AFR 225 vs. Ported L92s
Why dont you go with PRC LS7 Heads???
From 2 above I agree with Slow trap AFR With ported 90/90 the L92 is great too but L76 will kill 455ci but if Fast came up with the new Intake then I'd go with L92.
From 2 above I agree with Slow trap AFR With ported 90/90 the L92 is great too but L76 will kill 455ci but if Fast came up with the new Intake then I'd go with L92.
Depends on how high you're gonna spin it for one. And whether or not you wanna go with a sheet metal intake.
The L76 will limit you on that big of a motor. The L92 heads would be fine, just gotta flow enough through the intake to make power up top.
The L76 will limit you on that big of a motor. The L92 heads would be fine, just gotta flow enough through the intake to make power up top.
TECH Resident
Joined: Jul 2007
Posts: 844
Likes: 0
From: Florida
The L92 heads flow sick numbers from what i see. I am sure they could be touched up (not ported) by some places. Different intake (maybe ported l76?) or the new weiland coming in march and it could be nasty.
Trending Topics
Depends on your budget and how much youn want to spend to get every little once of power out of it. By design the AFR's are better. The AFR's can be touched up as well but the design of it has vleocity in mind not just raw flow numbers.
For a 455 you want the best flowing head you can find I would think. Depends on your budget. The ALL PRO LSW head and the ET canted are the kings of the hill from what I've seen so far on big bores. PRC is of course/usual a great flowing head at a super savings cost. Dont imagne you can go wrong with that head either.
For a 455 you want the best flowing head you can find I would think. Depends on your budget. The ALL PRO LSW head and the ET canted are the kings of the hill from what I've seen so far on big bores. PRC is of course/usual a great flowing head at a super savings cost. Dont imagne you can go wrong with that head either.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
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
Ported l92s flow about 350cfm corrrect? so if you have the cubes theres no question. afrs might have more optimum air velocity etc...but they are more expensive...
why you don't try the trick flow 235cc LS1 heads a compromise between veloctiy and flow with the fast 90/90 intake. i prefer LS7 heads over L92 for a 455ci motor.
there is a dyno thread in the dyno section about a 454ci LSX motor with Trick Flow 235cc heads and a medium cam for a 454ci. it put around 583 rwhp and 551 rwtq.
there is a dyno thread in the dyno section about a 454ci LSX motor with Trick Flow 235cc heads and a medium cam for a 454ci. it put around 583 rwhp and 551 rwtq.
Last edited by Abdullah; Feb 5, 2008 at 11:06 PM.
TECH Resident
Joined: Jun 2007
Posts: 952
Likes: 0
Depends on your budget and how much youn want to spend to get every little once of power out of it. By design the AFR's are better. The AFR's can be touched up as well but the design of it has vleocity in mind not just raw flow numbers.
For a 455 you want the best flowing head you can find I would think. Depends on your budget. The ALL PRO LSW head and the ET canted are the kings of the hill from what I've seen so far on big bores. PRC is of course/usual a great flowing head at a super savings cost. Dont imagne you can go wrong with that head either.
For a 455 you want the best flowing head you can find I would think. Depends on your budget. The ALL PRO LSW head and the ET canted are the kings of the hill from what I've seen so far on big bores. PRC is of course/usual a great flowing head at a super savings cost. Dont imagne you can go wrong with that head either.
coming to understand it all now-when i look at buying heads for any needs-wether n/a or fi-i look @air-speed-flow numbers in my eyes is how people sell heads-
if the budget wont go far the l92 is a very good platform-more then enough in my eye's
Nick--
Not trying to hi-jack the thread but which of these heads do you guys think would make the best torque from 3500-5500. I know a lot of guys just want to use whatever makes max HP even if its at 7500 but for a street engine I don't know if anyone's opinion differs. My 449 is 4.16 bore x 4.125 stroke, what is the BxS on a 455?