I'm building a 440 stroker with a 4.150 eagle crank eagle h beam rods Srp pistons. Looking for recommendations for the top end of the motor. Pistons would be 11:1 comp with 84cc heads. Want to run on pump gas and make 650 hp. Was looking at the trick flow 270 heads. Also want to use a roller cam. Hydraulic or solid. Also would like it to fit under the r/t hood on my 70 challenger Thanks in advance.
Brandon

The bigger the head, more airflow, the more power the motor will make
I had two sets of Indy heads for my motors, one set was a set of Indy SR Max Wedge intake port size that flowed around 340 CFM at .700 lift with 28 inches of water on a super Flow 600 bench, the other set was a set of CNC ported 440-1 that flowed right around 370 CFM on the same bench with the same lift and 28 inches of water. I tested those heads on my old pump gas 400 stroker street motor and on my higher compression bracket race motor, the pump gas motor made right at 50 HP more with the 440-1 heads than with the SR heads on the same DTS engine dyno with very similar weather and the same pump gas, the race motor made over 65 HP more with the 440-1 heads. I used the same intake and Holley 1050 CFM Dominator carb.with both sets of heads on the low deck and high deck motor, a 400-3 intake for the 400 block and a 440-3 intake for the 440 RB block
As far as a cam for your motor I don't know what you know so you need to help us understand what you want from the camshaft
Give us more information please
I have found out that all the Mopar wedge B and RB I've built, raced and dyno tested like more air to make more power
The issue is on camshafts and the rest of your parts is what do you like, wild and radical or mild and easy to drive
I like showing the other guys my taillight so I do what is needed to get that done

The Trick Flow 240 heads will make 650 hp but your compression is going to be higher than what you want. Not a lot of 84 cc heads out there other than Edelbrock or 440Source.

Do you already have the pistons? If so then you are kind of stuck. You could get some ported Edelbrock heads but they'll cost more than out of the box Trick Flow heads.

What parts do you already have ??

I have the block machined the crank rods and pistons. Basically I have the short block. No cam, heads, intake. Was looking for the best way to make 650 hp. It's ok if the compression ends up a little higher as long as I put enough cam in it to run on pump gas. Just going to be a weekend take it out and beat on it, not drive it everyday. So it can have solid roller if you think I need one. I think with my pistons and the trick flow heads it would be 11:5:1 comp
Thanks

Unless the crank assembly is balanced already, buy some dished pistons that'll keep the CR more pump-gas friendly. If you're insistent on running those pistons and 11.5-ish CR, keep in mind it may require some blend of race gas to keep the detonation under control, even if you try to Band-Aid it with a longer duration cam. That's about all I can suggest here.

Thinking long term, the problem with higher compression and a bigger cam is that if you ever want to switch to EFI you've just complicated your life. The O2 sensors do not like lead so race gas is out and tuning around a big cam can be a hassle.

If you are committed to your rotating assembly then you might want to pick a cylinder head with more cc. Ported Edelbrocks might be your best bet. Talk to Dwayne at Porter Racing Heads and see what he recommends.

The cam I bought was ordered by Benschoff (SP?) racing from Comp Cams, it was a solid roller that had 260@.050 on the intake with .420 lobe lift. 266 @.050 with .409 exhaust lobe lift ground on a 108 lobe separation angle installed from 106 to 107 intake lobe center. It had a set of Harland Sharp 1.65 roller rockers also on the second and third set of heads.
The first time I dyno tested the motor on a DTS engine dyno in Ontario, CA at the Carb Shop dyno it made 612 HP at 5500 RPM and 644 Ft. Lbs. at 4500 RPM with a low deck 6 pack and set of iron 906 heads that made 9.25 to 1 compression ratio, I liked those results a lot That was a 1976 400 block with four sleeves in it bored to 4.375 with a 4.250 stroke crankshaft and a set of CAT 6.800 long BB Chevy H beam rods, Ross -22.0 CC dished pistons installed .025 down from the deck with Fel Pro 8519 PT head gaskets, nothing magic about any of those parts
The next time I dyno tested it was with a set CNC ported Eddy RPM heads and a new 4.300 stroke crankshaft to raise the compression ratio up to 10.29 to 1, same cam, rods, pistons and so on Those tests where done in the middle of winter here in central OR at 2500 Ft altitude on a Stucka dyno that was not calibrated correctly That dyno said it made over 700 HP with the six pack(720 HP at 5600 RPM) and a Team G dominator intake(710 HP at 5800 RPM) with a 1050 Dominator carb with a Wilson intake Manifold 1.5 inch reversion spacer
The last time I dyno tested it was with the same short block and a set of Indy SR M.W. intake port heads with the same rocker arms as the Eddy RPM heads, those heads had 76.00 CC combustion chambers that raised the compression ratio up to 10.78 to 1 with the Fel Pro 8519 PT head gaskets and they flowed 30 CFM more than the RPM heads did on the same flow bench. I used a Indy 400-3 intake with the Wilson 4500 reversion spacer and a Holley #9375 Dominator carb with the stock jetting. It was dyno on a another DTS engine dyno in Klamath Falls, OR at 4300 Ft elevation and it made 727 HP at 7000 RPM and a little less torque than HP on Oregon 91 octane non ethanol pump swill
On your deal go big on the heads and camshaft and rocker arm ratio, it will pay off big with a lot of tire smoke and almost out of control power

the compression ends up a little higher as long as I put enough cam in it to run on pump gas

The cam isn't an adjustment for static CR.

As long as the OP doesn’t have any qualms about running a higher octane fuel if required, the motor should run great with 11.5cr.

If real pump gas compatibility was the goal, Then I’d be looking to have the motor be around 10.5cr, which is really going to require a piston change.

I had flattop pistons at first for my 440/493 as I was going to use 84cc RPM heads but when I decided to go with the 75cc EZ heads I switched to the D-dish type of piston. It still has a flat portion to get good quench but dropped my comp from about 11.8 to 10.6 which is what I was shooting for in my pump gas build. I was lucky as I traded my flattop pistons to my brother for some Hughes roller tip rockers and then bought new pistons. Good luck with your build. Ron

If i need to mix in race fuel that is fine. Is there a good 4150 carb intake that will work with the max wedge ports and fit under my r/t challenger hood? Also do you think a hydraulic roller would be ok to make that power or should I go with a solid roller? Thanks

4150 MW intake choices are slim. Indy is about the only game in town and I doubt it will fit under a steel hood.

MW heads on 500 inch short block will give you peak power around 7000 rpm. You might be able to find a hyd roller cam setup that pulls hard to 7000 but I doubt you're going to hit on that combo the first time out unless you work with an experienced engine builder.

I have a hyd roller in my low deck 512 and it pulls hard past 6500 rpm but I haven't spun it to 7000 rpm yet. It might do it and it might not. Valve train stability is a bit of a crap shoot for average folks who don't have access to a spintron.

No way I would want to experiment with a hydraulic roller cam and lifters on your deal
Buy a good proven solid grind camshaft around 260 @.050 with as much lift as you can get and a really good set of lifters and go have fun

If I were putting this together with your criteria I would by the TF240 heads with an Indy Dual plane 4150 which is only .225 taller than a stock cast iron int. manifold, a solid roller and a 1050 Holley. Should make 650hp@11.5SCR.

For intakes to fit your criteria, the two choices are the Indy dual plane or the Mopar 337, which is no longer produced so you’ll have to hunt for one.

For a street car, I’m not of the “run all the lift you possibly can” mindset.
You don’t need .850” lift in that type of application.
Do yourself a favor, and keep the lift and ramp speeds within reason, which will allow you to run lower spring loads, and when the right combination of parts are used..... the reliability is pretty good.
I’m talking solid roller here.

That’s what I’d use if the goal is really 650+hp.

That would be 1.2" taller

Agreed............I wouldn't even consider a 4150 on a combo like this and a skirted banjo 1050 has tons of velocity and can even win Drag Week with mileage to boot............

Yeah the Mopar 337 is a good suggestion, I had forgotten about that one since I haven't seen any in a while. But that would probably be a decent choice if a person could find ont.

I'm enjoying the hyd roller in my 512. It is 246 at 050 and pulls hard to 6500. I think my engine was around 575 to 600 hp on the engine dyno but I'd have to pull out the sheets. I'll get it on the chassis dyno later this month and then we'll see how far it will rev and what kind of power it is making in the car.

I think I'll stick with hyd rollers for the street from now on but it does seem to be a crap shoot. I've seen more than a few hyd roller setups give up early on the dyno.

I run the Indy dual plane with an 850 DP and it just fits under the hood of my 63 Sport Fury with the 440/493 combo. I do like it for all around performance on my street car, Ron

Jegs claims to have one in stock.

I don’t see that when looking at their on line store.

What is the M1 intake compared to the 337 intake? Do they make them both for a 4500 carb?would they fit under my hood with a dominator?
Thanks

https://www.jegs.com/i/Mopar-Performance/312/P4876128/10002/-1
Doesn't really mean they have it, but they say they do.
The Chicago Connection says they have 2 in stock.
http://www.chicagoconnection.us/index.ph...products_id=865

Uuuuhhh.........that’s a p4876126..........not a p4876337.

Yes, my mistake. I found an article about it and it gave the wrong part number. My apologies.

You guys think I should go with a dominator? I would be all for it. Is there any that would fit under the r/t hood with max wedge ports?
Thanks

Check out my face book page under Dominic Thumper and you will see MANY Dommy's I've done including our very own Ray Meyers on here(SIXPACKGUT)who won Drag Week with a 1050 I did for him years ago and MANY more success stories..............

Not that it’s the way I would go, but the Indy Mod Man manifold with a 4500 top might fit.

Or, get a 337 intake and have it modded to accept a 4500 carb.

Not that you need a 4500 carb to make 650hp.

Seriously???

An Edelbrock 800 will make 650 hp and have really nice street manners. Of course these days I'd toss the carb and use a Sniper on there. There are perfect for a 650 hp engine and you'll get the data logging function for free.