I've never used ls3/l92 heads and probably never will. I think my current build has the potential to compete with these trucks, but I no longer have a full size to play with.

 

Cathedral for the street, rectangle for track/wot performance. Stock casting vs. stock casting. If you have to swap, then the cost has to be considered in what you're spending on performance. If you do that, then IMO a ported 243 should be looked at before going l92s. A nice set of used 243s with good springs goes for $1k or less. Brand new set, if you have cores is $1200.

What does it cost to go to l92s?

I will say, I own both styles. I'm not converting either. If I ever get my afrs on my truck, I'd really like to line up a race vs a rectangle port 6.0 truck.

 

So your comparing high dollar aftermarket heads with stock casting 700$ heads? I think it would be a little more fair to compare TFS 255 LS3 heads with your AFR heads.

 

Afr 225s milled 66cc. Peak dyno numbers wise, it's not the unfair of a comparison. But it's not the main idea of what I posted.

 

Absofuckinglutely man.. Anytime somebody asks a question whoever is to reply says you should this because I do and it has their butt Dyno pegged..
I posted in this thread because Ive had ported ls1 heads, milled 243 heads, and milled l92 heads, snd these l92s have the most power and great power all over the power band.. My truck has done proven itself, it still pulles a 24' deck boat damn good up hills down hills passing people in overdrive. Even out pulled a duramax that was rollin coal that was pulling a smaller boat. That's with a donkey dick cam and Vic jr intake which everyone that sits inside their littlle box say it cannot make any torque.

 

some food for thought on subject, take some time and read this thru all the pages

http://www.yellowbullet.com/forum/sh...d.php?t=585684

 

This is Tyler's truck . Cathedral ports take kindly to overcamming and rec ports do not. Thats why it made the same on the dyno.

 

Truck weighed over 300lbs more than when it ran 10.64.. Cam was designed for a **** load more nitrous what we were running then.. Since then I've gone from 2x .060 jets to 2x .073 jets.. I have a bone stock transmission and stock driveshaft with stock ujoints.. I'm jot going to spray anymore to it..

 

It actually did make more, it made 455 vs 428.. That was just said to get other opinions on the cam..

 

Yea that IVC point is crazy for a heavy truck with a vic jr. I bet it would love a 400 shot