New Frankenstein Stage 2 Heads!! 243 Cathedral Port Monsters!!

[@jacobburke7455]

Yes sir. Excited as hell to finally be able to see this thing with life back in it and see some power.

[@TheKingCoopa]

For sure, me too!

[@Deested]

Excited for you brother. Can’t wait to get my m311’s, and have the same excitement

[@TheKingCoopa]

Hey, sorry for the late reply. Thats awesome! Did you get the m311's in yet!? Thanks for the support!

[@utahcountypicazospage5412]

1 7/8 headers are awesome they help at all rpm especially now that your gonna make more power

[@TheKingCoopa]

For sure, Definitely now that I have the 6.0L! I'm just waiting on my intake from the paint shop, and should be starting it soon 🤘 Thanks for the support!!

[@El_ivan123]

I love your truck, it motivates me to work on mine! I have a lq9 and I plan on upgrading heads, I’m not sure which to go either with 243 or 823

[@TheKingCoopa]

Hey thats awesome! The LQ9 is a good motor to start with. Personally I'd stick with the 243 heads, just because its the same generation and the easiest. The 823 squar port ls3 heads flow really well, and they can fit on the gen 3 motors, but I know they need a little tweaking and you need specific parts to make it all work. Im not super knowledgeable with the gen 4 car motors, so im not much help here. I just say the 243s because thats what I know haha. But if you want the 823s and have good knowledge on it, then go for it! They will make some really good power. Thanks for the support and sorry for the late reply. Hope that helps

[@robertbailey3057]

823 rec port heads fit perfect in a gen 3 6.0..you don't need anything

[@300blkaac]

Speed engineering now has 2” headers for our nbs trucks.

[@TheKingCoopa]

Oh nice! Didn't know that. Those must be new. You think 2" might be to big?

[@300blkaac]

@@TheKingCoopa For your combination the 2” should be prefect with some room to grow. I’d say you’d be close to the limit of 1 7/8” already with your build

[@dylan-ym4pj]

I got the same build as you 6.0 LQ4 4l80e chop monster cam 3600 stall converter LS7 lifters Yadda yadda I really really wanna go with those heads bad. I got the 317 heads got the trunnion kit done and what not. My question is what kinda fuel system you going with?

[@TheKingCoopa]

Oh nice!! Sounds like a really solid build 👌👌 hopefully I can start mine up by April 1st. (I took on way to many modifications at once with this truck lol) but frankestein did say their stage 2 porting will get about 50 extra HP on a 6.0. They are expensive though. For the injectors, I went with some fast 50lb or 60lb injectors, what my tuner recommended (fast injectors are a little harder to tune, unless your familiar with them) then added holley billet fuel rails. And for the fuel pump, I'm still not sure yet. I dont think my pump will keep up with the nitrous. So either a hellcat pump, or two walbro 450 pumps. Long term goal is twin turbos, a few years from now. So I might just do a fuel cell setup, and buy the big pumps now. I still have a few weeks to decide. Sorry, but hope that helps

[@MBNeal]

That is beautiful. Can't wait to see that go down the road.

[@TheKingCoopa]

Me too, thanks bro!

[@whiplashtv2022]

Those heads look amazing. What material is the intakeand exhaust valves and how much do they weigh?

[@TheKingCoopa]

Hey, I appreciate it! The valves are made by Mahle, and are Stainless steel. Not exactly sure the individual weight. But each head weights about 28lbs.

[@CharmleysChopShop]

I really want some heads for my 5.3 but i honestly feel like ill lose power with the loss in compression getting rid of my 862 heads. 6.0 i could see a big benefit, those heads looks awesome. Big $$ though

[@TheKingCoopa]

Hey, sorry for the late reply. Personally I'd stay with the 862 heads for your 5.3L, unless you're planning on going boosted or making some big HP. Even when I ran my stock 243s on my cammed 4.8L I had dozens of people telling me the stock 243s flow to much and I was losing power. So some ported CNC heads would be a waste of money on a stock 5.3. But they are definitely expensive, I cried a little when I paid for mine 😅 thanks for the support 🤘

[@swappedoutZ71]

Do it the smart way. I had 243 heads made with 62cc chamber size which is same size as 5.3 heads. Tsp prc heads when u order them they ask u what cc size u want.

[@Ca.ctsv2]

Those heads look awesome! Came across your channel because looking for info on getting my heads ported on my 2012ctsv,did it gain 50hp?

[@TheKingCoopa]

Hey, thats awesome, I love the ctsv's. So I havnt finished putting everything together yet. The motor and transmission are installed. But I decided to do a wire tuck in the engine bay.... terrible mistake. I should have been done with this truck months ago 😅 but even if it was finished, I can't truly answer that question for you. Mainly because I have to many variables. Went from a small cammed 4.8L and 4l60e, to a fully built 6.0/4l80e, 3800stall, large cam, ect. Im changing to many parts to really know if the gain from the heads was worth it. I called linkinfelter, they wouldn't give me any hp specs for their heads. But I thought it was pretty bold of frankestein to say it will get +50hp. But they were pretty confident and I believe them. I'll find out soon though haha. Sorry, hope that helps you out. Thank you for the support! 🤘 good luck with the ctsv

[@DUNDEETV.24]

What’s the update, were you impressed? Any dyno info?

[@TheKingCoopa]

Hey, I can't give the best results on the heads, only because I changed alot at the same time. But im sure they made a big difference. Old setup was a 4.8, 224/226 112 crane cam, tbss intake, 3.73 gears, and the 243 heads. Made 355hp. The new setup is a 6.0 LQ9, 236/242 112 cammotion cam, tbss intake, 4.10gears, and ported 243 heads. Made 472hp.

[@DUNDEETV.24]

@@TheKingCoopa that’s 472 to the wheel right!

[@TheKingCoopa]

@@DUNDEETV.24 correct. The 4.8L was on a hub dyno, and the 6.0L was on a roller dyno. The new motor is setup for a 250shot of nitrous. So I'll be getting it dynoed again in about 2 weeks with that.

[@JuanyJuanes]

Any PTV clearance issues? Finally getting the 243s. The book you recommended me is great btw

[@TheKingCoopa]

Oh nice, thats awesome! There isn't any PTV issues with the 243s and 4.8L-6.0L. The issues start to arise when you get a larger camshaft, different ratio rocker arms, or mill the heads down. My heads are milled .015, I have stock rebuilt rockers, and my new cam is like a 240/234 112+4 I think. Don't quote me on that one. But when I spec'd everything out, that camshaft is the largest i can go, since my pistons aren't butterfly cut. Or I would have PTV issues.

[@JuanyJuanes]

@@TheKingCoopa interesting thanks. I’m going with the BTR Red Hot Cam for the SBE LS2. BTR RED HOT CAMSHAFT 221/24X, .619/.617, 113 LSA

[@TheKingCoopa]

@@JuanyJuanes oh nice, hard to go wrong with BTR. They make alot of good cams. The lift and duration isn't super crazy, you shouldn't have any PTV issues.

[@JuanyJuanes]

@@TheKingCoopa appreciate it. I may document my build and put it on KZbin. Ppl are discouraging me from dumping money into a old car (heads/cam/ported intake and TB cost $5-6k), but the car ain’t worth shit as a trade in. I would rather learn and make mistakes on a old car than a C7

[@TheKingCoopa]

@@JuanyJuanes screw what other people say. You need to look out for your best interest and what makes you happy. If doing that will make you happy, then do it. (Not trying to brag) but I have $28k into my single cab, and I just bought 5,600$ drag wheels and tires for it. You think people don't tell me im dumb lol. I bought the whole truck for 6k...... when you customize a vehicle, usually for every dollar you put in, You get about .40cents back. Thats just the way it is. I dont ever plan on selling my truck, so im not worried about it, and do what makes me happy. Yes it would be good to learn on an older car. Even if you did get a C7, its still gonna be more expensive to make that fast as well. Going fast isn't cheap haha. Plus everything on a C7 is going to be expensive. And one other thing, idk where your at in life. But for example, if you're living in an apartment with no garage, have alot of debt, or this is your only car, I would also discourage you from it, I'd recommend doing some other priorities first, then modify the car later. A race car and daily don't mix lol. It will break down eventually. I know that's alot of info, but hope it helps.

[@juliosandoval8244]

I wonder if the 799 heads or 823 heads would work with a supercharger on lq9

[@TheKingCoopa]

Hey, sorry for the late reply! You should be able to make them both work, as long as the supercharger ports match the heads. Cathedral or Rectangular ports.

[@drewford4837]

Speed Engineering now has the 2” LTHs Just came out and for your year

[@TheKingCoopa]

Hey, someone else just told me about that! I'll definitely have to look into them 🤘

[@RICHBCM]

Where can I pick up some of that plastic on your fenders? What's it called?

[@TheKingCoopa]

Hey, sorry for the late reply. Here is a link to some similar stuff, called collision wrap. a.co/d/6Nd2Z5B

[@SNAA-9751]

Would these head fit a stock block 6.0? Or are they too big?

[@TheKingCoopa]

Hey, they will bolt right on. Mine is a stock bottom end 6.0L. All LS Cathedral Port heads will bolt onto any 4.8L, 5.3L, 5.7L, or 6.0L. But these probably flow WAY to much for a NA 4.8L or 5.3L.

[@GamerPro-nw5lf]

Is it possible to adapt the ls3 engine head to the gm 151 engine?

[@TheKingCoopa]

Hey, off the top of my head, im gonna say no. But anything is possible if you put your mind to it! Might take alot of time and money, but im sure its possible.

[@nathandunn6974]

Those heads look fantastic 👏 can't wait to get mine rebuilt and ported on my 2006 LS4 5.3 with truck Norris cam

[@TheKingCoopa]

Thanks! I'm super happy with them. That will be sick, especially in an LS4! Alot of people love the truck norris cam too, can't go wrong with that

[@nathandunn6974]

@@TheKingCoopa im ready to go got everything but Doug thorley headers but I think I might be ok with just the ported heads and cam plus swapping out to a truck intake!! Got my trans rebuilt with Circle D 2800 stall

[@TheKingCoopa]

@@nathandunn6974 if you could get the headers before you tune it, that would be ideal for maximum gains of the tune. The truck intake is pretty great, the tbss/nbss is even better, but im sure your limited on fitment/clearance with an ls4. And the 2800stall is good all around, thats what I used to have in my single cab, and I liked it alot. Picked up fast, but still daily driving like stock.

[@nathandunn6974]

@@TheKingCoopa that's the only issue with that TB SS intake its a headache to fit and lots of modification to make it fit!! I still might get the headers im shooting for 370 maybe 400 hp

[@TheKingCoopa]

@@nathandunn6974 yea, I wouldn't worry about it then. With all those modes, I think 370hp is definitely a reasonable guess!

[@nolaeast7412]

can i send reg gm 243 heads from the junk yd and they can redo them

[@TheKingCoopa]

Hey, they can definitely do those heads, just like they did mine. But I dont think they offer just a regular rebuild/cleaning service. You could always call and ask, but I'm pretty sure they only do the porting service, which comes with them cleaning and rebuilding the heads.

[@speedlife301]

Frankenstein and cid are the only heads anyone should ever use for a ls or lt. Texas speed heads don’t pick up the same power trust me.

[@TheKingCoopa]

For sure! I called a few other head companies. Frankestein was the only one that give me an estimate gains hp/tq. The guy was pretty knowledgeable/helpful too. I should beable to dyno the truck here soon. Im sure they made a difference. Thanks for the support 🤘

[@Tazerect]

What where the gains looking to get my 243s done on my ls2

[@TheKingCoopa]

Hey, sorry for the late reply. I changed a lot on the new setup, so I can't tell you exactly the gains. but Frankenstein said their stage 2.5 243 heads adds an extra 50hp.

[@EXTRA---LARGE---FARVA]

Are there issues fitting the intake manifold with that much taken off?

[@TheKingCoopa]

Nope. I went .015. I've seen some guys even go .030 with no issues to the intake manifold. Thats alot for a cylinder head, but in the aspect of the intake, .030 is still a really small measurement

[@EXTRA---LARGE---FARVA]

@@TheKingCoopa Nice! Thank you for the reply. There's a lot of different things spun around on forums. It's nice being first hand accounts on what works and what doesn't.

[@TheKingCoopa]

@@EXTRA---LARGE---FARVA for sure. You're always gonna find alot of miss-information online. Just be careful with cutting too much off the heads. You will start to run into PTV issues. (Piston to valve clearance issues) especially if you get a monster camshaft, or different ratio rocker arms. Its a little bit of a science. If you're tuner is pretty experienced, they should beable to recommend a good combo for your setup. Probably even off the top of their head. you will also need shorter pushrods if you mill the heads. Good luck with your build 🤘

[@99hawk75]

What awd transfer case are you using?

[@TheKingCoopa]

Hey, I'll be running the NP149 NP3 transfer case, with a 32 spline input adapter to mate up to the 4l80e.

[@99hawk75]

@@TheKingCoopa where are you getting this from? Do you have a video on the installation? Love the videos!

[@TheKingCoopa]

@@99hawk75 i found it on Facebook marketplace. Had to drive an hour away and I talked him down to 180$. I dont have a video of it yet. Still searching for the AWD front diff from an SS truck (4.10 gears) the yukons had 3.73, plenty of these. The input adapter is made by time2kill and is like 600$...... but right now I'm filming a 4 video series of me cleaning and wire tucking the engine bay. Once I get it finished and tuned ill do the AWD swap video. Thanks for the support 🤘

[@brettbaker8130]

The 50hp over 317 heads?

[@TheKingCoopa]

The 50hp is from stock 243s to ported stage 2, 243s. Not sure about 317s but you could give them a call. Nice company to deal with.

[@shanejohn4992]

Order some 2inch headers from speed engineering

[@TheKingCoopa]

Hey, those must be new. I didnt know they made 2" for these trucks. You think 2" won't be too big?

[@wizardshome9686]

Valve size is what, flow numbers are what??????

[@TheKingCoopa]

Hey, its been a while since I filmed this, honestly don't remember what the specs on them were. I know you could give frankestein a call, I'm sure they can answer any of your questions. They were a good buisness to deal with. I did have the truck dynoed last week. On stock wheels it made 450whp before the nitrous, and calculated to 470whp on my smaller drag wheels. Thats also going through a built 4l80e and transfer case.. So the heads definitely flow pretty well.

[@wizardshome9686]

@@TheKingCoopa - You were talking about flow and saying the valves are huge - huge by what standards are you using? Port dimensions has very little to do with the airflow in the, which is in regards to the intake port coming from the bowl area and the short turn radius crossetion area. The exhaust is relatively the same but the port dimensions and crossection do make a good deal of difference - I have no desire to call one of my competitors to find out something I already know- if it is a ported factory head you can't put more than a 2.020 intake and 1.57 exhaust valves without changing the seats I'm glad you were satisfied with the performance you got

[@brianbuck8875]

Lol. Port opening dimensions won't determine if a port will lose/gain. Port velocity & cross sectional area are much more indicative of potential gain.

[@TheKingCoopa]

Good info! 🤘

[@migmogg8087]

Yo yo yo yo

[@TheKingCoopa]

Yo, whats going on!?

[@migmogg8087]

This is an lq9 ?

[@TheKingCoopa]

Correct. LQ9. Came out of an escalade

[@migmogg8087]

I need your recipe