What will it run? New 572 build

[aaronk785]

Makes me wonder how good the TF 270s are. My friends 572 Indy aluminum block, TF 270s in a 3100 lb. Car runs 5.78. Heads are bone stock. Wish I had either of your engines.

 

[MOPARMAGA]

That’s the thought. When we made that change to my friends engine on the dyno, and I mean almost identical 572 to this one, it gained 18 hp and 19 ft lbs of torque but gained a substantial average throughout the entire pull. It was pretty crazy to see.

Nice gains. I tried a few different spacers on my and everything lost power compared to the super sucker 2 inch spacers

 

[MOPARMAGA]

Makes me wonder how good the TF 270s are. My friends 572 Indy aluminum block, TF 270s in a 3100 lb. Car runs 5.78. Heads are bone stock. Wish I had either of your engines.

Almost seems like those heads are too small for 572 but it sure runs good

 

[71Demon540]

Makes me wonder how good the TF 270s are. My friends 572 Indy aluminum block, TF 270s in a 3100 lb. Car runs 5.78. Heads are bone stock. Wish I had either of your engines.

The trick flow is good stuff. And those are some good numbers. Don’t get me wrong, there are better options for all of us once we start packing 572” but going fast with a smaller head is still possible. I’m curious to see how people make out with the 290 head. I still don’t think it will compare to an Indy -1 head or edelbrock max wedge victor, but we will see what all people get into with it and how much power can be squeezed out of it.

If I had to do it over, and I had the money, I would have put 572-13 head on my engine after I broke the crankshaft and had to get mostly all new engine components. But it’s hard to spend extra thousands on heads and rockers when I already had to invest thousands to just fix it with the -1 heads. One day my goal is to get 572-13 head with a KB block RB, packing 588”.

 

[gregsdart]

The trick flow is good stuff. And those are some good numbers. Don’t get me wrong, there are better options for all of us once we start packing 572” but going fast with a smaller head is still possible. I’m curious to see how people make out with the 290 head. I still don’t think it will compare to an Indy -1 head or edelbrock max wedge victor, but we will see what all people get into with it and how much power can be squeezed out of it.

If I had to do it over, and I had the money, I would have put 572-13 head on my engine after I broke the crankshaft and had to get mostly all new engine components. But it’s hard to spend extra thousands on heads and rockers when I already had to invest thousands to just fix it with the -1 heads. One day my goal is to get 572-13 head with a KB block RB, packing 588”.

Dyno sheet of my 549, made 981.6 hp. Same combo with 440-1heads made 926hp, with thicker rings, everything else the same. If i ever do it all again, i will find a set of B1mc heads. The B1mc have over a 100 hp potential more power beyond the 572-13.
The thing about smaller heads on a big motor is the torque they begin with and average hp is higher at the start of each gear compared to the peak hp they have . So the average hp on a small head deal comes closer to the max power they produce. This will really show up if your converter is on the tight side, or you don,t rev quite as hi as tou need to.

 

[71Demon540]

Dyno sheet of my 549, made 981.6 hp. Same combo with 440-1heads made 926hp, with thicker rings, everything else the same. If i ever do it all again, i will find a set of B1mc heads. The B1mc have over a 100 hp potential more power beyond the 572-13

View attachment 1716508286

I guess more so for a 100% bracket racer, my current 440-1 heads suit me just fine. If I ever upgrade, it would be to an RB with more cubic inch first, even though I like my low deck combo.

 

[gregsdart]

A 572 or 588 wit 440-

I guess more so for a 100% bracket racer, my current 440-1 heads suit me just fine. If I ever upgrade, it would be to an RB with more cubic inch first, even though I like my low deck combo.

A 572 with 440-1 heads makes a great bracket combo IMHO. Capable of 900 hp, and lower rpm saves valvetrain.

 

[gregsdart]

A 572 or 588 with 440-

A 572 or 588 wit 440-

A 572 with 440-1 heads makes a great bracket combo IMHO. Capable of 900 hp, and lower rpm saves valvetrain.

Looking over my race history, motors i have built, and parts used, i would consider a 572/440-1combo with an Isky RR735 grind roller, but with 1.7 ratio rockers. That cam was a great torque cam for a bracket motor, with 278/290/110 duration. I am betting in a 572 /440/1 combo would make max power by 6600 to 6700,and would run 8.70s at 155 sorted out on radials. I went 8.77/153 at 3055lbs, 528cubes, back in 2004. I only had 1.55 rockers on it, but injected alky. Dynoed 847 hp at 7000

 

[71Demon540]

A 572 or 588 with 440-

Looking over my race history, motors i have built, and parts used, i would consider a 572/440-1combo with an Isky RR735 grind roller, but with 1.7 ratio rockers. That cam was a great torque cam for a bracket motor, with 278/290/110 duration. I am betting in a 572 /440/1 combo would make max power by 6600 to 6700,and would run 8.70s at 155 sorted out on radials. I went 8.77/153 at 3055lbs, 528cubes, back in 2004. I only had 1.55 rockers on it, but injected alky. Dynoed 847 hp at 7000

My current cam is 285-296 @ .050 .776/.752 with 1.6 rockers. 540".
Wallace racing says 5.38 at 2835lbs is 960 fly wheel HP.
Whether that is true or not, I don't know. I just know the engine runs well.

 

[gregsdart]

My current cam is 285-296 @ .050 .776/.752 with 1.6 rockers. 540".
Wallace racing says 5.38 at 2835lbs is 960 fly wheel HP.
Whether that is true or not, I don't know. I just know the engine runs well.

My thoughts were based on the idea some guys would want a motor that would have a longer life between rebuilds, but at the sacrifice of some horsepower. Your current motor is definitely making great power !
Some of my thoughts are based on having issues with valvetrain failures when i ran aggressive cams. The Iskycam served me well, and a move to a 283/296/112 Comp grind with .775 lift didn't show much improvement, but i only had 528 cubes . And i also had more problems with rocker bearing failures due to the intake angled pushrods.

 

[71Demon540]

My thoughts were based on the idea some guys would want a motor that would have a longer life between rebuilds, but at the sacrifice of some horsepower. Your current motor is definitely making great power !
Some of my thoughts are based on having issues with valvetrain failures when i ran aggressive cams. The Iskycam served me well, and a move to a 283/296/112 Comp grind with .775 lift didn't show much improvement, but i only had 528 cubes . And i also had more problems with rocker bearing failures due to the intake angled pushrods.

I too had those jesel issues with the offset rocker. Tim Bowman actually talked to you about your post on moparts years ago and I sent my rockers to jesel and had them make that modification so I stopped having the rocker bearing issues.

And yes I agree with longer life between rebuilds. My 528 ran great with a best of 5.43 at 125 in the 1/8. Only reason I went to 540 was because I had an eagle crank fail on the 528. That 528 had been 361 runs before overhaul and everything looked great inside. Then 70 more runs later, crank failed hahaha.

Knock on wood, my 540 will last just as many runs in between overhauls as the 528 did.

 

[9secRR]

My current cam is 285-296 @ .050 .776/.752 with 1.6 rockers. 540".
Wallace racing says 5.38 at 2835lbs is 960 fly wheel HP.
Whether that is true or not, I don't know. I just know the engine runs well.

i would like to hit 5.50 but i don't think i got enough for that. with the new Charlie Westcott Jr. cam (next winter) it might run it.

 

[71Demon540]

i would like to hit 5.50 but i don't think i got enough for that. with the new Charlie Westcott Jr. cam (next winter) it might run it.

That is gonna be sweet!

Your stuff is sick though man. Only 414" small block, heavier car than me, and still have an 8 second ride! That is pumping out some steam.

Honestly until I got on A-bodies and became friends with a small block guy that I did a transmission for, I NEVER realized how much power was able to come from the Mopar Small block. It is impressive.

 

[9secRR]

That is gonna be sweet!

Your stuff is sick though man. Only 414" small block, heavier car than me, and still have an 8 second ride! That is pumping out some steam.

Honestly until I got on A-bodies and became friends with a small block guy that I did a transmission for, I NEVER realized how much power was able to come from the Mopar Small block. It is impressive.

thanks, its a fun ride. i can't wait to put the new cam in, Charlie said it will make a lot more steam.

 

[71Demon540]

thanks, its a fun ride. i can't wait to put the new cam in, Charlie said it will make a lot more steam.

He would know!