alright ladies and gents. i have spent the last 3-4 months researching, studying why things make power why they don't, watching countless videos, on anything i could think of to help me out. and now im here asking for help before i spend 3-4k on a set of heads, and what not for my combo.


so first ill give you my set up that i have. so we know my starting point. ...

364 CI 6.0L Iron block (gen 3)
Stock gen 4 LS2 rotating assembly with ARP 2000 rod bolts. (flat tops)
custom cam from Pat G (spec'd for ported 5.3L heads and 11.5:1 comp)
specs are 230/238 .626/.626 113+3
Edelbrock pro flo intake manifold.
48lb injectors.
gasket is a 4" bore .055 gasket MLS
plans to run E85
E85 fuel 320lph fuel pump.
will be running nitrous (going for the stock bottom end nitrous record in a fullsize silverado.)
power goals were 450+ whp on motor. no goals on nitrous.



so back to the Heads. i was looking around and i really like the MAST 245cc heads. 11* valves. saw a few magazine articles where a 408 made 620+ with a similar cam, (little bigger than mine but not by much) anyways after a lot of research im thinking the 245cc will be to big for my stock cube 6.0. so more research led me to the MAST 215cc heads, same 11* valve, smaller runner for the smaller cubic inches. but im a little skeptical to go so small on the runner because i do plan to do a 402 later on after i succeed or fail at the record . so i dont wanna spend 4k now and then be screwed when i go bigger.

so my next option is the TFS 225 heads. touched by TEA with their "nitrous" exhaust port. these heads seem like they are the best of both worlds. will flow plenty for a 402. but will also not be to big for the 364. my next and final option the option im least fond of because i have all the pieces for a cathedral style set up. is to sell my entire top end, get stock ls3 heads, an ls3 edelbroc intake manifold. and go that route. not really looking to trying and selling all my stuff just to buy ls3 stuff. so hopefully you guys have some good inputs with the TEA TFS heads?

i have to upgrade to a roller rocker with the TFS heads, so when i do i also planned on going with a 1.72 or maybe even a 1.82 roller rocker


thanks in advance for all the help you guys can give. if anyone has a similar setup they have i would like to see it thanks.

trying to keep as much tq as possible as the truck will weigh approximately 4200lbs without me in it. hence the relatively small cam.

 

Of the options you've listed, I'd personally do the TFS 225cc heads. TFS heads are some bad son bitches.

 

if you have other options im open to suggestions i have heard great things about the TFS heads but if theres another option maybe a little cheaper that will perform the same im all ears lol

 

id look in to the AFR,TRICKFLOW,MAST or even edelbrock. don't fool yourself either, there are plenty of cars making that type of power on low budget heads

 

i posted up two of those heads the MAST and the TRICKFLOW. i like the AFR heads as well but they are the same price. the edelbock are the only heads i hadnt really looked into, i did see the Dart pro 1 heads, and the pro comp heads, saw a magzine article where the pro comp heads made the most power and that included the edelbrock, trickflow, mast, and AFR heads. and those are extremely cheap heads. but im a little skeptical about those.

 

when I was doing head shopping I only had 2 options.. either AFR or TRICKFLOW...reason being is that based on people here those were the 2 heads with good numbers, but found that the AFR heads had an edge when it came to flow. either way you cant go wrong though

 

im really leaning towards the TEA TFS heads, the flow numbers are awesome. at 338/275 with a 225cc intake runner. 64cc chamber, so with flat tops i expect to be somewhere around 11.1 is compression. maybe mill them to bring the compression back to the 11.6 i wanted originally. also found their 220cc AS CAST heads. quite a bit cheaper and leaves room for me to send them off later to have them opened up. but i was dissapointed with the flow out of the box. they only come with like 306/235 not sure if that will hurt me with the power i want. has anyone used the 220cc as cast TFS heads? they are 1600 vs 2600 big difference with the extra grand i can buy a nice set of 1.82 roller rockers, the pushrods ill need to run the aftermarket castings. and still be under what the 225cc heads cost by them selves not counting the roller rockers i have to buy as well.

the 220 heads will cost me around 2200 ish ready to bolt on and run.

the 225 will cost me somewhere around 3400ish to bolt on and go. are the 225cc castings worth the extra 1200?

the AFR heads if i get the 230cc AFR mongoose heads. will cost me around 3k to have the ready to bolt on. again are these heads really worth the 800? and that will be re using the stock 1.7 rockers not getting a roller rocker, and a 1.82 ratio.

 

You can get the 220 heads from Brian tooley with some hand porting and get powdered metal guides so you use stock rockers right around the $2200 range. If you want to go roller rockers they will probably be $100 cheaper.Tony Mamo also has some 220 heads or 235 heads but i am not sure on cost. I think in the $2600 range.

 

So called brian tooley today. Man awesome service! After like an hour if talking we decided the trick flow 245cc will be my best bet for my goals now and future goals with the motor. Also getting the nitrous exhuast port. Powder metal guides to use stock rockers and trunion upgrade for now. Great man and i cant wait to do more business with him. He really helped me not just talked me into his he explained why these heads would benifit. Where thesmaller head would shine and we fit my goals with it. I highly recommend him for this. Great guy.

 

Yup he's a badass

 

Yes he is its rare that you get this type of customer service. I had called several people talking to different head manufactuers. And they all just tried to sell me their head with no rhyme or reason as to why. And none seemed interested in my specific build. Just yeah ls2 yup these heads work goo . He was interested what i was using it for and went from saying the as cast 220cc heads being a great optiom to recommending the 245cc heads because of the amount of nitrous i wanna spray. 🖒🖒🖒🖒. Thanks for all the help and recommending brian tooley

 

I didn't realize the TFS 245cc heads would work with those cubic inches.

 

Have you seen these? For sale in the classified section.

https://ls1tech.com/forums/parts-cla...ockers-pr.html

 

I had not seen those. But that price is a high.

Also the 245cc heads on a 4" bore this us what i find funny is people read TFS website and it says "will only work on a 4.165 bore" its bullshit. Look at the valve size. Of these heads. And then look at the stock valve size for the ls3. These are much smaller. They are not ideal o a 4" bore because of valve shrowding. But again look at how well people do with the ls3 heads. I did verify with brian to make sure they will fit and they do. 🖒

 

$3,500 new and he's asking $2,800. Doesn't seem too bad of a deal. I'm sure he'd come down to maybe $2,500 if you're serious.

If Brian told you they'll work, then they'll work.

 

They arent 3500 new �� TEA sells them at 2600 new. Granted its not with the .800 lift springs. Which i do not k ow how much those are but i doubt they are 1000 more than the dual .660 lift springs.