4 Valve LS Cylinder Heads
Thread Starter
TECH Enthusiast
iTrader: (5)
Joined: Apr 2011
Posts: 561
Likes: 0
From: The Great State of Texas
4 Valve LS Cylinder Heads http://www.hotrod.com/events/mercury...-at-sema-2014/
Pretty darn cool. Expensive no doubt, if money wasn't an issue would you make the switch?
Pretty darn cool. Expensive no doubt, if money wasn't an issue would you make the switch?
TECH Apprentice
Joined: Sep 2006
Posts: 328
Likes: 3
Being made by mercury racing, means those are the real deal. They have been tested, and will be available, unlike the vapor ware heads that have popped up here in the past.
did some reading:
http://mercuryracing.com/wp-content/...8_Final_LR.pdf
it says that the header mount flange is moved outward 21 mm (.82") and down 42mm (1.65") the flange is at the same angle as stock exhaust flange, and that off the shelf headers will bolt on.
Also has 25% more intake valve area, and 33% more exhaust valve area than 2 valve heads
did some reading:
http://mercuryracing.com/wp-content/...8_Final_LR.pdf
it says that the header mount flange is moved outward 21 mm (.82") and down 42mm (1.65") the flange is at the same angle as stock exhaust flange, and that off the shelf headers will bolt on.
Also has 25% more intake valve area, and 33% more exhaust valve area than 2 valve heads
Last edited by Krom; Nov 8, 2014 at 06:39 PM.
I would buy them, that combo should take the LS engine well north of 100 hp per litter the easy way.
Will miss the single cam push rod sweet sound but making 130 hp per litter is a good trade off in in my book.
Means a 7.2 litter could make above 900 crank horse power N-A in street trim. I buy that.
Will miss the single cam push rod sweet sound but making 130 hp per litter is a good trade off in in my book.
Means a 7.2 litter could make above 900 crank horse power N-A in street trim. I buy that.
Thread Starter
TECH Enthusiast
iTrader: (5)
Joined: Apr 2011
Posts: 561
Likes: 0
From: The Great State of Texas
I would buy them, that combo should take the LS engine well north of 100 hp per litter the easy way.
Will miss the single cam push rod sweet sound but making 130 hp per litter is a good trade off in in my book.
Means a 7.2 litter could make above 900 crank horse power N-A in street trim. I buy that.
Will miss the single cam push rod sweet sound but making 130 hp per litter is a good trade off in in my book.
Means a 7.2 litter could make above 900 crank horse power N-A in street trim. I buy that.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
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
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
Pretty cool stuff.
But from what that sayd...the exhaust port configuration is the same as stock, just in a different position ?
ie if you had a turbo setup built...it would need modified ?
But from what that sayd...the exhaust port configuration is the same as stock, just in a different position ?
ie if you had a turbo setup built...it would need modified ?
TECH Apprentice
Joined: Dec 2004
Posts: 358
Likes: 1
a TT 4 valve LS would do it for me
I have an old LPE 390 LT5 making north of 600 and it's held together pretty good with over 70k hard miles on the build
cost will scare me I'm sure
but if they can make these numbers work, it's a great piece of engineering!
I have an old LPE 390 LT5 making north of 600 and it's held together pretty good with over 70k hard miles on the build
cost will scare me I'm sure
but if they can make these numbers work, it's a great piece of engineering!
TECH Addict
Joined: Aug 2004
Posts: 2,866
Likes: 4
Very interesting. Can't wait to see the results after it's been through their torture, sorry durability testing. After all these guys build stuff to run at full power for hours on end in some of the hardest environments for a performance engine! Plus they are not a small company so they should be support there once you have paid for the units.