Iirc when you ran last dyno, due to oil pressure, only one run was done, and it was lean af. Get the new lifters in, verify oil pressure, get a proper amount of fuel in her, and I bet you find your power is close to your original goals. Then take the car and go gape nerds with it.

Do not get sucked into modding ADHD. Finish your motor, run the car, then decide what you want.

Short blocks are almost costing the same nowadays. You can get a iron 454 short block ready to go for about $6500. Then 750 bhp is attainable with great driving manners.

 

I like doing heads and have jumped off doing another 1..that says A LOT. As I'd rather do another head than to build bigger...and what i got can do what I'm asking... Pistons or bigger motor? 800 HP = $800 on Pistons or $5k+ for a larger engine?

 

What Darth said
...

 

Yeah will do that.
Once oil pressure is sorted the car will be going back on the dyno.
Will run the car and see how it goes.
Since stall converter is quite a bit looser than before I'm betting it will Rob some HP though.
i guess that's why this lumpier cam probably drives smoother than the smaller one did.

 

500+ is alot for a DD.... never could do that the way I drive.. just 2 days a WK at the most. I drive 2 fast as it is.. on the public streets and hwys. That's like adding fuel to a smaller 🔥.. still No Tickets. Rolling & LOL. Lord bless.

 

I'm not on FaceBook and from what I was told I got a few upset lol by no means did I say the TF were bad. They did well on everything I put them on. Are they the BEST thing out there? That depends on how you are asking. When the turbo car ran them we had to produce 25lbs of boost to run his 5.20 passes. Moving to the MAST 11* Black Label LS3 heads we dropped to 23.2lbs and went 5.Teens and 4.80s going back to 25lbs. TF did well just feel there are better more efficient heads out there. Again I am not bashing the castings lol

 

which ls3 mast did you use? The 255cc?

 

Their 255, stainless intake, inconel exhaust with a 7* quench cut on them.

 

those are fantastic heads

 

Do you guys think a mast black label 265cc LS7 head would do really well on a 427?
designed for a 4 inch bore so I'm thinking it should be a stump puller and make strong torque everywhere with a 4.125 bore.

 

I would like to see some flow numbers on them. Mamo 265 will flow 410 at 700 lift. There are heads bigger than those that do not reach that number or reach it over 800 lift.

If they get into that territory at 700 lift, I say give them a go.

 

 

Does Tony start off with a trickflow LS7 head and then works it?

 

Mast 265 is small 2.8 to 2.9 CSA and you'd get just what your thinking, my Rowdy heads flow around the same 370+ on a 4.00 to 4.60 bore. Now if we use a test bore of 4.185 bore I could expect to see 390cfm - 10 to 15 more cfm. I was told with 379 cfm I get at the most 390 ish on a perfect day, using the bore listed. Bigger the engine the more area or CSA is needed. The Mast 285 head is more like 3.1 - 3.2 CSA head. .....

Darth: That's what gets me .. with CSA vs CC, Mamo heads say 265 cc which tells us Nothing and Every Head seen or known of that's a Ls7 has a runner cc larger than 270+ to get the same 400+ cfm some need 2.250 inch valves. There isn't a head out that does these numbers with that amount of CC look it up.... WCCH, MAST, Brodix, TSP, FED, BES, CID Greg Good heads.. etc.

 

Yeah porters castings. Which means the holes start really small and the porter can do pretty much what he wants.

 

I hear you man. And that is exactly why I like them. The heads I bought from him hit 408 at 700 on a super flow 1020. 2.230 valve.

And last time I counted tony heads have NA records on 19 dynos. Twenty if Mickey has a record on his with that 454. Do they are not paper tigers.

 

their 255cc ls3 heads flow better

 

Port CSA is larger I'm willing to bet.

 

Ls3 heads usually are so should be better in 427

 

Engine or Rwhp Dyno....I got paper tigers... List them. I'm from the other side of the train tracks.