well. If your wanting more bottom end punch you might want to consider a killer cathedral head....we could still make over 650 HP (flywheel) with my new 235 heads which is also a good choice for a small bore 427 build with the emphasis placed on responsiveness and tip in power etc.
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Tony@MamoMotorsports.com
Anything worth doing is worth doing well. Build it right the first time....its alot cheaper than building it twice!!
www.mamomotorsports.com
Tony@MamoMotorsports.com
Anything worth doing is worth doing well. Build it right the first time....its alot cheaper than building it twice!!
If it's a 4.125" bore I'd find the best set of square port heads your budget can afford.
Frankenstein Racing Heads I use a lot, but Tony is no slouch either when it comes to cylinder heads.
Frankenstein Racing Heads I use a lot, but Tony is no slouch either when it comes to cylinder heads.
TECH Fanatic
Joined: Aug 2009
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From: Coast of San Mateo County Between Pacifica & HMB
4.125" Bore or Larger I would go with TFS LS7 Heads with MSD INTAKE
Both of which would be Ported by Tony. TFS LS7 Heads have the smallest
Square Ports ~260 CC That flow in excess of 400 CFM @ .600" Lift (MAMOFIED) and the
MSD INTAKE Ported by Tony is about 20 WHP better then the FAST 102
Ported by Tony. Combo has enough airflow for 725 + FWHP/650 RWHP depending
On Cam size and lightweight clutch/driveline and attention to all the details.
Just My .02
Both of which would be Ported by Tony. TFS LS7 Heads have the smallest
Square Ports ~260 CC That flow in excess of 400 CFM @ .600" Lift (MAMOFIED) and the
MSD INTAKE Ported by Tony is about 20 WHP better then the FAST 102
Ported by Tony. Combo has enough airflow for 725 + FWHP/650 RWHP depending
On Cam size and lightweight clutch/driveline and attention to all the details.
Just My .02
Thread Starter
Teching In
Joined: Jun 2014
Posts: 18
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It is a 4.125 bore it's a car I am looking to buy has 1 7/8 Kooks headers. Morel lifters. Cam 611/619 242/250 291/297 114+2 Trunion upgraded rockers, AFR 225 Cath ports 72cc chambers Brian tooley .660 springs 90/90 fast. I am going to be new to the LS game I always wanted one. Just like to here what I can do to make the combo better. Car is a 4th gen Camaro
TECH Fanatic
Joined: Aug 2009
Posts: 1,845
Likes: 255
From: Coast of San Mateo County Between Pacifica & HMB
Easiest upgrade MAMOFIED MSD Intake/102TB +30-45+ RWHP,
MAMOFIED FAST 102/102 + 20-30+ RWHP, VS FAST 90(unported)
Easy to sell FAST 90 $400-500?
Next,
MMS 235/250 Cathedral heads with above combo + 20-30ish
Over AFR225s (out of box)
Cam is actually pretty good size for a street car.
Easy to part out Intake, Heads, even cam depending how much
you want to Spend.
MAMOFIED FAST 102/102 + 20-30+ RWHP, VS FAST 90(unported)
Easy to sell FAST 90 $400-500?
Next,
MMS 235/250 Cathedral heads with above combo + 20-30ish
Over AFR225s (out of box)
Cam is actually pretty good size for a street car.
Easy to part out Intake, Heads, even cam depending how much
you want to Spend.
TECH Veteran
Joined: Sep 2014
Posts: 4,893
Likes: 703
From: Mississippi
If you go square port go LS7 over LS3. More horsepower for basically the same amount of money. Brian Tooley said a Adavced Induction LS7 head made 20 more rwhp over a TFS LS7 head in back to back testing. Also choose cam wisely when playing with square port heads. The large intake valves makes them very sensitive to overlapping.
It is a 4.125 bore it's a car I am looking to buy has 1 7/8 Kooks headers. Morel lifters. Cam 611/619 242/250 291/297 114+2 Trunion upgraded rockers, AFR 225 Cath ports 72cc chambers Brian tooley .660 springs 90/90 fast. I am going to be new to the LS game I always wanted one. Just like to here what I can do to make the combo better. Car is a 4th gen Camaro
That is extremely short seat to seat duration.
Thread Starter
Teching In
Joined: Jun 2014
Posts: 18
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Can you explain a little better to me what you mean about train wreck waiting to happen. Is the motor going to blow