Rectangular Ported 241's!!!
Thread Starter
Teching In
Joined: Mar 2011
Posts: 13
Likes: 0
From: Down South
Rectangular Ported 241's!!! What's going on Tech! I have recently purchased a forged ls1(stock cub) and went to freshen up the motor just for safety and come to find out the thing has a "unique set of unheard of rectangular ported 241's"
Take a look at these photos, maybe you guys can see if any of your engine builders can try this if you're on a budget build!!
Intake Port Dimensions:
1.217 x 3.284
Take a look at these photos, maybe you guys can see if any of your engine builders can try this if you're on a budget build!!
Intake Port Dimensions:
1.217 x 3.284
,someone obviously spent some time going old school mentalityon those and they probably flow well at .550-.700 lift but I'd bet the low/mid
lift numbers are quite lazy and non efficient. They would be OK for a turbo
application or maybe a nitrous drag only setup.
Thread Starter
Teching In
Joined: Mar 2011
Posts: 13
Likes: 0
From: Down South
They are ported to the bone in the intake and exhaust ports. My 3700 camaro with an 4l80e and 3600 stalled and 175 shot got me to 6.50's with those heads..?!
Here's a video of the pass:
Here's a video of the pass:
Trending Topics
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
Holy Haggan Dazs port job...someone had some quality time with a carbide bit lol...they aren't even straight lol...but I would still like to see a flow bench on them before I count them out, you never know could be the next "thing", people running ls3 intakes on modified cathedral heads...
Lets see inside the port..
Looks nice and big on the outside, but how does the inside look like? I'd bet not even close to what a true rectangular port is which means it's just the opening like that.
Thread Starter
Teching In
Joined: Mar 2011
Posts: 13
Likes: 0
From: Down South
The Car is a pretty basic setup, it's has bmr everything under the bottom with 12 bolt and spool, the motor is just a stock block ls1 with pistons, rods, bolts and a 59x cam with a little 175 shot on her. It would probably pick up if i slapped a victor jr and 4 barrel throttle body on her because the stock ls1 intake length matches the heads but the width is only .997 and if you were to try to port it any further than that you'll be interfering with the gasket slot.
Here's a picture of the inside of the port, looks to me as whoever did these heads put some labor into them.
Here's a picture of the inside of the port, looks to me as whoever did these heads put some labor into them.
One thing that you forgot that old school BBC guys did...was WELD UP the runners!! When you hog the ports out like that, how thick do you think the runners are now? Probably paper thin. Unless the porter re-enforced the runners somehow, I wouldn't run them.
Why not? They came off of a running engine.
Thread Starter
Teching In
Joined: Mar 2011
Posts: 13
Likes: 0
From: Down South
Best e.t. with our mustang @ 3260 race weight:
60ft- 1.25
1/8th- 5.80 @ 118
1/4- 9.50 letting out of it
This is the 5.80 pass
